Title:  Senior Cybersecurity Software Engineer (Cross Domain Solutions) (DSC/SN)

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, we deliver 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.

Responsibilities

• Secure System Development: Design and implement Cross Domain Solutions components that enforce strict data flow control and security policies across classified/unclassified domains.
• Protocol Handling: Develop and optimize secure communication features across OSI Layers 2–7, including packet filtering, protocol validation, and content inspection.
• Performance & Security Optimization: Achieve low-latency, high-throughput data transfer while maintaining compliance with security frameworks (e.g., Common Criteria, NIST).
• Containerization & Orchestration: Deploy Cross Domain Solutions & Services using Docker and orchestrate with Kubernetes or Docker Swarm, ensuring hardened configurations and RBAC.
• Secure Messaging: Architect and maintain messaging systems using RabbitMQ, Kafka, or Redis, with emphasis on integrity, confidentiality, and controlled release.
• Compliance & Assurance: Implement secure coding practices, encryption (TLS/mTLS), and auditing mechanisms aligned with cybersecurity standards.
• Collaboration: Work closely with security architects, compliance teams, and government stakeholders to meet accreditation requirements.

Technical Expertise

• Networking & Security:
• OSI Layers 2–7, secure protocol handling (TLS/mTLS, IPsec), packet filtering, DPI.
• Network segmentation, VLANs, firewall rules, and zero-trust principles.
• Secure Messaging:
• Encryption, authentication, and integrity checks on messaging systems.
• Message filtering and sanitization for cross-domain compliance.
• Container Security:
• Hardened Docker/Kubernetes deployments, RBAC, Pod Security Policies, image scanning.
• Performance & Reliability:
• Low-latency design, fault-tolerant architectures, and secure failover strategies.
• Compliance & Auditing:
• Logging, monitoring, and evidence collection for security accreditation.

Qualifications

Experience:

• 5–8+ years in software engineering, preferably with 2–3+ years in secure networked systems or Cross Domain Solutions environments.

Programming:

• Proficiency in one or more of: Java (Spring/Spring Boot), Go, C#/.NET, Node.js (TypeScript/JavaScript), or Python for application components.
• Proficiency in C/C++, Go, or Rust for performance-critical components will be a plus

Cybersecurity Knowledge

• Containers & Cloud: Experience with Kubernetes, Docker, and secure container lifecycle management.
• Messaging Systems: Hands-on with messaging systems such as, but not limited to, RabbitMQ, Kafka, or Redis in secure, high-availability deployments.
• Mindset: Strong security-first approach, attention to detail, and ability to work in regulated environments.

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.