Hire the Best Firebase Developers
in the United Kingdom

More than 3,000 reviews on G2
Rating is 4.5 out of 5.
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Wahaab Daadh A.

Bradford, United Kingdom

$30/hr
5.0
14 jobs

I build AI-powered web applications, intelligent automation systems, and modern full-stack solutions that help businesses save time, automate workflows, and deliver better user experiences. I specialize in developing scalable applications using modern frontend and backend technologies while integrating advanced AI capabilities and business automation. What I Can Build • AI SaaS Applications • AI Chatbots (OpenAI, Claude, Gemini) • AI Agents & Multi-Agent Workflows • RAG (Retrieval-Augmented Generation) Systems • Business Process Automation • CRM & API Integrations • Custom Dashboards & Admin Panels • Internal Business Tools • Document Processing & AI Search • Workflow Automation with n8n Frontend React.js Next.js TypeScript JavaScript Tailwind CSS Shadcn UI Material UI Responsive UI/UX Backend Node.js Express.js FastAPI REST APIs Authentication PostgreSQL MongoDB Supabase Firebase AI & Automation OpenAI API Anthropic Claude Google Gemini LangChain LangGraph Vector Databases RAG Applications AI Agents Prompt Engineering n8n Automation Webhooks API Integrations Cloud & DevOps Docker Vercel Git GitHub CI/CD I focus on writing clean, maintainable code and building scalable solutions that are production-ready. Whether you need a modern web application, an AI-powered product, or an automation workflow, I can help turn your ideas into reliable software. If you're looking for an AI Full-Stack Developer who can combine frontend, backend, AI, and automation into a complete solution, I'd be happy to discuss your project.

  • AI Development
  • Artificial Intelligence
  • AI Chatbot
  • OpenAI API
  • React
  • Next.js
  • MERN Stack
  • Node.js
  • ExpressJS
  • MongoDB
  • Supabase
  • PostgreSQL
  • TypeScript
  • JavaScript
  • FastAPI
  • REST API
  • n8n
  • Automation
  • LangChain
  • Docker
Syed A.

London, United Kingdom

$20/hr
4.9
14 jobs

Top Rated Flutter developer based in London. I build AI-powered iOS and Android apps from first commit to App Store approval. 13 projects delivered on Upwork with 10 client reviews and a Top Rated badge. Most clients come to me with one of three problems: - "We have an AI idea and no mobile app." I build the Flutter app around it chat interfaces, streaming responses, image/audio input, API integration with OpenAI, Gemini, or your own model endpoint. - "Our app works but it's slow, unstable, or stuck in review." I diagnose it, fix it, and get it shipped. I've rescued codebases I didn't write. - "We need this built properly the first time." Clean architecture, real state management, and code your next developer won't curse at. TECH STACK Flutter, Dart • Firebase (Auth, Firestore, Storage, Realtime DB, Cloud Functions) • AI/LLM API integration • REST & GraphQL APIs • Riverpod, Bloc, Provider • Google Maps & geolocation • Stripe & payment gateways - Push notifications • Native Swift & Kotlin • App Store and Play Store submission HOW I WORK You get a written plan before I start, working builds you can install and test as I go, and a reply within a few hours during UK business hours. I'm in London (UTC+1), which overlaps the US East Coast morning and all of Europe. I currently have capacity for one new project. Send me a message with what you're building and I'll tell you honestly whether I'm the right fit and roughly what it should cost.

  • Firebase
  • Hybrid App Development
  • Dart
  • Flutter
  • Android App Development
  • API Integration
  • iOS Development
  • iOS
  • Mobile App Redesign
  • Mobile App
  • Mobile App Design
  • Mobile UI Design
  • App Development
  • Payment Gateway Integration
  • Flutter Stack
Johnson A.

