Headline

Java Backend Engineer | Spring Boot | Kafka | Redis | Microservices | Fintech

About

Java Backend Engineer with 2+ years of experience developing scalable backend systems and transaction-processing applications in the fintech domain using Java and Spring Boot. At Fiserv, I build and enhance backend services supporting high-volume financial transactions, optimize SQL performance, improve code quality through automated testing, and resolve critical production issues for banking applications. My expertise includes: • Java & Spring Boot • RESTful API Development • Microservices Architecture • Apache Kafka • Spring Security & JWT • Redis Caching • Hibernate & Spring Data JPA • SQL Optimization • JUnit & Mockito • Docker I enjoy designing reliable backend systems with a focus on scalability, performance, clean architecture, and distributed communication. Currently exploring advanced backend engineering concepts, distributed systems, concurrency, and scalable application design.

Location

Pune District

AI stack

claude code

github copilot

Devin

Work experience

Software Development Engineer at Fiserv, Aug 2024 - Present · 2 yrs 1 mo, Pune City, Maharashtra, India, - Engineered transactional REST APIs using Java and Spring Boot supporting 50k+ daily financial transactions across account, customer, and transaction-processing modules. - Improved backend service performance by optimizing SQL queries, indexing strategies, and transactional workflows, reducing API response latency by 12% and improving throughput by 15%. - Developed automated unit tests using JUnit and Mockito, increasing code coverage from 45% to 75% and reducing production defects by 25%. - Resolved critical CTR (Currency Transaction Report) compliance defect affecting 2,500+ monthly reports across 150+ financial institutions. - Fixed multi-year tax reporting defect impacting 10k+ retirement-plan customer accounts, eliminating manual reconciliation overhead. - Leveraged Devin and Claude AI to accelerate development of adapter-layer REST APIs built on existing backend services, improving feature delivery while ensuring adherence to internal architecture and coding standards. - Collaborated with cross-functional teams to debug production issues, optimize backend workflows, and improve transactional reliability in high-volume financial systems.

Analyst Trainee Intern at Axtria - Ingenious Insights, Jan 2024 - Jul 2024 · 7 mos, Pune District, Maharashtra, India, - Developed SQL validation scripts in Snowflake for large-scale analytics datasets, improving reporting reliability and validation coverage. - Identified and resolved ETL data inconsistencies affecting analytics pipelines and dashboard reporting. - Collaborated with engineering teams to troubleshoot data pipeline failures and improve transformation workflow reliability.

Education

Bachelor of Engineering - BE, Computer Engineering, Dr. D. Y. Patil Institute of Technology, Pimpri, Pune

Public links

github: https://github.com/lalit-patel

leetcode: https://leetcode.com/lalitpatel