About Jack
- Tech-savvy and results-driven Senior Full-Stack Engineer with expertise in TypeScript/JavaScript, Python (Django, Flask, FastAPI), React (React Native, Svelte, Next.js, Three.js, Node.js), Azure cloud services, and AI agent development.
- Proven track record of building scalable web and mobile applications with type-safe frontend architectures, optimising performance, and integrating LLMpowered features into production systems on Azure and AWS.
- Skilled in LangChain, LangGraph, RAG architectures, vector databases, and API development.
- Passionate about crafting intuitive, AI-enhanced user experiences that drive engagement and business growth.
English
Native or bilingual
Spanish
Fluent
Remote only
Primarily works remotely
Experience
- R-Works LTDFull Stack EngineerDIGITAL AND ITJanuary 2022 - April 2026 (4 years and 3 months)Kent, UK
- Led end-to-end frontend development using TypeScript across React.js, React Native, Svelte, and Next.js, delivering type-safe, self-documenting codebases with reduced runtime errors.
- Built and shipped a cross-platform React Native mobile application with strict TypeScript configuration, achieving seamless iOS/Android deployment and compile-time safety across shared codebases.
- Developed component libraries and design systems using TypeScript with Svelte and SvelteKit, improving development velocity by 40% through strongly-typed components and IDE autocompletion.
- Developed advanced 3D visualisations using Three.js with TypeScript type definitions, integrated with real-time backend data services for live data visualisation.
- Built agent-powered dashboards using TypeScript, React, Node.js and Tailwind CSS, enabling users to interact with AI agents in real time whilst visualising reasoning processes.
- Implemented advanced state management using Redux Toolkit, Zustand, and Svelte stores with full TypeScript support, eliminating a category of runtime type errors.
- Designed and deployed LangGraph-based multi-agent systems using TypeScript and Python, orchestrating autonomous AI agents for complex task execution, research, summarisation, and decision-making workflows.
- Designed and deployed Retrieval-Augmented Generation (RAG) systems leveraging vector databases to improve LLM response accuracy and reduce hallucinations.
- Implemented document ingestion pipelines supporting PDFs, web pages, structured data, and enterprise knowledge bases with automated embedding generation.
- Integrated Pinecone vector database alongside traditional databases in a RAG system for hybrid search and Retrieval.
- Engineered conversational AI agents with memory and tool-calling capabilities using LangGraph, enabling persistent context across multi-turn interactions and external API integration.
- HYDAC Technology LtdFull Stack EngineerMarch 2016 - December 2019 (3 years and 9 months)Witney, UK• • Architected and delivered full-stack web applications using TypeScript across React and Svelte frontends, and Node.js, Express and Fastify backends, ensuring type safety and consistency throughout the technology stack.• • Led the re-architecture of legacy applications, migrating monolithic jQuery codebases to modern component-based React and Svelte frameworks, significantly improving maintainability, scalability and code quality.• • Developed and maintained Python applications supported by React and Svelte frontends and PostgreSQL databases, improving application performance through code splitting, lazy loading and Redis caching strategies.• • Engineered interactive 3D web experiences using Three.js and TypeScript, delivering smooth cross-platform performance acrossdesktop and mobile devices.• • Developed and maintained scalable backend services using Django and Django REST Framework, building secure RESTful APIs for web and mobile applications.• • Designed and developed workflows for automated customer support ticket triage and response generation using TypeScript and Azure Functions, streamlining support operations and improving response times.• • Optimised cloud infrastructure and content delivery using Azure Blob Storage and Azure CDN, improving application responsiveness and user experience for global audiences.• • Configured CDN, caching, rate limiting, WAF, and DDoS protection to enhance application security and performance.
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Education
- Bachelor of ScienceUniversity of Northampton2015Bachelor of Science
- National Certificate in Mechanical EngineeringAbingdon Witney College2012National Certificate in Mechanical Engineering