Senior Software Developer In Test Jobs in Livermore, CA

Job Summary:
d-Matrix is focused on unleashing the potential of generative AI to transform technology, emphasizing a culture of respect and collaboration. They are seeking a Principal Software Engineer in Test to lead their Software Qualification team, responsible for setting the technical direction for test strategy and mentoring junior engineers while ensuring the quality of their AI compute engine's software stack.
Responsibilities:
• Lead and mentor junior QA engineers in test planning, test case design, automation best practices, and systematic debugging.
• Define test coverage strategies for new features and deployment scenarios in collaboration with product, software, and systems teams.
• Drive root cause analysis for test failures and escaped defects; own resolution workflows with engineering counterparts.
• Represent the Software Qualification team in cross-functional design and planning reviews, surfacing quality risks early.
• Design, implement, and maintain scalable Python-based test suites within the Pytest framework, covering both software and system-level use cases.
• Build and improve the d-Matrix end-to-end test suite and regression test suite, integrated into CI/CD pipelines using Jenkins and GitLab.
• Develop and maintain test infrastructure that supports rapid, reliable validation of workloads and ML models across hardware and software configurations.
• Write high-quality Python programs applying advanced data structures and algorithms to complex testing scenarios.
• Design and execute test cases covering lower-layer stack components including FPGAs, bootloaders, and host runtime drivers.
• Validate firmware behavior, embedded architectures, and IO technologies including PCIe interfaces.
• Test integration across CPUs, GPUs, and d-Matrix AI accelerators, ensuring correct end-to-end system behavior.
• Engage deeply in software bug triaging and debugging — including complex, ambiguous issues that span hardware and software boundaries.
• Partner with software development, product, and systems teams on test coverage planning and result interpretation.
• Clearly communicate test plans, quality status, and risk assessments to both technical and non-technical stakeholders.
• Contribute to shared QA standards, tooling, and documentation used across the engineering organization.
Qualifications:
Required:
• Master’s degree in Computer Science, Computer Engineering, Electrical Engineering, or a related field, with 10+ years of industry experience.
• 8+ years of experience in software development with strong command of data structures and algorithms.
• 8+ years of experience developing and testing lower-layer software stacks including FPGAs, bootloaders, and host runtime drivers.
• 5+ years of experience in firmware design, implementation, and troubleshooting.
• 3+ years of experience with embedded architectures and IO technologies, including PCIe, GPUs, and CPUs.
• Fluency in Python programming; ability to write production-quality test code applying advanced data structures and algorithms.
• Proven ability to debug complex, multi-layered issues spanning hardware and software.
• Comfort navigating ambiguous, open-ended problems and driving toward structured, measurable outcomes.
• Excellent verbal and written communication skills; able to represent quality concerns clearly across engineering, product, and leadership.
Preferred:
• Experience with machine learning frameworks and ML accelerator architectures; familiarity with the software stack required to run ML workloads on custom silicon.
• Knowledge of Large Language Models (LLMs), their operational characteristics, and the inference stack — particularly in the context of hardware-software co-design.
• Prior experience in a principal or staff-level QA or test engineering role with demonstrated team leadership and mentorship.
Company:
D-Matrix is a platform that enables data centers to handle large-scale generative AI inference with high throughput and low latency. Founded in 2019, the company is headquartered in Santa Clara, USA, with a team of 51-200 employees. The company is currently Growth Stage.