# Java Microservices API Developer

> Unison Group · Singapore, Singapore · Contract · Posted 2026-09-25

**Workplace:** on_site

**Department:** Manish

## Description

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

## Apply

[Apply at Unison Group](https://apply.workable.com/unisongroup/j/2EB9F245B9/apply)

---
Powered by [Workable](https://www.workable.com)