Senior Mechanical Engineer - Thermal Systems

Eight Sleep is the world’s first sleep fitness company. Our mission is to fuel human potential through optimal sleep. We use innovative technology, detailed design, and proven science and data to personalize and improve each night for everybody—changing the way people sleep forever and for the better. 

With our flagship product, the Pod, we are addressing critical sleep issues such as temperature regulation, bed elevation, snoring reduction, and the wake-up experience. Hundreds of thousands of customers around the world sleep better every night thanks to the Pod.

But we’re just getting started. We’re committed to developing more groundbreaking products to tackle additional sleep problems, changing the role sleep plays in our lives forever. We’re excited about the journey ahead and the impact we can make as we continue to innovate and expand our offerings to fulfill our mission.

We are backed by leading Silicon Valley investors like YC Combinator, Founders Fund, Valor, and Khosla Ventures, and we have been recognized as one of Fast Company’s Most Innovative Companies in 2018, 2022, and 2023.The Pod was also recognized two years in a row by TIME's “Best Inventions of the Year.” We currently sell the Pod in the United States, Canada, the United Kingdom, Europe, and Australia.

Before you apply

Eight Sleep is an intense environment: we’re demanding and ambitious, which means we ask a lot of ourselves and one another. This means fantastic learning, achievements, and career growth, but it also requires a significant commitment. Our dedication, drive, and intensity rivals those of Olympic athletes. At Eight Sleep, we have Kobe Bryant’s mamba mentality - we always aim to be at the best 1% of what we do. If you’re looking for a 9-5, this is not for you. Our employees report working up to 60 hours per week. If you want to be challenged and pushed harder than ever before, we invite you to apply.

The role

We’re looking for an experienced Senior Mechanical Engineer with a strong focus on thermal systems to help develop innovative products from concept through to production. You'll take ownership of the thermal performance of our systems including the thermal engine in the Pod Hub and the thermal core of the Pod Cover. You'll design mechanical components and work cross functionally with our engineering and product teams. You’ll be part of a small, mission-driven team and have significant ownership over decisions. We’re growing quickly so there are ample opportunities for career growth.

The position is based out of our San Francisco office and requires ~20% travel to China to support manufacturing activities.

How you’ll contribute

• Own thermal subsystems by developing and optimizing active thermal regulation systems using custom TECs, heatsinks, fabrics, and other thermal regulation strategies

• Architect and design products by driving mechanical system architecture through ideation, CAD, rapid prototyping, and iteration, factoring in manufacturing, cost, and reliability, and collaborating with cross-functional teams for seamless subsystem integration.

• Perform thermal and fluid analyses using simulation tools, validate designs with lab testing (e.g. - temp sensors, thermal cameras) and DOEs, then correlate data to real-world performance to refine solutions and conduct root-cause analyses.

• Partner with suppliers in Asia to drive design for manufacturability and assembly (DFM/DFA), oversee build processes, troubleshoot manufacturing challenges, and implement continuous improvements during pilot builds and production ramps.

• Contribute beyond thermal aspects by supporting general mechanical design (plastic enclosures, metal stamping, soft goods integration)

What you need to succeed

• 5+ years of experience in mechanical design and thermal management (e.g., TECs, heatsinks, heat pipes, insulation strategies, thermally conductive fabrics).

• Experience shipping high-volume consumer products, including manufacturing support in Asia.

• Highly proficient in CAD (e.g. Solidworks, NX, Creo), DFM/DFA, and GD&T.

• Strong understanding of heat transfer fundamentals, thermal instrumentation, DOEs, and root cause analysis techniques.

• Highly proficient in data analysis techniques (e.g. - Python, Matlab)

• BSME or equivalent (MS preferred)

• Willingness and ability to travel to China as needed

Why join Eight Sleep?

Innovation in a culture of excellence

Join us in a workplace where innovation isn’t just encouraged - it’s a standard. Our flagship product, the Pod, is a testament to our culture of excellence, bel