Select Level ID: CSBE-1 Description Role Overview Semidynamics is seeking an experienced Senior SERDES/C2 C First-Silicon Bring-Up Engineer to support the transition from verification collateral to a deterministic, executable and diagnosable physical SERDES/C2 C bring-up flow. The engineer must be able to isolate failures across the physical PHY/modem, clocking and calibration layers and the digital C2 C/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.
Requirements
Required experience Demonstrable 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 preferred Chip-to-chip, chiplet, die-to-die or similar C2 C 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

📌 Senior serdes/c2c first-silicon bring-up engineer (Barcelona)
🏢 Semidynamics
📍 Barcelona