Laravel Backend Engineer — Auctions & Payments

Responsibilities

• Design and implement the auction domain : sessions, lots, bid records, anti-sniping rules, auto-extend logic, minimum increments, and concurrency handling.
• Develop secure RESTful APIs following DDD and SOLID principles with clear layering (Application / Domain / Infrastructure).
• Implement the payments domain : end-to-end payment flows (init → 3DS / redirect → callback / webhook → capture / refund).
• Integrate multiple payment providers (Geidea, Tap, Stripe, etc.) behind a unified adapter interface.
• Build a lightweight accounting system (ledger, journal, daily reconciliation).
• Use Redis for distributed locks, counters, pub / sub, and streams.
• Write robust automated tests (Unit, Integration, Contract) with high coverage.
• Optimize PostgreSQL / MariaDB queries with advanced indexing and proper transactions.
• Enforce security practices : HMAC signatures, PCI-DSS awareness, tokenization, replay protection.

Requirements