Senior Java Developer

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

At Helius Technologies, we help organisations deliver technology outcomes that work in the real world. Our teams support complex technology initiatives across Asia and the Middle East particularly in regulated and enterprise environments where reliability, governance, and execution matter.

Our focus is simple: to be a trusted partner in technology transformation — delivering outcomes reliably and built to last.

We are currently looking for a Senior Java Developer to join our team.

In this role, you will work with engineering teams, stakeholders, and delivery leads to support the execution of technology initiatives. The role is suited to professionals who combine strong technical capability with a structured and accountable approach to delivery.

We value individuals who bring depth, accountability, and a strong commitment to quality.

Role Overview

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.

Job Requirement:

• 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

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.

Why Join Helius:

At Helius Technologies, you will work on complex technology initiatives with leading enterprises across Asia and the Middle East, alongside a diverse and experienced engineering community.

You will collaborate with 1,000+ technology professionals across a regional delivery network spanning 7 countries, supporting enterprise clients in BFSI, healthcare, and the public and private sectors, backed by 20+ years of enterprise technology delivery experience.

We operate in environments where reliability, accountability, and disciplined execution matter — and where strong engineering and structured delivery come together to drive meaningful outcomes.

Singapore -Malaysia- India - Thailand – Japan