BIOS​/Platform System Engineer

Position: Staff BIOS/Platform System Engineer
## Staff BIOS/Platform System Engineer Apply locations:
San Jose, CAtime type:
Full time posted on:
Posted Yesterday job requisition :
R-1487

Monolithic Power Systems, Inc. (MPS) is one of the fastest growing companies in the Semiconductor industry. We are worldwide technical leaders in Integrated Power Semiconductors and Systems Power delivery architectures. At MPS, we cultivate creativity, are passionate about sustainability, and are committed to providing leading-edge products and innovation to our customers. Our portfolio of technology helps power our world ---come join our team and see how YOU can make a difference.
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* Job Description:

** We are seeking a skilled and motivated Senior BIOS Engineer to join our system engineering team. In this role, you will work closely with Systems Engineers to troubleshoot, validate, and optimize firmware and low-level software across a diverse portfolio of platforms built on AMD, Intel, and ARM-based CPUs, with a focus on DDR memory subsystems and other critical components. You will play a key role in bringing up/troubleshooting and validating memory subsystem/components on different platforms, resolving complex hardware-software interface issues, and ensuring robust interoperability/compatibility of subsystems/components and production readiness.##

Key Responsibilities
* Analyze, troubleshoot, and customize BIOS/UEFI firmware for platforms using AMD EPYC/Ryzen, Intel Core/Xeon, and ARM-based processors.
* Collaborate closely with Systems Engineers to troubleshoot and validate subsystems and components across the full platform stack.
* Lead BIOS-level bring-up and validation for new hardware platforms, including debug of CPU, chipset, and memory (DDR5) subsystems.
* Analyze and resolve hardware-firmware interface issues including POST failures, memory training errors, PCIe enumeration problems, and thermal/power sequencing anomalies.
* Configure and validate DDR5 memory subsystems, including SPD/XMP programming, memory training tuning, RAS features, and JEDEC compliance.
* Develop and execute validation test plans for BIOS features, power management (ACPI/S-states), security features (Secure Boot, TPM, AMD PSP, Intel TXT/SGX), and boot flows.
* Work with CPU vendors to ensure the adoption of certain BIOS customization for certain platforms
* Debug using industry-standard tools such as JTAG/ITP debuggers, logic analyzers, oscilloscopes, and serial console output.
* Author and maintain issue logs/notes, validation reports, debug guides, and internal technical documentation.
* Participate in design reviews, hardware bring-up planning, and cross-functional meetings
* Support manufacturing and sustaining engineering with BIOS customization, factory programming, and field issue resolution.##

Required Qualifications
* Bachelor’s degree in Electrical Engineering, Computer Engineering, Computer Science, or a closely related field.
* 3+ years of hands-on experience in BIOS/UEFI firmware development or validation.
* Demonstrated experience with at least two of the following CPU architectures: AMD (AGESA, EPYC/Ryzen), Intel (FSP, Core/Xeon), or ARM (TF-A, EDK2).
* Strong understanding of DDR5 memory architecture, training algorithms, SPD/MR registers, and RAS features.
* Proficiency in C/C++ and scripting languages (Python, Bash) for firmware development and automation.
* Experience with UEFI/EDK2 framework, SMM, DXE, PEI driver development, and ACPI/ASL.
* Familiarity with hardware debug tools: JTAG debuggers (Intel ITP, Lauterbach), protocol analyzers, oscilloscopes, and serial console interfaces.
* Solid understanding of platform busses and interfaces: PCIe, USB, I2C/SMBus, SPI, LPC, UART, and GPIO.
* Experience reading and interpreting hardware schematics, datasheets, and silicon vendor documentation.
* Excellent analytical and problem-solving skills with the ability to work across hardware and software boundaries.
* Strong written and verbal communication skills; experience authoring technical documentation.##

Preferred Qualifications
* Experience with AMD PSP, Intel ME/CSME, or ARM Trust Zone security subsystems.
* Familiarity with BMC firmware (OpenBMC) and IPMI/Redfish management…