Kotlin Developers For Hire
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Hire kareemmaize
Great software starts with more than good code. It takes the right architecture, clear technical decisions, and someone who can carry the product from idea to production without losing sight of the business goal. I’m a Senior Full-Stack & AI Engineer with 10+ years of experience building complex web platforms, mobile...Great software starts with more than good code. It takes the right architecture, clear technical decisions, and someone who can carry the product from idea to production without losing sight of the business goal. I’m a Senior Full-Stack & AI Engineer with 10+ years of experience building complex web platforms, mobile applications, AI-powered products, enterprise systems, and connected-device solutions. Core Expertise: React / Next.js, Node.js / NestJS, Python / FastAPI, .NET, Laravel, Flutter, React Native, Kotlin | AI / LLM / RAG | SaaS Platforms | Cloud Architecture | Embedded & IoT | ESP32, Arduino, BLE / GATT, MQTT What I Can Build: ✅ AI & Intelligent Automation LLM-powered applications, RAG systems, AI assistants, document processing, workflow automation, predictive solutions, and AI integrations ✅ SaaS & Full-Stack Platforms Marketplaces, subscription platforms, payment systems, dashboards, admin portals, role-based applications, and real-time products ✅ Mobile Applications iOS and Android apps, Flutter, React Native, native Android, BLE-connected apps, subscriptions, in-app purchases, and store release support ✅ Embedded & IoT Solutions ESP32, Arduino, BLE/GATT, MQTT, sensors, firmware integration, device control, telemetry, OTA workflows, and device-to-cloud systems ✅ Enterprise & Third-Party Integrations ERP/CRM integrations, SharePoint, NetSuite, Stripe, Supabase, APIs, automation platforms, cloud services, and custom business workflows ✅ Production Engineering Existing codebase audits, architecture improvements, performance optimization, security hardening, deployment, release issues, and complex debugging How I Work I take ownership of the technical side of a project, communicate clearly, and focus on building solutions that are reliable, maintainable, and ready for real users. Whether you’re starting with an idea, scaling an existing product, or dealing with a system that needs experienced technical direction, I can step in and move it forward. If you’re looking for an engineer who can understand the bigger picture, handle the difficult technical details, and deliver with confidence, send me your project requirements and let’s build it the right way. less -
Hire EngrAamirKamal
EngrAamirKamal EngrAamirKamal
$40 USD / hour
AI Chatbots, RAG & Automation | Web & Mobile AppsPakistan334 five-star reviews · 98% on time and on budget · Preferred Freelancer since 2015. AXCEL builds AI chatbots, RAG systems and workflow automations, along with the web and mobile apps around them, so you get a working product, not a demo. WHAT WE BUILD 🤖 AI & Automation • Chatbots and agents on GPT, Claude and...334 five-star reviews · 98% on time and on budget · Preferred Freelancer since 2015. AXCEL builds AI chatbots, RAG systems and workflow automations, along with the web and mobile apps around them, so you get a working product, not a demo. WHAT WE BUILD 🤖 AI & Automation • Chatbots and agents on GPT, Claude and Gemini for support, sales and lead qualification • RAG over your documents, website, database and product catalog • WhatsApp, Slack and website assistants with CRM and helpdesk hand-off • n8n, Make and Zapier workflows that remove manual, repetitive work 🌐 Web Applications • Laravel, PHP, WordPress and WooCommerce: portals, SaaS, plugins, stores • React, Next.js and Node.js: dashboards, marketplaces, subscription platforms • Stripe, HubSpot, Zoho, Salesforce and custom API integrations 📱 Mobile Apps • Flutter and React Native for iOS and Android, plus native Kotlin and Swift • AI chat, voice, maps, payments and push notifications • App Store and Google Play release and maintenance ☁️ Cloud & DevOps • AWS, Google Cloud, DigitalOcean, Vercel, Docker and CI/CD RECENT WORK • WhatsApp AI sales agent answering customers 24/7 in Urdu and English • HayRoutes: AI driving-route training and exam app (Flutter, Gemini) • JARVIC: voice-controlled desktop agent with 100+ automation tools • RAG chatbot across web, WhatsApp and Slack with CRM integration HOW WE WORK 1. You share the workflow or idea 2. We reply with architecture, scope, timeline and a fixed quote 3. Milestone delivery with weekly demos, and you own the source code 4. Post-launch support and maintenance plans Message us with what you want to automate or build and you'll get a practical plan, not a sales pitch. less -
Hire rizzikhan175
I am a Senior Full Stack Developer with 9+ years of experience helping startups and businesses build scalable web and mobile applications. I specialize in developing end-to-end solutions using Flutter, React Native, Node.js, Laravel, Firebase, and Supabase. Whether it’s an MVP or a full production system, I focus on...I am a Senior Full Stack Developer with 9+ years of experience helping startups and businesses build scalable web and mobile applications. I specialize in developing end-to-end solutions using Flutter, React Native, Node.js, Laravel, Firebase, and Supabase. Whether it’s an MVP or a full production system, I focus on clean architecture, performance, and long-term scalability. I have delivered solutions across multiple domains, including: Real-time applications (live tracking, chat, notifications) E-commerce and marketplace platforms POS-integrated systems and admin dashboards Payment integrations (Stripe, PayPal, subscriptions) Map-based and location-aware applications I focus on more than just development — I help turn your idea into a reliable, scalable product that works smoothly in real-world conditions. ✔ Clean, maintainable, and well-documented code ✔ Fast communication and regular progress updates ✔ On-time delivery with attention to detail ✔ Long-term support and bug fixing If you need a developer who understands both technical execution and business needs, feel free to reach out — I’d be happy to discuss your project. less -
