Sundaram Kharya
Senior Software Engineer at Paytm | Ex-Infoscion | Backend Development | Java | Spring Boot | Microservices | SQL | REST APIs| Cloud
- Role
- Senior Software Engineer at Paytm
- Location
- Kanpur Nagar, UP, IN
- LinkedIn followers
- 500 followers
About Sundaram Kharya
Backend engineer with 4.5 years of experience working on Java-based production systems and cloud platforms.Currently contributing to the modernization of a large legacy monolithic application, upgrading the stack from older Java and Spring versions to JDK 17 and Spring 5.x. My work involves refactoring legacy code, preserving functional stability during migration, and debugging issues that surface in real production flows.I’ve also worked on high-throughput, multi-threaded backend services, where I focused on memory leak analysis, concurrency tuning, and performance bottleneck removal. In parallel, I’ve built and automated CI/CD workflows, designed REST APIs, and worked with Azure-based cloud infrastructure and data pipelines.I’m particularly interested in backend reliability problems — things like legacy upgrades, N+1 query fixes, production incident debugging, and systems that misbehave under load.Tech stack I work with regularly: Java, Spring Boot/Spring MVC, Azure/AWS, RabbitMQ/Kafka, Apache NiFi, Docker, and Kubernetes.Currently exploring opportunities where I can contribute to scalable backend platforms and continue growing in distributed systems and platform engineering.
Experience
Senior Software Engineer
Nov 2025 — Present · Noida, IN
Contributing to the modernization of the Mobivite platform by upgrading a legacy Java 7 and Spring 2.5.x monolith to Spring 5.x and JDK 17. Refactoring legacy Spring MVC and JSP components, resolving compatibility issues, and preserving functional parity during phased upgrades. Identified and refactored multiple N+1 query patterns, improving database efficiency and request performance. Identified and resolved performance bottlenecks in multithreaded processing, improving message throughput and overall system stability.
Education
CHANDIGARH UNIVERSITY
Master of Computer Applications - MCA, Computer Programming, Specific Applications
Axis Colleges
BCA, Computer Programming, Specific Applications
2017 — 2020
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