Senior Backend Engineer - Java / Spring Boot APIs (KLI-102)

• Design, build, and maintain RESTful APIs in Java / Spring Boot that power a multi-tenant SaaS platform: endpoints, validation, pagination/sorting/filtering, reporting and dashboard data, audit trails.
• Own the data layer end to end: JPA entities, DAOs and repositories, native queries, views, and stored procedures across MySQL, SQL Server, and PostgreSQL. Design schemas and tune slow queries.
• Harden tenant isolation, authentication, and authorization so every request sees only the data it is entitled to.
• Refactor and decompose large legacy services into well-bounded, testable components without disrupting production.
• Write unit and integration tests, and raise the bar on coverage, structured logging, and error handling.
• Define and document API contracts (OpenAPI/Swagger) and work with front-end engineers (TypeScript) to keep them in sync.
• Give and receive thorough code reviews, and use AI coding assistants as part of the daily workflow while reviewing their output with the same rigor as any other contributor's.
• Ship through a Bitbucket pull-request and Jira ticket workflow to AWS (ECS), and help resolve production issues.

Responsibilities

• Design, build, and maintain RESTful APIs in Java / Spring Boot that power a multi-tenant SaaS platform: endpoints, validation, pagination/sorting/filtering, reporting and dashboard data, audit trails.
• Own the data layer end to end: JPA entities, DAOs and repositories, native queries, views, and stored procedures across MySQL, SQL Server, and PostgreSQL. Design schemas and tune slow queries.
• Harden tenant isolation, authentication, and authorization so every request sees only the data it is entitled to.
• Refactor and decompose large legacy services into well-bounded, testable components without disrupting production.
• Write unit and integration tests, and raise the bar on coverage, structured logging, and error handling.
• Define and document API contracts (OpenAPI/Swagger) and work with front-end engineers (TypeScript) to keep them in sync.
• Give and receive thorough code reviews, and use AI coding assistants as part of the daily workflow while reviewing their output with the same rigor as any other contributor's.
• Ship through a Bitbucket pull-request and Jira ticket workflow to AWS (ECS), and help resolve production issues.

Qualifications

• 5+ years of professional backend development in Java, with deep hands-on Spring Boot experience (Spring MVC, Spring Data JPA, Spring Security).
• A track record of designing and building RESTful APIs for business applications: contracts, versioning, validation, pagination, error semantics.
• Strong relational database skills: schema design, JPA/Hibernate mappings, native SQL, query optimization. Hands-on with more than one of MySQL, SQL Server, PostgreSQL.
• Working knowledge of TypeScript: enough to read a front-end codebase, debug API consumption, and make small changes.
• Experience working in and improving large, mature codebases: breaking up oversized services, adding tests, untangling dependencies.
• Solid grasp of API security: authentication and authorization, multi-tenancy, input validation, secrets handling.