Title:  Senior Software Engineer

About ST Engineering

ST Engineering is a global technology, defence, and engineering group with offices across Asia, Europe, the Middle East, and the U.S., serving customers in more than 100 countries where it operates a diverse portfolio of businesses across the aerospace, smart city, defence, and public security segments. Headquartered in Singapore, ST Engineering ranks among the largest companies listed on the Singapore Exchange.

Our history spans more than 50 years, and our strategy is underpinned by our core values – Integrity, Value Creation, Courage, Commitment and Compassion. These 5 core values guide every aspect of our business and are embedded in our ST Engineering culture – from the people we hire, to working with each other, to our partners and customers.

About Codex Solutions  

A joint venture company by ST Engineering Mission Software & Services Pte. Ltd. and HTX (Home Team Science and Technology Agency), Codex Solutions is set up to be a dynamic and forward-looking technology company established to develop cutting-edge software solutions that support and strengthen Singapore’s homeland security efforts. As a mission-driven organisation, we are focused on building strong in-house capabilities that directly address the complex challenges faced by the Home Team.

With a strong emphasis on innovation, product excellence, and impact at scale, Codex Solutions offers a unique environment where purpose meets technology. We are assembling a diverse and talented team of technologists and problem solvers who are passionate about making a real difference. If you're looking to shape meaningful solutions and be part of something bigger — Codex Solutions is where you’ll want to be.

Together, We Can Make A Significant Impact 

We are looking for a Senior Software Engineer with 3–6 years of fullstack development experience to contribute to the design and delivery of secure, scalable digital systems for the public sector. The ideal candidate is skilled in API development, cloud platforms, and secure coding practices, with hands-on exposure to DevSecOps workflows.

Be Part of Our Success

• Design and develop high-quality fullstack applications that meet functional and security requirements.
• Build and maintain well-documented, secure RESTful APIs for system integration.
• Write clean, secure, and maintainable code aligned with best practices.
• Collaborate with software leads, UI/UX designers, and DevOps engineers to deliver system features and enhancements.
• Participate in implementing CI/CD pipelines and automated testing within a DevSecOps framework.
• Develop systems that integrate with government authentication mechanisms (e.g., Singpass, Corppass) and adhere to public sector compliance standards.
• Contribute to code reviews, system documentation, and agile sprint activities.

Qualities We Value

• 3–6 years of hands-on experience in fullstack software development.
• Proficient in developing and integrating RESTful APIs.
• Strong understanding of secure coding principles and DevSecOps practices.
• Familiar with cloud environments such as AWS or Azure.
• Experience in government or enterprise systems, especially those integrating with national authentication services.
• Familiar with agile methodologies and collaboration tools.

Our Commitment That Goes Beyond the Norm

• An environment where you will be working on cutting-edge technologies and architectures.
• Safe space where diverse perspectives are valued, and everyone’s unique contributions are celebrated.
• Meaningful work and projects that make a difference in people’s lives.
• A fun, passionate and collaborative workplace.
• Competitive remuneration and comprehensive benefits.