# Senior Java Backend Developer

> Unison Group · Singapore, Singapore · — · Posted 2026-06-22

**Workplace:** on_site

## Description

### Role Overview

We are looking for an experienced **Senior Java Backend Developer** with strong expertise in **Java 17+, Spring Boot 3.x, REST API development, and Microservices Architecture**. The ideal candidate will be responsible for designing, developing, deploying, and supporting scalable backend applications in a cloud environment. The role requires hands-on experience with AWS services, CI/CD pipelines, database technologies, and production support activities.

### Key Responsibilities

-   Design, develop, and maintain high-performance backend applications using **Java 17+ and Spring Boot 3.x**.
-   Develop and integrate scalable **RESTful APIs** following industry best practices.
-   Build and maintain applications based on **Microservices Architecture**.
-   Implement secure, reliable, and scalable backend solutions.
-   Work with AWS cloud services including **ECS, EC2, RDS, and CloudWatch** for application deployment, monitoring, and troubleshooting.
-   Develop and manage **CI/CD pipelines** using GitLab and Infrastructure as Code (IaC) practices.
-   Collaborate with DevOps teams to automate build, deployment, and release processes.
-   Work with **Oracle and SQL databases**, including database design, queries, optimization, and troubleshooting.
-   Perform code reviews, debugging, performance tuning, and application enhancements.
-   Provide **Production Support / BAU Support** for business-critical applications.
-   Manage incidents, perform root cause analysis (RCA), and implement permanent fixes.
-   Collaborate with cross-functional teams including QA, DevOps, Product Owners, and Business stakeholders.

### Required Skills & Experience

-   6+ years of experience in **Java Backend Development**.
-   Strong hands-on experience with **Java 17+**.
-   Extensive experience with **Spring Boot 3.x**.
-   Strong understanding of **REST API development and integration**.
-   Proven experience working with **Microservices Architecture**.
-   Hands-on experience with AWS services:

-   **Amazon ECS**
-   **Amazon EC2**
-   **Amazon RDS**
-   **Amazon CloudWatch**

-   Experience with **GitLab CI/CD pipelines** and automation.
-   Knowledge of **Infrastructure as Code (IaC)** concepts.
-   Strong SQL skills with experience in **Oracle databases**.
-   Experience in production application support and incident management.
-   Good understanding of Agile development methodologies.
-   Strong analytical and problem-solving skills.

### Good to Have

-   Experience with container technologies such as Docker/Kubernetes.
-   Knowledge of cloud security best practices.
-   Experience with monitoring and logging tools.
-   Exposure to enterprise-scale applications and high-availability systems.

## Apply

[Apply at Unison Group](https://apply.workable.com/unisongroup/j/3F3B7A7397/apply)

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