Senior Backend Java Developer (Microservices)

Position Overview

We are seeking an experienced Senior Backend Java Developer with a specialised focus on microservices architecture, distributed systems, and backend engineering. In this role, you will design, build, and scale microservices-based RESTful APIs and enterprise backend components. You will focus on service communication, asynchronous messaging, optimising database interactions, and driving sound microservice design principles across the stack.

What you'll do

• Design, build, and maintain scalable microservices and distributed backend services using Java and the Spring / Spring Boot ecosystem.
• Implement clean microservice architectural patterns, domain-driven design, and reusable software modules.
• Author standard OpenAPI/Swagger documentation for REST endpoints and inter-service contracts.
• Leverage Java concurrency utilities and asynchronous messaging to ensure efficient application performance.
• Diagnose, debug, and resolve memory leaks, thread contention, and garbage collection bottlenecks in containerised environments.
• Design and optimise relational and NoSQL database schemas tailored for decoupled microservices.
• Manage data persistence and transactional boundaries across distributed services using Spring Data JPA.
• Write tuned SQL queries, establish effective database indexing, and configure caching strategies (e.g., Redis).
• Implement robust microservice resiliency patterns including Circuit Breakers, Rate Limiting, and Retry policies.
• Implement standard API and service security mechanisms (OAuth2, JWT authentication, authorisation, and data sanitisation).
• Build structured logging, health checks, and application metrics using standard logging frameworks.
• Write clean, maintainable, modular, and unit-tested microservice code using JUnit and Mockito.
• Participate in code reviews, technical architecture reviews, and maintain test coverage across application modules.

What you'll need

• 5+ years of hands-on software development experience using Java with deep knowledge of Collections, Streams API, Multithreading/Concurrency, and Exception Handling.
• Strong expertise in Spring Boot, Spring Core, Spring MVC, and dependency injection paradigms.
• Deep understanding of microservices architecture, distributed systems design principles, and RESTful architectural styles.
• Advanced proficiency in Spring Data JPA, raw SQL query tuning, and database migration tooling.
• Practical, hands-on experience with message brokers and event streaming architectures.
• Solid grasp of Design Patterns, TDD/unit testing principles (JUnit, Mockito), containerization basics, and CI/CD deployment pipelines.

Preferred Qualifications

• Experience with service mesh technologies and cloud-native observability tools.
• Familiarity with major cloud platforms and managed container orchestration services.
• Experience with caching layers, distributed synchronization, and event-driven patterns.