Things I've built

TrackTrack

Inventory, sales and credit for wholesalers - built for the doorway, not the office.

A multi-tenant web app for Ghanaian wholesalers: stock counted in cartons and loose pieces, multi-item sales with discounts and credit, purchase orders, money owed, and reports - and it keeps selling when the network drops.

• Offline-first: sales recorded on the phone without signal are queued and synced when the network returns
• ACID checkout - a multi-item sale rolls back completely if stock runs out halfway through
• Units that match the trade: cartons and loose pieces, with price and stock converted automatically

• Python
• Flask
• PostgreSQL
• SQLAlchemy
• Alembic
• Bootstrap 5
• Chart.js
• Service Worker
• Docker
• Neon

Group-Alloc

Sequential group numbers for university classes, with zero duplicates under load.

A multi-tenant tool for course reps: group leaders open a class link and claim the next group number; the rep watches the roster fill in live and exports a PDF presentation schedule for the lecturer.

• Race-condition-proof allocation: an atomic UPDATE … RETURNING counter row in PostgreSQL guarantees #1, #2, #3 with no duplicates even when everyone submits at once
• Multi-tenant: one database, tenant_id isolation, and a rep can manage several classes across semesters
• Two portals - a public, mobile-first submit page per class code, and an authenticated admin dashboard

• Node.js
• Express
• PostgreSQL
• React
• Vite
• JWT
• jsPDF
• Neon
• Vercel