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JAVA Backend Developer with API Expertise
Unison Group · Singapore
About The Role
We are looking for a Senior Java Backend Engineer to support and enhance our API and microservices ecosystem in a cloud-native AWS environment. This role focuses on BAU (Business-As-Usual) support, ensuring system stability, performance, and continuous improvement of backend services.
- Provide BAU support for Java-based microservices and APIs, ensuring high availability and reliability
- Design, develop, and maintain scalable microservices using Java (17+) and Spring Boot (3.x)
- Manage and support cloud infrastructure on AWS (ECS, EC2, RDS)
- Monitor system performance and troubleshoot issues using tools like Grafana and CloudWatch
- Implement and maintain CI/CD pipelines using GitLab, AWS CodeCommit, and CodePipeline
- Collaborate with cross-functional teams to resolve production issues and
deploy enhancements
- Support integration with identity and access management systems (Okta)
- Work with MuleSoft for API integrations and middleware support
- Ensure adherence to best practices in coding, security, and performance optimization
- Participate in incident management, root cause analysis, and continuous improvement initiatives
Requirements
- Experience with containerization and orchestration (Docker, Kubernetes)
- Exposure to security best practices in cloud environments
- Familiarity with Agile/Scrum methodologies
- Strong problem-solving and analytical skills
- Ability to work in a fast-paced BAU support environment
ROLE PROFILE
- Excellent communication and stakeholder management skills
- Proactive mindset with ownership of production system
- 8+ years of experience in Java backend development
- Strong expertise in Java 17+ and Spring Boot 3.x
- Proven experience in building and supporting microservices and REST/GraphQL APIs
- Hands-on experience with AWS services: ECS, EC2, RDS
- Experience with Infrastructure as Code (IaC)
- Proficiency in CI/CD pipelines using GitLab, AWS CodeCommit, and CodePipeline
- Strong knowledge of SQL, Oracle and relational databases
- Experience with monitoring and logging tools such as Grafana and AWS CloudWatch
- 3+ years of experience with Okta for authentication/authorization
- 3+ years of experience with MuleSoft for API integration
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