JAVA Backend Developer with API Expertise

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JAVA Backend Developer with API Expertise

Unison Group

Location

Singapore, Singapore, Singapore

Experience

Senior

Posted

Jul 7, 2026

Apply by

August 6, 2026

Applicants

0

Early applicantTemporaryWork from Office

Job 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 • 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

Key Responsibilities

  • Provide BAU support for Java-based microservices and APIs to ensure 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 including ECS, EC2, and RDS
  • Monitor system performance and troubleshoot issues using 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 such as 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

Skills Required

Java 17+Spring Boot 3.xAWSECSEC2RDSGrafanaCloudWatchGitLabAWS CodeCommitCodePipelineOktaMuleSoftDockerKubernetesSQLOracleREST APIsGraphQL APIsInfrastructure as CodeAgileScrumProblem-solvingAnalytical skillsCommunicationStakeholder managementProactive mindsetOwnership

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