Senior Java Software Engineer

Position: Java Backend Developer

Experience: 5–8 years

Location: Mumbai / Bangalore

Team: Backend / Product-focused projects

Employment Type: Full-time

Note : Only Serving Notice period candidates who can join in 15 to 30 days can send their profiles on rutuja.patil@wissen.com

Job Summary

We are looking for a skilled Java Backend Developer to join our team in Mumbai/Bangalore. The candidate will work on product-based client projects, developing scalable backend services, handling high concurrency, and implementing best coding practices.

Key Responsibilities

• Develop and maintain backend services using Java, Spring Boot, and Hibernate
• Write clean, efficient, and maintainable code
• Implement multithreading, concurrency handling, and performance tuning
• Work with SQL/PLSQL and NoSQL databases
• Implement REST APIs / Microservices for client products
• Participate in code reviews, design discussions, and troubleshooting production issues
• Follow agile methodology and CI/CD pipelines

Required Skills

• Strong Core Java knowledge, including Collections, Generics, Exception Handling
• Hands-on experience with Java 8+ features (Streams, Optional, Lambdas)
• Strong understanding of Multithreading, Synchronization, Volatile, Locks, ExecutorService
• Experience in Spring Boot, Hibernate / JPA, Transaction Management
• Experience in SQL / Stored Procedures / Caching (EHCache)
• Understanding of Concurrent Collections (ConcurrentHashMap, CopyOnWriteArrayList)
• Familiarity with Microservices architecture, REST APIs
• Exposure to System Design basics and design patterns

Preferred Skills

• Experience with Cloud services (AWS/Azure/GCP)
• Experience with Docker/Kubernetes
• Knowledge of Virtual Threads in Java 21
• Previous work in product-based or high-concurrency projects

Soft Skills

• Good communication and problem-solving skills
• Ability to handle multiple rounds of interviews and technical discussions
• Motivated and proactive in learning new technologies

Selection Process

• 3–6 rounds (depending on the client/project)
• Technical evaluation including Core Java, Collections, Multithreading, Hibernate, SQL, DSA, System Design
• Manager / Client discussion