Cryogenics Engineer

About Us  

Maybell Quantum is building the hardware foundation of the quantum era. Our redesigned dilution refrigerator gives labs more fridges per room, more experiments per fridge, and a level of reliability and usability the field has never had. We are a fast-growing, venture-backed team of scientists and engineers, and the cryogenic systems we design in Denver ship to leading quantum computing groups around the world.  

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 tea m to elevate our products ,  d rive customer success from installation through long-term operation , and delive r an exceptional customer experience .  

What You'll Do  

Test ,  Validat e, & Iterate  

• Develop Test Plans : B uild 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 T roubleshoot: 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 te sts 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.