Systems Integration & Validation Engineer

About the Role Own end-to-end validation of our AI rack-scale systems. You'll take systems from board and tray bring-up to full racks and multi-rack clusters, through L11 rack integration and deployment in the field. That includes accelerator compute trays, host servers, scale-up switches, and the components that tie them together: NICs, retimers, cables, power shelves, busbars, liquid cooling, and rack management. You'll build the plans, environments, and automation that prove our systems work at fleet scale. You'll partner with silicon, hardware, firmware, software, and manufacturing teams, along with our ODM and CM partners. What You'll Do Create system validation plans for AI rack-scale systems at the board, tray, rack, and multi-rack cluster levels, through L11 rack integration Build validation environments, including system diagnostics, stress and burn-in tests, workload-based tests, fleet health checks, and rack acceptance tests Develop test automation that scales execution and automated triage across hundreds of racks and thousands of trays, including telemetry collection, results databases, and dashboards Lead system and rack bring-up from first power-on of trays and racks through full validation, including interoperability across compute, host, and switch trays, power, thermal and performance characterization, margin testing, and long-duration stability and reliability Drive validation through each NPI phase (Proto, EVT, DVT, PVT, and production) and define entry and exit criteria for each Debug and root-cause issues across silicon, board, firmware (BIOS/UEFI, BMC, device firmware), OS and drivers, networking, power, and thermal Drive the NPI and production ramp: define L6, L10, and L11 test content and acceptance criteria with ODM and CM partners, improve factory test yield, and support data center bring-up, field deployment, field failure analysis, and RMA Partner with silicon validation, board and system hardware, thermal, firmware, software, networking, manufacturing and test engineering, ODM and CM partners, suppliers, and data center operations What We're Looking For 5+ years of experience in system validation, system integration, or bring-up for servers, accelerators, or rack-scale systems Strong coding skills in Python, C, and C++, plus solid Linux systems experience Experience with BMC (OpenBMC), Redfish, and IPMI Proven system and rack bring-up experience, from first power-on through full validation Experience validating hardware through NPI phases (Proto, EVT, DVT, PVT) and into production Experience working with ODM and CM partners on L6/L10/L11 test content, acceptance criteria, and factory yield Strong debug skills and fluency with tools such as PCIe and Ethernet protocol analyzers, oscilloscopes, logic analyzers, JTAG debuggers, and BMC logs and telemetry Experience building test automation, telemetry, and triage infrastructure at fleet scale Deep expertise in one or more of the following: AI training and inference workloads and collectives at scale PCIe Gen5/6/7, CXL, PCIe switches, and retimers Scale-up fabrics and switches 112G/224G SerDes, copper cables and backplanes, and optics Scale-out networking, RDMA, and RoCE Rack power delivery and power management Liquid cooling and thermal System management and firmware update RAS and error handling Secure boot System performance Strong collaboration and communication skills across internal teams, manufacturing partners, and data center operations Full compensation packages are based on candidate experience and relevant certifications.  California pay range $250,000 — $300,000 USD Compensation Final offers depend on level, location, and skills relevant to the role. Additional compensation: equity grant per company guidelines; medical / dental / vision; 401(k); standard PTO.  Visa Sponsorship DensityAI sponsors qualified candidates for H-1B, O-1, TN, E-3, and other employment-based visas, and we welcome applicants on F-1 OPT and STEM-OPT. Work authorization is required at start; we provide immigration support to secure or transfer status. Export Controls Aspects of this role may involve access to information subject to U.S. export controls (EAR/ITAR). We may discuss licensing or scope adjustments during the interview. Equal Opportunity DensityAI is an Equal Opportunity Employer. We do not discriminate on the basis of race, color, religious creed, national origin, ancestry, physical or mental disability, medical condition, genetic information, marital status, sex, gender, gender identity, gender expression, age (40+), sexual orientation, military or veteran status, pregnancy, or any other status protected by law. We comply with the California CROWN Act and provide reasonable accommodations on request.