Senior Embedded Software Engineer

Flux Computing designs and manufactures optical processors to train and run inference on large AI models. Join us to be part of a highly motivated and skilled team that thrives on delivering impact and innovation at speed.

The Role

We're searching for Senior Embedded Engineers to design and build ultra-high performance tooling that supports our OTPU hardware development. You will own tools that span hardware safety, calibration, debugging, and validation. Your mission is to go from concept to deployment - rapidly iterating, prototyping, and delivering robust embedded solutions that enable our OTPUs to run safely, efficiently, and continuously push the limits of their performance envelope.

Responsibilities

• Project Ownership: Own and deliver projects on your team's roadmap that unlock key high-impact technical and business milestones that drive the success of Flux.

• Collaboration: Partner closely with optical, hardware, and software teams to align on system interfaces, requirements, and performance goals.

• Validation & Bring-up: Create robust tooling for hardware validation and bring-up, with rapid prototyping in Python and a clear path to production-grade implementations.

• Embedded Systems: Design and implement embedded systems for hardware safety, synchronization, and low-level control.

• Calibration & Debug Tooling: Develop calibration and debug utilities - starting with fast Python prototypes and iterating toward robust releases.

• CI/CD for Embedded: Create CI/CD pipelines tailored to embedded firmware, enabling quick iterations and reliable system integrity with hardware-in-the-loop and software-in-the-loop testing.

• Real-Time Monitoring & Fault Handling: Build systems for live hardware diagnostics, monitoring, and automated fault recovery across OTPU platforms.

Skills & Experience

• 5+ years experience with bring-up, calibration, and debug of custom hardware systems (e.g. SoCs, FPGAs, or AI accelerators)

• Deep proficiency in C/C++ for embedded applications, with a solid grasp of real-time constraints, memory models, and low-level hardware interfaces

• Strong Python skills for prototyping, automation, and test harness development

• Demonstrated experience building CI/CD pipelines for embedded development (e.g. automated flashing, test orchestration, artifact tracking)

• Proficiency with hardware debugging tools (oscilloscopes, logic analyzers, JTAG, etc.) and interpreting electrical signals in context.

• Solid understanding of hardware/software boundaries, including interrupt handling, bus protocols (e.g.PCIe), and memory-mapped I/O.

• Excellent written & verbal communication; thrive in fast-paced, cross-disciplinary start-up settings.

Compensation & Benefits

• £140,000 – £187,000 annual salary, depending on experience, skills, and location.

• Competitive stock options, you're not just part of the journey, you will own a piece of it.

• Work from our HQ in King's Cross, right in the middle of London's buzzing AI scene.

• Live within 45 minutes of the office? Perfect. Live within 20 minutes? We'll add an extra location bonus to your salary.

• We offer visa sponsorship and full relocation support (UK and abroad), through a dedicated third-party provider who are on hand to make your move to London as seamless as possible.

• Full BUPA healthcare and dental cover, medical history disregarded.

• High-spec tech for everyone - M4 Macs as standard, M4 Pros for Engineers.

• Sony noise-cancelling headphones and ergonomic setups to keep you comfortable and focused.

• Personal company card to spend on tools that help you do your job - like ChatGPT Pro or anything else that boosts your workflow.

• Healthy, chef-cooked dinners in the office every night, with something for every diet and tastebud.

• Monthly off-site team socials.

• 25 days of paid holiday, plus all the UK bank holidays.

• Access to our in-house 3D printer for personal or work projects.

• Cycle2work scheme.

• Need a caffeine fix? We've got you covered with a tab at our favourite local coffee shop.

• We offer a pension plan and salary sacrifice options.

Due to U.S. export control regulations, candidates' eligibility to work at Flux depends on their most recent citizenship or permanent residency status. We are generally unable to consider applicants whose most recent citizenship or permanent residence is in certain restricted countries (currently including Iran, North Korea, Syria, Cuba, Russia, Belarus, China, Hong Kong, Macau, and Venezuela). Applicants who have subsequently obtained citizenship or permanent residency in another country not subject to these restrictions may still be eligible.

Please note: we receive many applications, and this role is not at the top of our priority list. We anticipate reviewing all submissions within 3 weeks, and will contact you if you are shortlisted.

We do not accept unsolicited CVs from recruitment agencies, will not be liable for any fees, and prohibit unauthorised use of our company name in recruitment activities.

We're building fast and that includes our benefits. More exciting additions are coming soon for the Flux crew.

If you are passionate about pushing the boundaries of what's possible in AI and thrive in a high-energy, fast-paced environment, we want to hear from you. Apply now to join Flux and be a key player in shaping the future of computing.