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JAVA Backend Developer with API Expertise

UNISON Group

Singapore, SGonsitePosted Jul 6, 2026
Posting intelligenceActively listedReposted 24×, possible evergreen/ghost posting

Skills

kubernetesgrafanaspringdockeroraclegitlabcicdjavaawsecs

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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