I have an AI-powered accounting web app that already runs on Supabase and a Lovable-based frontend. My co-founder and I are now racing toward launch and need an experienced full-stack developer who can jump straight into our existing codebase, clear out lingering bugs, refine a few rough UI edges, and finish two critical integrations: 1. Cashfree – wire up payment processing and subscription management so new users can pay and activate plans seamlessly inside the app. 2. GST Portal – connect through our chosen Suvidha provider, letting Indian businesses push GST returns directly from their dashboard. Scope of work • Frontend bug fixes and small UI polish (Supabase Auth flows, dashboard widgets, responsive tweaks). • Backend bug fixes in our Supabase functions, Postgres triggers, and API endpoints. • Cashfree integration: collect payments, create subscriptions, handle webhooks for renewals and failures. • GST integration: authenticate via GSP, fetch/save GSTN data, file returns, and surface status updates in the app. • End-to-end testing to prove each flow works on staging and production. Acceptance criteria • No critical console errors in browser or server logs. • A new user can sign up, pick a plan, pay through Cashfree, and immediately unlock premium features. • An existing user can file a GST return without leaving the app and receive confirmation from the Suvidha provider. • All changes merged, documented, and deployed within the agreed timeline. Tech environment Supabase, TypeScript, Lovable UI components, REST/GraphQL endpoints, Cashfree APIs, GST Suvidha provider APIs, GitHub. The timeline is tight, so I’m looking for someone who is comfortable pairing with us over quick calls, pushing frequent commits, and getting this across the line fast. If you’ve shipped production-ready Supabase projects and have handled Indian payment and GST flows before, let’s talk.