Job Description

Senior / Staff Analog Design Engineer - High Speed SerDes

4 days ago Be among the first 25 applicants

We are seeking an experienced Analog /RF IC designer to architect, implement and productise the multilane, multistandard SerDes (serialiser / deserialiser) interfaces that move data in and out of the OTPU at tens of gigabits per second per lane. You will own both transmit and receive pathsequalisers, CDRs, drivers, samplers and clocking assist blockswhile ensuring robust operation over challenging channels and across multiple aggregated lanes. Your designs will be central to realising Fluxs multiterabitpersecond optical fabric.

• Define, design and verify SerDes cores operating at >25Gb/sperlane, including TX FIR/DFE equalisation, CTLE/FFE receivers, decisionfeedback paths, and highlinearity output drivers.
• Develop adaptive clockdatarecovery (CDR) loops and multilane deskew / phasealignment schemes that achieve < 200 fs rms additive jitter and < 5 ps lanetolane skew.
• Model channel losses (PCB, package, fibre) and work with signalintegrity engineers to cooptimise link budgets, impedance control and returnloss targets.
• Partner tightly with analog designers photonic, packaging, and digital microarchitecture teams to integrate SerDes IP into large chiplets and optical transceiver modules.
• Mentor junior engineers, conduct rigorous design reviews, and establish bestpractice flows for highspeed mixedsignal design, verification and lab characterisation.

• 7 + years of industry experience designing production highspeed SerDes, multiGHz CDRs, or comparable mixedsignal I/O macros in advanced CMOS nodes.
• Demonstrated success taping out > 56 Gb/s links meeting BER < 1012, stringent jitter masks and channel compliance specs.
• Deep understanding of linklevel signalintegrity, phase noise, adaptive equalisation, clock multiplication and onchip calibration techniques.
• Mastery of stateoftheart EDA flows: behavioral modeling (VerilogA/AMS, IBISAMI), transient / Sparameter simulation, EM extraction, and mixedsignal verification.
• Strong measurement skills: highspeed probing, BERT eyediagramming, deembedding, PRBS and compliance testing.
• Bachelors degree in Electrical Engineering or related field (Masters / PhD preferred).
• Excellent crossdisciplinary communication, problemsolving aptitude, and a proven ability to deliver in fastmoving, innovationdriven environments.
• A portfolio of patents, publications or opensource contributions that highlights creative SerDes or highspeed analog design insight.

• $194,000 $270,000, depending on experience, skills, and location.
• Competitive stock options, youre not just part of the journey, you will own a piece of it.
• Live within 45 minutes of the office? Perfect. Live within 20 minutes? Well add an extra location bonus to your salary.
• We offer financial and operational relocation support (US and abroad), through a dedicated thirdparty provider who is on hand to make your move as seamless as possible.
• We offer visa sponsorship so if we make you an offer we will make every reasonable effort to secure you a visa, but we may not be able to sponsor visas for every role and candidate.
• Were in the process of setting up a US group policy once we have 5+ employees. In the meantime, were providing a health insurance stipend of $800/month to offset costs. Once the group policy is live, Flux will cover 100% of the employee premium, and offer options like dental, vision and life insurance with an aim to remain competitive among Austin tech and start up employers.
• We offer US employees access to a 401(k) retirement savings plan and we plan to introduce an employer match in line with tech market norms (commonly in the 4-5% range). Our goal is to keep our retirement benefits competitive while we scale.
• Top of the line, high-spec tech for everyone.
• Sony noisecancelling 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.
• Periodic travel to London HQ and regular team socials.
• 33 days of paid time off (PTO), including US federal holidays.

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.

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.

Seniority level: MidSenior level

Employment type: Fulltime

Job function: Engineering and Information Technology

Industries: Semiconductor Manufacturing

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San Francisco, CA $194,000.00-$270,000.00 4 days ago

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