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JAVA Backend Developer with API Expertise

Unison Group
CompanyUnison Group
CategoryEngineering
LocationSingapore
RemoteOn-site (inferred)
EmploymentTemporary
LevelSenior
SalaryNot stated by the employer
Posted6 Jul 2026
Last verified30 Jul 2026
SourceEmployer career page (workable)
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Description
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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