MR
Maksudur Rahman
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Enterprise Payment Gateway

Lead Backend Engineer2023 - Present

Project Overview

A high-throughput payment processing system capable of handling 10,000+ transactions per minute with sub-second latency.

Tech Stack

Node.jsRedisPostgreSQLDockerKubernetes

Impact

Reduced transaction failure rate by 40% and improved processing speed by 2x.

Challenges & Solutions

Challenges

  • Ensuring ACID compliance during peak loads.
  • Integrating with 15+ external banking APIs with varying protocols.

Solutions

  • Implemented distributed locking using Redis for race condition handling.
  • Built a robust retry mechanism with exponential backoff for failed transactions.