Distributed Systems / Payments
Distributed Payment Flow
A resilient payment workflow designed to reduce inconsistencies between orders, payments, refunds, and external providers.
Problem and context
Transactional consistency in a high-concurrency payment environment.
Payment flows often cross order services, external providers, refunds, notifications, and customer-facing states. The work focused on keeping those boundaries consistent when requests arrive concurrently or providers respond late.
Technical responsibilities
Designed backend flow boundaries, idempotency behavior, retry paths, Redis-backed locks, and failure handling around payment, reservation, order, and notification workflows.
Architecture decisions
Used saga-style orchestration, explicit state transitions, idempotent webhooks, delayed retries, DLQ handling, and Redis coordination to reduce duplicate processing and inconsistent state.
Result
A clearer payment architecture with better reliability around provider callbacks, concurrency control, and recovery from partial failures.
Related case studies
Full Stack / Regulatory Data
Energy Monitoring Platform
A full stack platform for analyzing electrical distribution data, operational indicators, alerts, and regulatory reports.
Full Stack / Real-Time Operations
Large-Scale Event Management
A platform for scientific events with registrations, payments, papers, on-site reception, badge printing, and real-time attendance flows.