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ID: PFSB-2

Description

Role Overview Semidynamics is seeking a Senior LPDDR5X Controller/PHY First-Silicon Bring-Up Engineer to support reconstruction, implementation and physical qualification of the LPDDR5X Controller/PHY initialization and training flow, taking controlled verification collateral through to deterministic first-silicon execution and failure diagnosis.

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 DDR/LPDDR post-silicon bring-up experience; LPDDR5/LPDDR5X experience is strongly preferred.
- Strong understanding of memory-controller and PHY initialization, DRAM mode registers, timing configuration and frequency operating points.




- Hands-on experience with PHY initialization firmware, mailbox/status flows, calibration and training procedures.
- Experience diagnosing training failures and separating controller, PHY, DRAM, clock, reset and board-level causes.
- Low-level C/C++ firmware development and direct MMIO/register access.
- Ability to translate ordered verification sequences into deterministic executable firmware with readback, polling and bounded timeout handling.
- Understanding of memory read/write sanity testing and the transition from training PASS to a usable memory configuration.
- Practical laboratory experience during physical first-silicon memory bring-up.

Strongly preferred
- Direct experience with Cadence DDR/LPDDR Controller and PHY IP.
- Experience with Cadence PHY firmware/training flows or comparable commercial DDR PHY solutions.
- LPDDR5X frequency switching, training checkpoints and known-good configuration capture.
- Experience with firs

📌 Senior LPX Controller/PHY First-Silicon Bring-Up Engineer (Barcelona)
🏢 Semidynamics
📍 Barcelona