We are seeking a Cryogenics Engineer to test, validate, troubleshoot, and refine our products and the subsystems that comprise them. You will work alongside our R&D scientists, mechanical and electrical engineers, and manufacturing team to elevate our products, drive customer success from installation through long-term operation, and deliver an exceptional customer experience. What You'll Do Test, Validate, & Iterate • Develop Test Plans: Build comprehensive experiments that push our products to the limit to ensure the highest quality standards-and to find ways for "the best to perform even better." • Operate and Troubleshoot: Become the equivalent of a "test pilot" for the most advanced cryogenic systems in the world, with a heavy focus on evaluating the user experience and risks to uptime. • Drive Innovation: Work with our product and engineering teams to refine our platforms' designs based on your tests and discoveries. Support our Customer Success Team • Support Global Operations: Partner with our customers to root-cause and solve issues, allowing them to achieve the next breakthrough in quantum computing. Occasionally travel on site to assist when required. • Build our Customer Success Infrastructure: Document test, and inspection procedures to ensure a common standard across the company and the highest level of customer support. Safety & Standards • Engineer for Safety: Apply pressure-safety, relief-sizing, and oxygen-deficiency hazard practices to systems that handle helium-3/helium-4 mixture, liquid nitrogen, and high vacuum. Who You Are Required: • Bachelor's degree (or higher) in mechanical engineering, physics, or an equivalent technical field. • 3+ years of hands-on experience designing, building, or operating cryogenic systems. • Strong grounding in heat transfer, thermodynamics, and fluid mechanics at cryogenic temperatures, including low-temperature material properties. • Hands-on experience with high-vacuum systems and helium leak detection. • Experience safely handling cryogens such as liquid nitrogen and liquid helium. • Proficiency in 3D CAD (SolidWorks preferred) and analysis tools such as Python, MATLAB, or ANSYS. • Strong written and verbal communication skills. • Self-starter who can drive results independently in a fast-moving environment. • Able to work on-site in Denver, CO. Preferred: • Experience designing, building, or significantly modifying dilution refrigerators or other sub-kelvin systems (ADRs, helium-3 systems). • Master's degree or PhD in a relevant field. • Experience with helium-3/helium-4 gas-handling systems. • Experience with brazing, welding, indium seals, or other cryogenic joining and sealing methods. • Background in quantum computing, scientific instrumentation, or superconducting hardware. • Experience with pressure-system design under ASME or equivalent codes. • Experience in a high-growth, venture-backed startup. What We Offer • Base Salary: $90,000 - $120,000/yr, depending on experience and qualifications, plus equity and performance bonus. • Benefits: Medical, dental, and vision insurance; 401(k); paid time off and paid holidays • Impact: Direct influence on the success of a company developing revolutionary technology. • Exceptional Team: Collaboration with world-class scientists, engineers, and business leaders who are defining a new industry.