Flux Computing designs and manufactures optical processors to train and run inference on large AI models. Join us in London 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 a ASIC Lead (Analog) to direct the conception‑to‑production development of Flux’s analog ASICs with multiple high‑speed analog subsystems—20 GSPS data converters, TIAs, ultra‑low‑jitter PLLs, and 100‑lane SerDes fabrics—all with end‑to‑end signal paths that settle in < 1 ns.
This is a hands‑on leadership position: you will manage and mentor a multidisciplinary team, own program execution to tape‑out, and serve as the principal technical authority for every analog block that underpins our OTPU.
Responsibilities
Architect and drive full ASIC analog strategy—converter front ends, clocking, optical IO, power regulation and on‑chip non‑linear compute engines—ensuring bandwidth, latency, noise and power budgets are simultaneously met.
Lead and line‑manage 6 - 12 analog IC and physical‑layout engineers: goal‑setting, performance reviews, recruiting, and skills development and maintain a culture of rapid, first‑time‑right design.
Collaborate with digital leads to guarantee end-to-end timing determinism and low-latency control loops.
Implement agile, milestone‑driven schedules that hit aggressive tape‑out dates; track risk burn‑down and drive cross‑function resolution with digital, photonics, packaging and firmware groups.
Champion rigorous design‑review and verification processes (block and top‑level), including behavioural modelling, corner / Monte‑Carlo sign‑off, and lab‑to‑simulation correlation.
Represent analog interests in executive and customer/partner communications; create concise technical roadmaps, risk assessments and silicon performance updates.
Skills & Experience
12 + years in analog or mixed‑signal IC design with at least 3 complete tape‑out cycles as Senior IC / Lead on products operating > 10 GHz and achieving < 1 ns end‑to‑end settling time.
Demonstrated success leading teams that delivered multi‑block analog front ends—ADCs/DACs, TIAs, SerDes, PLL/CDR—into high‑volume production on advanced CMOS nodes.
Deep expertise in low‑latency sampling circuits, broadband feedback networks, ultra‑low‑jitter clocking, package / PCB co‑design, and parasitic‑aware layout sign‑off.
Solid understanding of mixed‑signal interaction collaborating with the digital lead and agreeing specification splits.
Strong preference for AI‑compute silicon experience—analog accelerators for activation functions, non‑linear transforms, layer‑norm or in‑memory compute—with quantified power‑latency achievements.
Mastery of the standard tool chain: Cadence Virtuoso & SpectreRF, EM extraction (EMX/HFSS), mixed‑signal verification (AMS Designer, Questa ADMS), and production test correlation.
Prior people‑management responsibility: hiring, mentoring, salary planning and performance management for engineers.
Excellent project‑leadership skills: schedule ownership, risk analysis, vendor/foundry engagement, first‑pass success mindset.
Outstanding written and verbal communication; comfortable presenting detailed technical and program status to executives, customers and cross‑site teams.
Compensation & Benefits
Competitive salary and 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 £24,000 a year 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.
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.