Manish Dubey

Java Backend Developer with 3+ years of experience in designing and developing scalable enterprise applications using Core Java, Spring Boot, and Microservices architecture. Strong expertise in OOPs principles, multithreading, collections framework, Java 8 features, and design patterns. Proven ability to optimize performance, debug production issues, and write clean, maintainable code following SOLID principles.

Backend Developer - Tata Consultancy Services (TCS) - Mumbai, Maharashtra, India

(2022-11 - 2026-03)

• Designed and developed scalable backend services using Core Java, OOPs principles, and Spring Boot.
• Implemented complex business logic using Collections Framework (HashMap, ConcurrentHashMap, Streams API).
• Utilized Java 8 features such as Lambda expressions, Streams, and Optional for efficient data processing.
• Implemented multithreading using ExecutorService and CompletableFuture to improve asynchronous processing.
• Applied SOLID principles and design patterns (Factory, Singleton, Strategy) to ensure clean and maintainable code.
• Optimized SQL queries and reduced API response time by improving indexing and query execution plans.
• Debugged production issues using logs, thread dumps, and JVM monitoring tools.
• Implemented exception handling strategy using custom exceptions and global handlers.
• Containerized applications using Docker and supported CI/CD pipelines.

Backend Developer - Tata Consultancy Services (TCS)

(2022-11 - 2026-03)

On-site

• backend modules using Core Java and Spring Boot following OOP design principles.
• Designed secure authentication workflows using role-based access control.
• Utilized Java Collections and Stream API for efficient data transformation and filtering.
• Implemented reusable utility components using design patterns like Builder and Singleton.
• Improved performance of critical APIs by optimizing database interactions and reducing memory overhead.
• Assisted in debugging production issues using logs, exception tracing, and performance monitoring tools.
• Collaborated with clients during requirement analysis and defect resolution.

Bachelor's degree - Patkar Varde College, Mumbai (2020)

Diploma in Engineering (2018)