Available now for contract work up to 40h/week

JAVIERVILLANUEVA

Senior Full-Stack Engineer / Bournemouth, United Kingdom

Building AI, Web3, and modern product experiences for web and mobile.

VIEW WORK RESUME ↓
React Next.js Remix TypeScript React Native Node.js AI / LLMs RAG Pipelines Web3 Solidity Supabase Tailwind Vite Expo Svelte Vercel React Next.js Remix TypeScript React Native Node.js AI / LLMs RAG Pipelines Web3 Solidity Supabase Tailwind Vite Expo Svelte Vercel React Next.js Remix TypeScript React Native Node.js AI / LLMs RAG Pipelines Web3 Solidity Supabase Tailwind Vite Expo Svelte Vercel

12+

YEARS

15

REPOS

30+

TECHNOLOGIES

Feb 2026

LATEST

CLIENT WORK

HYTOPIA

HYTOPIA AI Studio

AI-assisted game creation workflows and prompt-driven tooling.

Nov 2025 - Present
VEYR

VEYR Fitness App

AI-personalized workout platform built with React Native and TypeScript.

Aug 2025 - Present
HYTOPIA

HYTOPIA Game Platform

Blockchain-backed gaming platform and real-time front-end systems.

Jan 2022 - Present
Cambria

Cambria: Duel Arena

Realtime multiplayer game with high-volume Web3 transactions.

Jan 2022 - Dec 2025
CD Keys

CD Keys

eCommerce engineering delivery for large-scale production storefronts.

Jan 2020 - Jan 2022

EXPERIENCE

Full Stack Engineer

VEYR

Aug 2025 - Present

Built an AI-powered React Native product delivering personalized fitness plans and streaming UX.

  • Implemented LLM personalization and RAG workflows with Vercel AI SDK and Gemini.
  • Shipped exercise substitution and multi-day plan generation with strong UX responsiveness.
  • Integrated Supabase and optimized data flows to improve reliability and load times.

Senior Front-end Developer

HYTOPIA

Dec 2021 - Present

Developed production Web3 interfaces for gaming products across multiple EVM networks.

  • Built React/TypeScript applications with Remix and Next.js for blockchain-powered game services.
  • Delivered world, collectibles, currencies, and avatar management systems for sandbox tooling.
  • Supported partner developers and agencies integrating platform capabilities.

Full Stack Engineer

Cambria

Jan 2022 - Dec 2025

Helped deliver a realtime crypto-enabled multiplayer game with secure high-frequency transactions.

  • Implemented Web3 transaction flows and wallet integration across game and blockchain layers.
  • Connected gameplay UX with smart contract infrastructure using Svelte and TypeScript.
  • Collaborated with backend services to improve stability and performance under load.

Technical Director

Media Lounge

Jan 2015 - Nov 2021

Led technical delivery for large eCommerce projects and managed a team of 11-20 engineers.

  • Architected Magento and API-based commerce platforms including commercetools implementations.
  • Owned planning, estimations, QA automation, and engineering process improvements.
  • Mentored engineers and maintained high standards for reliability and quality.

SKILLS

Frontend and Mobile

ReactNext.jsRemixReact NativeExpoSvelteTypeScript

AI and Data

LLM IntegrationsRAG PipelinesRealtime Streaming UXSupabaseZod

Web3 and Game

Blockchain / CryptoSolidityEthers.jsWagmiRealtime Multiplayer

Delivery

Node.jsExpress.jsCI/CDVercelHerokuAPI Design

REPOSITORIES

VEYR App

Feb 2026PUBLIC

React Native mobile app for fitness workflows, auth flows, and Supabase-backed data.

React NativeExpoTypeScriptNativeWindSupabase
#Mobile#Web#Data

HYTOPIA Website

Feb 2026PUBLIC

Main website experience for HYTOPIA with Remix, frontend performance work, and product pages.

RemixReactTypeScriptViteTailwind
#Web#Game

HYTOPIA Studio

Feb 2026PUBLIC

AI-assisted game creation studio where prompts drive creator workflows and project generation.

TypeScriptReactNode.jsAI
#AI#Game#Web

HYTOPIA Engine

Feb 2026PUBLIC

Core HYTOPIA game engine monorepo covering client, protocol, server, and native applications.

TypeScriptMonorepoGame NetworkingReact Native
#Game#Web

AI Pillow Measurement

Feb 2026PUBLIC

AI measurement workflow app focused on image processing and practical tooling for operators.

ReactTypeScriptVite
#AI#Web

HYTOPIA Web3

Feb 2026PUBLIC

Web3 application for HYTOPIA ecosystem flows, wallet interactions, and blockchain-aware UX.

RemixTypeScriptViteTailwindWeb3
#Blockchain#Web#Game

VEYR Exercise Upload

Jan 2026PUBLIC

Next.js application for exercise asset uploads and content workflows.

Next.jsReactTypeScript
#Web#Data

VEYR Website

Jan 2026PUBLIC

Public-facing site for Veyr with product messaging and conversion-focused landing experiences.

Next.jsReactTypeScript
#Web

VEYR KB Customiser

Dec 2025PUBLIC

AI-powered fitness intelligence engine for personalized plan generation and retrieval workflows.

Next.jsReactTypeScriptTailwindSupabaseLLMs
#AI#Data#Web

Cambria

Dec 2025PUBLIC

Large game system monorepo with backend services, frontend gameplay, and web3 contracts.

TypeScriptGame BackendPhaserColyseusSolidity
#Game#Blockchain#Web

VEYR Knowledgebase

Nov 2025PUBLIC

Python pipeline for turning PDFs, websites, and media into RAG-ready embeddings.

PythonRAGEmbeddingsAutomation
#AI#Data

Cambria Website

Nov 2025PUBLIC

Cambria web presence with product content and supporting frontend experiences.

SvelteTypeScriptTailwind
#Web#Game

Shadowsouls Runner

Sep 2025PUBLIC

Runner-style game project spanning miniapp frontend, API routes, and game server logic.

Next.jsTypeScriptAPITailwind
#Game#Web#Blockchain

Crossmint Onramp

Sep 2025PUBLIC

Crossmint onramp integration quickstart for wallet creation, payment, and funding flows.

TypeScriptOnchainPayments
#Blockchain#Web

Shadowsouls

May 2025PUBLIC

Multiplayer game monorepo with shared core packages, world map data, and frontend client.

TypeScriptMonorepoGame ClientGame Server
#Game#Web

LET'S BUILD
SOMETHING

Open to contract and paid software work. Available up to 40 hours per week to help you ship faster.

GET IN TOUCH RESUME