Full-Stack Developer for PredictPix Integration

Full-Stack FastAPI + Next.js Developer (Supabase + Pi Network Integration)
Contract Type: Fixed price with milestones
Bonus: 150 USD for verified Pi SDK integration (test-Pi on Pi Testnet)

About PredictPix

PredictPix is a community forecasting platform built for the Pi Network.
Users make predictions on real-world events using Pi, demonstrating collective intelligence and real network utility (not gambling or speculation).
Our MVP is nearly complete and already deployed on DigitalOcean.
Both backend (FastAPI) and frontend (Next.js 15) are live and connected to Supabase.
We are looking for a strong full-stack finisher to polish, stabilize, and finalize the Pi Testnet launch version.

What’s Already Working

FastAPI backend (predictpix.service)
Next.js 15 frontend (predictpix-ui.service)
Supabase (Postgres) database synced and live
Nginx, SSL, and Cloudflare configured
Branding, theming, and market creation complete
Pi Browser validation key deployed

What’s Left to Do

Milestone 1 — Integration and UI Finalization

Wire remaining data calls for /account, /leaderboard, and /admin pages
Add leaderboard endpoint (aggregate user accuracy, participation, and results)
Fix modal and JSON fetch issues (Prediction Details, History, Recent Activity)
Confirm REST to Supabase data consistency
Verify CORS, Nginx, and domain routing for Pi Browser access
Match visuals to reference screenshots and confirm full mobile responsiveness

Deliverable: PredictPix runs cleanly in the Pi Browser, with all pages functional and accurate Supabase data.

Milestone 2 — Testnet Deployment Readiness

Confirm smooth operation on the DigitalOcean droplet (backend, frontend, and Nginx)
Ensure HTTPS, SSL, and domain routing are stable
Validate that all prediction submissions, admin resolutions, and leaderboard updates complete end-to-end
Prepare README.md and setup documentation for GitHub so new contributors can run the app locally
Provide a short video walkthrough or checklist verifying launch readiness

Deliverable: Fully deployable PredictPix MVP, operational in Pi Browser on the Pi Testnet, with database and admin tools functioning as expected.

Bonus (Optional Milestone) — Verified Pi SDK Integration

Implement Pi SDK login and payments flow for Pi Testnet (non-custodial)
Connect front-end SDK actions to new backend verification routes (/api/pi/payments/init and /complete)
Verify transactions using PI_SERVER_API_KEY and confirm test-Pi movement on the Pi Testnet
Update database entries to mark predictions as paid upon successful transaction
Provide a brief demo video showing an end-to-end transaction in Pi Browser

Deliverable: Functional Pi SDK payment integration verified on Testnet (Pi moves between test wallets successfully).
Bonus: 150 USD released upon verified completion.

Ideal Developer

Solid experience with FastAPI and Next.js (App Router)
Strong Supabase and PostgreSQL query and RPC skills
Skilled in debugging deployed apps (not just new builds)
Knowledge of async Python, fetch handling, and JSON structure validation
Familiar with Ubuntu 22, Nginx, and DigitalOcean server configuration
(Bonus) Prior exposure to Pi Network SDK or blockchain testnets

Tech Stack Overview
Layer Technology
Frontend Next.js 15 + Tailwind + shadcn/ui (React, TypeScript)
Backend FastAPI (Python 3.11)
Database Supabase (Postgres)
Deployment DigitalOcean + Nginx + Let’s Encrypt TLS
Blockchain (Testnet) Pi SDK integration (login and payments)

Deliverables

Functional /account, /leaderboard, and /admin pages
Verified prediction submission and resolution flows
Mobile-ready, responsive UI for Pi Browser
Fully deployable PredictPix MVP on Testnet
Clear documentation and walkthrough for QA
Optional Bonus: Verified Pi SDK payment integration with test-Pi

Timeline

Approximately 7 days from project start for Milestones 1 and 2
(plus 2–3 days optional for Pi SDK bonus milestone)

To Apply

Please include:
Links to FastAPI and Next.js work or GitHub examples
A short outline of how you would approach the remaining tasks
Confirmation you can start immediately
Your timezone and typical working hours