I build and improve production SaaS products using React, Next.js, TypeScript, Node.js, PostgreSQL/Supabase, Stripe, and AI automation. My work covers complex product UI, dashboards, multi-tenant systems, API integrations, AI-agent workflows, testing, performance, and stabilising existing applications. I bring 8 years of software engineering experience. At Qonto, I proposed and built a forms platform that grew into a dedicated team. At Unbabel, I shipped tested interfaces used by 150,000+metering translators. I also build multi-tenant AI products with model routing, usage tracking, billing, n8n workflows, and agent tools. Engagements start with clear scope and acceptance criteria. For ambiguous builds, I recommend a paid discovery milestone followed by small, funded delivery milestones. You receive maintainable code, tests where appropriate, deployment support, and concise handover notes.