Flux Computing · 5 months ago
Senior / Staff /Analog Design Engineer - High Speed SerDes
Austin 
Full-time
Onsite
Senior Level, Lead/Staff
7+ years expFlux Computing designs and manufactures optical processors to train and run inference on large AI models. The role involves architecting, implementing, and productizing multi-lane, multi-standard SerDes interfaces for high-speed data movement, while mentoring junior engineers and collaborating across teams.
Artificial Intelligence (AI)HardwareMachine LearningManufacturingOptical Communication
Responsibilities
Define, design and verify SerDes cores operating at >25Gb/s‑per‑lane, including TX FIR/DFE equalisation, CTLE/FFE receivers, decision‑feedback paths, and high‑linearity output drivers
Develop adaptive clock‑data‑recovery (CDR) loops and multi‑lane deskew / phase‑alignment schemes that achieve < 200 fs rms additive jitter and < 5 ps lane‑to‑lane skew
Model channel losses (PCB, package, fibre) and work with signal‑integrity engineers to co‑optimise link budgets, impedance control and return‑loss targets
Partner tightly with analog designers photonic, packaging, and digital micro‑architecture teams to integrate SerDes IP into large chiplets and optical transceiver modules
Mentor junior engineers, conduct rigorous design reviews, and establish best‑practice flows for high‑speed mixed‑signal design, verification and lab characterisation
Qualification
Required
7 + years of industry experience designing production high‑speed SerDes, multi‑GHz CDRs, or comparable mixed‑signal I/O macros in advanced CMOS nodes
Demonstrated success taping out > 56 Gb/s links meeting BER < 10‑12, stringent jitter masks and channel compliance specs
Deep understanding of link‑level signal‑integrity, phase noise, adaptive equalisation, clock multiplication and on‑chip calibration techniques
Mastery of state‑of‑the‑art EDA flows: behavioral modeling (Verilog‑A/AMS, IBIS‑AMI), transient / S‑parameter simulation, EM extraction, and mixed‑signal verification
Strong measurement skills: high‑speed probing, BERT eye‑diagramming, de‑embedding, PRBS and compliance testing
Bachelor's degree in Electrical Engineering or related field
Excellent cross‑disciplinary communication, problem‑solving aptitude, and a proven ability to deliver in fast‑moving, innovation‑driven environments
Preferred
Master's / PhD preferred
A portfolio of patents, publications or open‑source contributions that highlights creative SerDes or high‑speed analog design insight
Company
Flux Computing
Flux Computing designs optical AI accelerators that use light-based processors for training and inference on large models.
51-200 employees
Funding
Current Stage
Growth StageCompany data provided by crunchbase