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Hi, I’m Jack Foxcroft, a Senior Full-Stack Engineer based in Bristol, UK. I specialise in TypeScript/JavaScript, Python (Django, Flask, FastAPI), and React (React Native, Svelte, Next.js), with hands-on experience across Azure and AWS. I design scalable, type-safe frontend architectures and AI-enabled features that improve performance, engagement, and business outcomes. I’m passionate about AI-driven UX, LangChain/LangGraph workflows, RAG, vector databases, and real-time, cross-platform experiences. I enjoy turning complex problems into intuitive products, collaborating with cross-functional teams, and delivering robust systems from architecture to production.…Hi, I’m Jack Foxcroft, a Senior Full-Stack Engineer based in Bristol, UK. I specialise in TypeScript/JavaScript, Python (Django, Flask, FastAPI), and React (React Native, Svelte, Next.js), with hands-on experience across Azure and AWS. I design scalable, type-safe frontend architectures and AI-enabled features that improve performance, engagement, and business outcomes. I’m passionate about AI-driven UX, LangChain/LangGraph workflows, RAG, vector databases, and real-time, cross-platform experiences. I enjoy turning complex problems into intuitive products, collaborating with cross-functional teams, and delivering robust systems from architecture to production.

Jack Foxcroft

Full Stack Developer, Front-End Developer, Web Developer, +3

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Hi, I’m Jack Foxcroft, a Senior Full-Stack Engineer based in Bristol, UK. I specialise in TypeScript/JavaScript, Python (Django, Flask, FastAPI), and React (React Native, Svelte, Next.js), with hands-on experience across Azure and AWS. I design scalable, type-safe frontend architectures and AI-enabled features that improve performance, engagement, and business outcomes. I’m passionate about AI-driven UX, LangChain/LangGraph workflows, RAG, vector databases, and real-time, cross-platform experiences. I enjoy turning complex problems into intuitive products, collaborating with cross-functional teams, and delivering robust systems from architecture to production.…Hi, I’m Jack Foxcroft, a Senior Full-Stack Engineer based in Bristol, UK. I specialise in TypeScript/JavaScript, Python (Django, Flask, FastAPI), and React (React Native, Svelte, Next.js), with hands-on experience across Azure and AWS. I design scalable, type-safe frontend architectures and AI-enabled features that improve performance, engagement, and business outcomes. I’m passionate about AI-driven UX, LangChain/LangGraph workflows, RAG, vector databases, and real-time, cross-platform experiences. I enjoy turning complex problems into intuitive products, collaborating with cross-functional teams, and delivering robust systems from architecture to production.

Available to hire

Hi, I’m Jack Foxcroft, a Senior Full-Stack Engineer based in Bristol, UK. I specialise in TypeScript/JavaScript, Python (Django, Flask, FastAPI), and React (React Native, Svelte, Next.js), with hands-on experience across Azure and AWS. I design scalable, type-safe frontend architectures and AI-enabled features that improve performance, engagement, and business outcomes.

I’m passionate about AI-driven UX, LangChain/LangGraph workflows, RAG, vector databases, and real-time, cross-platform experiences. I enjoy turning complex problems into intuitive products, collaborating with cross-functional teams, and delivering robust systems from architecture to production.

Skills

Experience Level

Expert

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Language

English

Fluent

Spanish; Castilian

Intermediate

Work Experience

Full Stack Engineer at R-Works LTD

January 1, 2022 - April 1, 2026

Led end-to-end frontend development using TypeScript across React.js, React Native, Svelte, and Next.js; delivered type-safe, self-documenting codebases with reduced runtime errors. Built cross-platform React Native mobile application with strict TypeScript configuration for seamless iOS/Android deployment. Developed component libraries and design systems, improving development velocity by 40% through strongly typed components and IDE autocompletion. Led AI-powered frontend work for web apps, optimized Core Web Vitals to under 200ms with Lighthouse scores around 95+. Engineered 3D visualisations using Three.js and integrated with real-time backend data. Built agent-powered dashboards and real-time AI interactions, with memory and tool-calling capabilities. Implemented WebSockets for live data streaming and collaboration. Designed LangGraph multi-agent systems for complex tasks, Retrieval-Augmented Generation (RAG) with vector databases, and AI agents with external API integrations. Imp

Project Engineer at Atkins

January 1, 2020 - January 1, 2022

Supported engineering software solutions for a major nuclear industry client; developed and optimized GraphQL APIs with end-to-end TypeScript typing across frontend and backend; designed full-stack web apps using Django REST Framework and React. Built secure API-driven architectures with authentication, analytics dashboards, and automation workflows. Created interactive data visualizations using React, TypeScript, and Three.js to support project monitoring and decision-making; integrated foundation models from Microsoft, Google, and Amazon into AI solutions.

Full Stack Engineer at HYDAC Technology Ltd

March 1, 2016 - December 1, 2019

Architected full-stack web applications using TypeScript across React and Svelte frontends with Node.js/Express/Fastify backends, ensuring type safety and consistency. Led migration from legacy jQuery to modern React/Svelte architectures, boosting maintainability and scalability. Developed Python applications with PostgreSQL, implemented code-splitting, lazy loading, and Redis caching. Built interactive 3D web experiences with Three.js; developed Django REST APIs and scalable backend services. Implemented automated support ticket workflows using TypeScript and Azure Functions; optimized cloud infra with Azure Blob Storage and CDN; configured CDN, caching, WAF, and DDoS protections.