Hire the Best AWS AppSync Developers
in the United Kingdom

Built your app with Cursor, Claude Code, Lovable or Bolt and it got 70% of the way there? I'm the engineer who takes it the rest and the one who ships AI agents and LLM features inside real Next.js and React products, on AWS, that hold up with real users. 8 years, 4,500+ hours on Upwork, 100% Job Success, based in the UK. Here's what usually happens: the AI-generated version works on your laptop, then real users hit it and auth breaks, the LLM feature starts making things up, there's no deploy pipeline, and nobody can tell which parts are safe to keep. I read that code for a living. I use the same tools daily, so I know exactly what they get right and where they quietly cut corners. WHAT I BUILD: 1. Next.js and React products, end to end App Router, SSR/SSG, TypeScript, Tailwind, with NestJS or Node behind it over GraphQL, PostgreSQL and Redis/BullMQ queues. Tested with Jest, Cypress and Playwright, shipped through GitHub Actions to Vercel or AWS. 2. AI agents and LLM features inside those products Claude API and OpenAI pipelines, agents with tool use and decision logs, RAG over your own data (pgvector / Supabase), structured prompt chains, evaluation harnesses and guardrails, streaming UIs. Shipped, measured, monitored. 3. AWS serverless backends and DevOps Lambda, AppSync, DynamoDB, RDS, API Gateway, Cognito, S3, defined in CloudFormation or Terraform. Built for cost as well as load; I do architecture and bill audits as standalone engagements. WHAT I FIX: 1. AI-built apps that aren't shippable: broken auth, no error handling, secrets in the client, no tests, no CI/CD, schemas that won't survive month two. You get a written verdict keep, fix, or replace before you spend on the fix. 2. LLM features that work in a demo and fail in production: hallucination, no evaluation, runaway API cost, retrieval that returns the wrong chunk. PROOF: 1. AI phonics assessment platform, live for a UK education provider Next.js and TypeScript with Claude API scoring behind structured prompt pipelines, where a wrong answer means a child gets the wrong assessment. Supabase auth with row-level security. 2. Multi-role education platform React and Next.js on the front, NestJS and PostgreSQL on AWS behind it, role-based access control, Cypress coverage on every critical journey. 3. Serverless procurement marketplace React front end over Lambda, AppSync and DynamoDB, defined end to end in CloudFormation, monitored in CloudWatch. HOW I WORK: Written plan before code. A link you can click by end of week one. A message when something changes, not silence then a surprise. Handover docs included. I don't disappear mid-contract 4,500+ hours on this platform says so. NOT A FIT IF: You need a $15/hr pair of hands, a one-hour "quick fix" on a codebase I've never seen, or a chatbot demo with no path to production. Send the repo or a two-line description of what's broken and I'll tell you what I'd do and what it costs before you spend anything.

I build production-ready mobile apps and backend systems that are clean, scalable, and easy to maintain. I'm a Full-Stack Engineer with 4+ years of experience delivering Flutter apps and Python (FastAPI) APIs used in production. I help founders and teams ship reliable software, not fragile prototypes. Services Flutter (iOS & Android) Pixel-perfect UI, responsive layouts, animations, state management (Riverpod/Bloc), offline support, and real-time features. Python / FastAPI Secure REST APIs, auth (JWT/OAuth), background tasks, pagination, rate-limiting, and third-party integrations. ETL & Integrations API ingestion, data cleaning/validation, and structured exports (JSON/CSV). Why Clients Hire Me - Apps that feel polished and production-ready - Backends that scale and are easy to maintain - Clear communication and predictable delivery How I Work Clear communication, short feedback loops, clean code, and proper handover documentation. Tech Stack Flutter · Dart · Python (FastAPI) · PostgreSQL · MongoDB · Docker · Firebase · CI/CD

🌟 Expert Mobile App & Web Developer | iOS, Android, Flutter, Laravel | 10+ Years of Proven Success 🌟 Hello! I’m a seasoned mobile and web developer with over a decade of expertise in crafting high-performance applications and websites that deliver exceptional user experiences. Specializing in iOS, Android, Flutter, and Laravel, I build scalable, maintainable solutions that drive growth and engagement for clients worldwide. What sets me apart? - Full-Stack Capability: Skilled in both frontend and backend development, I handle the full cycle of web and mobile projects, from UI/UX to server-side logic, database design, and seamless API integrations. - Clean, Flexible Code: Known for writing testable, modular code, I adhere to SOLID principles and industry best practices, ensuring efficient, maintainable, and robust applications. - Cross-Platform Expertise: Experienced in creating hybrid and native mobile solutions, as well as feature-rich websites, I bring versatility and depth to every project. Technical Skills: - Mobile Development: Native Android development, Native iOS development, Hybrid app development, Swift, SwiftUI, UIKit, Combine, Java, Kotlin, Flutter, Dart - Web Development: Laravel, PHP, HTML, CSS, JavaScript, Vue.js - Backend & API Integration: RESTful APIs, GraphQL (Apollo, AWS AppSync), Firebase, AWS, MySQL - Database & Server Management: MySQL, MongoDB, AWS, DigitalOcean - Payment Integration: Stripe, Apple Pay, Google Pay, PayPal, In-app purchases - CI/CD & Testing: AppCenter, PHPUnit, TDD, XCTest, unit and integration testing - Tools & Collaboration: Git, Jira, Postman, Figma, Charles, Proxymen I am dedicated to understanding your business needs and delivering tailored solutions that captivate users and drive success. Whether you're looking for a powerful mobile app, a dynamic website, or a robust backend, let's connect and bring your project vision to life!

Over 20 years of experience in tech. My most recent work: - ETL to upload Excel Financial Reports, then process and consolidate them into fit for purpose regulatory reports. - IoT Data Ingestion into S3, then process the data using event driven architecture in AWS, finally creating emailed reports to send to users. - SaaS platform that I built and own called Nopaque. Automates the testing of organisations telephony services, by mapping journeys, testing paths and performing function/load tests. - RantClub, a small experiment and fun website to showcase Deepgrams APIs and how they can be used to classify and summarise transcripts. Before this most recent work (last 2 years). I was the Director of Engineering for over 100 staff and remained hands on 'in the moment'. Prior to this, I was a CTO that lead a team of about 60 and had influence over the wider organisation. I participated in multiple MVP builds, two of which eventually went on to become offerings that increased our company value by over 60% before sale. - The first was engineering and delivery of Amazon Connect, with utilities/tools that we could drop in and accelerate adoption of the technology. In this role I worked with 3 large UK banks. - The second was our approach to MLOps - in which we were able to begin the journey for a major UK bank who are now considered one of the leaders in this space. During and prior to this, I was a full time Cloud Architect/Engineer - having held all 5 core AWS exams between 2016 - 2020.