REST APIs are the interface between clients and servers that allows for data to be shared across platforms, providing a seamless connection between applications, databases, and other resources. A REST API Developer is the programmer who helps clients connect their applications to a certain platform and ensure data is flowing between the two in an efficient, secure manner. This can help to reduce friction, improve performance & scalability, boost security, streamline website navigation, and more.

REST API Developers build and maintain custom programming to enable automated data retrieval and communication with a client’s desired application or platform. This can encompass services such as quickly integrating third-party payment systems into an existing website, minimizing manual work and improving customer experience. They may also incorporate priority systems; for example creating different APIs for handling bulk vs single requests for heavy workloads. Ultimately a REST API Developer helps clients bridge the gap between complex platforms and transform data into valuable business insights.

Here’s some projects that our expert REST API Developers made real:

  • Establishing communication between different applications
  • Creating priority systems for managing large volumes of requests
  • Integrating third-party payment systems into an existing website
  • Developing programming to seamlessly retrieve dynamic data
  • Designing secure connections to protect confidential information

Our highly-skilled REST API Developers are experts when it comes to stitching together the critical links which connect disparate platforms together. With years of experience they have been able to tackle innumerable projects which have led to successful outcomes for our clients. If you have an issue related to connecting your application with another platform or require automated data retrieval services then you can post your own project here on Freelancer.com and hire one of our experienced developers today!

From 50,039 reviews, clients rate our REST API Developers 4.9 out of 5 stars.
Hire REST API Developers

REST APIs are the interface between clients and servers that allows for data to be shared across platforms, providing a seamless connection between applications, databases, and other resources. A REST API Developer is the programmer who helps clients connect their applications to a certain platform and ensure data is flowing between the two in an efficient, secure manner. This can help to reduce friction, improve performance & scalability, boost security, streamline website navigation, and more.

REST API Developers build and maintain custom programming to enable automated data retrieval and communication with a client’s desired application or platform. This can encompass services such as quickly integrating third-party payment systems into an existing website, minimizing manual work and improving customer experience. They may also incorporate priority systems; for example creating different APIs for handling bulk vs single requests for heavy workloads. Ultimately a REST API Developer helps clients bridge the gap between complex platforms and transform data into valuable business insights.

Here’s some projects that our expert REST API Developers made real:

  • Establishing communication between different applications
  • Creating priority systems for managing large volumes of requests
  • Integrating third-party payment systems into an existing website
  • Developing programming to seamlessly retrieve dynamic data
  • Designing secure connections to protect confidential information

Our highly-skilled REST API Developers are experts when it comes to stitching together the critical links which connect disparate platforms together. With years of experience they have been able to tackle innumerable projects which have led to successful outcomes for our clients. If you have an issue related to connecting your application with another platform or require automated data retrieval services then you can post your own project here on Freelancer.com and hire one of our experienced developers today!

From 50,039 reviews, clients rate our REST API Developers 4.9 out of 5 stars.
Hire REST API Developers

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    I need the existing ANZ gateway upgraded to ANZ Bank Worldline Global gateway so customers can continue to pay without leaving the site. You’ll work directly with the Worldline REST API and build and install the new gateway. I will supply API keys, test credentials and server access to the AWS server where the website is hosted. Acceptance will be based on: 1. Passing transactions in Worldline’s sandbox, then live environment, with clear success and fail states reflected in the OpenCart order timeline. 2. No PHP notices, warnings or overrides to core files; code follows PSR-12 and OpenCart coding standards. If you’ve previously integrated Worldline let me know—the learning curve will be minimal. I’m aiming to test and push to production in a week, so ...

    $168 Average bid
    $168 Avg Bid
    36 bids

    I have the entire UI for a music-streaming mobile app ready to go; what’s missing is the working product. I’m handing you the Figma screens, AWS account, and all required tokens so you can turn the design into a production-grade Flutter application backed by Django and released on my AWS environment. Here’s what I’m expecting you to handle from end to end: • Flutter build: translate the existing UI pixel-perfectly for both iOS and Android, wire up audio playback, search, user libraries, and any other screens already designed. • Django backend: craft a clean REST/GraphQL API, implement user, playlist, and media endpoints, and connect it to whichever database layer you recommend (SQL, NoSQL, or a mix—happy to discuss). • AWS launch: provisio...

