AI / ML & DataOn-site

Member of Technical Staff - Security Engineering

Fractile · Bristol and London

Fractile, founded in 2022, designs chips and systems that run large AI models at thousands of tokens per second. This security engineer builds the chain of trust for its devices and racks, from secure boot and key hierarchies to signed updates and attestation, often before the hardware exists.

Apply on Fractile

Company: Fractile
Where: Bristol and London
Function: AI / ML & Data
Posted: 1 week ago
Work mode: On-site
Categories: AI & ML DeepTech SaaS

The role

What you’ll do

Threat-model the device, board, chassis and rack controllers and set a secure-by-design approach
Design and build secure boot, roots of trust, key hierarchies, device identity and attestation
Secure links between controllers and the host, and make firmware updates safe end to end
Harden the host Linux kernel and on-die firmware, and triage vulnerabilities to closure

What you’ll need

Hands-on work with secure boot, roots of trust, cryptography and key management
Experience building, not just using, a secure-boot chain, key hierarchy or attestation flow
Strong C and Rust with a focus on memory safety
Experience designing secure protocols between components; DICE, SPDM or TPM knowledge a plus

Good to know: London. Equity for all staff, 25 days' holiday plus bank holidays, private medical, dental and vision cover. Export-control rules may mean extra eligibility checks.