Backend Engineer

Neutron; Singapore; On-site; SGD 70,000 - 110,000; Full time

Job summary

Neutron is seeking a backend engineer to design, develop, and maintain secure, high-performance backend services and APIs using Java and Spring Boot. You will build and optimise data access layers, ensure data integrity across relational databases, and integrate the portal with internal systems and government services through secure interfaces.

You will implement validation, audit and reconciliation logic to support compliance and regulatory requirements, write clean, well-tested code, and

Qualifications

• Proficient in backend development with Java or Typescript.
• Strong understanding of OO design and data structures.
• Experience designing and consuming RESTful APIs.

Responsibilities

• Design, develop and maintain backend services and APIs using Java (Spring Boot) and related frameworks.
• Build data access layers and ensure data integrity across relational databases.
• Integrate portal with internal systems and government services via secure interfaces.
• Implement validation, audit and reconciliation logic for compliance.

Skills

Java

Typescript

REST APIs

SQL

Git

Security

CI/CD

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.