    $581 Average bid
    $581 Avg Bid
    197 bids

    Building a new mobile app in Flutter and I need a developer who already has three to four solid years working with the framework and, in particular, with the BLoC state-management pattern. The project targets both iOS and Android from a single codebase, so your experience shipping apps to the App Store and Google Play will matter. You will take charge of the full Flutter layer: setting up the architecture with clean, well-documented BLoCs, wiring up screens, and ensuring smooth performance on each platform. A clean folder structure, readable Dart code, and clear separation of concerns are non-negotiable, as this codebase will grow over time. Typical day-to-day work will include: • Converting Figma (or comparable) designs into responsive Flutter widgets • Implementing new feat...

    $295 Average bid
    $295 Avg Bid
    32 bids

    I need an experienced n8n specialist to design, build, and maintain automation workflows that pull together multiple APIs, webhooks, and AI services. The goal is to replace manual tasks with reliable, self-healing flows that scale as my business grows. Here’s what the engagement looks like: • Design & build new workflows in my self-hosted n8n instance, using native nodes, JavaScript function nodes, and error-handling best practices. • Integrate external platforms—CRM, email marketing, project management, or any other REST/GraphQL service—through secure API connections and custom webhooks. • Embed AI capabilities such as OpenAI or other machine-learning endpoints so each workflow can classify, summarise, or make decisions automatically. • Op...

    $68 Average bid
    $68 Avg Bid
    33 bids

    I run a fully custom React JS platform that presents investment dashboards to our users. I now need the site to pull live security-market data—specifically stock prices, detailed company financials, and the complete annual and quarterly reports for every covered company to summarize the data—directly from the Corporate data API provider we license. The task breaks down into two connected pieces: 1) API hookup • Authenticate against the vendor’s security market corporate API. • Build efficient React-friendly service calls (REST or GraphQL, whichever the API supports) that return stock prices, financial statements, and the full text of 10-K / 10-Q-style filings. • Cache or paginate data so pages stay fast even when a user requests multiple compani...

    $320 Average bid
    $320 Avg Bid
    46 bids
    Payment Link & Method Upgrade
    6 days left
    Verified

    I already process transactions through a Mobile Money aggregator, but it lacks two things I now need: 1) a shareable payment-link flow, and 2) additional ways for customers to pay. Here is what I’m after. You will leverage the aggregator’s REST API (and its webhooks) to generate a unique checkout URL for each order. When a shopper opens that URL they must be able to pay not only with their existing Mobile Money wallet but also with Visa/Mastercard credit or debit cards and other popular mobile wallets. Once the payment is completed or fails, the system should post the result back to my backend so I can automatically update order status. Key deliverables • A secure payment-link generator coded in Node that plugs into my current stack. • Front-end checkout scr...

    $151 Average bid
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    154 bids

    I’m kicking off a brand-new web application and want the entire stack set up from scratch. The backend must be built with Spring Boot, exposing clean REST endpoints and following best practices for security, logging, and testing. Data will live in a relational store—MySQL or PostgreSQL—so the schema, migrations, and repository layer should be wired for one of those engines with minimal friction to switch between them. On the front end I’m open to modern JavaScript frameworks; feel free to propose React, Angular, or another popular choice as long as it integrates smoothly with the Spring Boot API and supports responsive design. Because this is green-field work, the project will move through typical milestones: design, MVP, iterative feature drops, and deployment. I...

    $10 / hr Average bid
    $10 / hr Avg Bid
    48 bids

    Job Overview Position: Backend Developer (Java / Spring Boot) – Healthcare Location: Remote Type of Work: Freelance Start: now Hourly Rate: Up to $20 Duration:8 months Workload :Full time Project Context * The project is part of the Telematics Infrastructure (TI) in the healthcare sector. * The goal is to develop and enhance a cloud-based Identity Provider (IdP) solution for strong user authentication. * The environment is highly regulated and security-critical, due to the sensitive nature of healthcare data. * Architecture is based on modern Microservices and Cloud-Native technologies with a strong focus on security and compliance. Responsibilities The Backend Developer wants: * Develop and maintain backend services using Java (Java 21) and Spring Boot. * Implement authentication ...

    $19 / hr Average bid
    $19 / hr Avg Bid
    126 bids

    I’m putting together a single, streamlined web portal that will let me handle both ESIC and PF formalities in-house instead of juggling spreadsheets and government sites. Core workflow • A clean interface where I can add a new employee once and have the system push that record to the ESIC database and, in the next phase, to the PF module. • Edit screens so I can update name, address, wages or any other statutory field later without touching raw SQL. • On every successful registration the portal must fire an email confirmation to the employee (SMTP details will be provided). Tech notes I’m comfortable with a browser-based stack—Laravel, Node, Django or similar—so pick whichever you move fastest in. The only must-haves are: – Role-...

