Backend Software Engineer – Payments & Fintech Infra at ZedPe (Zedfly Innovations) (2025-07 – Present)
- Scaled payment APIs from 400 TPS to handling peak bursts of 1,500–2,000 TPS by decoupling synchronous flows into async pipelines and deploying containerized services Docker on AWS ECS Fargate, eliminating DB timeouts under load.
- Reduced primary DB load by 70% by offloading high-frequency writes to DynamoDB and serving hot reads via Redis, trading strict consistency for performance and ensuring correctness via async reconciliation Background Jobs.
- Designed a reliable event pipeline using Kafka (durable ingestion) and BullMQ (retry, backoff, DLQ) to process acquirer events and ensure secure, lossless merchant webhook delivery with HMAC sign.
- Developed a USDT (TRC-20) on-chain withdrawal service handling $800K+/month, implementing nonce-based idempotency (SHA-256) and failure-safe retries for consistent blockchain settlements.
- Improved reliability under peak load (1.5K+ TPS) to 99.9%+ API success rate using circuit breakers and observability (Prometheus, Grafana, ELK, OpenTelemetry), enabling rapid detection of acquirer failures and preventing cascading outages.
Backend Engineer at Classcard Inc (2025-02 – 2025-06)
- Built notification and reminder system (cron-based + queues) for students and institutions, automating workflows like attendance alerts, billing reminders, and engagement notifications across 400+ institutions.
- Improved backend efficiency by optimizing PostgreSQL queries and introducing async job processing (Redis queues), while developing lead management pipelines for ops teams to enable automated categorization and faster outreach.
Software Engineer at Ixambee (2023-08 – 2025-01)
- Improved checkout performance for course and mock test purchases (peak 500+ concurrent users) by reducing DB row lock contention, moving non-critical operations (notifications, side-effects) to async queues.
- Independently designed and deployed an in-house Full Stack project management platform (400+ active users), replacing external tools (Asana-like) to reduce operational cost and enable custom workflows such as bulk task ingestion, automated reminders, and team-level visibility.
