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Himanshu Jain

@himanshujain4

I build high-throughput Java microservices, migrations, and payment integrations serving millions of transactional events.

India

Message

At Reputation, I built an event-driven Java 17 and Spring Boot Request microservice processing 150M+ monthly Email and SMS events at 5,000+ QPS. I also led a BigQuery-to-MongoDB and Elasticsearch migration of 1B+ records with zero data loss.

Previously at Simpl and Vymo Technologies, I delivered payment-platform integrations, optimized user-management APIs, and strengthened observability and CI/CD. I build distributed backend systems with Java, Spring Boot, MongoDB, Redis, Kafka, GCP, and AWS.

Experience

Work history, roles, and key accomplishments

Current

Software Development Engineer - II

Current

Reputation

Sep 2024 - Present (2 years 1 month)

Architected and built an event-driven Request microservice using Java 17 and Spring Boot to process over 150M+ monthly transactional Email and SMS events, sustaining peak throughput of 5,000+ QPS. Designed and implemented a large-scale data migration pipeline from Google BigQuery to MongoDB and Elasticsearch using Redis and Google Cloud Pub/Sub, migrating 1B+ legacy records at 10,000+ docs/sec thr