Senior Java Server-side Engineer

We are seeking a Senior Server-side Engineer to build and evolve a Backend-for-Frontend service layer that powers high-traffic mobile experiences for clients worldwide. You will collaborate with engineers, product partners, designers, and QA to deliver reliable APIs and high-quality code. Apply to help shape the next generation of mobile platforms.

Responsibilities

• Design and build the Backend-for-Frontend API layer used by mobile applications
• Implement REST endpoints and service contracts that support mobile user flows
• Optimize service performance through profiling, analysis, and targeted improvements
• Refactor legacy code to improve maintainability, readability, and reliability
• Write clean, testable code and maintain strong unit test coverage
• Integrate with existing backend services and handle bespoke and legacy dependencies
• Fix defects by diagnosing root causes and shipping safe, timely patches
• Collaborate with engineers, product partners, designers, and QA to deliver features
• Contribute to CI workflows and build tooling to keep delivery smooth
• Share ideas and advocate for great user experience through API and data design
• Remove unnecessary code and reduce technical debt to keep the codebase healthy

Requirements

• 3+ years of Java experience building server-side applications
• Senior-level collaboration skills working with cross-functional teams
• Strong solution design skills for open-ended problems
• Strong Spring Boot expertise for building and maintaining services
• Strong REST API development skills, including integration with legacy services
• Strong algorithms and data structures knowledge for efficient implementations
• Strong unit testing skills and test-driven mindset
• Build tools knowledge and experience with CI workflows
• Performance analysis and optimization skills for backend services
• Strong troubleshooting skills for debugging and fixing production issues
• Self-starter mindset with ownership and proactive communication
• Bachelor’s degree in Computer Science or related field, or equivalent experience
• Upper-Intermediate English proficiency (B2) for effective communication

Nice to have

• Docker skills for containerizing and running services locally and in pipelines
• Gradle experience for builds and dependency management
• GraphQL experience for designing and consuming GQL APIs
• Kotlin experience for server-side development on the JVM
• RAML experience for API modeling and documentation