Backend Development Jobs

Backend Development is a critical part of any website or software product. It starts with understanding the client's goals and developing solutions that achieve those goals in a cost-effective and scalable way. Backend developers are responsible for more than just code: they have to have a strong understanding of databases, frameworks, and development in general. A backend developer uses this knowledge to turn complicated customer requirements into a efficient, automated solutions that the user experience (UX) team can work with.

When it comes to Backend Development, experience matters - you want someone who's seen a variety of projects and knows the best technology to use for your specific scenario.

Here's some projects that our expert Backend Developer made real:

  • Developing connected systems between websites and local servers
  • Integrating software systems using modern real-time protocols
  • Building bespoke solutions tailored to customer requirements
  • Taking over existing projects and resolving tricky bugs
  • Developing custom solutions using tried and tested frameworks

Backend Development encompasses a wide variety of skills and technologies, so it helps to have an experienced developer on your team who can navigate the complexities of building high-quality solutions. Our expert developers have already undertaken a variety of different projects and can jump into yours with confidence - benefit from their expertise, get your project completed quickly and correctly, and reduce time-to-market for your product. Get in touch today to discuss bringing your project to life, or post your own project in Freelancer.com to hire an experienced Backend Developer.

From 134,863 reviews, clients rate our Backend Developers 4.85 out of 5 stars.
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    24 jobs found, pricing in USD

    I am looking for someone who has experience SPECIFICALLY with the software and has previously built out templates. In your application, please include: - Examples of past work with this specific system - What you worked on within the system Looking forward to transforming OpenToClose together.

    $544 (Avg Bid)
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    22 bids

    I'm looking for a tech-savvy freelancer who can help me build a comprehensive survey management system. The system's primary focus will be on real-time data processing, report generation, and user access control. Key Features: - Real-Time Data Survey: The system needs to support data surveying in real-time. Experience with live data handling and processing is highly valued. - Report Generation: It should be able to organize and present the collected information in the form of comprehensive reports, so experience in data analytics and visualization tools would be beneficial. - User Access Control: The ability to control and manage user access is also required, meaning a background in user rights management and system security is preferred. I didn't specify an industry, impl...

    $1187 (Avg Bid)
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    127 bids

    I am looking for talented and experienced mobile app developers who can build an engaging mobile app for both iOS and Android platforms for the general public. The main purpose of my mobile app is to provide personalized food recommendations to users. Features: - Social Media Integration: Users should be able to create an account using their existing social media accounts. - Push Notifications: The app needs to send alerts and updates through push notifications to the users, ensuring they are always up-to-date with the app. - AI/ML Algorithm: The core feature of the app, it should provide personalized food recommendations depending on the user's preferences and past behaviour. - Social Networking to connect with friends: Users should be able to share their recommendations or favouri...

    $1008 (Avg Bid)
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    A recent update has broken our submit resume function . We need to fix this

    $29 (Avg Bid)
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    52 bids

    I'm seeking a capable developer to create a network intrusion detection and prevention system that leverages deep learning. This tool should be capable of providing real-time monitoring, deep analysis, and be integrated with a user-friendly web application. The primary functionality of the system should be: - Anomaly detection: using advanced deep learning algorithms to analyze network patterns and identify any unusual activities that could signify a possible attack. For the web application's interface, the system should present: - Graphical representation: visually display detected anomalies in a clear and intuitive manner, allowing for quick interpretation of the security status. The ideal candidate should possess strong skills in deep learning, anomaly detection, network...

    $14 (Avg Bid)
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    I'm looking for a developer who will replicate the front end site, set up callback functions.

    $210 (Avg Bid)
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    42 bids

    We seek a seasoned Web Analytics expert to lead technical Google Analytics 4 (GA4) implementation projects across various sectors. The role involves transitioning clients to GA4, crafting measurement strategies, and integrating Google Tag Manager (GTM) for data transmission. Key responsibilities include tagging sites, conducting tag reports, and collaborating with cross-functional teams. ** Required Skills & Experience: = = = = - In-depth knowledge of GA4 standards. - 3-5+ years' experience in web analytics with GA4 expertise. - Proficiency in GTM, digital marketing, and analytics tools. - Strong communication and interpersonal skills (in English). - Hands-on experience in tag implementation & maintenance. - Ability to troubleshoot technical issues in GA4 and GTM. - Confi...

    $21 / hr (Avg Bid)
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    i want full stack developer who can make my match making website , need to have knowledge of WordPress and database and APIs.

