Embedded Systems Security Engineer

RAPSYS TECHNOLOGIES PTE LTD; Foster City (CA); On-site; USD 140,000 - 180,000; Full time

Job summary

RAPSYS TECHNOLOGIES PTE LTD is seeking an Embedded Systems Security Engineer to harden an embedded Linux platform. You will bridge hardware security, kernel hardening, and secure user-space containment while automating security pipelines within CI/CD and coordinating with manufacturing for secure provisioning at scale.

You will design a Hardware Root of Trust, Secure Boot, and tamper-proof storage, build and maintain a TEE, and implement strict sandboxing and lifecycle security across devices.

Qualifications

• Bachelor's degree or equivalent practical experience in CS/engineering.
• 6+ years in Embedded Linux development, board bring-up, BSP customization.
• 3+ years deploying device security features in production hardware.
• Expertise with bootloaders and kernel storage/security subsystems.
• Deep understanding of ARM TrustZone architecture and security levels.
• Experience implementing SELinux/AppArmor policies and Linux containment tools.
• Proficiency in C and scripting in Python or Bash.

Responsibilities

• Design and implement Hardware Root of Trust and Secure Boot from first-stage bootloader through Linux kernel.
• Implement dm-verity and secure data encryption at rest for verified root filesystems.
• Develop, integrate, and maintain a TEE (OP-TEE) and Secure/TAs.
• Enforce containerization and sandboxing via SELinux, AppArmor, cgroups, namespaces, and seccomp.
• Build automated signing pipelines in CI/CD to sign bootloaders, kernels, and OTA payloads using HSMs/secure vaults.
• Collaborate with manufacturing to script eFuse/OTP programming and end-of-line security testing.
• Architect multi-slot boot recovery (A/B) for OTA-resilience.

Skills

Embedded Linux

Security engineering

Bootloaders / U-Boot

ARM TrustZone

SELinux / AppArmor

C programming

Python scripting

Education

Bachelor's degree in Computer Science / Engineering

Tools

U-Boot

Barebox

dm-verity

dm-crypt

Yocto Project

Buildroot

Git / CI/CD

OP-TEE

Job description

We are looking for an Embedded Systems Security Engineer to implement a security solution to harden our next-generation embedded Linux platform. In this role, you will bridge the gap between low-level hardware security, kernel hardening, and secure user-space application containment. You will not only design cryptographic defense mechanisms but will also automate security pipelines in CI/CD and partner directly with manufacturing teams to ensure devices are provisioned securely and reliably at scale without production risks

• Platform Hardening & Architecture: Design and implement the Hardware Root of Trust and Secure Boot architecture from the first-stage bootloader through the Linux kernel.
• Storage & Integrity Management: Implement dm-verity for cryptographically verified read-only root filesystems and secure data encryption at rest.
• Trusted Execution Environments: Develop, integrate, and maintain a TEE (e.g., OP-TEE) and author Secure/Trusted Applications (TAs).
• Application Sandboxing: Enforce strict user-space isolation and sandboxing strategies using SELinux, AppArmor, cgroups, namespaces, and seccomp filters to protect core systems from untrusted applications.
• DevSecOps Automation: Build automated cryptographic signing pipelines within CI/CD infrastructure (e.g., GitLab CI, GitHub Actions) to securely sign bootloaders, kernels, and OTA payloads using HSMs or secure key vaults.
• Production Provisioning Support: Collaborate with manufacturing teams to write robust scripts and tools for burning permanent hardware configuration fuses (eFuses / OTP memory) securely, designing end-of-line (EOL) test software to validate security features before shipping.
• System Resilience: Architect multi-slot boot recovery layouts (e.g., A/B partitioning) to guarantee fail-safe resilience against failed OTA updates or corrupted boots.

Qualifications

• Education: Bachelor's degree in Computer Science, Computer Engineering, Electrical Engineering, or a related technical discipline (or equivalent practical experience).
• Core Experience: 6+ years of professional experience in Embedded Linux development, board bring-up, and Board Support Package (BSP) customization.
• Security Focus: 3+ years of dedicated, hands‑on experience deploying device-level security features into physical production hardware.
• Low‑Level Systems: Expert knowledge of bootloader configurations (e.g., U-Boot Verified Boot, Barebox) and customizing the Linux kernel storage/security subsystem (dm-crypt,dm-verity).
• Hardware Security Architecture: Deep understanding of modern processor security architectures, specifically ARM TrustZone (ARMv7-A / ARMv8-A, Exception Levels EL1-EL3).
• Sandboxing & Access Controls: Proven track record implementing SELinux/AppArmor policies and utilizing standard Linux containment tools (cgroups, namespaces).
• Build Automation: Proficiency with embedded Linux build automated frameworks like the Yocto Project (BitBake recipe design) or Buildroot.
• Programming: Advanced proficiency in C and strong scripting skills in Python or Bash.

Preferred Qualifications

• Cryptography Expertise: Strong foundational knowledge of symmetric/asymmetric cryptography, hashing algorithms (SHA-256/384), public key infrastructure (PKI), and handling physical Hardware Security Modules (HSMs).
• Manufacturing Scale: Prior experience working with Contract Manufacturers (CMs) or internal factory lines to deploy secure key-injection and fuse-burning protocols.
• Advanced Sandboxing: Experience with embedded container runtimes (e.g., LXC, crun) or lightweight sandboxing frameworks tailored for resource-constrained architectures.
• Anti‑Rollback Protection: Experience designing secure versioning and hardware-enforced anti-rollback strategies for OTA updates