Senior Java Backend Engineer - Cloud & Microservices

Helius Technologies; Singapore; On-site; SGD 140,000 - 190,000; Full time

Job summary

Helius Technologies is seeking a Senior Java Developer to design, develop, and maintain scalable backend services and APIs in a cloud-native AWS environment. You will work with engineering teams to deliver robust, secure solutions and contribute to production support, governance, and performance improvements.

The ideal candidate has 7+ years of Java backend experience, hands-on Java 17+ and Spring Boot 3.x, and strong skills in microservices, REST/GraphQL, AWS, CI/CD, and database systems.

Qualifications

• > 7+ years of Java backend development experience.
• Strong hands-on experience with Java 17+ & Spring Boot 3.x.
• Experience with 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.
• Good to Have: containerization and orchestration; security best practices; Agile/Scrum.

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.

Skills

Java backend

Java 17+

Spring Boot 3.x

Microservices

REST/GraphQL APIs

AWS (ECS/EC2/RDS)

CI/CD

IaC

SQL/Oracle

Okta authentication

MuleSoft/API integration

Docker/Kubernetes

Cloud security

Agile/Scrum

Tools

GitLab

AWS CodeCommit

CodePipeline

Grafana

AWS CloudWatch

MuleSoft

Okta

Docker

Kubernetes

Job description

Helius Technologies is seeking a Senior Java Developer to design, develop, and maintain scalable backend services and APIs in a cloud-native AWS environment. You will work with engineering teams to deliver robust, secure solutions and contribute to production support, governance, and performance improvements.

The ideal candidate has 7+ years of Java backend experience, hands-on Java 17+ and Spring Boot 3.x, and strong skills in microservices, REST/GraphQL, AWS, CI/CD, and database systems.