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 (Digital) who can drive a complex, high‑speed mixed‑signal chip from concept to mass production while line‑managing and mentoring a world‑class team of design engineers.
You will own delivery of the digital subsystems that stitch together > 100 high‑bandwidth lanes, interface to fast‑settling DACs and ADCs, and run deterministic control loops at > 100 MHz clock rates.
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 digital block that underpins our OTPU.
Responsibilities
Architect, plan and deliver the digital top level of a multi‑lane optical compute ASIC—RTL, synthesis, DFT/DFD, static‑timing and physical implementation.
Lead cross‑functional teams (digital, analog, verification, layout, packaging, test, firmware) through all silicon lifecycle stages: architecture spec RTL physical design sign‑off
Lead and line‑manage 6‑12 digital & mixed‑signal engineers: goal‑setting, performance reviews, recruiting, and skills development and maintain a culture of rapid, first‑time‑right design.
Define and track project schedules, budgets and risk‑mitigation plans; present status, trade‑offs and escalation options to executives and customers.
Collaborate with analog leads on fast‑settling current‑steering DACs, high‑speed SerDes, PLLs and clock‑mesh networks to guarantee end‑to‑end timing determinism and low‑latency control loops.
Drive design verification strategy—UVM test‑benches, gate‑level sims, FPGA prototyping—and own silicon bring‑up test plans that hit first‑silicon functional goals.
Optimise multi‑lane protocols for bandwidth scaling, skew management and power efficiency; integrate error monitoring, calibration engines and field‑update hooks.
Encourage a culture of continuous improvement—methodology automation, design‑flow enhancements, documentation and knowledge sharing.
Skills & Experience
12 + years of digital ASIC development, with at least 3 full product cycles taken from specification through volume production.
Demonstrated success leading a digital team that delivered high speed ASICs containing high‑speed mixed‑signal interfaces (display drivers, image sensors, SerDes, RF SoCs, etc.).
Strong command of RTL design (SystemVerilog / Verilog), CDC/RDC, STA, place‑and‑route, power intent (UPF/CPF) and DFT/DFD methodologies.
Demonstrated success coordinating multi‑lane data paths, clock distribution and fast‑settling DAC / ADC control loops while closing timing and power at advanced nodes.
Solid understanding of mixed‑signal interaction: coupling, jitter, supply‑noise and on‑chip calibration; able to read analog schematics and agreeing specification splits.
Experience with high‑speed display or camera pipelines—timing controllers, MIPI / DSI / CSI, LVDS, DisplayPort, HDMI, or similar—strongly desired.
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.
