Backend Engineer

NEUTRON PTE. LTD.; Singapore; On-site; SGD 90,000 - 130,000; Full time

Job summary

NEUTRON PTE. LTD. is seeking a backend engineer to design, develop and maintain secure, high-performance services and APIs using Java and related frameworks.

You will ensure data integrity for tax submissions, and integrate the portal with internal systems and government services in a secure manner. The role requires strong OO design, RESTful APIs, relational database proficiency, and Git workflows, with a focus on secure coding practices and cross-functional collaboration to deliver compliant,

Qualifications

• Backend experience in Java or Typescript, with Java preferred
• Strong OO design, data structures and software fundamentals
• Experience designing and consuming RESTful APIs
• Working with relational databases (PostgreSQL, Oracle or MySQL) and SQL
• Git and collaborative development workflows
• Secure coding practices for handling sensitive data
• Strong problem-solving and clear communication to stakeholders

Responsibilities

• Design, develop and maintain secure, high-performance backend services and APIs using Java and frameworks (e.g. Spring Boot)
• Build and optimise data access layers ensuring accuracy and integrity of tax submission data
• Integrate the portal with internal systems and whole-of-government services via secure interfaces
• Implement validation, audit and reconciliation logic for compliance
• Write clean, well-tested code with unit/integration/automation tests
• Participate in code reviews, technical design discussions and architecture decisions
• Troubleshoot and resolve production issues across the platform lifecycle
• Collaborate with product, business analysts, security and operations to deliver policy-aligned features

Skills

Java

Typescript

RESTful APIs

Object-oriented design

Tools

Git

Docker

CI/CD pipelines

Job description

Key Responsibilities

• Design, develop and maintain secure, high-performance backend services and APIs for the Portal using Java and related frameworks (e.g. Spring Boot).
• Build and optimise data access layers, ensuring the accuracy and integrity of tax submission data across relational databases.
• Integrate the portal with internal systems and whole-of-government services through well-defined, secure interfaces.
• Implement validation, audit and reconciliation logic to support compliance and regulatory requirements.
• Write clean, well-tested and maintainable code, with appropriate unit, integration and automated tests.
• Participate in code reviews, technical design discussions and architecture decisions.
• Troubleshoot, debug and resolve production issues, supporting the platform through its full operational lifecycle.
• Collaborate with product owners, business analysts, security teams and operations to deliver features that meet user and policy needs.

Requirements

• Solid hands‑on experience building backend services in Java or Typescript. Strong experience in another modern object‑oriented or JVM language will also be considered, with a clear willingness to work primarily in Java.
• Good understanding of object‑oriented design, data structures and software engineering fundamentals.
• Experience designing and consuming RESTful APIs.
• Working knowledge of relational databases (e.g. PostgreSQL, Oracle or MySQL) and SQL.
• Familiarity with version control (Git) and collaborative development workflows.
• Sound appreciation of application security, data protection and secure coding practices, as the role involves handling sensitive tax and personal data.
• Strong problem‑solving skills and the ability to communicate technical concepts clearly to both technical and non‑technical stakeholders.

Good to Have

• Experience with the Spring / Spring Boot ecosystem.
• Experience with microservices, message queues or event‑driven architectures.
• Familiarity with CI/CD pipelines, containerisation (Docker), and cloud or on‑premise government platforms.
• Exposure to automated testing frameworks (e.g. JUnit, Mockito).
• Prior experience delivering systems in the public sector, financial services or another regulated environment.