Distributed Systems · Java · Spring Boot · Kafka · Microservices · Payments

Backend engineer with 4+ years building high-availability, high-throughput systems in fintech and enterprise automation. I design for scale, own outcomes end-to-end, and ship with measurable impact.

📍 Bengaluru, India · LinkedIn · Portfolio · Email · LeetCode · HackerRank · GfG

Systems that handle real load with real consequences:

• PCI-DSS Token Vault @ PayU — card tokenization/detokenization microservices across 50+ merchant integrations, targeting 99.99% uptime on Kubernetes
• Enterprise Job Orchestration @ HCLSoftware — Kafka-driven event infrastructure processing 150K+ events/day with zero message loss
• HDFC Bank EOD Reporting — SQL optimization reducing report generation 25 min → < 5 min (80% faster) via composite indexes, materialized views, and CTE rewrites on 12M-row Oracle tables
• Oracle → PostgreSQL Migration — 200+ tables migrated using Hibernate dialect abstraction; expanded SQL compatibility by 40% with zero application rewrites for 95% of queries
• CI/CD Overhaul — Jenkins + Docker pipeline shrinking deployment time 120 min → 20 min (6×); multi-stage Docker cut image size 75% (600MB → 145MB)

Languages · Java 17+ · Python · SQL · Bash

Backend · Spring Boot · Spring Cloud · Spring Security · Spring Data JPA · Hibernate · OAuth2 / JWT · REST APIs · Resilience4j

Messaging · Apache Kafka · Event-Driven Architecture · Dead Letter Topics · Kafka Streams

Databases · PostgreSQL · MySQL · Oracle SQL · MongoDB · Redis · H2

Cloud & Infra · AWS (EC2, RDS, S3, EKS) · Docker · Kubernetes · Jenkins · CI/CD · Prometheus · Grafana · Liquibase

Practices · Microservices · Distributed Systems · TDD · SOLID · System Design (HLD/LLD) · Agile/Scrum

🏷️ Spring Boot · Spring Cloud · MySQL · Docker · OAuth2 · Spring Security · JUnit 5

Full microservices banking platform with three domain services (Accounts, Loans, Cards), API Gateway, and Config Server.

• OAuth2 Authorization Code flow for user authentication; Client Credentials for service-to-service calls — no user credentials ever touch downstream services
• JWT validation at the gateway layer; method-level @PreAuthorize per endpoint
• Containerized via Docker Compose; images on Docker Hub; full Swagger/OpenAPI documentation
• 95%+ test coverage via JUnit 5 + Mockito + Testcontainers

Key engineering decision: used Spring Cloud Gateway as the single entry point — all inter-service OAuth2 token exchange is internal, keeping the surface area for auth vulnerabilities minimal.

🏷️ Java · Swing/AWT · OOP · Strategy / Factory / Observer Patterns · SOLID

Complete chess engine with GUI, full rule enforcement, and clean domain design.

• Strategy pattern per piece type — each piece implements its own canMoveTo() rule; the board calls the piece's strategy, no switch/case in game logic
• Check detection: tests all possible moves post-move to verify king safety
• Full coverage: check, checkmate, stalemate, castling, en passant, pawn promotion
• Clean separation between game domain logic and Swing presentation layer

PayU Digital Labs — Software Engineer (Mar 2026 – Present)

• Architecting fault-tolerant token lifecycle microservices (tokenization / detokenization / revocation) for PCI-DSS Token Vault across 50+ merchant integrations
• Designing Kafka event-driven payment infrastructure on Kubernetes with horizontal pod autoscaling — targeting 99.99% uptime SLA
• Hardening observability via Prometheus + Grafana; reducing MTTR by 40%

HCLSoftware — Senior Software Engineer (Aug 2022 – Mar 2026)

• Delivered 10+ production REST APIs serving 50,000+ daily transactions at 99.95% uptime
• Led 5-engineer team to re-architect HDFC Bank's EOD reporting pipeline — 80% faster generation, eliminated overnight SLA breaches
• Built Kafka event-driven orchestration automating 100% of manual job triggers — 3× throughput (150K+ events/day), zero message loss
• Migrated billing pipeline to REST microservice — 45% faster processing via batch API calls, internal networking, and 10-thread ExecutorService
• Established Jenkins + Docker CI/CD compressing release cycles 6×; enforced TDD via JUnit 5 / Mockito achieving 85%+ coverage; resolved 350+ defects sustaining 99.9% stability

Currently deepening expertise in:

• Payment systems security — PCI-DSS, HSM-backed KMS, token vault design
• High-availability Kafka patterns — idempotent consumers, exactly-once semantics, consumer lag management
• System design at scale — rate limiters, distributed caching, idempotency in payment APIs

🎓 M.Tech — NIT Warangal (GPA: 8.07/10) 🎓 B.Tech — NSUT West Campus, GGSIPU (GPA: 8.40/10) 🏆 GATE CE 2020 — AIR 3770 · 97th Percentile · Score 586 🥇 Gold Medal — Geotechnical Engineering Lab, IIT Bombay 2018 (Top 5%)