Leena Singh

Backend Developer

2+ yrs exp 85 · Excellent

About

Backend Developer with 2 years of experience in Java and Spring Boot, specializing in RESTful APIs, microservices architecture and secure backend systems. Currently at Tata Consultancy Services (TCS), delivering cloud-ready backend solutions with measurable business impact, including a 40% reduction in manual processing, 25% faster API response times, and 20% fewer production defects. Skilled in AWS EC2 deployment, Docker containerization, CI/CD pipelines (GitHub Actions), Agile/Scrum methodologies, and JWT-based authentication.

Skills & Expertise (30)

Spring Boot Intermediate

6.8/10

Years Exp

RESTful API Design Intermediate

6.5/10

Years Exp

Java Intermediate

6.5/10

Years Exp

Scrum Intermediate

6.5/10

Years Exp

Agile Intermediate

6.5/10

Years Exp

Maven Intermediate

6.5/10

Years Exp

Git Intermediate

6.5/10

Years Exp

IntelliJ IDEA Intermediate

6.5/10

Years Exp

JUnit Intermediate

6.5/10

Years Exp

Jenkins Intermediate

6.5/10

Years Exp

GitHub Actions Intermediate

6.5/10

Years Exp

Kubernetes Intermediate

6.5/10

Years Exp

Docker Intermediate

6.5/10

Years Exp

AWS EC2 Intermediate

6.5/10

Years Exp

Postgresql Intermediate

6.5/10

Years Exp

MySql Intermediate

6.5/10

Years Exp

Postman Intermediate

6.5/10

Years Exp

JWT Authentication Intermediate

6.5/10

Years Exp

Spring Security Intermediate

6.5/10

Years Exp

Hibernate Intermediate

6.5/10

Years Exp

Spring Data JPA Intermediate

6.5/10

Years Exp

Microservices Architecture Intermediate

6.5/10

Years Exp

REST APIs Intermediate

6.5/10

Years Exp

Spring Cloud Intermediate

5.8/10

Years Exp

OpenFeign Intermediate

5.5/10

Years Exp

TestNG Intermediate

5.5/10

Years Exp

Gradle Intermediate

5.5/10

Years Exp

RBAC Intermediate

5.5/10

Years Exp

Openapi Swagger

Work Experience

System Engineer

Tata Consultancy Services (TCS)

Jun 2024 - Present

Engineered a credit card application and approval system using Java, Spring Boot, and REST APIs, automating multi-stage workflows and reducing manual processing effort by 40%, saving approximately 20 engineering hours per week. Implemented eligibility validation and approval logic (Approved/Pending/Rejected) using Spring Data JPA and Hibernate, improving application processing efficiency by 30%. Secured backend services with Spring Security and JWT-based authentication, enabling role-based access control (RBAC) and eliminating unauthorized access incidents. Optimized database queries and transaction handling, reducing API response times from ~800ms to ~600ms (25% improvement) and cutting infrastructure costs by reducing unnecessary compute load. Containerized services using Docker and deployed on AWS EC2, enabling consistent environments across dev and staging with zero environment-related defects. Built and maintained RESTful APIs with Swagger/OpenAPI documentation; set up CI/CD pipeline via GitHub Actions to automate builds, tests, and deployments. Conducted end-to-end API testing using Postman and JUnit within Agile/Scrum sprints, reducing production defects by 20% and ensuring 99.9% uptime post-deployment. Collaborated with frontend and QA teams across Agile sprints, aligning delivery to business goals and contributing to a 15% improvement in feature release velocity.