Hire saweratauqeer
At WeblyStudio, we are a dynamic team of skilled professionals specializing in a wide range of creative and technical disciplines. With our diverse expertise, we provide innovative design and content solutions tailored to our clients' specific needs. Our skill set includes: • React, Vue.js, Next.js, Nuxt.js for...At WeblyStudio, we are a dynamic team of skilled professionals specializing in a wide range of creative and technical disciplines. With our diverse expertise, we provide innovative design and content solutions tailored to our clients' specific needs. Our skill set includes: • React, Vue.js, Next.js, Nuxt.js for cutting-edge web development • Redux for state management • Firebase for seamless integration and real-time updates • Laravel and PHP for robust backend development • CSS3, HTML5, and JavaScript for captivating and interactive user experiences • Branding & Identity Design to create a compelling visual presence • Graphic Design for eye-catching marketing materials • Video Production & Animation to tell engaging stories • Content Creation & Copywriting for persuasive messaging • Marketing & Advertising Strategy for effective campaigns • User Experience (UX) & User Interface (UI) Design for intuitive and engaging interfaces Our unwavering commitment to excellence ensures that we deliver exceptional results. We prioritize close collaboration with our clients, listening attentively and adapting our approach to exceed expectations. As your reliable partner, we are invested in your success and dedicated to creating work that both you and we can take pride in. Choose WeblyStudio for your next project and unlock the potential of a committed and versatile creative powerhouse. Together, let's bring your brand's vision to life. less -
Hire manh2906
Got a business idea? Let’s turn it into a live solution. I have high experience to build modern websites, web apps, mobile apps, landing pages, AI solutions, and SEO-friendly digital products. From idea to launch, I keep things simple, practical, and user-focused. Have an idea in mind? Let’s make it happen.Got a business idea? Let’s turn it into a live solution. I have high experience to build modern websites, web apps, mobile apps, landing pages, AI solutions, and SEO-friendly digital products. From idea to launch, I keep things simple, practical, and user-focused. Have an idea in mind? Let’s make it happen. less -
Hire Sjtsresth
Exceeding expectations. Building products that move businesses forward. As I'm a senior software engineer, I led a full-stack software engineering team focused on delivering scalable, high-performance digital products across web, mobile, cloud, AI, and automation platforms. I help startups, growing businesses, and...Exceeding expectations. Building products that move businesses forward. As I'm a senior software engineer, I led a full-stack software engineering team focused on delivering scalable, high-performance digital products across web, mobile, cloud, AI, and automation platforms. I help startups, growing businesses, and product teams design, build, and scale production-ready applications with modern architecture and practical AI integration. With 7+ years of hands-on engineering experience and a broader team with 10+ years delivering digital products, we build software that is scalable, maintainable, secure, and aligned with business outcomes from day one. From architecture and MVP development to deployment and long-term scaling, we focus on turning ideas into reliable products that improve operations, automate workflows, and create better user experiences. What We Deliver AI-powered business automation and workflow systems Custom web applications and SaaS platforms Cross-platform mobile applications Scalable backend systems, APIs, and cloud architecture E-commerce solutions with Shopify, BigCommerce, WooCommerce, and Magento Product optimization, testing, monitoring, and CI/CD UI/UX-focused product development Blockchain and dApp product development AI & Automation Expertise I specialize in applying AI where it creates measurable product value: Intelligent workflow automation LLM-powered assistants and conversational systems Recommendation engines and personalization Predictive analytics and data-driven product features Integration with OpenAI APIs and custom ML services End-to-end AI pipelines from data processing to deployment Core Strengths End-to-end ownership From product planning and system architecture to deployment and scaling. Scalable architecture Built for performance, maintainability, and long-term growth. Business-first engineering Technology choices focused on speed, cost-efficiency, and product outcomes. Reliable execution Clear communication, clean code, and practical delivery. If you need a software engineer that can architect, build, and scale modern digital products — while integrating practical AI capabilities where they create real business value — I'm ready to help. Thanks less -
Hire Smart1902