    $5 / hr Average bid
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    28 bids

    Please Dm only when Developer with 4+ years of experience in Java Can connect offline places if u r nearby (Hinjewadi,wakad,Pimple Saudagar,pimpri, chinchwad) I need a Java-based backend whose sole purpose is controlling who can see and do what inside an admin portal. Think of it as the engine for authentication and fine-grained authorization; the front-end will call your APIs to sign users in, assign them the correct privileges, and block anything they are not entitled to. I am leaning toward Spring Boot with a familiar security stack (Spring Security, JWT or OAuth2), but if you have a cleaner Java solution I’m open to hearing it. The service must expose well-structured REST endpoints, persist its data reliably, and be easy for another developer to plug into a React admin UI ...

    $219 Average bid
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    38 bids

    I’m planning a full-featured food ordering application and need someone who can take it from concept to launch on iOS, Android, and the Web. Users must be able to create and manage their accounts, browse a live list of restaurants with searchable menus, place orders, and watch those orders move from kitchen to doorstep in real time. Secure, seamless payment is essential, so please be comfortable integrating multiple gateways—think major credit cards, Apple Pay, Google Pay, and other popular wallets—while keeping PCI compliance in mind. To keep operations smooth for both diners and restaurant partners, I also expect a clean admin/back-office interface for menu updates, order status changes, and basic analytics. Deliverables I’m looking for: • Production-re...

    $371 Average bid
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    82 bids

    Backend Senior Engineer (Freelancer) We are looking for an experienced Backend Senior Engineer to build and deploy a scalable backend system for a high-traffic training management platform. The system will include approximately 100–110 APIs and must support a large user base with strong performance, security, and reliability. Tech Stack Node.js PostgreSQL Redis Docker Key Responsibilities Design and develop a scalable backend architecture Build and maintain 100–110 REST APIs Implement secure authentication and authorization Develop database schema and optimized queries using PostgreSQL Use Redis for caching, session management, and performance optimization Ensure API security, validation, and rate limiting Handle backend deployment using Docker Configure CI/CD ...

    $648 Average bid
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    63 bids

    design and build a high-quality iOS application based on an existing product concept and web platform that I am currently developing. The objective is to translate the core functionality of the platform into a clean, premium, and highly reliable native iOS application. The application should feel modern, elegant, and intuitive while maintaining strong performance, scalable architecture, and production-level code quality. The product is centered around a platform that allows teachers or instructors to manage and conduct classes with their students. The platform combines scheduling, class management, communication, and payment tracking into a single streamlined interface. The iOS application should replicate and enhance these capabilities for mobile users while ensuring that the experience ...

    $343 Average bid
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    42 bids

    I’m building a classic, professional-looking website that will serve as the account hub for an upcoming mobile app. Visitors must be able to create an account with their email, confirm it through a verification link, and have their details stored in MongoDB. From there, the site needs to expose a secure API so the mobile app can: • check a user’s premium status in real time • grant or revoke the free premium rewards we’ll offer at launch A referral system is central to the concept. Each new user should automatically receive a unique referral link and a scannable QR code. When someone signs up through that code, the original referrer’s premium membership is extended; the database has to track these relationships so the extension logic stays accura...

    $113 Average bid
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    41 bids

    I already trade intraday through Zerodha and have a clearly defined strategy; what I now need is an app that plugs into the Kite Connect API and executes those trades for me automatically. The single-minded goal is fast, reliable trade execution during market hours, with automated order placement based on parameters I will supply. Here is what matters to me: • The code must authenticate to my Zerodha account securely, listen for my entry/exit signals (I can expose them as a simple REST endpoint or as a CSV-based watchlist—whichever is easier for you), and place market or limit orders instantly. • Every order response, rejection, or partial fill should be captured in a log so I can audit what happened at the end of the day. • Positions should be squared off before...

    $796 Average bid
    $796 Avg Bid
    176 bids

    My production Flutter app is live on Android and iOS phones right now, but I need to push it much further so it also shines on tablets and a Windows desktop build. The next release must feel polished, run offline without hiccups, and bring serious value-add features that keep merchants and their customers engaged. Core scope • Offline-first architecture with local persistence and an auto-sync routine that silently pushes queued actions once connectivity returns. • A chat-style, rule-based onboarding that walks new merchants through business registration step by step, validating inputs on the fly. • Referral and rewards module focused on a wallet / credit balance. Every reward earned, spent, or expired must update instantly in the user’s local ledger and sync to ...

