QA Engineer (Software)

**About Vast.ai** Vast.ai democratizes and decentralizes AI by running the world’s largest peer\-to\-peer GPU marketplace. Our platform already powers thousands of training runs and production workloads at a fraction of hyperscaler prices. We’re a fast\-growing startup based in Los Angeles and San Francisco, on a mission to organize, optimize, and orient the world’s computation. **About the Role** We’re hiring a QA Engineer to drive both manual and automated testing across our web applications and backend services in a Linux\-first environment. This role is central to shipping reliable, high\-performance software for a complex, always\-on platform. You’ll work closely with Product and Engineering to define quality standards, catch issues early, and help deliver confident releases. **This role is onsite 5 days a week in our Los Angeles (Westwood) office.** **What You'll Do** * Execute manual, exploratory, and regression testing for web apps and backend services * Maintain and expand test plans for existing and upcoming features * Design high\-signal test cases and build/extend automation where it matters most * Validate requirements and ensure releases are stable and defect\-free * Investigate failures, identify root causes, and file clear, actionable tickets * Partner with Product and Engineering on acceptance criteria and release readiness **Minimum Qualifications** * 3\+ years hands\-on testing of web applications * Strong knowledge of test methodologies and their corresponding tools * Experience with writing test plans and test cases for assigned features * Experience with test automation * Keen eye for detail **Nice to Have** * Passionate about the future of AI * API testing with Postman/Newman or similar * Proficient with Linux * Experience with load testing tools **Benefits** * Work 5 days a week from the Vast.ai HQ in Los Angeles (Westwood) in an ambitious, fast\-paced, AI\-centered startup environment * Health, dental, vision and life insurance