Senior Java Developer
NETS Group, operator of Singapore's national debit scheme, is hiring a Senior Java Developer in Braddell to design, build, and maintain backend applications for its UPOS & DA payment portfolio using Java 17, Spring Boot, REST APIs, Solace JMS, and SQL databases — with focus on low-latency, secure, high-volume payment processing, modernization, and production support.
- Compensation
- Not disclosed
- Location
- Braddell, SG
- Work setup
- Not specified
- Seniority
- Senior
- Employment
- Not specified
- Experience
- 8+ years
- Category
- Software engineering
- Posted
Skills
Must have
- Bachelor's degree in Computer Science, IT, Software Engineering, or related discipline
- Minimum 8–10 years of relevant application development experience across full SDLC, including senior developer or technical lead capacity
- Strong proficiency in Java 17+, server-side Java technologies, Spring Framework, and Spring Boot
- Strong experience designing and developing microservices, RESTful APIs, web services, distributed applications, and SOA
- Hands-on experience with Linux/RHEL, Spring Boot, Solace JMS, MySQL or PostgreSQL, SSL/TLS, and JSON-based interfaces
- Good understanding of OOP, design patterns, secure coding practices, unit testing, and performance optimization
- Experience developing or supporting low-latency, high-throughput, highly available, business-critical transaction processing systems
- Experience with Agile and Waterfall methodologies and tools such as Git, Jenkins, JIRA, Maven or Gradle, and automated testing frameworks
- Experience with CI/CD pipelines, application monitoring, log analysis, observability, production deployment, incident resolution, and root cause analysis
- Strong analytical, problem-solving, communication, stakeholder-management, and technical leadership skills
- Proactive, collaborative team player able to work independently in a fast-paced, regulated environment
- Ability to manage multiple priorities, guide other developers, and support business-critical application delivery
Nice to have
- Experience with container or cloud deployments such as Docker, Kubernetes, OpenShift, or AWS
- Experience in payment systems: online payment transaction flows, transaction switching, retail POS, e-commerce, card authorization, or payment gateway integration
- Working knowledge of PCI-DSS, payment security controls, encryption, cryptographic concepts, SSL/TLS, access control, and audit requirements
Full description
The NETS Group is a leading payments services group, enabling digital payments for merchants, consumers and banks across the entire payments value chain.
The Group operates Singapore’s national debit scheme enabling customers of DBS Bank/POSB, HSBC, Maybank, OCBC Bank, Standard Chartered Bank and UOB to make payments using their ATM cards or mobile devices at more than 130,000 acceptance points in the country as well as online payments.
Position Summary
We are seeking an experienced Senior Java Developer to design, develop, and maintain backend applications using Java and the Spring Boot framework for the UPOS & DA application portfolio. The role contributes to the delivery of projects and change requests while ensuring the reliability, performance, security, and maintainability of existing applications.
The successful candidate will work closely with developers, technical leads, product owners, business stakeholders, QA, DevOps, cybersecurity, and production support teams to translate business requirements into secure, scalable, and reliable technical solutions. The candidate will also provide technical guidance to other developers, support application modernization, troubleshoot production issues, and implement bug fixes and continuous improvements.
The ideal candidate will demonstrate strong expertise in Java backend development, Spring Boot, RESTful APIs, distributed systems, and database technologies. Knowledge of online payment transaction flows and experience with high-volume, mission-critical payment platforms will be a distinct advantage.
Responsibilities:
- Lead and participate in requirement analysis, solution design, technical estimation, development planning, and implementation for UPOS & DA application initiatives.
- Translate business and user requirements into clear functional and technical specifications that meet business, security, performance, and operational requirements.
- Design, develop, test, and maintain secure, scalable, low-latency, and highly available backend applications using Java, Spring Boot, RESTful APIs, Solace JMS, and database technologies.
- Develop new business features and reusable software components in accordance with approved technical specifications, coding standards, secure development practices, and organizational policies.
- Contribute to application modernization and migration initiatives, including legacy application transformation, Java and Spring Boot framework modernization, and deployment to RHEL, container, or cloud environments.
- Review application architecture, source code, database design, interfaces, and deployment approaches to ensure quality, maintainability, performance, resilience, and operational readiness.