Senior Software Test Engineer at Illumina responsible for designing and executing comprehensive test strategies for complex instruments in a regulated medical device environment. The role requires troubleshooting across hardware and software boundaries, working hands-on with physical laboratory instruments, and managing defects and requirements through industry-standard platforms. Candidates should have strong debugging and analytical skills, familiarity with embedded systems and communication protocols, and experience in regulated environments; AI-assisted tools and Linux command-line proficiency are valued additions.