Lekshmi
Senior Java Backend Developer
Results-driven backend engineer with 5+ years architecting secure, high-availability microservices for banking and transport platforms handling 200,000+ transactions a day.
5+
Years Experience
200k+
Daily Transactions
99.9%
System Uptime
30%
Defect Reduction
Built for Reliability at Scale
Expert in Java 17, Spring Boot, and cloud-native practices with a proven track record in FinTech and transportation domains.
Backend Architecture
Java 17, J2EE, Spring Boot, Spring Security, Microservices Architecture, SOLID Principles, and API Design.
Database & Messaging
Oracle, MySQL, PostgreSQL, Hibernate ORM, Redis Caching, Asynchronous Processing (@Async), and Multithreading.
Quality & DevOps
CI/CD pipelines, Docker, Maven, JBoss FUSE, TDD, Postman Automation, and OWASP Security Reviews.
Technical Expertise
Core technologies and frameworks I work with.
Core & Frameworks
Data & Integration
Tooling & Quality
Professional Experience
Enterprise architecture, banking modules, and API development background.
Java Backend Developer
- Engineered 10+ enterprise-grade microservices using Java 17, Spring Boot, and REST APIs, serving 50,000+ daily active users.
- Implemented JWT-based authentication, Spring Security filters, and role-based access control (RBAC), reducing unauthorized access incidents by 100%.
- Optimized JPA/Hibernate ORM mappings with lazy loading, caching, and custom fetch strategies, cutting average query response time by 40%.
- Built scheduled jobs and async processing pipelines (@Async, Spring Scheduler) for real-time event handling with zero downtime deployments.
- Enforced CI/CD best practices using Maven and automated builds; maintained 99.9% application uptime in production.
Java Backend Developer
- Designed and delivered 20+ RESTful and SOAP APIs using Java, Spring Boot, and Spring MVC for core banking modules achieving 99.9% service availability.
- Developed microservices architecture integrated with JBoss FUSE for event-driven processing of 200,000+ daily banking transactions.
- Integrated external payment processors and third-party systems via secure APIs, fully compliant with RBI regulatory standards.
- Implemented multi-threading and concurrent transaction processing, handling peak loads of 5,000+ simultaneous users without performance degradation.
- Created automated Postman test suites with CI/CD integration, reducing manual QA time by 35% and accelerating release cycles.
Software Analyst
- Analyzed business requirements and designed API specifications for 8+ banking integration services using Java, Spring Boot, and REST/SOAP protocols.
- Developed API endpoints aligned with J2EE standards and Barclays' internal security protocols; participated in OWASP security reviews.
- Worked with Oracle and SQL Server databases, writing PL/SQL packages and analytical queries supporting regulatory reporting.
Let's Connect
Available for immediate hire. No sponsorship required.