Shiva Kumar User

I’m a performance-driven Ruby on Rails developer with 3+ years of experience building scalable, production-grade backend systems. I specialize in Rails 6.x/7.x, RESTful API development, PostgreSQL optimization, and microservices architecture—especially where reliability and throughput matter.

At Saranyu Technology, I’ve led end-to-end modernization of legacy OTT backend systems, migrating from Ruby 2.3/Rails 4.2 to Ruby 3.4/Rails 6. I delivered a 30% system performance and security improvement, built scalable CMS APIs for millions of users, and executed zero-downtime, large-scale data migrations while coordinating across teams to protect data integrity and system stability.

I also focus on production readiness: integrating multi-vendor payment (Razorpay, Stripe), SMS/email providers, implementing Redis caching and Sidekiq-powered background workflows, and driving code reviews and technical documentation. Beyond Rails, I architected high-throughput microservices for watch history and real-time engines using Redis Streams and durable PostgreSQL schemas to handle spikes without blocking request threads.