BIOS​/Platform System Engineer

Overview

Monolithic Power Systems, Inc. (MPS) is a leading company in the Semiconductor industry, specializing in Integrated Power Semiconductors and Systems Power delivery architectures. We cultivate creativity, sustainability, and innovation.

We are seeking a skilled and motivated Senior BIOS Engineer to join our system engineering team.

• 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 debugging CPU, chipset, and DDR5 memory 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 customizations.
• Debug using tools such as JTAG/ITP debuggers, logic analyzers, oscilloscopes, and serial console output.
• Author and maintain issue logs, 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.

• 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.
• 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 buses 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, ability to work across hardware and software boundaries.
• Strong written and verbal communication skills; experience authoring technical documentation.

• Experience with AMD PSP, Intel ME/CSME, or ARM Trust Zone security subsystems.
• Familiarity with BMC firmware (OpenBMC) and IPMI/Redfish management interfaces.
• Knowledge of server platform RAS features: DRAM ECC, memory mirroring, patrol scrub, and machine check architecture (MCA).
• Exposure to PCIe Gen 5 or CXL 2.0/3.0 interconnect validation.
• Hands-on experience with JEDEC DDR5 compliance testing and memory timing optimization.
• Understanding of power management frameworks: ACPI, AMD STAPM, Intel DPTF, and platform telemetry.
• Prior collaboration with silicon vendors (AMD, Intel, Arm Ltd.) on pre-silicon or early-silicon bring-up.
• Experience with version control systems (Git), CI/CD pipelines, and agile engineering workflows.

The role requires close day-to-day collaboration with Systems Engineers, Hardware Engineers, and Design/Applications Engineers in a fast-paced lab environment. You will have access to pre-production hardware, silicon support, and a dedicated debug lab. Occasional travel to vendor or customer sites may be required.

Competitive salary and equity compensation. Comprehensive health, dental, and vision benefits. 401(K) with company match, Employee Stock Purchase Program (ESPP), paid holidays and PTO. Flexible work arrangements and professional development support.

Monolithic Power Systems, Inc. is an Equal Opportunity Employer and embraces diversity in our employee population. We provide equal opportunity to all qualified applicants and employees regardless of race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, protected veteran status or other legally protected status.