I help founders and product teams safely extend existing React/Next.js and Node.js applications without unnecessary rewrites. I step into an existing codebase, understand the feature or failure boundary, implement the smallest maintainable change, and verify the result. Deliverables can include: • Codebase and issue-scope review • Implementation plan • React/Next.js frontend changes • Node.js/Express backend changes • Database/API updates • Validation, error handling, and regression checks • Deployment support and concise technical handoff Small production fixes typically take 2–5 business days after scope confirmation. Bounded feature work typically takes 1–3 weeks depending on the codebase and acceptance criteria.