    $1246 Average bid
    $1246 Avg Bid
    112 bids

    An experienced developer is required to create an electronic invoicing integration module for an existing Point of Sale (POS) system. The POS system is developed using PHP and MySQL. The module must comply with the electronic invoicing regulations and requirements of the Dominican Republic. The project involves researching the relevant API and local standards, designing and implementing the module, and integrating it with the POS system's MySQL database. We are seeking a robust and reliable solution that ensures fiscal compliance and operational efficiency. For data exchange, the Extensible Markup Language (XML) standard is utilized; all such data must be digitally signed. A Swagger (OpenAPI) document can be found at the base URL for each of the different environments; this document...

    $45 Average bid
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    36 bids

    I’m looking to partner with a versatile developer who is equally comfortable writing clean Python on the back end and crafting polished interfaces with HTML / CSS, JavaScript, and React on the front end. You’ll join me on a project-by-project basis, so the exact feature set may shift from one engagement to the next, but the common thread is always a Python-driven web application that needs a modern, responsive UI. Typical tasks could include: • Building or extending RESTful endpoints in Python • Wiring those endpoints into dynamic React components • Styling the resulting views so they look crisp across devices Clean, well-documented code and clear Git commits are essential, because other team members may pick up where you leave off between phases. If you en...

    $6 / hr Average bid
    $6 / hr Avg Bid
    48 bids

    I need a polished social media application released simultaneously on iOS and Android. The core experience revolves around three pillars—real-time messaging, effortless photo/video sharing, and a scrollable news feed that feels lively yet intuitive. Smooth in-app camera access, reactions, push notifications, and quick media loading are all part of the vision. For sign-up and security, the app must support: • Email & password accounts • Social-media single-sign-on (e.g., Apple, Google, Facebook) • Phone-number verification with OTP A clean architecture, secure REST/GraphQL API layer, and a scalable database are non-negotiable. Whether you prefer Flutter, React Native, Swift/Kotlin, or another modern stack, performance and UI consistency across devices come...

    $795 Average bid
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    197 bids

    I am creating SupplyGate, a web-based procurement platform that streamlines everything from purchase requests to purchase orders. The core modules I need delivered are: • User management for three distinct roles—Admins, Suppliers and Purchasers—each with tailored permissions and screens. • Standard email-and-password authentication, with secure password reset and basic account-lock rules. • A supplier directory where Admins and Purchasers can add, edit or deactivate supplier records. • Purchase Request flow: Purchaser drafts, Admin approves. • RFQ generation directly from an approved request. • Supplier quotation portal so invited suppliers can submit their prices and terms online. • A side-by-side quotation comparison table that ...

    $548 Average bid
    $548 Avg Bid
    162 bids
    Automate Bank & UniPin APIs
    4 days left
    Verified

    I run a Laravel 10 Xtora-based top-up site that sells Mobile Legends diamonds. I want to take the manual work out of the entire purchase flow, from payment confirmation to diamond delivery. What needs to happen 1. The moment a customer completes a transfer to my BOB Bank account, the system should detect the transaction through the bank’s API (or any webhook the bank exposes) and instantly mark the related order as paid. I am not yet sure whether BOB provides full documentation, so you may need to help me confirm their capabilities and handle authentication, polling, or webhook endpoints accordingly. 2. As soon as an order is paid, the site must call UniPin’s supplier API to deliver the correct diamond package to the player’s UID, then update the order status in Larave...

    $51 Average bid
    $51 Avg Bid
    30 bids

    App project is already given to Toheeb please developers you can stop sending me messages. I need Pharma Sales Operations android and ios app I need mobile application that streamlines pharmaceutical sales operations. The system will support three distinct roles—MR, Seller, and Admin—each with its own dashboard and permissions. Core data domains include user profiles, financial transactions (orders, invoices, commissions), and product inventory, so the database design must accommodate all three from day one. Key functionality I expect: * Sales dashboards that surface daily targets, territory coverage, and revenue metrics for MRs and Sellers. * Rich reporting tools for trend analysis, product performance, and commission calculations, exportable to Excel or PDF. * Robust user m...

    $351 Average bid
    $351 Avg Bid
    45 bids

    Job Title: Full stack Developer Job Type: Part-time Location: Remote (USA time zone, normal business hours) Job Summary: We are seeking an experienced Full stack Developer to join our dynamic team on a part-time basis. The ideal candidate will have proficiency in Python, Node.js, and React. You will be responsible for designing and implementing scalable web applications, ensuring smooth user experiences, and collaborating with other team members through written communication due to our asynchronous work culture. Key Responsibilities: Develop and maintain web applications using Python, Node.js, and React. Collaborate with cross-functional teams to define, design, and ship new features. Write clean, maintainable, and efficient code. Troubleshoot, debug, and upgrade existing systems. Pa...

