Senior Linux OS Engineer

Salary: £30,000 - 50,000 per year

Requirements

• Experience with BitBake / Yocto / OpenEmbedded
• Knowledge of Linux kernel hardening internals such as init on alloc, init on free, integrity measurement architecture, integrity policy enforcement, SELinux, or other mandatory access control mechanisms
• Strong understanding of Unix DAC (Discretionary Access Controls) and their impact on the security model upheld by dbus and other daemons
• Experience with dm-verity and secure boot implementations
• Strong ability to rapidly learn and adopt new functionality or code
• Understanding of SBOMs, their generation, and copyleft license compliance
• Familiarity with PKCS#11 and its application for secure production builds using offline HSM backed signing keys
• Security-driven mindset with capability to explain various security architectural concepts
• Understanding of exploit mitigations (CFI, SCS) and hardware features (BTI, PAC, MTE) in Arm platforms
• Real-world understanding of offensive exploitation and advising on architectural issues
• Good understanding of how hardware architectural decisions impact OS security (e.g., TEEs, ARM SMMUv3)

Responsibilities

• Develop and maintain OS using best practices in security
• Implement and analyze security policies and architectures to enhance OS integrity
• Advise on and improve existing architectural frameworks to strengthen security
• Collaborate with teams to integrate and test new functionality in OS builds
• Conduct research and implement measures against potential security vulnerabilities
• Provide support for the adoption of security features in both software and hardware
• Engage in continuous learning to stay updated on security technologies and standards

Technologies

• ARM
• Hardware
• HSM
• Support
• Linux
• Security
• Unix
• C++
• Firmware

More

We are a UK-based tech company offering a full-time, permanent position for an OS engineer. The role is primarily remote, with occasional travel to Central London and Harlow. We offer a competitive salary ranging from £30,000.00 to £50,000.00 per year, along with benefits such as flexitime and the option to work from home. Join our team to contribute to innovative technologies while improving the security architecture of our products.

last updated 17 week of 2026