Liverpool, United Kingdom

$40/hr
5.0
5 jobs

AI Developer & SaaS Architect | Full Stack Developer focused on building AI solutions & SaaS MVPs. I have strong skills as a Senior Software Engineer, Nodejs, Nestjs FastAPI Developer, and React Developer. I help founders, startups, and small businesses build practical AI-powered web applications, SaaS MVPs, automation tools, and full-stack products using Nodejs, Python, React, Next.js, FastAPI, Nest.js, and modern AI APIs. I may be new to Upwork, but I am not new to building. I have hands-on experience developing full-stack applications, AI-assisted workflows, dashboards, backend APIs, and production-minded web platforms. My focus is simple, understand your idea clearly, build the right first version, and help you move from concept to a working product. What I Do I can help you with SaaS MVP development from idea to launch AI app development and AI API integration OpenAI, LangChain, RAG, chatbot, and agent-style workflows Full-stack web apps using React, Next.js, Python, FastAPI, Node.js, and Supabase Backend APIs, dashboards, authentication, databases, and deployment Automation tools that save time and reduce manual work Clean frontend interfaces with responsive UI and modern UX AI & SaaS Development I build AI-powered software that is useful, not just flashy. Whether you need a chatbot, document workflow, internal tool, AI assistant, or SaaS dashboard, I can help design and develop the product end-to-end. Areas I work with include OpenAI API and LLM integrations RAG pipelines and document-based AI assistants AI automation and workflow tools SaaS dashboards and admin panels Multi-user web applications Authentication, roles, and database-backed systems API design and backend logic Full Stack Development I work across the frontend, backend, database, and deployment layers, which means you do not need to manage multiple developers for an MVP. My core stack includes Frontend: React, Next.js, JavaScript, TypeScript, Tailwind CSS Backend: Python, FastAPI, Django, Node.js Databases: PostgreSQL, Supabase, Redis, Firebase AI Tools: OpenAI, LangChain, vector databases, prompt engineering Deployment: Vercel, Docker, cloud platforms, CI/CD basics Other: REST APIs, GraphQL, WebSockets, SaaS architecture How I Work I work best with clients who want clear communication and steady execution. I can help you shape the product, choose the right tech stack, avoid unnecessary complexity, and build something that can grow beyond the first version. My approach is Clear scoping before development starts Fast MVP delivery with clean architecture Regular updates and honest communication Practical technical decisions Code that is maintainable and easy to extend A product-focused mindset, not just task completion Why Work With Me Because I care about the result, not just the code. I think like a technical partner, I ask the right questions, suggest better options when needed, and focus on helping you get a working product into users’ hands. I am especially a good fit if you need An AI developer who also understands full-stack product development A web developer who can build both frontend and backend A Python/React developer for SaaS, dashboards, and automation Someone who can turn a rough idea into a real working MVP Background I have a strong background in AI, data science, and full-stack software development, with experience building real-world projects across web applications, AI tools, automation systems, and SaaS-style platforms. I am continuously improving my craft and using modern AI-assisted development tools to work faster while keeping quality high. Let’s Work Together If you are building an AI product, SaaS MVP, automation tool, dashboard, or full-stack web application, send me a message. I would be happy to understand your idea and help you turn it into a working product.

  • Agile Software Development
  • Software Development
  • Node.js
  • Python
  • Machine Learning
  • Data Analysis
  • TensorFlow
  • PyTorch
  • Data Science
  • Next.js
  • React
  • Angular
  • LLM Prompt Engineering
  • Vue.js
  • TypeScript
  • .NET Framework
  • C#
  • Artificial Intelligence
  • Web3
Shahab M.