    $20 / hr Average bid
    NDA
    $20 / hr Avg Bid
    69 bids

    I need a single POS suite that runs smoothly on Samsung (Android), Apple (iOS) and any modern web browser, then feeds consolidated data into Microsoft Power Apps for workflow extensions and Power BI for live reporting. Core features • Sales transactions processed at the till with barcode scanning, discounts, multiple payment types and printed or emailed receipts. • Real-time inventory management that updates stock counts automatically after each sale, flags low levels and supports basic purchase-order creation. User hierarchy Cashiers should see only the sales screen and today’s totals. Admin staff need full back-office control—price changes, product uploads, stock adjustments, user management. Head-office users must be able to view every location, push glob...

    $561 Average bid
    $561 Avg Bid
    107 bids

    I need a full-flow system that listens to TradingView webhook alerts, translates each alert into orders for three separate segments—F&O stocks, index options (Nifty 50, Sensex, Banknifty), and long-term stock investments—and shows everything on a custom web dashboard. Core logic will sit in Python. The strategies already exist in TradingView; their alerts will carry the payload you map into the order manager. The code should recognise the indicators I work with—Moving Averages and RSI—so parameter changes on those indicators in TradingView are reflected in position sizing and entry/exit logic on the Python side. Two trading modes are required: • Paper trading for safe strategy iteration • Seamless switch to live trading once validated On the fro...

    $263 Average bid
    $263 Avg Bid
    34 bids

    No errors appear on the frontend, yet the records never land in the backend, so the breakdown is clearly in the API hand-off from to ERPNext. I need someone who truly understands both the Frappe REST API and modern (React 18, Node, TypeScript, Axios/fetch) to trace the request flow, pinpoint the failure, and deliver a clean, tested patch. I am happy with the existing codebase otherwise, so the job is strictly about restoring reliable, real-time syncing in that one direction. Please plan to: • audit the current integration layer and identify the exact call or webhook chain that drops the merchant payload • implement the fix (whether that means adjusting authentication, request formatting, or ERPNext endpoint configuration) without breaking anything else • add a qui...

    $168 Average bid
    $168 Avg Bid
    70 bids

    I'm a Python programmer looking to develop an e-commerce web application. Key features: - User authentication and profiles Ideal skills and experience: - Proficiency in Python and web development frameworks - Experience in building secure authentication systems - Background in developing e-commerce platforms - Strong knowledge of database management Looking for a skilled developer to bring this project to life.

    $493 Average bid
    $493 Avg Bid
    151 bids

    I need a complete ride-hailing application, similar in flow and polish to Uber, running smoothly on both iOS and Android. The build must cover every user group—passengers, drivers, and admins—and include the essential ride-share features of secure user registration/login, in-app payments, and true real-time vehicle tracking on the map. Below is the concrete scope of work and deliverables I expect. • Passenger experience – Sign-up/login via email, phone, or social (OTP required) – Live map with nearby drivers, fare estimate, promo code support – One-tap booking, live driver ETA, in-trip status, and rating system – Card and wallet payments processed in-app; receipts emailed automatically • Driver experience – On/off...

    $2957 Average bid
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    152 bids

    We are a Bangalore-based Fintech Startup into Mutual Funds, SIPs domain. We are looking for a 6+ years of experience as a Full Stack Developer in MERN Tech Stack with AWS hands-on experience resource for Conducting Technical Interviews for candidates with 3 to 5 years of experience in Full Stack Development (MERN) This technical Interview needs to be conducted on Google Meet, and the questions should be purely Machine Testing/ Coding Testing of the candidates, with very limited theoretical questions to be asked. Our overall aim of conducting the Interviews of these candidates should be to check how good these candidates are in coding, and they must DEMONSTRATE IT IN LIVE CODING. Please apply ONLY IF you have 6+ years of Experience in MERN Tech Stack with AWS and have experience in condu...

    $10 Average bid
    $10 Avg Bid
    8 bids

    project overview we are building webflix, a browser-based streaming platform. the frontend is built with angular and communicates with an existing backend API. video playback is handled through an embedded video player (iframe), so the frontend is responsible mainly for: - UI - API integration - user flows - playback pages The project is partially complete and requires an experienced angular developer to review, clean up, and finish the frontend. current stack frontend: angular 11 typescript bootstrap 4 videojs fontawesome the project already contains a structured angular architecture with modules such as: authentication user dashboard subscriptions wallet / payments UI media library search ratings profile management work required code review and stabilization review the existin...

