Full-Stack Codebase Refactoring

Budget: $750 - $1500

This is a project for Ryusei. Don't bid on it.

I need the entire codebase—Python with FastAPI on the server side, TypeScript/Next.js on the front end, backed by Postgres—carefully refactored. My two priorities are clear: squeeze out measurable performance gains and make the code far easier to read and navigate for anyone who joins the project later.

The work spans both layers, so you will dive into models, services, API endpoints, React components, and shared utilities. I expect thoughtful restructuring rather than a cosmetic sweep: identify bottlenecks, remove duplication, break up monolith files, and apply consistent patterns that fit our tech stack. Wherever you touch logic, keep unit and integration tests green; add tests where coverage is thin.

When the refactor is done I should be able to: • run benchmarks that demonstrate faster response times or lower resource usage, • open any module and follow the flow without hunting for hidden side effects, and • hand the repository to another developer with confidence that they can extend it quickly.

Please outline your proposed approach, tooling preferences (linting, formatting, profiling, etc.), and an estimated timeline for each major milestone.