Oldham, United Kingdom

$20/hr
5.0
6 jobs

Top 1% Mobile App Developer on Upwork | Flutter, iOS & Android | AI-Powered Apps | 100% Job Success Tired of mobile apps that crash under real users, or developers who disappear mid-project? I have solved that exact problem for 60+ founders and businesses. My clients launch apps that hold up on Day One, clean Flutter/native code, App Store & Google Play ready, and AI features that actually work. 100% Job Success, Top Rated, 9+ years of experience, 30+ apps live in the market. 🎯 WHAT I BUILD ▸ FULL-CYCLE MOBILE APP DEVELOPMENT From idea to App Store/Play Store launch. Flutter, Android, and iOS apps built for real users from day one. ▸ CROSS-PLATFORM APPS (FLUTTER + REACT NATIVE) One codebase, native performance on both iOS and Android. Faster delivery without sacrificing quality. ▸ NATIVE ANDROID & iOS DEVELOPMENT Platform-specific builds when performance or deep OS integration matters most. ▸ AI-POWERED MOBILE APPS OpenAI API integration for smart features chat, recommendations, automation implemented cleanly, no over-engineering. ▸ ON-DEMAND & MARKETPLACE APPS Ride booking, food delivery, real estate listing, e-commerce Uber/Airbnb-style apps built end-to-end. ▸ BACKEND & API DEVELOPMENT Node.js, Python (FastAPI/Flask/Django), REST & GraphQL APIs, connected to Firebase, MySQL, MongoDB, or your stack of choice. ▸ CODE AUDIT & APP STABILIZATION Inherited a buggy app? I audit performance, crashes, and architecture, then deliver a fix plan fast. 💬 CLIENT FEEDBACK Review 1: Great experience working with Shahab Malik on our mobile app project. He's skilled in Flutter, Dart, Node.js, and API Integration, and delivered clean, functional code on time. Communication was smooth, and he was open to feedback. Highly recommended for Mobile App Development. Review 2: Shahab Malik is professional and responsive, with strong skills in Cross Platform and iOS/Android App Development using Flutter. He delivered a well-designed app with smooth UI and RESTful API integration, even adding some AI features. 🏆 CREDENTIALS - Top 1% Talent on Upwork Mobile App Development - 100% Job Success, 60+ Projects Delivered - 30+ Apps Live on App Store & Google Play - 9+ Years of Experience - AI Mobile App Development (OpenAI Integration) 🚀 HOW WE START ✉️ MESSAGE ME ON UPWORK Have a mobile app idea, or an existing app that needs fixing? Message me for a free consultation and a clear plan to launch faster. How I Work Full-cycle mobile apps in Flutter, Android, iOS, with clean backend and API integration. Figma designs turned into pixel-perfect UI, progress tracked in Jira/Trello, communication through clear updates, and delivery with long-term support after launch. 🛠️ TOOLS & TECHNOLOGY Mobile Development Flutter, Dart, React Native, Android (Kotlin/Java), iOS (Swift) Backend & Databases Node.js, Python (FastAPI, Flask, Django), Firebase, Firestore, MySQL, MongoDB, SQLite APIs & Integrations REST API, GraphQL, OpenAI API, Firebase Cloud Functions Cloud & Deployment AWS, Google Cloud, Firebase Design & Collaboration Figma, Adobe XD, Material Design, Cupertino Widgets, Git, GitHub, GitLab, Bitbucket, Jira, Trello Solutions Delivered Ride/Booking Apps, Real Estate Apps, Social Media Apps, Sports Apps, Food Delivery Apps, E-commerce Apps, Learning Management Apps, Appointment Booking Apps, CRMs, On-demand Apps Mobile App Developer, Flutter Developer, iOS Developer, Android Developer, AI Mobile App Development, Cross-Platform App Development Keywords: Flutter, Dart, OpenAI API, Full Stack Developer, Back End Developer, API Integration, Node.js, SQL, Mobile App Development, Mobile App Developer, Android App Development, Android App Developer, AI Mobile App Development, AI Mobile App Developer, Mobile App Design, Mobile App UI Design, Responsive Design, UI/UX Designer, Prototyping, Mobile App API Integration, iOS App Developer, iOS App Development, Hybrid App Development, Cross Platform App Development, Express.js, RESTful API, Machine Learning App Integration, Senior Mobile App Developer, Software Designer #Flutter #Dart #OpenAIAPI #FullStackDeveloper #BackEndDeveloper #APIIntegration #Nodejs #SQL #MobileAppDevelopment #MobileAppDeveloper #AndroidAppDevelopment #AndroidAppDeveloper #AIMobileAppDevelopment #AIMobileAppDeveloper #MobileAppDesign #MobileAppUIDesign #ResponsiveDesign #UIUXDesigner #Prototyping #MobileAppAPIIntegration #iOSAppDeveloper #iOSAppDevelopment #HybridAppDevelopment #CrossPlatformAppDevelopment #Expressjs #RESTfulAPI #MachineLearningAppIntegration #SeniorMobileAppDeveloper #SoftwareDesigner

  • Firebase
  • Mobile App Development
  • AI Mobile App Development
  • Android App Development
  • iOS Development
  • Hybrid App Development
  • Website to Mobile App Conversion
  • Mobile App Design
  • Mobile App Redesign
  • Mobile UI Design
  • Mobile App Bug Fix
  • Mobile App Testing
  • Back-End Development
  • Flutter
  • Node.js
  • ExpressJS
  • Dart
  • Supabase
  • API Integration
  • REST API
Boyan P.

