Jack Munkonge

I'm a senior full-stack and mobile engineer, eight years in, mostly TypeScript, React, React Native and Node. I'm the person teams bring in when something needs to actually ship — I've re-architected forty screens in three weeks, taken a product from prototype to transacting as Tech Lead, and I'm usually the one who spots the delivery risk before it becomes a deadline problem.

I use Claude and AI coding agents daily, but I treat what they produce as a first draft. The architecture, the tests, and the call on whether a generated solution is actually good stay with me. I've built the guardrails and review process that make AI-assisted output shippable in production — that's the part most teams are short of.

Being straight about AI depth: my production work is guardrails, automation and AI-assisted delivery, not model training. I'm building RAG and evaluation tooling now and I'll happily share it. If you need someone to own the system around the model, that's me. If you need a researcher, I'll tell you on the first call.

Remote from São Paulo (UTC−3 — overlaps US mornings and all of Europe's afternoon). Async-first, writes things down, flags problems early. I contract through a UK Ltd and invoice in USD or GBP, so there's no payroll setup on your side. Open to part-time or full-time, three to six months with room to extend.

Outside work I built thesugar.dev — design system, full stack, blog, all of it — mostly to prove to myself I could.