Open to opportunities

Rohan Kar

@rohankar

Message

Senior backend engineer specializing in Java, Spring Boot, scalable microservices and cloud infrastructure.

India

Message

What I'm looking for

I seek backend/cloud roles where I can design scalable microservices, improve reliability and observability, mentor teams, and work in security-conscious, growth-focused environments.

I am a senior backend engineer with 4.5 years of experience in fintech and automation, focused on building scalable microservices, reliable APIs, and secure cloud infrastructure using Java, Spring Boot, Docker and AWS. I have led re-architecture efforts, improved caching and deployment pipelines, and driven measurable improvements in performance, stability and user engagement.

I excel at production debugging, observability (New Relic), CI/CD security, and mentoring teams while delivering features like FX rate comparison services, plugin-based automation platforms, and device reservation systems. I prioritize clean code, root-cause analysis, and designing systems that scale.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

MoneyHOP (Unobanc Pvt Ltd)

Nov 2024 - Present (1 year 1 month)

Developed an FX rate comparison service and rebuilt caching strategy, improving response times ~40%, reducing manual rate validation ~50%, and increasing transaction conversions; re-architected monolith into microservices increasing throughput by ~25% and improved infrastructure security and CI/CD posture.

Java Spring Boot AWS MySQL Docker Microservices Caching CI CD Observability

Software Developer

Simplify3x

Apr 2021 - Oct 2024 (3 years 6 months)

Built a plugin-based backend automation platform and integrated an open-source IDE, reducing development effort by 20% and increasing user interaction by 40%; delivered device reservation feature and mentored junior developers.

Java Spring Boot Docker AWS S3 Maven Appium REST APIs Automation CI CD

Software Developer Intern

Simplify3x

Nov 2020 - Mar 2021 (4 months)

Implemented a Python OpenCV library to detect UI elements as a fallback for tests, reducing consistent test failures by 25%.

Python OpenCV Test Automation UI Detection Debugging

Education

Degrees, certifications, and relevant coursework

Christ University

Bachelor of Computer Applications, Computer Applications

2018 - 2021

Grade: GPA: 9/10

Completed a Bachelor of Computer Applications with strong academic performance (GPA 9/10) focused on software development and computer science fundamentals.