[8BE] Senior Back End Engineer

Role Summary
We are seeking a Senior Developer to design and build backend services for a client's e-commerce platform, built on a distributed microservices architecture with event driven communication between services. This role covers hands-on development across the service layer, from domain modeling through API design to production deployment, working within an established clean architecture pattern and collaborating closely with architects, QA, and other developers on the team.

Key Responsibilities

• Service development: Design and implement backend microservices following clean architecture principles (domain, application, infrastructure, and API layers), ensuring clear separation of concerns and testability.
• API design: Build and maintain REST and/or GraphQL APIs, defining data contracts and ensuring consistent request and response models across services.
• Event driven integration: Implement and consume event driven flows across message queues (e.g., AWS SQS/SNS style publish/subscribe), including webhook handling, retry logic, and error handling.
• Data modeling and persistence: Design data models and implement persistence logic against NoSQL and/or relational databases, applying appropriate patterns (repository, unit of work) for testability and maintainability.
• Authentication and authorization: Implement JWT based authentication and authorization flows, integrating with identity providers such as Keycloak or an equivalent service.
• Testing: Write unit, integration, and BDD style tests to ensure code quality and prevent regressions, and maintain test coverage as services evolve.
• CI/CD and deployment: Build and maintain CI/CD pipelines for build, test, and deployment to cloud infrastructure, including containerized services on managed platforms such as AWS ECS.
• Code review and mentorship: Participate in code reviews, uphold engineering standards, and mentor less experienced developers on the team.
• Cross service collaboration: Work with architects, QA, and other developers to resolve integration gaps, clarify requirements, and deliver features across multiple services within sprint timelines.