SelectLevelID: CSBE-1DescriptionRole OverviewSemidynamics is seeking an experienced Senior SERDES/C2C First-Silicon Bring-Up Engineer to support the transition from verification collateral to a deterministic, executable and diagnosable physical SERDES/C2C bring-up flow. The engineer must be able to isolate failures across the physical PHY/modem, clocking and calibration layers and the digital C2C/controller layer.Why Semidynamics?Work for one of Europe’s most promising deep-tech semiconductor scale-ups.Accelerated development path.4 days per week in the Barcelona office (city center), 1 day WFH.1 week of work from everywhere in the world.Competitive package.A collaborative, technical, and growth-oriented environment that values direct ownership and clear thinking.RequirementsRequired experienceDemonstrable hands-on first-silicon SERDES or high-speed PHY bring-up experience.Strong understanding of PLL, CDR, reference-clock selection, reset sequencing, calibration and lane readiness.Experience with TX/RX configuration, termination, equalization, polarity/lane configuration and link-training flows.Ability to debug a link that does not reach its expected operational state using status registers, counters and physical measurements.Low-level C/C++ firmware development,



MMIO/register programming and bounded polling/error handling.Ability to correlate RTL/UVM/cosimulation collateral with physical-silicon behaviour without blindly copying simulation assumptions.Practical use of oscilloscopes and appropriate high-speed/debug laboratory equipment.Experience working across hardware, firmware and verification teams during first-silicon debug.Strongly preferredChip-to-chip, chiplet, die-to-die or similar C2C interface experience.Experience with Cadence SERDES/PHY IP or comparable commercial PHY IP.Experience with PHY firmware, embedded PHY microcontrollers, calibration firmware or mailbox/control interfaces.Experience building deterministic bring-up gates and reusable evidence rather than one-off laboratory procedures.Expected responsibilitiesReview and reconcile existing verification/simulation sequences with the physical bring-up contract.Help establish reference-clock, reset, physical-modem, calibration, controller and link-training ordering.Implement or review low-level C/C++ register sequences and status polling.Define bounded timeout, readback and failure-classification behaviour.Execute and debug physical link bring-up together with the internal technical owner.Use link status, retry/error counters and a real data transaction to distinguish PHY readiness from functional-link readiness.Produce repeatable logs, register snapshots and failure evidence suitable for regression and management traceability.#J-18808-Ljbffr

📌 Senior Serdes/c First-Silicon Bring-Up Engineer (Madrid)
🏢 Semidynamics
📍 Madrid