    $338 (Avg Bid)
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    26 bids

    We are looking for full-stack developers/Senior Mobile Software Engineers for various projects we get assigned to us. If you are interested in joining and working on different projects from time to time (mostly together with different people in different companies) these projects duration from 1 to 6-8 months. It doesn't matter what specifically you are experts in, but everyone is welcome because there is safe work in most things. To proceed with the hiring process, we kindly request that you submit your updated resume along with any additional information that you believe would support your application. This may include, but is not limited to, professional references, a portfolio of your work, or a brief cover letter detailing your interest in the position and how your qualifications...

    $20 / hr (Avg Bid)
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    I'm in need of a skilled web designer to help create a website for my start up. The website will primarily serve the purpose of e-commerce and the target audience will be business to business (B2B). Key Requirements: - The website should have a strong focus on product descriptions. - The layout must be user-friendly and easy to navigate. - Experience with e-commerce sites is required. Skills and Experience: - Proficiency in creating e-commerce websites - Experience working on B2B projects - Strong writing and communication skills - Ability to design aesthetically pleasing and functional layouts.

    $2269 (Avg Bid)
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    I'm in need of an experienced developer to design an advanced bot for my Telegram channel. The bot will allow users to purchase digital products, such as JPG files containing valuable information, using cryptocurrencies like LTC, BTC, or ETH. The bot should be programmed to: - Process Payments: It should have secure payment processing capabilities for a smooth transaction experience for customers. - Send Automated Messages: The bot should be able to send prompt messages to users based on certain triggers. - Execute User Commands: It should understand and execute different user inputs effectively. Key Features: Admin Panel: Develop a secure and user-friendly admin panel for uploading, managing, and pricing JPG files. Product Display and Sales: Implement a catalog or list view fo...

    $4556 (Avg Bid)
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    I need a romanian backend developer to integrate an existing invoice/billing software (project is 4-5 years old and got updated quite often, so code is pretty clean) with the ANAF e-factura system via their API. The software is live and functioning, written in Symfony PHP (both frontend and backend). Key responsibilities: - Modify the software to send invoices via e-factura API to ANAF. Ideal skills: - Experience with API integrations or e-factura API.

    $508 (Avg Bid)
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    28 bids

    We are looking for a company which are expert in frontend and backend development to help us develop the following components: 1) Mobile App development (Android and iPhone packages): using Flutter language. 2) Backend development: using JavaScript or Python. The backend should be built as a microservice architecture to be able to handle thousands of requests per minute with ability to scale up and down and ability to have multiple databases read instance. For data storage we need your recommendation to use SQL or/and no-SQL data storage. 3) Web Console Development (Salon Console and Central Console): using HTML5/CSS/JavaScript (NodeJS) 4) Simple Website to present our service to the public: using HTML5/CSS/JavaScript (NodeJS) The design already made for all the components; PDF-exported...

    $4318 (Avg Bid)
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    117 bids

    I am looking for a skilled and experienced developer who can bring my vision to life. To successfully complete this project, the freelancer will need to demonstrate the following abilities: - Experience in developing sophisticated websites with unique functionalities - Proficiency in integrating APIs for both sending and retrieving data from a third-party service Specifically applying to this project are the following functionalities that are needed: - User registration and login - Payment gateway integration - Social media sharing capabilities This project offers a great opportunity for developers to showcase their expertise in web development and API integration. A keen eye for detail and a focus on functionality effectiveness are critical for this role.

    $179 (Avg Bid)
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    20 bids

    I'm seeking an experienced mobile developer to create an Android. The core features of the app would include: - Live Classes: The app must have a feature that allows live classes, offering real-time interaction between students and instructors. - Course Purchase: A feature to purchase courses should be included, with a range of course options to choose from. - Interactive Quizzes: To ensure learning retention and make the app engaging, interactive quizzes should be readily available for students after each lesson or course. The primary target for this project are students. Therefore, the app interface should be easy-to-navigate, encouraging user-friendly and seamless interaction for learners of all ages. Ideal candidates should have a strong portfolio of similar projects, an under...

    $733 (Avg Bid)
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    I'm seeking a talented JavaScript full stack developer to spearhead a new, interactive web project. ### Key Responsibilities: - Create and maintain a robust, interactive web application from scratch using JavaScript - Craft a UI that is focused on interactivity and user experience ### Required Skills: - Proficient in JavaScript - Experience with creating interactive web interfaces - Strong understanding of full-stack development processes ### Ideal Candidate: You are a responsive and detail-oriented professional with a knack for delivering interactive web designs. A solid foundation in JavaScript is paramount, along with a portfolio demonstrating your ability to handle a project from concept to completion. Bring your passion for creating engaging digital experiences and let's...

