ID: CSBE-1

Description

Role Overview
Seynamics 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 Seynamics?

- 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 gates and reusable evidence rather than one-off laboratory procedures.

Expected responsibilities

- Review 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.

SENIOR

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