Need a production-ready mobile or web app delivered fast without quality compromises? With 13+ years of full-stack engineering experience, I specialise in building cross-platform mobile applications and modern web systems. I have published over 180+ live applications to the Apple App Store and Google Play...Need a production-ready mobile or web app delivered fast without quality compromises? With 13+ years of full-stack engineering experience, I specialise in building cross-platform mobile applications and modern web systems. I have published over 180+ live applications to the Apple App Store and Google Play Store. Core Specialties: Mobile Development: Flutter (Dart), React Native, Native Android (Kotlin/Java), iOS (Swift) Web & Full-Stack: React.js, Node.js, MERN Stack, PHP/Laravel, Python, REST/GraphQL APIs Figma to Code: Converting complex Figma/Adobe XD designs into pixel-perfect Flutter UI Maintenance & Fixes: Bug fixing, API integrations, and app performance optimization Why Clients Choose Me: Proven Track Record: 180+ completed apps with a 97%+ budget adherence rate. Fast Turnaround: Immediate project start with proactive, daily communication. Code Quality: Clean architecture, clean Git commit history, and scalable code structures. Have a project or an urgent bug fix? Send a message and let's discuss your requirements. less -
Hire diegovisiso
I turn your idea into a clean, reliable mobile app — built right the first time. I'm a Computer Science graduate specializing in Android development. I build native Android apps with Kotlin and Java, and cross-platform apps with Flutter and React Native, handling everything from UI and navigation to databases and...I turn your idea into a clean, reliable mobile app — built right the first time. I'm a Computer Science graduate specializing in Android development. I build native Android apps with Kotlin and Java, and cross-platform apps with Flutter and React Native, handling everything from UI and navigation to databases and Firebase integration. What I can build for you: ✔ Native Android apps (Kotlin / Java) ✔ Cross-platform apps (Flutter, React Native) ✔ Firebase integration — authentication, real-time database, cloud storage, notifications ✔ Database design and integration (SQLite, MySQL) ✔ Bug fixes and improvements for existing Android apps Why work with me: ✔ Clean, scalable code using modern Android practices (OOP, View Binding, Navigation Components) ✔ Clear communication and honest timelines — you'll always know where your project stands ✔ Careful testing before every delivery Before moving into development, I worked in IT support and network analysis, so I know how to listen to what users actually need, solve problems under pressure, and explain technical things in plain language. Native Portuguese speaker — happy to work with clients in Portuguese or English. Send me a message about your project and I'll get back to you quickly. Let's build something great. less -
Hire rohank2502
I build with AI, end to end: products, agents, automations, data systems, audio and video pipelines. If it can be built with software, I can ship it, and fast, because I run AI systems in production every day. Recently shipped, all real and verifiable: desktop OCR software for scanned books, delivered to a paying...I build with AI, end to end: products, agents, automations, data systems, audio and video pipelines. If it can be built with software, I can ship it, and fast, because I run AI systems in production every day. Recently shipped, all real and verifiable: desktop OCR software for scanned books, delivered to a paying client and stress-tested on 2,000 pages (5.0 review). Audiobook production with author voice cloning and mastered narration. WhatsApp commerce campaigns for a D2C brand: broadcasts, deliverability repair, revenue-leak analysis. Cold email infrastructure with verified lists, SPF/DKIM/DMARC and warmup, my own campaigns measure 59% opens. A macOS dictation app I designed and built solo. Nine production systems running 24/7 on Cloudflare with crons, webhooks and dashboards. What I ship fast: custom AI agents (research, outreach, support, ops), workflow automation (n8n, Make, Zapier, custom), LLM integrations (OpenAI, Anthropic, OpenRouter), RAG and semantic pipelines, MCP servers, data extraction and enrichment, HubSpot/Salesforce/Apollo automation, web apps and dashboards (Next.js, FastAPI, Cloudflare, Supabase), audio/video AI (TTS, voice cloning, transcription). Background: 18 months as founding engineer at bhindi.ai ($4M raised), shipping production agentic systems. How I work: fixed scope, fast first deliverable, usually same day you unblock me. Honest about what I have not done before. I would rather show you a working sample than a portfolio promise. less -
Hire johnnier3
Hi, I'm Johnnie Reece, a Preferred Freelancer and senior full-stack engineer. For 10+ years I've shipped web, mobile, and emerging tech for startups and Fortune 500 companies, on time and without surprises. What I build: - Pixel-perfect web and mobile apps (React, Next.js, React Native, Flutter) scoring 98-100 on...Hi, I'm Johnnie Reece, a Preferred Freelancer and senior full-stack engineer. For 10+ years I've shipped web, mobile, and emerging tech for startups and Fortune 500 companies, on time and without surprises. What I build: - Pixel-perfect web and mobile apps (React, Next.js, React Native, Flutter) scoring 98-100 on Lighthouse - Secure, scalable backends in Node.js/NestJS, Java/Spring Boot, .NET, and Python - High-performance Shopify and WordPress stores, custom apps, and headless setups - Blockchain dApps, smart contracts, and Web3 integrations - Automation bots, scrapers, and AI workflows - AWS infrastructure with 99.99%+ uptime and auto-scaling How I work: Daily updates, live demos, direct access (no middlemen). I act as your technical partner, flagging risks early and writing clean, documented code built to last. Clients come back because I ship faster, cleaner, and more reliably. Ready to start? Message me. I reply fast and can begin immediately. less
