fractile - Senior Systems Software Engineer

London - JJ Mack+ Equity2d ago

In Office Senior EMEA Materials Software Engineer Senior Software Engineer Linux Rust Close

Requirements

• Proven experience shipping production-critical, reliable embedded systems across two or more of: bare metal, RTOS, embedded Linux (or deep expertise in one with clear ability to ramp the others) • Strong C and/or Rust, and excellent engineering judgement around safety, testing, debugging, and failure modes • A reliability-first mindset: you design for observability, diagnosability, and recovery paths that are predictable and testable • Comfortable working close to the hardware/software boundary (bootloaders/BSP/kernel-adjacent work) and collaborating tightly with HW, driver, and runtime teams • Collaborative and high-ownership. You communicate clearly, move fast, and enjoy working through hard problems with others • Computer Science, Electronic Engineering, Maths, Physics, or related degree and 3+ years of industry experience • Embedded platform / systems firmware experience (board management, BMC-style stacks, rack controllers) • OpenBMC experience and/or embedded Linux image build/customisation experience • Security-minded, with practical instincts around secure boot, signed updates, device identity, and designing systems that fail safe and recover cleanly (direct experience in some areas is a plus) • Kernel device work (drivers, device tree, bring-up, perf/trace) • Hardware bring-up experience, including lab tools (logic analysers, oscilloscopes, waveform viewers) • RISC-V familiarity • Experience with GPUs or ML accelerators • If you want to build the control software that keeps rack-scale systems stable, safe, and secure for next-gen AI, come build it together.

Responsibilities

• Develop firmware and services for management controllers at every level: rack management, BMC, and board/device controllers (RTOS and bare metal) • Build systems software for board and rack management, from early bring-up through to production deployment • Implement the critical flows that keep fleets healthy: power-on and provisioning, monitoring/telemetry, updates, recovery, and security • Integrate with the wider host/device stack (drivers and runtime libraries) so the system works end-to-end • Work closely with hardware and device software teams to define reliable interfaces, validate behaviour, and debug boundary issues

Benefits

• Competitive salary: A competitive salary reflective of your experience and the specialist nature of the role. • Equity & Ownership: meaningful equity so everyone shares in the value creation • Benefits: Private Medical, Dental and Vision, Contributory Pension, 25 Days holiday plus bank holidays and Life/Critical Illness Insurance. • Diverse & fun office: we believe the hardest problems get solved by the broadest range of minds. We are committed to Equal Employment Opportunity through attracting and retaining a diverse team and building an inclusive environment. • Fractile is seeking to increase the clock speed of global progress, one chip at a time. We’ve recently raised $220M from investors including Founders Fund and Accel and our most important work lies ahead. Join us! • Export controls • Our work involves technologies subject to UK, US and other international export control regulations. Certain roles may require additional eligibility checks to ensure compliance with applicable law. We'll be transparent about this throughout the hiring process.