Marvellous Ujebor, a frontend engineer shipping AI-integrated products end-to-end. RAG pipelines, voice agents, multi-tenant platforms, and the interfaces that make them feel inevitable.
Marvellous Ujebor / Frontend Engineer · AI & Full-Stack
Self-taught frontend developer moved into production — now shipping software end-to-end across four countries. Core expertise in production frontends integrated with AI backends: RAG, LLM tool-use, voice agents and multi-tenant platforms.
I work with the modern stack — React, Next.js, TypeScript, Three.js, Framer Motion — and the AI stack — Anthropic, OpenAI, Gemini Live, VAPI, Google ADK, LangChain, Vector DBs. From design to DevOps to Linux admin.
A live AI job-research agent. Users paste a job URL; the agent extracts role requirements, compensation, growth potential and company culture via Claude + Llama 3.3 on Cloudflare Workers AI. Serverless backend on Durable Objects for stateful chat — no cold starts, sub-second responses over WebSocket.
Solo-architected production e-commerce — 20+ SKUs, multi-currency (AUD/USD/GBP/EUR/NGN) live FX, hybrid cart, and a Cloudinary AVIF/WebP CDN with a Prisma admin panel. The embedded “Amanda” AI shopping assistant uses Claude tool-use to look up real stock, real per-currency pricing and real shipping ETAs.
A Webflow stub corporate site and a slow 3s RAG chatbot serving both B2B and B2C tenants.
Multi-tenant chatbot with an embeddable widget and a real-time multi-channel inbox (email, SMS, social). An HTML email generator that saved 4+ hours a day. Rebuilt the site into a hardcoded Three.js experience, solo.
RAG response cut to 0.5s (83% faster); one reusable widget shipped across B2B and B2C tenants.
AI full-stack platforms with 5.2s loads and ad-hoc real-time data needs.
Node.js / Express / PostgreSQL platforms with Firebase + Supabase serverless real-time sync. WCAG audits and CRO collaboration.
Load time down to 2.1s (60% faster), with accessibility and conversion improvements shipped.
Financial-services users on unreliable connections abandoning payments.
An offline-first PWA (Next.js) with M-PESA integration and an Invoice Generator, plus a streamlined payment flow.
User engagement up 40%, with reduced payment abandonment.
Client projects needing reliable production frontends, and a junior team needing direction.
Production React / Next.js apps for client projects. Mentored junior developers on code quality, best practices, and Git workflows.
Shipped production apps and raised team code quality as Team Lead.
RAG pipelines, LLM tool-use, voice agents, multi-tenant AI systems. Anthropic, OpenAI, Gemini Live, VAPI, Google ADK, LangChain, Vector DBs and N8N.
My AI twin has read my CV, every project doc, my rates and my availability. Ask it about timelines, stack choices, or whether I'm a fit for the thing you're trying to ship.