    $526 Average bid
    $526 Avg Bid
    164 bids

    We are running an ecommerce website and mobile application platform and looking for an experienced freelance Full Stack .NET developer for technical support and feature development. The main requirement is to maintain and improve our existing ecommerce system. The developer will be responsible for fixing bugs, improving performance, integrating third-party APIs such as payment gateways or logistics services, and supporting database-related tasks. The project also includes creating new modules or enhancements as per business requirements. The developer should have experience working on live production systems and must be comfortable troubleshooting real-time issues. Required Technical Skills: Strong experience in ASP.NET / C# development Knowledge of Microsoft SQL Server and database o...

    $101 Average bid
    $101 Avg Bid
    50 bids
    iOS & Android Spam Filter
    3 days left
    Verified

    I need a single app that runs on both iPhone and Android and blocks spam or unknown callers automatically. Whenever a call comes in, the app must check two sources in real time: • the device’s own contact list • a cloud-based “safe numbers” database I already host (REST endpoint provided) If the number appears in either source, the phone rings as normal. If not, the call is silently routed straight to voicemail. Every incoming attempt—allowed or blocked—should be logged inside the app so the user can review which numbers tried to get through. Core requirements • Native-feeling solution that complies with CallKit / Call Directory Extension on iOS and the equivalent Telephony APIs on Android so filtering keeps working even when the app ...

    $2214 Average bid
    $2214 Avg Bid
    181 bids

    Project Overview: I am seeking a highly skilled n8n Automation Expert to develop and deploy a sophisticated, end-to-end content generation engine on my own n8n instance. The goal is to automate SEO-optimized article writing, AI image creation, and multi-platform social media distribution while using Google Sheets as a central database for content management and duplication prevention. Required Workflow & Technical Logic: Smart Trigger & Duplicate Prevention (Google Sheets): The workflow must run on a Cron Job (scheduled). Before generating any content, the system must query a specific Google Sheets file to ensure the topic or title has not been used previously. After a successful run, the workflow must append the new Title, Date, and WordPress Post URL to the sheet to prevent ...

    $99 Average bid
    $99 Avg Bid
    38 bids

    The project involves building a text-based chatbot that can chat naturally with our clients and give reliable, friendly advice on general dog care. I want the bot to understand free-form questions (feeding schedules, grooming routines, exercise needs, basic wellness pointers, etc.), pull the right answer from a curated knowledge base, and reply instantly through a simple text interface on our website and, later, inside our mobile app. Core expectations • Conversational accuracy: the NLP must recognise common dog-related phrases, misspellings, and emotive language, then map them to the correct care tip. • Easy upkeep: I should be able to update or expand the knowledge base without touching code. • Smooth integration: embed the chat window in our existing React site and...

    $1257 Average bid
    $1257 Avg Bid
    295 bids

    I’m planning to roll out a new Android application built with Flutter and supported by a Laravel-powered REST API. All code should be production-ready, well-structured, and clearly commented so my in-house team can maintain it after hand-over. The job covers: • Setting up the Laravel backend (auth, role management, and any additional endpoints we agree on). • Building the Android client in Flutter, fully wired to the API. • Solid error handling, state management, and responsive UI that feels fast on a wide range of devices. • Clean Git workflow: feature branches, readable commits, and a short onboarding note explaining how to spin the project up locally. Please highlight any similar apps you’ve shipped with Flutter plus Laravel, your preferred state-...

    $105 Average bid
    $105 Avg Bid
    99 bids

    ONLY BUILD IF YOU HAVE STRONG EXPERIENCE IN THESE AREAS SIP, NAT Traversal, Asterisk/FS, React and strong backend servers scaling. I’m building a browser-based VoIP platform dedicated to business communication and I need an experienced React developer to take it from architecture to live deployment. The entire feature list—covering everything from secure voice and video calling to messaging and call-related utilities—is spelled out in the requirements document I’ve attached, so you’ll have clear, granular guidance from day one. SIP, NAT Traversal, Asterisk/FS Tech expectations You’ll craft a responsive single-page app in React (TypeScript preferred) that connects to a SIP/WebRTC back-end. I’m open to your preferred server stack (Node/Express,...

