Is your React app stuck on an old version, slow to build, and piling up security warnings? I modernize aging React frontends incrementally — behind a test safety net — so you upgrade without breaking what already works. What I do: - Migrate Create React App → Vite (faster builds, smaller installs) - Upgrade React across major versions (e.g. 17 → 19) and resolve breaking changes - Update and de-risk dependencies; eliminate known CVEs - Add a regression test layer (Vitest/Cypress/Playwright) so changes are safe - Document the path so your team can keep moving after I'm done Proven results: On my most recent modernization I migrated CRA → Vite, upgraded React 17 → 19 across 6 major dependency jumps, eliminated all 41 known vulnerabilities, and raised test coverage from 4.82% to 97% — incrementally, with nothing broken in production. Not sure of the scope yet? Start with a Modernization Audit (below) — a clear roadmap before you commit to the full project.