Timon Prata

Freelance / contract missions, fully remote. Best fit: scale-up SaaS, AI / LLM, fintech or deeptech teams that need a senior frontend engineer to take over a React / Next.js codebase, ship a product V1, build a design system or migrate a legacy front end to React. Also scientific UI, marketplaces, back-offices. Formats: 48h audit, 10-day sprint, multi-month contract. Freelance senior frontend engineer with 8+ years of experience, and member of Cantem, a collective of senior independent developers from École 42. I build React, Next.js and TypeScript product interfaces for complex domains: AI and LLM products, legaltech, scientific software, SaaS and Web3. My strength is codebase takeover: I onboard on a live React / Next.js codebase, map the technical debt, ship a first mergeable quick win within the first days and deliver visible results in week one. I structure frontend architecture, build design systems, turn Figma designs into shippable UI, and keep quality high with tests, CI/CD, monitoring, WCAG 2.2 accessibility and Core Web Vitals. Selected work: lead frontend at JIMINI AI on a cloud-native LLM platform for legal professionals (about 10K production requests per day; AI chat, embeddings-based document analysis, Auth0 multi-role access). For a scientific R&D software company, I designed and built the interface technicians use to draw molecular structures. For a wedding-planning SaaS, I shipped the V1: dashboard, signup, RSVP, guest management, budget and payment flows. Earlier, I integrated Solana wallets and NFT mechanics into a React Native app at Octo Gaming, and led the Twig/PHP to React migration of a high-traffic casino back-office. French native, fluent English (international missions, documentation, pair programming). Fully remote, freelance or contract.