    $4082 Average bid
    $4082 Avg Bid
    24 bids

    Utilize como base: Customize Paymenter to function similarly to WHMCS. My business type does not sell domains. 1 - Create Stripe module 2 - Create Coinpayments module 3 - Create Binance module 4 - Create API-based service provisioning module 5 - Customize administrative area 6 - Customize client area Create documentation for these modules, as well as the entire deployment process based on Debian 13.

    $498 Average bid
    $498 Avg Bid
    165 bids

    I have an existing Ionic (Cordova, Angular, SCSS) app that needs two things at once: a small set of new features and a clear visual lift. On the UI/UX side I’ve decided to focus on visual enhancements—cleaner colour palettes, updated icons, smoother transitions and micro-animations that give the app a modern, consistent feel across Android and iOS. I can share brand guidelines and screens so you can translate them into themed components and style sheets. Functionally, there are a few minor additions to wire in: extra screens, small workflow tweaks and new calls to the current REST API. I’ll walk you through the repo and explain the exact user stories once we start. Deliverables • Updated source code with agreed visual improvements • New functionality fu...

    $68 Average bid
    $68 Avg Bid
    16 bids

    I’m kicking off a three-month, full-time engagement (with the option to extend) to move a sizeable customer data set from legacy sources into Salesforce while simultaneously wiring Salesforce into our wider application landscape through SnapLogic. The core objective is both migration and integration, so you’ll be hands-on across the entire data journey—from extracting millions of legacy records to building high-performance SnapLogic pipelines that keep Salesforce in sync with ERP, marketing, and other in-house systems. What the work looks like • Assess current data structures and map them cleanly to the Salesforce data model, respecting relationships, look-ups, and custom objects. • Build and optimise SnapLogic pipelines for bulk loads, transformations, and...

    $2185 Average bid
    $2185 Avg Bid
    14 bids

    I’m running an ERPNext instance that already holds our core data, but several areas still need to be molded to the way we actually work. I’d like you to dive into the Frappe Framework, extend existing DocTypes, design new workflows, and tighten up reports so my team no longer fights the software. Here’s what I need from you: • Tailored module tweaks – create or modify DocTypes, forms, and server-side logic that capture our real-world processes. • Workflow and automation improvements – from simple client scripts to background jobs that remove manual steps. • Custom reports – actionable, filterable views my managers can use daily. • Integration readiness – if we decide to hook ERPNext to external services later, your code ...

    $3 / hr Average bid
    $3 / hr Avg Bid
    19 bids

    I’m a Hindustan Unilever distributor who currently exports data from two separate LeverEdge (Retail and Wholesale) instances and then uploads it manually into Zoho Books. I’d like that entire flow replaced by a Python-driven, Zoho RPA-assisted bot that runs end-to-end without human touch. Here is the scope you’ll be taking over: • Dual login sequence – the bot must authenticate into each LeverEdge account one after the other, pull the day’s XML/Excel dumps, and keep the two data sets isolated for reporting. • Nine functional modules must stay in perfect sync: Sales Register, Collection, Product & Party Masters, Purchases, Purchase Returns, Credit Notes, Debit Notes, Tax Analysis, and HUL-specific Scheme calculations. • Data transformat...

    $1207 Average bid
    $1207 Avg Bid
    33 bids

    Title: WordPress / API Developer – Hotel Deposit Authorization System + Hostex Integration Project Description I operate a small hotel / short-term rental business and use Hostex PMS to manage reservations. I need a developer to build a security deposit authorization system connected to my WordPress website. Guests should receive a secure link before arrival where they can enter their credit card to place a security deposit authorization hold (not a charge). Current Infrastructure • VPS server (Ubuntu) • Docker environment • CloudPanel • WordPress website • WooCommerce • Hostex PMS • Payment gateway: Xendit • n8n automation server The developer can deploy services using Docker containers if needed. Deposit Workflow 1. Guest makes a rese...

    $171 Average bid
    $171 Avg Bid
    148 bids

    I generate a steady flow of personal-loan leads every day and I’m ready to start monetising them. What I still need is the technical and marketplace framework that allows buyers to receive those leads in real time, either through a classic ping/post flow or a straightforward REST API. Here’s what I know so far: • I’m happy to sell through public marketplaces as well as direct integrations, so please feel free to suggest LeadConduit, Lead Prosper, boberdoo, CAKE, or any platform you feel is fit for purpose. • My leads are strictly for the personal-loan space, so whatever routing logic you build needs to respect that vertical’s typical data fields and compliance requirements (TCPA, CAN-SPAM, etc.). • I don’t have any existing infrastructure...

