Role & responsibilities

Job Description: Senior Backend Engineer

Experience

5+ years

Role

Senior Backend Engineer / Java Backend Developer

Job Summary

We are looking for an experienced Backend Engineer with 5+ years of hands-on experience in Java, Spring Boot, and Microservices architecture. The ideal candidate should have strong problem-solving and Data Structures & Algorithms (DSA) skills, along with experience designing, developing, and maintaining scalable, high-performance backend systems.

Key Responsibilities

- Design, develop, and maintain scalable backend applications using Java and Spring Boot.

- Build and maintain RESTful APIs and microservices.

- Design distributed, fault-tolerant, and highly available services.

- Work with relational and NoSQL databases and optimize queries and application performance.

- Implement secure, reliable, and scalable backend services.

- Participate in system design, architecture discussions, and technical decision-making.

- Write clean, maintainable, testable, and production-ready code.

- Analyze and resolve performance, scalability, and production issues.

- Collaborate with frontend engineers, QA, DevOps, product managers, and other stakeholders.

- Conduct code reviews and mentor junior developers.

- Apply appropriate Data Structures and Algorithms to solve complex engineering problems.

Mandatory Technical Skills

Java

- Strong proficiency in Java 8/11/17+.

- Strong understanding of OOP, Collections, Generics, Exception Handling, Multithreading, and Java Memory Model.

- Good understanding of Java Streams, Lambda expressions, and functional programming.

- Experience with concurrency, synchronization, Executor Framework, and CompletableFuture.

Spring Boot

- Strong hands-on experience with Spring Boot.





- Spring MVC, Spring Data JPA, Spring Security.

- REST API development.

- Dependency Injection and Spring ecosystem fundamentals.

- Experience with configuration, profiles, Actuator, and application monitoring.

Microservices

- Strong understanding of Microservices architecture and design principles.

- Experience designing and developing production-grade microservices.

- Understanding of service discovery, API Gateway, load balancing, centralized configuration, and fault tolerance.

- Experience with inter-service communication using REST, messaging, or asynchronous mechanisms.

- Understanding of distributed systems concepts such as retries, timeouts, circuit breakers, idempotency, eventual consistency, and distributed transactions.

Data & Persistence

- Strong SQL skills and experience with databases such as MySQL/PostgreSQL/Oracle.

- Experience with JPA/Hibernate.

- Understanding of database indexing, query optimization, transactions, and normalization.

- Exposure to NoSQL databases such as MongoDB, Redis, or DynamoDB is a plus.

DSA & Problem Solving

- Strong understanding of Arrays, Strings, Linked Lists, Stacks, Queues, Hashing, Trees, Graphs, Heaps, and Tries.

- Knowledge of Sorting, Searching, Recursion, Dynamic Programming, Greedy algorithms, and Backtracking.

- Ability to analyze time and space complexity.

- Strong problem-solving and coding skills.

- Experience with Kafka/RabbitMQ or other messaging systems.

Qualifications

- 5+ years of professional software development experience.

- Strong analytical and problem-solving skills.

- Excellent communication and collaboration skills.

- Experience working in Agile/Scrum environments.

Preferred candidate profile

Perks and advantages

📌 Software Developer (Mumbai)
🏢 wissen technology
📍 Mumbai