L2:temmpat-2025 · Freelance
Lead Backend Engineer (freelance)
TEMMPAT
Nov 2025 to Feb 2026Verified
Led the v2 backend refactor of a premium event ticket marketplace into a modular auction and resale engine.
Highlights
- Wallets with a ledger, escrow and withdrawals
- Realtime buyer and seller negotiation over Socket.IO
- Role separation for admin, client and partner, monitored with Prometheus and Grafana
- Authored 162 of 267 commits (61%) in the repository
Stack
- Node.js
- Express
- PostgreSQL
- Sequelize
- Redis
- Socket.IO
- Docker
- Prometheus
- Grafana
L3 · See the case study on L3Event Ticket Marketplace Backend →