Senior Java Backend Engineer

Job Description:

Senior Java Backend Engineer (L3)

6-10 Years Experience

Full-Time | Bangalore, India

Onsite (Mon-Fri)

Who Is InRhythm?

InRhythm (www.inrhythm.com) is a leading modern product consultancy and digital innovation firm with a mission to make a dent in the digital economy. Founded in 2002, InRhythm is currently engaged by Fortune 50 enterprises to bring their next generation of digital products and platforms to market. InRhythm has helped hundreds of teams launch mission-critical products that have created a positive impact worth billions of dollars.

InRhythms unique capabilities of Product Innovation and Platform Modernization services are the most sought-after in the industry. An Inc. 5000 Hall of Fame Fastest Growing Company for 9 years, Deloitte Fast 500 company for 5 years, and Consulting Magazine Fastest Growing Company winner several years in a row.

Our clients include a broad range of highly visible enterprises including Goldman Sachs, Fidelity, Morgan Stanley, Mastercard, American Express, and BlackRock.

About the Role

We are seeking a talented and driven Senior Java Backend Engineer (L3) to join our engineering team. In this role, you will be a key individual contributor responsible for designing, developing, and owning critical backend services and components. You will work alongside senior architects and leads to build high-performance, reliable systems while demonstrating technical ownership, mentoring junior engineers, and contributing to engineering best practices.

This is an individual contributor role with technical influence you’ll be expected to independently drive feature delivery, make sound design decisions, and raise the bar for engineering quality.

Key Responsibilities

• Design, develop, and maintain scalable Java-based backend services, APIs, and data pipelines.
• Own feature delivery end-to-end – from technical design through implementation, testing, deployment, and monitoring.
• Build and optimize microservices using Spring Boot, Spring Cloud, and event-driven architectures.
• Write clean, well-tested, production-ready code following SOLID principles and design patterns.
• Collaborate with product managers, UX designers, and frontend engineers to define and deliver product requirements.
• Participate actively in architecture discussions, design reviews, and sprint planning.
• Conduct thorough code reviews and provide constructive, actionable feedback to peers.
• Mentor junior engineers (L1/L2) through pairing sessions, knowledge transfers, and

technical guidance.

• Troubleshoot and resolve production issues; improve system observability, performance, and reliability.
• Contribute to CI/CD pipeline improvements and DevOps best practices.
• Stay current with industry trends, evaluate new tools/frameworks, and recommend adoption where appropriate.
• Write and maintain technical documentation for systems, APIs, and runbooks.

Must-Have Qualifications

• 5–8 years of professional Java backend development experience (Java 11 / 17 / 21).
• Strong expertise in Spring Boot, Spring MVC, Spring Security, and Hibernate/JPA.
• Solid experience designing and building RESTful APIs and microservices architectures.
• Proficiency with relational databases (PostgreSQL, MySQL, Oracle) – query optimization, indexing, schema design.
• Working knowledge of NoSQL databases (Redis, MongoDB, or Cassandra).
• Hands-on experience with messaging systems – Apache Kafka, RabbitMQ, or ActiveMQ.
• Experience with containerization and orchestration (Docker, Kubernetes).
• Strong fundamentals in data structures, algorithms, and object-oriented design.
• Proficiency with Git, CI/CD pipelines (Jenkins, GitHub Actions, GitLab CI).
• Experience writing unit tests, integration tests, and practicing TDD (JUnit 5, Mockito, TestContainers).
• Good understanding of concurrency, multithreading, and JVM internals.
• Strong communication and collaboration skills in an Agile/Scrum environment.

Nice-to-Have Qualifications

• Experience in financial services, fintech, or capital markets domain.
• Familiarity with cloud platforms – AWS (EC2, S3, Lambda, SQS, RDS) or GCP.
• Knowledge of Infrastructure as Code (Terraform, CloudFormation).
• Experience with GraphQL or gRPC APIs.
• Exposure to reactive programming – Project Reactor or RxJava.
• Familiarity with observability tools – Prometheus, Grafana, ELK Stack, Datadog.
• Experience with Kotlin or Python as a secondary language.
• Contributions to open-source projects.

Tech Stack

Java 17/21, Kotlin

Frameworks

Spring Boot, Spring Cloud, Hibernate

Databases

PostgreSQL, MySQL, Redis, MongoDB

Messaging

Apache Kafka, RabbitMQ

Testing

JUnit 5, Mockito, TestContainers

DevOps

Docker, Kubernetes, Jenkins, GitHub Actions

Cloud

AWS / GCP

Observability

Prometheus, Grafana, ELK Stack