Full-Stack Developer Needed for Phase 2 of Exist

We are looking for an experienced full-stack developer or development team to take over and continue development of an existing education management platform. The platform is already live and Phase 1 has been completed. The current tech stack is Next.js 16, NestJS 11, TypeScript, Prisma 6, PostgreSQL, Docker, and AWS. For Phase 2, we need approximately 12 feature improvements, including lesson copy/move, calendar view improvements, account/password management, Teams recording link improvements, finance record adjustments, student wallet/status filtering, invoice redesign, recurring lessons, bulk lesson creation, lesson-note links, and trial/regular lesson selection. The platform does not process real payments or hold funds. Financial features are only used for internal record-keeping, such as student balances, lesson charges, teacher compensation, and finance approval records. We are looking for someone who can first understand the existing codebase and reuse the current business logic wherever possible rather than rebuilding existing functionality. Please include in your proposal: * Your estimated total development hours and cost * Expected completion timeline * Relevant experience with Next.js / NestJS / PostgreSQL * Whether you are an individual developer or a team * Examples of similar existing-platform or SaaS projects you have taken over * Your availability for ongoing maintenance after Phase 2 We will provide the detailed Phase 2 scope document and access to the existing codebase after initial discussion.