Headline

Engineering @ Firstclub | Ex - Flipkart | Java, Spring Boot, Kafka, Redis | Microservices & Distributed Systems | LeetCode Top 8% (1778)

About

🚀 Nishkarsh Srivastava | Backend Engineer | Java & Spring Boot | System Design Enthusiast I’m a passionate backend engineer currently working at Flipkart (Cleartrip), where I focus on building scalable and high-performance systems that power tens of thousands of users daily. I specialize in Java, Spring Boot, Redis, Kafka, and ElasticSearch, and recently led key projects such as Flipkart VIP/Myntra Elite Loyalty Integrations, SuperCoin platform config revamp, and multi-fare insurance flows — all contributing to performance gains, fraud prevention, and smoother user experience. From my early days as a top-ranked trainee at HCL TechBee to consistently ranking in the top 8% on LeetCode, I’ve been deeply invested in crafting robust backend solutions and growing as an engineer. I’ve solved 400+ DSA problems and enjoy tackling real-world challenges involving concurrency, system design, and observability. 🎯 Currently diving deeper into distributed systems, Low Level Design, virtual threads, and dynamic config-driven architectures. 📧 Email: nishkarshs5@gmail.com 🔗 LinkedIn: linkedin.com/in/nishks/ 💼 GitHub: github.com/nishks 🧠 LeetCode: leetcode.com/u/nishks

Location

Bengaluru

AI stack

claude code

claude

codex

gemini

langchain

openai

Work experience

Software Engineer at FirstClub, Apr 2026 - Present · 6 mos, Bengaluru, Karnataka, India, • Built the DAM system using an event-driven architecture leveraging AWS SQS, Lambda, pre-signed URLs, and asynchronous processing to efficiently handle large uploads and high traffic at scale. • Optimized Product Search APIs, improving response latency and enhancing product discovery experience for users.

Software development engineer at Flipkart, Jul 2024 - Mar 2026 · 1 yr 9 mos, Bengaluru, Karnataka, India, • Designed and implemented WOW pricing and savings engine for Cleartrip & Flipkart Flights, enabling users to identify optimal booking prices; reduced price uncertainty and improved conversion rates. • Built and scaled loyalty and rewards system for Cleartrip, improving user engagement and repeat bookings through personalized incentives. • Engineered high-performance coupon delivery system for SRP using Java virtual threads, integrating SuperCoins; reduced latency and improved throughput under high traffic. • Led migration of backend services from Java 11 to Java 21 and Spring Boot 3, achieving improved performance, better concurrency handling, and reduced resource utilization. • Developed real-time monitoring and anomaly detection systems, significantly reducing fraud incidents and improving platform reliability.

SDE intern at Flipkart, Jan 2024 - Jun 2024 · 6 mos, Bengaluru, Karnataka, India, • Engaged with the Air Supplier team at Cleartrip, contributing to the enhancement of our team's internal application. • Spearheaded backend development and UI enhancements, amplifying the functionality and user experience of our internal application. • Leveraged SpringBoot for robust backend solutions and React for seamless frontend development, ensuring a cohesive and responsive user interface. • Currently immersed in tackling an intriguing problem, driving innovation and efficiency within the team.

Education

Computer science, Computer Science, Chitkara University

Public links

leetcode: https://leetcode.com/nishks