SENIOR Java Backend Developer

United States Digital Space LLC; Singapore; On-site; SGD 70,000 - 90,000; Full time

Job summary

United States Digital Space LLC is seeking a Senior Java Backend Developer based in Singapore. The successful candidate will design and develop scalable backend applications using Java 17+ and Spring Boot 3.x, while also managing and supporting cloud-based solutions.

With at least 6 years of experience, you will integrate RESTful APIs, implement CI/CD pipelines, and collaborate effectively with cross-functional teams. The ideal candidate will also have a solid foundation in AWS services and incident management.

Qualifications

• 6+ years of experience in Java Backend Development.
• Strong hands-on experience with Java 17+.
• Proven experience working with Microservices Architecture.

Responsibilities

• Design, develop, and maintain high-performance backend applications.
• Develop and integrate scalable RESTful APIs.
• Provide Production Support for business-critical applications.

Skills

Java Backend Development

Spring Boot 3.x

REST API development

Microservices Architecture

AWS services

GitLab CI/CD

Infrastructure as Code (IaC)

SQL

Oracle databases

Agile methodologies

Tools

Docker

Kubernetes

Job 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, EC2, RDS, 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.