JAVA Backend Developer with API Expertise

Unison Group; Singapore; On-site; SGD 90,000 - 120,000; Full time

Job summary

Unison Group is seeking a Senior Java Backend Engineer in Singapore to enhance our API and microservices ecosystem in a cloud-native AWS environment. The role will focus on providing BAU support, ensuring system stability and performance, and continuous improvement of backend services.

Ideal candidates should have 8+ years of experience in Java backend development, strong expertise in Java 17+ and Spring Boot 3.x, and proven experience building and supporting microservices.

Qualifications

• 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.

Responsibilities

• Provide BAU support for Java-based microservices and APIs.
• Design, develop, and maintain scalable microservices using Java and Spring Boot.
• Manage and support cloud infrastructure on AWS.

Skills

Java 17+

Spring Boot 3.x

AWS (ECS, EC2, RDS)

Microservices

CI/CD pipelines

Docker

Kubernetes

Okta

MuleSoft

Monitoring tools (Grafana, CloudWatch)

Agile/Scrum methodologies

SQL

Problem-solving

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.

Responsibilities

• 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