Sumit Kumar
MTS @Techmojo | Knight @Leetcode (1400+ problems) | Java, springboot, backend
- Role
- System Engineer at Tata Consultancy Services
- Location
- Hyderabad, TG, IN
- LinkedIn followers
- 500 followers
About Sumit Kumar
I’m a Backend Developer with over 2 years of experience building scalable and efficient systems using Java and Spring Boot. My work is driven by a strong understanding of system design (LLD & HLD), design patterns, and data structures and algorithms.At Tata Consultancy Services, I’ve contributed to backend development projects involving asset and visitor management, event-driven architecture, focusing on performance optimization and clean, maintainable code.Beyond my professional work, I’m deeply passionate about problem-solving — having solved 1500+ challenges on LeetCode (Knight rank) — which reflects my persistence, analytical mindset, and love for continuous learning.I’m currently exploring new opportunities where I can contribute to impactful backend systems, learn from talented teams, and grow into a strong system design engineer.
Experience
System Engineer
Aug 2023 — Present · Mumbai, IN
Working on a fintech and banking project for State Bank of India (SBI), focused on scalable backend development, API integrations, and performance optimization in a microservices-based architecture.Key Highlights:Built RedisBloom-based uniqueness system: 5x faster lookups, 3x throughput, 80% less memory, scaled to 10M+ usernames.Reduced transaction time by 40% via PostgreSQL query & index optimization.Integrated Spring Cloud Gateway for 15+ microservices; cut latency by 25%.Developed Data Reusability API enabling 80% dataset reuse, reducing storage by 20%.Tech Stack: Java, Spring Boot, Redis, PostgreSQL, Docker, Kubernetes, Git, Postman
Education
CGC Jhanjeri
Bachelor of Technology - BTech
2019 — 2023
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