Flash Layer Firmware Engineer (m/f/d)
Swissbit AG7 months ago
Remote, GermanySenior
Responsibilities
- Implement and maintain NAND flash interface firmware for ONFI 4.x/5.x and JEDEC Toggle mode, including timing calibration and multi-die/multi-plane operation.
- Lead the introduction of new flash vendors and generations from preliminary datasheet analysis through production qualification, including FPGA-based prototyping.
- Characterize flash-device behavior across threshold-voltage distributions, read/program/erase disturbances, retention, cell-to-cell interference, program/erase cycles, and temperature ranges.
- Develop and optimize flash-layer calibration and read-retry strategies and provide raw BER and soft-information data to the ECC subsystem.
- Document vendor-specific device behavior and errata for the broader engineering team.
- Debug flash-level issues using logic analyzers and protocol capture and support JESD47/218 reliability qualification and DVT/PVT validation.
Requirements
- Bachelor’s or master’s degree in computer science, engineering, or a related field, or an equivalent qualification.
- Strong experience developing embedded C firmware at the hardware-interface level.
- Strong knowledge of NAND flash architecture and cell physics, including floating-gate and charge-trap technologies.
- Experience with ONFI or Toggle-mode protocols at the register and timing level.
- Hands-on experience commissioning or characterizing at least one real flash technology generation, such as SLC, pSLC, MLC, TLC, or QLC.
- Understanding of NAND reliability mechanisms, including disturbances, retention, threshold-voltage shifts, and cell-to-cell interference.
- Python scripting experience for test automation and characterization-data analysis.
- Experience with Micron, Samsung, Kioxia, SK Hynix, or WDC flash devices is an advantage.
- Good English communication skills; German is advantageous.
- Collaborative working style and openness to teamwork.
Benefits
- Flexible working hours and room for personal planning.
- Opportunities for professional development.
- Well-equipped engineering infrastructure with state-of-the-art EDA tools.
- Corporate benefits including Hansefit, Jobrad, and Pluxee.
- The role is primarily associated with the new Dresden location, with proximity to the development and production site in Berlin.
About Swissbit AG
Swissbit AG designs and manufactures embedded memory and hardware-based security products—industrial SSDs, SD/microSD cards, USB modules, and IoT security elements—for OEMs in industrial, automotive, networking, and IoT markets. It sells rugged storage and data‑protection modules plus software and services to secure devices and infrastructure. Founded in 2001 and headquartered in Bronschhofen, Switzerland, Swissbit is privately held and backed by Ardian.