SelectLevel

ID: CSBE-1
Description

Role Overview
Semidynamics 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.
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 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

📌 Senior SERDES/C First-Silicon Bring-Up Engineer (Madrid)
🏢 Semidynamics
📍 Madrid