    $95 (Avg Bid)
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    I'm in need of a specialist who's well-versed with Google Workspace and domain integration. The tasks involve linking our domain to both our website and Google Workspace email. We're running into issues with setting the MX values correctly and need some expert assistance. Key tasks and requirements include: - Help with connecting our domain to our Dukaan built website. - Assist in integrating our domain with Google Workspace email. - Troubleshoot and fix issues with MX values. - Must have access to the DNS settings of our domain. Ideal Skills & Experience: - Extensive knowledge and experience with Google Workspace. - Experience with Dukaan and DNS settings. - Reliable, precise, and quick problem-solving skills. We've got the tools and access, we just need your...

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    8 bids
    Fantasy Football Website 2 hours left
    VERIFIED

    I need exactly this app: But as a website and built in MERN stack. It needs to have Frontend (React), Admin dashboard (React), Backend (Node and Express) and Database (Mongodb). These screens are needed on the frontend: Loading Screen Sign in and Sign up Home Screen Contest Screen My Contest Screen My Team Screen Create New Team Screen Player Info Screen Player History Screen Player Added Screen Team Preview Screen (2 Screens) Choose Captain Screen Reminder Screen My Matches Screen (3 Screens) Winning Screen Before Match Start Screen On Going Match Screen Match Completed Screen Match Starts Screen Player Performance Screen Wallet Screen Account Screen My Profile Screen (2 Screens) Leaderboard Screen Privacy Policy Screen About Us Screen Language Screen FAQs Screen Support Screen The ...

    $537 (Avg Bid)
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    Explicit Filtering Phase project as discussed in chat for phrase detection and resultant redirect.

    $470 (Avg Bid)
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    Hello! I need someone to build this site for me, ideally if you already have experience in this industry. As a reference I can offer already finished leaked source codes. (needs to be integrated with Bitcoin payment gateway, and I don't want to redirect users, I want it to be displayed everything on my site) (I will provide Bootstrap frontend)

    $176 (Avg Bid)
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    10 bids

    Busco implementar el aprendizaje adaptativo dentro de un sistema de Inteligencia Artificial. El objetivo principal es automatizar la entrega de contenidos. Este software estará diseñado para la educación K-12 y debería facilitar experiencias de aprendizaje personalizadas dentro de los campos de Matemáticas, Ciencias e Idiomas. Esencial para el trabajo: - Experiencia con Aprendizaje Adaptativo - Conocimientos en IA y Machine Learning - Comprensión del sector educativo K-12. - Familiaridad con los contenidos educativos de Matemáticas, Ciencias y Lenguaje.

    $7737 (Avg Bid)
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    L’application web doit permettre aux utilisateurs de saisir les données qu’une seule fois. Les données seront ensuite reprises dans l’ensemble des documents (environ 70). Cette automatisation doit permettre un gain de temps aux utilisateurs mais aussi d’éviter les erreurs entre les différents documents générés. L’application web informe et excite l’utilisateur à chaque étape de la procédure par des alertes et des bipes. L’application web devra proposer une bibliothèque de situations conséquentes préremplis en fonction des données dans l’application web. L’application web doit prévoir une option d’ARCHIVAGE NUMERIQUE de toutes l...

    $1131 (Avg Bid)
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    19 bids

    Am un web app scris in Symfony PHP (front + back) si doresc sa integrez e-factura in el prin API-ul celor de la ANAF. Practic vreau sa am un buton in aplicatie pe care cand il apesi trimite toate facturile la ANAF (fara dubluri daca sunt deja incarcate). Aplicatia este deja functionala si live de vreo 4-5 ani, avand update-uri destul de frecvent.

    $886 (Avg Bid)
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    15 bids

    Como compañía de manufactura necesitamos poder automatizar y digitalizar unos de nuestros procesos, aquí detalle del proceso. Proceso. 1. Deberá recepcionar una solicitud a través de API o por carga masiva, Excel. 2. Cada solicitud deberá pasar por una aprobación de calidad. 3. Cada solicitud aprobación genera 3 tipo de etiquetas. 4. Cada solicitud aprobada genera validación a través de API a software interno para ver existencia de material. a. Si existe material para solicitud se procede a la preparación de material b. Si no existe material queda en estatus pausado y envía notificación a equipo de validación. 5. Se genera preparación de materiales con las etiquetas impresas en punto 3...

    $30832 (Avg Bid)
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    14 bids

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