    $185 Average bid
    $185 Avg Bid
    77 bids

    I need a web-based administrative panel that lets me oversee several IPv4 proxy servers running 3Proxy from one place. The panel should: • Auto-configure new or rebuilt servers, applying 3Proxy settings and firewall rules without manual SSH work. • Push software updates, configuration edits, and security patches to every connected host remotely. • Expose a documented RESTful API so other systems can create, suspend, rotate, or delete proxies programmatically. • Support multiple user roles—at minimum Admin plus one or more limited roles—with a clean permissions model. • Display real-time status (online/offline, traffic, errors) and basic analytics for each proxy. A straightforward, responsive UI is essential; think login, dashboard, server list...

    $490 Average bid
    $490 Avg Bid
    212 bids

    My team needs a robust, bi-directional link between Wrike and Encodify up and running within the next 4 to 6 weeks. The integration must keep workspaces perfectly in step by handling: • Data synchronisation of tasks, projects, comments, notes and user profiles • Automated task creation / status updates so neither platform becomes a manual bottleneck • Near real-time updates in both systems, triggered by webhooks or an equivalent event-based approach Wrike should push every relevant change to Encodify and vice-versa, with conflict-handling logic to prevent overwrites. A clean audit trail on both sides is essential so we can see exactly when and where items were updated. Deliverables 1. Source-controlled integration code (Wrike & Encodify APIs, REST/OAuth...

    $1025 Average bid
    $1025 Avg Bid
    13 bids

    I need an end-to-end build of a taxi-booking ecosystem that covers three mobile experiences (rider, driver, operator) and a cloud-hosted SaaS core. For riders on Android and iPhone, the interface must make it effortless to schedule a trip, watch the vehicle approach in real time, pay by card, wallet or other gateways, and immediately rate the ride and leave feedback. Google / Apple Maps, a mainstream payment gateway and an SMS provider must be wired in cleanly. The operator dashboard will live on the web. It needs to display live fleet locations, let staff drill into analytics and reporting, and surface driver performance metrics at a glance. Charts, exportable reports and real-time filters should all feel native and quick. Drivers get their own app focused on navigation and route...

    $726 Average bid
    $726 Avg Bid
    159 bids

    I need an end-to-end face-recognition attendance solution that splits its workload between a Raspberry Pi at the edge and a lightweight cloud frontend. On the edge – The Raspberry Pi must run an optimised computer-vision model that can detect and recognise multiple faces in the same frame, then immediately tag each recognised person with a timestamp. All inference happens locally; only the processed results travel to the cloud, never the raw video. Model size, frame rate and power draw have to suit a typical Pi 4 with a standard camera module. Connectivity & data flow The Pi should expose a small, secure REST or MQTT service that pushes attendance events to the cloud and retries automatically if connectivity drops. A simple enrolment script should let me add new faces direc...

    $266 Average bid
    $266 Avg Bid
    29 bids

    We will only review applications that clearly prove prior development of a SCORM player or SCORM runtime engine. Please include the name of the player, the project, and a short description of your role in its development. Applications without this proof will not be considered. We are looking for an experienced software development agency to build a SCORM content player that integrates seamlessly with our existing cloud-based Learning Management System (LMS). The objective is to replace our current external content player with our own integrated solution. I. Project Goal Develop a standards-compliant content player capable of running and tracking e-learning content inside our multi-tenant LMS. The player must: - import SCORM courses - launch and play SCORM content - create l...

    $12 / hr Average bid
    $12 / hr Avg Bid
    56 bids

    Looking for Flutter Developer We are looking for an experienced **Flutter developer** for a marketplace mobile app. Project Details: * Backend: Already completed * UI/UX: Figma design ready * Task: Develop the mobile app using Flutter * Timeline: 1 month Budget: ₹15,000 – ₹20,000 (based on experience and delivery) Requirements: * Experience with Flutter and API integration * Ability to convert Figma designs into responsive UI * Good communication and ability to deliver within the timeline

    $167 Average bid
    $167 Avg Bid
    59 bids

    We are looking for a skilled React and Developer to join our remote engineering team. You will be responsible for building scalable, high-performance features across our ticketing and event management platform using modern web technologies. Responsibilities • Develop and maintain web applications using and React • Build scalable backend integrations with PostgreSQL • Integrate and deploy applications using AWS infrastructure • Write clean, maintainable, and well-documented code • Collaborate with product managers, designers, and backend engineers • Optimise application performance and ensure responsiveness • Participate in code reviews and technical planning Required Skills • Strong experience with NestJs and React • Solid understan...

    $13 Average bid
    $13 Avg Bid
    22 bids

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