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Avinash Kumar

@avinashkumar30

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Lead Software Engineer at JP Morgan who delivered an FX quote service driving $900M in first-quarter turnover.

India

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At JP Morgan, I led a five-engineer team delivering Spring Boot microservices for a cross-border payments platform processing $2B+ in daily transactions. I owned the design of an FX quote service that drove $900M in turnover in its first quarter.

At Paytm, I led the delivery of settlement microservices processing 120M+ transactions a day at peak rates of 10K TPS. I also reworked merchant billing sharding, cutting per-query latency 10×, and introduced an active-merchant strategy that reduced database CPU utilization by 20%.

Experience

Work history, roles, and key accomplishments

Current

Lead Software Engineer

Current

JP Morgan

Aug 2024 - Present (2 years 1 month)

Led a team of 5 engineers to design and deliver Spring Boot microservices for a blockchain-enabled cross-border payment system processing $2B+ daily. Owned the technical design of an FX quote service and a real-time transaction enquiry service, and built an AI-powered debugging agent.

Java Spring Boot Microservices AWS SQS Claude MCP RAG Cloudwatch Rate limiting Leaky Bucket Idempotency Concurrency Control

Technical Lead

Paytm

Nov 2021 - Aug 2024 (2 years 9 months)

Led a 4-engineer team to design and deliver core settlement microservices for the Paytm Payment Gateway using Kafka-based event-driven architecture, processing 120M+ transactions daily. Architected an on-demand settlement service, introduced Redis caching, and reduced bill-closure duration from 4+ hours to 2.5 hours.

Java Kafka Microservices Redis gRPC Event Driven Architecture Caching Performance Optimization Mentorship

Senior Analyst

Deutsche Bank

Apr 2019 - Oct 2021 (2 years 6 months)

Developed and optimized REST APIs for reference data delivery, serving 100K+ daily requests. Built a transaction investigation tool, implemented unit testing with JUnit and Mockito, and automated recovery of stuck reference-data files.

Java REST APIs Junit Mockito Automation Debugging Unit Testing

Technical Analyst

Infosys Ltd

Jun 2014 - Mar 2019 (4 years 9 months)

Developed and enhanced REST APIs to support evolving business requirements while meeting SLA commitments. Led production incident resolution and automated manual report generation workflows.

Java REST APIs Production Support Incident Management Automation Report Generation