Unison Group
Singapore / Global
Singapore / Global
We are looking for an experienced
Java Backend Developer
to design, develop, and maintain scalable backend services, APIs, and microservices within a cloud-native AWS environment.
The role will be responsible for developing robust and high-performing backend solutions, integrating with enterprise platforms and third-party systems, and continuously improving the reliability, scalability, security, and performance of backend applications. The developer will also contribute to production support, troubleshooting, and continuous improvement of existing services.
Key Responsibilities
Design and develop Java-based microservices and REST/GraphQL APIs using Java 17+ and Spring Boot 3.x
Build scalable, secure, and high-performance backend solutions
Develop integrations with MuleSoft, Okta, and enterprise systems
Deploy and manage applications on AWS (ECS, EC2, RDS)
Develop and maintain CI/CD pipelines using GitLab and AWS CodePipeline/CodeCommit
Work with SQL/Oracle databases and optimize queries and application performance
Monitor and troubleshoot applications using Grafana and AWS CloudWatch
Participate in production support, incident resolution, RCA, and continuous improvement
Collaborate with architects, DevOps, QA, and business teams throughout the SDLC
Requirements
7+ years of Java backend development experience
Strong hands-on experience with Java 17+ & Spring Boot 3.x
Strong experience in Microservices, REST/GraphQL APIs
Hands-on AWS: ECS, EC2, RDS
Experience with CI/CD: GitLab, AWS CodeCommit, CodePipeline
Experience with IaC and cloud deployment
Strong SQL/Oracle and relational database knowledge
Experience with Okta authentication/authorization
Experience with MuleSoft/API integration
Knowledge of Docker/Kubernetes is an advantage
Understanding of cloud security, monitoring, performance, and scalable application design
Good to Have
Experience with containerization and orchestration (Docker, Kubernetes)
Exposure to security best practices in cloud environments
Familiarity with Agile/Scrum methodologies
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