Heckmondwike, United Kingdom

$40/hr
5.0
2 jobs

I build and fix mobile apps in Flutter and web apps & APIs in .NET — production software that businesses actually depend on. For the last 4 years my day job has been a Flutter app used every day by thousands of field crews across UK local government, so I'm used to the conditions real apps face: patchy signal, offline data, device hardware, real deadlines and code that can't fall over. What I can help with: • Flutter (iOS & Android) — new apps, features, bug fixes, refactors and upgrades • Firebase & Supabase — authentication, Firestore, storage • Offline-first sync and hardware integrations: GPS, camera, Bluetooth • Web apps & APIs in C#/.NET (ASP.NET Core, Blazor) with React front-ends • SQL / MSSQL design and optimisation, plus third-party API integrations • WordPress, WooCommerce and Shopify — fixes, customisations and maintenance 8+ years' experience, a First Class BSc in Software & Development, and recent professional certifications in advanced C#/.NET and application security. I'm a great fit for part-time, ongoing or project-based work — small builds, bug fixes and retainers. Tell me what you need and I'll give you an honest estimate and keep you updated throughout.

  • Firebase
  • Flutter
  • Dart
  • Mobile App Development
  • iOS Development
  • Supabase
  • SQL
  • REST API
  • C#
  • .NET Core
  • Blazor
  • Microsoft SQL Server
  • JavaScript
  • React
  • Shopify
  • TypeScript
  • Tailwind CSS
  • AI Implementation
  • Syncfusion
  • Telerik
Awais A.

Barking, United Kingdom

$20/hr
5.0
45 jobs

🚀 𝗔𝗩𝗔𝗜𝗟𝗔𝗕𝗟𝗘 𝗧𝗢 𝗦𝗧𝗔𝗥𝗧 𝗧𝗢𝗗𝗔𝗬! 🔝Top 1% Talent on Upwork⚡️Updated daily ⚡️Fast task completion ⚡️Flexible work schedule ⚡️High-quality results ⚡️Increase in conversion 🥇 7-Years of experience as React, Next.js React Native & Expo App Dev As a successful team leader, I'm providing my technical and management skills to my team members wherever needed. I build 50+ high-performance React Native mobile apps for iOS and Android and production-ready 100+ web applications using React, Next.js, Vue.js, Angular TypeScript, and JavaScript, backed by scalable Node.js, AWS, and Python APIs and cloud infrastructure. Over the past 7+ years I have worked on apps that include: -AI-powered mobile and web applications using OpenAI, Gemini, and LLM APIs -Real-time apps with WebRTC, push notifications, and live updates -Scalable backend systems with Node.js, Express.js, AWS, RESTful API, and PostgreSQL -Secure authentication and KYC integrations (Clerk, Jumio, Onfido) -Payment systems with Stripe and subscription models -Mapping, location services, and logistics platforms using Google Maps & Mapbox -Responsive web dashboards, admin panels, and SaaS platforms using React, & Next.js, Vue. -SEO-optimized landing pages and marketing sites with Next.js and TypeScript No‑code / AI‑assisted app: I transform prototypes from Base44, Bubble, FlutterFlow, Adalo, AppyPie, Glide, and Zite into fully native Android and iOS apps or high-performance web applications with push notifications, Stripe payments, API integrations, and a serverless backend. Ready for launch in just 10 days. My skills set: Mobile: React Native, iOS, Android Frontend: React, Next.js, Vue, Angular, TypeScript, Tailwind CSS Backend: Node.js, Express, AWS, Python, RESTful API Databases: PostgreSQL, MongoDB, Supabase, Firebase, Redis AI & ML: OpenAI API, Gemini, Anthropic, TensorFlow, Vector DBs (Pinecone, Weaviate, Qdrant) Cloud & Tools: AWS, Vercel, GitHub, CI/CD I believe myself quite an expert in programming, and I learn things very quickly. If you're building a mobile app, web platform, AI product, SaaS platform, or scalable backend, I can help you move from idea to production. Send me a message and Let's discuss how I can contribute to your project. GitHub: Awais-514

  • Firebase
  • Mobile App Development
  • React Native
  • Node.js
  • Web Development
  • React
  • Next.js
  • API Integration
  • AI App Development
  • ChatGPT API Integration
  • JavaScript
  • RESTful API
  • Supabase
  • User Authentication
  • CI/CD
  • Python
  • Stripe API
  • AWS Lambda
  • Amazon Web Services
  • Full-Stack Development

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