Principal Software Engineer in Test; SDET

At d-Matrix
, we are focused on unleashing the potential of generative AI to power the transformation of technology. We are at the forefront of software and hardware innovation, pushing the boundaries of what is possible. Our culture is one of respect and collaboration.

We value humility and believe in direct communication. Our team is inclusive
, and our differing perspectives allow for better solutions. We are seeking individuals passionate about tackling challenges and are driven by execution. Ready to come find your playground?
Together
, we can help shape the endless possibilities of AI.

We are looking for a Principal Software Engineer in QA to join our Software Qualification team and play a central role in productizing the d-Matrix AI compute engine. This is a senior individual contributor role with team leadership responsibilities — you will both set the technical direction for test strategy and directly mentor and guide junior engineers through test planning, automation, and execution.

You will work side by side with software development, product, and systems teams to design, automate, and execute comprehensive test suites covering the features, functionalities, and deployment scenarios of our next-generation AI chip software stack. You will own the development and continuous improvement of d-Matrix’s end-to-end and regression test infrastructure, bringing rigor and scalability to quality across the full stack — from low-level firmware and hardware interfaces up through runtime and ML workload execution.

• 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 Git Lab.
• 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.

• 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;…