Harikrishnan

About Me

Professional Summary

Senior Backend Engineer with 8+ years of experience architecting and scaling SaaS platforms from MVP to millions of monthly transactions. I specialize in high-scale API development and performance optimization, with proven success in driving user growth, revenue gains, and system efficiency improvements.

Skilled in Ruby on Rails, AWS, PostgreSQL, and CI/CD automation. Experienced in remote, cross-cultural team leadership across multiple time zones.

Professional Experience

Senior Software Engineer (Senior Consultant)

Thoughtworks — India · Java · PostgreSQL · Kafka · Redis · React

Sep 2025 – Present
  • Build backend services for a supply-chain replenishment platform on Java, PostgreSQL, Kafka, and Redis, delivering production features end to end
  • Implement replenishment workflows within an event-driven Kafka architecture, keeping inventory state consistent across asynchronous producers and consumers
  • Tune PostgreSQL data access and Redis caching for reliable, predictable service latency under production load
  • Work across backend and React frontend components, partnering with product and engineering teams to scope and ship client-facing features

Senior Software Engineer

Qoyod — Remote

Mar 2024 – Apr 2025
  • Led engineering team to deliver mission-critical features in Ruby on Rails & React
  • Reduced database load by 30% and cut API response times by 40%
  • Optimized reporting module architecture, reducing data processing time from 5s to 1s
  • Partnered with product teams to launch features contributing to user growth

Senior Software Engineer

Event Inc GmbH — Remote

Mar 2022 – Oct 2023
  • Designed scalable API processing 5,000+ requests daily
  • Built GraphQL layer reducing redundant API calls
  • Integrated multiple third-party services and automated workflows
  • Used Elasticsearch to enhance search capabilities

Software Engineer

Qoyod — Remote

Apr 2019 – Feb 2022
  • Developed secure REST APIs handling millions of financial records
  • Designed Audit module enabling customer self-auditing
  • Implemented CI/CD pipeline reducing deployment time from 7 days to 1 day
  • Led code reviews and mentored junior engineers

Technologies & Skills

Languages & Frameworks

Ruby on RailsRustReactNext.js

Databases & Infrastructure

PostgreSQLRedisElasticsearchAWSDocker

Education

MCA, Software Engineering & Web Development

Federal Institute of Science and Technology (FISAT), 2016

BCA, Software Engineering & Data Science

Bharathiar University, 2013

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