Semidynamcis 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.

Las cualificaciones, habilidades y toda la experiencia relevante necesaria para este puesto se pueden encontrar en la descripción completa a continuación.

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 first CPU-visible bandwidth measurements and controlled memory-performance evidence.
- Experience correlating verification traces, register databases and physical-silicon results.

Expected responsibilities
- Review existing DDR verification collateral and identify the authoritative initial

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