Assistant Principal Software Engineer (C++|C#)(DSC|SN)

Singapore Technologies Engineering Ltd; Singapore; On-site; SGD 125,000 - 150,000; Full time

Job summary

A global technology and defence company in Singapore is seeking an Assistant Principal Software Engineer. The successful candidate will bridge technical leadership and hands-on development, defining software architecture and leading complex projects. A minimum of 8 years' experience in C++ and C#, with technical leadership background, is required. The role offers a unique opportunity to mentor other engineers and contribute to mission-critical applications, enhancing the company's cyber resilience.

Qualifications

• 8–10 years of professional experience in C++ and C# development, with at least 3 years in a technical leadership role.
• Proven experience in designing and delivering secure Windows-based applications.
• Strong understanding of cryptographic algorithms (AES, RSA, ECC).
• Excellent problem-solving skills and ability to guide teams through complex challenges.

Responsibilities

• Support the Principal Engineer in defining software architecture.
• Lead development of complex modules and ensure adherence to coding practices.
• Collaborate with teams to translate business requirements into technical solutions.
• Mentor senior and mid-level engineers in their technical growth.

Skills

C++ development

C# development

Leadership

Secure coding practices

Problem-solving

Communication

Collaboration

Tools

Visual Studio

Git

Job description

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. The Group uses technology and innovation to solve real-world problems and improve lives through its 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.

Join our Cyber Team

We are an industry leader in cybersecurity with over two decades of experience, delivering a holistic suite of trusted cybersecurity solutions to empower cyber resilience for government and ministries, critical infrastructure, and commercial enterprises. Backed by our indigenous capabilities and deep domain expertise, we offer robust cyber‑secure products and services in cryptography, cybersecurity engineering, digital authentication, SCADA protection, audit and compliance. We specialise in the design and build of security operations centres for cybersecurity professionals and provide managed security services to strengthen the cybersecurity posture of our government and enterprise customers.

Job Overview

As an Assistant Principal Software Engineer, you will play a key role in bridging technical leadership and hands‑on development. You will assist in defining architecture, lead complex projects, and mentor senior engineers while ensuring secure, scalable, and high‑performance solutions. This position requires strong technical depth, leadership capability, and collaboration across teams to deliver enterprise‑grade applications and Outlook plugins with advanced cryptographic features.

Key Responsibilities

• Support the Principal Engineer in defining and implementing software architecture for mission‑critical applications.
• Lead development of complex modules and ensure adherence to secure coding practices and performance standards.
• Collaborate with cross‑functional teams to translate business requirements into technical solutions. Conduct code reviews, architecture assessments, and enforce best practices in design and implementation.
• Mentor senior and mid‑level engineers, fostering technical growth and knowledge sharing.
• Assist in evaluating emerging technologies and contribute to product roadmap decisions.
• Ensure robust version control, CI/CD pipelines, and maintain high‑quality documentation.
• Participate in customer and stakeholder discussions, providing technical insights and recommendations.

Required Qualifications

• 8–10 years of professional experience in C++ and C# development, with at least 3 years in a technical leadership role.
• Proven experience in designing and delivering secure Windows‑based applications and Outlook plugins.
• Strong understanding of cryptographic algorithms (AES, RSA, ECC) and secure software design principles.
• Proficiency with development tools (Visual Studio, Git), CI/CD systems, and debugging techniques.
• Excellent problem‑solving skills and ability to guide teams through complex technical challenges.
• Strong communication and collaboration skills.

Preferred Qualifications

• Experience with enterprise security frameworks and compliance standards.
• Familiarity with Agile/Scrum methodologies and DevSecOps practices.
• Exposure to architectural decision‑making and risk analysis.

Work location

Jurong East

Find out more: https://www.stengg.com/cybersecurity

ST Engineering believes in fostering a culture where team members are encouraged to overcome challenges, explore new ideas, and work together to succeed. We value individuals who are determined to push beyond the boundaries, and have a thirst for knowledge, continuous learning, and self‑improvement.