About the RoleRole SummaryAmperesand is looking for a
Senior or Staff level Thermo-Mechanical Design Engineer to develop an advanced liquid-cooling system for its next-generation medium-voltage solid-state power conversion platform. This is a hands-on role where you'll develop the thermal system through architecture and concept selection, system sizing and modeling, CAD and detailed design, thermal CFD simulation, coolant and airflow routing, design for manufacturing and assembly, thermal system validation, and troubleshooting.
You'll work closely with mechanical, electrical, manufacturing, quality, suppliers, and factory teams to design, develop, and build the best system for a novel application, solve problems that don't have established answers, with the opportunity to own thermal design. Thermal performance is critical to the overall performance of our solid-state power converter and a key differentiator for Amperesand. We are looking for someone with deep expertise in thermals, system modeling and simulation, detailed design experience, and a track record of complex technical work and solving novel problems. We are not looking for someone who simply executes to a defined specification. The role can be based in Reno, San Francisco, or the South Bay.
What You'll Do- Develop the thermal system for Amperesand's solid-state power conversion platform from architecture into mass-production.
- Work on architecture and concept selection.
- Model the thermal system performance across our operating conditions and mission profiles.
- Detailed design of the thermal system components, including 3D and 2D CAD of structures, coolant routing, interconnections, and thermal CFD.
- Partner with the manufacturing and quality teams on DFM/DFA activities to ensure the thermal system design is manufacturable.
- Prototyping and validation of the thermal system.
- Problem solving anywhere and everywhere between architecture and start of production.
What You'll Bring- Years of experience: 3+ for Senior level, 6+ for Staff level
- BS in mechanical engineering or a closely related field, Masters or PhD are a plus
- Liquid-cooling thermal system and mechanical design experience, CAE expertise
- Compressor-loop refrigeration system experience
- Demonstrated ability to deliver a thermal system and solve novel engineering problems
- Hands-on testing and validation experience
Nice to Have- Experience with Catia 3DX
- Experience with Siemens Amesim or similar
- Familiarity with high-voltage design
How We WorkEmployment Type:
• Full-time
Location:San Francisco/
Work Model:• Onsite
Travel Requirements:Travel to the factory in Reno during builds will be required, ~20% for 1-2mo/yr
Onsite Collaboration Rationale:Given the highly collaborative and cross-functional nature of hardware, embedded systems, and product development, in-person partnership across engineering and product teams is critical to enabling rapid execution, technical alignment, and successful development outcomes.
Why Join Amperesand• Work on next-generation power infrastructure systems
• High ownership and visibility
• Cross-functional collaboration
• Opportunity to shape future products and infrastructure
• Fast-moving startup environment
Please note: This role requires working on-site 5 days a week. We do not offer hybrid or remote options.
While this role is listed for the location above, we may consider candidates in other locations on a case-by-case basis.Onsite Collaboration Rationale:Given the highly collaborative and cross-functional nature of hardware, embedded systems, and product development, in-person partnership across engineering and product teams is critical to enabling rapid execution, technical alignment, and successful development outcomes.
Why Join Amperesand- Work on next-generation power infrastructure systems
- High ownership and visibility
- Cross-functional collaboration
- Opportunity to shape future products and infrastructure
- Fast-moving startup environment
Pay Disclosure & BenefitsCompensation will be determined based on experience, location, and other factors permitted by law.
The benefits outlined below apply exclusively to employees located in the
United States:- Competitive Salary + Incentive Stock Options
- Medical, vision, and dental benefits for employees and their dependents, effective from the start of hire
- Company paid Basic Life, AD&D, short-term and long-term disability insurance
- 401k retirement savings plan through Empower
- Employees receive paid time off (PTO), paid sick days, and paid company holidays
- 100% paid maternal leave (12 weeks) and paternal leave (6 weeks)
The benefits outlined below apply to employees located in
Singapore:
- Competitive Salary + Incentive Stock Options
- Group medical, hospitalisation and surgical insurance, outpatient or GP coverage, group term life, dental and personal accident insurance
- Employer and employee Central Provident Fund contributions in accordance with the CPF Act (for Singapore Citizens and Permanent Residents)
- Annual leave, paid sick leave, hospitalisation leave, and all Singapore public holidays, in line with or exceeding the Employment Act
- Commuter Benefits
- Government-paid maternity, paternity, shared parental, and childcare leave in accordance with prevailing Singapore statutory entitlements
Additional benefits may be available depending on the role and employment type. Benefits are subject to the terms of applicable company policies and plans.
Candidate Confidentiality & Information Protection As part of our commitment to protecting confidential and proprietary information, candidates should not disclose or provide Amperesand with any confidential, proprietary, or trade secret information belonging to a current or former employer or any other third party during the application or interview process.
Please do not submit or present employer-owned source code, schematics, designs, technical documentation, internal presentations, customer information, prototypes, or other confidential materials. Candidates should discuss their experience and accomplishments at an appropriate level and use only information and materials they are authorized to share.
