Embedded Software Engineer (AI Hardware)

Location: London - JJ Mack or Bristol - The Crescent, United Kingdom

Company

hirify.global is developing custom chips and systems to accelerate frontier AI inference, targeting thousands of tokens per second and efficient operation of long-context models.

What you will do

• Write and optimise performance-critical ML kernels in C, using assembly where needed for RISC-V and hirify.global's own ISA.
• Build low-level control paths for scheduling, synchronisation, and data movement.
• Develop validation workloads and microbenchmarks to align simulation with hardware behaviour and measure performance.
• Profile, benchmark, and track regressions to ensure performance improvements are repeatable.
• Evaluate early accelerator compute runs and silicon performance, feeding results into the hardware and software roadmap.
• Collaborate with simulation, hardware, ML, compiler, firmware, and runtime engineers to turn profiling data into architecture and performance improvements.

Requirements

• Proven deeply embedded software experience.
• Strong performance instincts, including the ability to reason about low-level architecture, memory behaviour, and cycle usage.
• Excellent C skills and a pragmatic approach to maintainable low-level code.
• Comfort writing and debugging optimised assembly; RISC-V is ideal.
• Collaborative, clear communicator with high ownership and the ability to work through difficult technical problems.
• Degree in Computer Science, Electronic Engineering, Maths, Physics, or a related field, plus 3+ years of industry experience.

Nice to have

• Experience with GPUs or dedicated ML accelerators.
• Rust and/or Python experience.
• Experience with functional or performance simulators and validation or benchmarking workloads.
• Familiarity with modern ML inference workloads.

Culture & Benefits

• Full-time role based in the London or Bristol office.
• Competitive salary reflecting experience and the specialist nature of the role.
• Meaningful equity and ownership participation.
• Private medical, dental and vision cover, contributory pension, 25 days of holiday plus bank holidays, and life/critical illness insurance.
• Inclusive, diverse office environment with a commitment to Equal Employment Opportunity.

Hiring process

• Some roles may require additional eligibility checks because the work is subject to UK, US, and other international export control regulations.