Senior Java Server-side Engineer

We are looking for a Senior Java Server-side Engineer to develop and enhance a Backend-for-Frontend service layer that drives high-traffic mobile experiences for clients around the globe. You will work alongside engineers, product partners, designers, and QA to ship dependable APIs and top-tier code. Join us to help shape the next wave of mobile platforms! Responsibilities Architect and develop the Backend-for-Frontend API layer consumed by mobile applications Build REST endpoints and service contracts that enable mobile user journeys Enhance service performance via profiling, analysis, and focused improvements Rework legacy code to boost maintainability, readability, and reliability Produce clean, testable code and sustain strong unit test coverage Connect with existing backend services and manage bespoke and legacy dependencies Resolve defects by identifying root causes and delivering safe, timely patches Partner with engineers, product partners, designers, and QA to ship features Support CI workflows and build tooling to keep delivery running smoothly Exchange ideas and champion great user experience through API and data design Eliminate unnecessary code and cut technical debt to keep the codebase healthy Requirements Qualifications in Computer Science or related field (Bachelor’s), or equivalent experience 3+ years of experience building server-side applications in Java Competency in solution design for open-ended problems Expertise in Spring Boot for building and maintaining services Proficiency in REST API development, including integration with legacy services Knowledge of algorithms and data structures for efficient implementations Skills in unit testing with a test-driven mindset Familiarity with build tools and experience with CI workflows Capability to analyze and optimize performance for backend services Proficiency in troubleshooting for debugging and fixing production issues Showcase of self-starter mindset with ownership and proactive communication Skills in senior-level collaboration with cross-functional teams Proficiency in English at an Upper-Intermediate level (B2) or higher Nice to have Skills in Docker for containerizing and running services locally and in pipelines Background in Gradle for builds and dependency management Familiarity with GraphQL for designing and consuming GQL APIs Proficiency in Kotlin for server-side development on the JVM Knowledge of RAML for API modeling and documentation