Mainspring Energy revolutionizes power generation with the world's most flexible and adaptable onsite power generator, the Linear Generator.

Mainspring Energy, a pioneering company in the power generation sector, is seeking a Staff Mechanical Design Engineer to join their team in Menlo Park. The company is revolutionizing the industry with their innovative Linear Generator technology, backed by prestigious investors including Khosla Ventures and Bill Gates.

The role focuses on designing electrical enclosures and cables while improving functionality and system-level performance of their groundbreaking power generation technology. As a Staff Engineer, you'll take on significant leadership responsibilities, guiding technical decisions and influencing design processes across teams. This position requires a unique blend of technical expertise in mechanical and electrical systems, leadership capabilities, and problem-solving skills.

The ideal candidate will bring 11+ years of experience with a BS (or 10+ years with an MS) in Mechanical Engineering, demonstrating expertise in sheet metal design, electrical component specification, and mechanical design for electrical systems. You'll lead brainstorming sessions, own engineering development projects, and mentor junior engineers while ensuring all team members work towards cohesive project goals.

This is an exceptional opportunity to join a company that's making significant strides in sustainable energy solutions, offering competitive compensation ($148,000 - $170,000), pre-IPO stock options, and comprehensive benefits. The position is based in Menlo Park, where you'll work with cutting-edge technology and collaborate with cross-functional teams to drive innovation in clean energy solutions.

Mainspring Energy values pragmatic optimism, excellence without ego, and proactive collaboration. They're committed to building a diverse and inclusive environment, welcoming candidates who might not meet all requirements but share their vision of transitioning the world to clean and affordable electricity.

Staff Mechanical Design Engineer position focusing on electrical enclosures and cables design at Mainspring Energy, revolutionizing power generation technology.

Staff Mechanical Design Engineer - Electromechanical

Mainspring Energy revolutionizes power generation with the world's most flexible and adaptable onsite power generator, the Linear Generator, for commercial, industrial, and utility applications.

Mainspring Energy is revolutionizing the power generation industry with their innovative Linear Generator technology. As a Senior Sales Engineer focusing on Data Center Markets, you'll play a crucial role in the technical sales process for this cutting-edge power generation solution. The company, backed by prestigious investors like Khosla Ventures and Bill Gates, is rapidly expanding in the $816B global electricity equipment market.

The role combines technical expertise with customer-facing responsibilities, requiring you to develop cost estimates, preliminary designs, and system architecture for data center clients. You'll work within the Project Delivery team, serving as a technical expert who bridges the gap between Mainspring's innovative technology and customer needs. The position offers the opportunity to work with a company that's actively contributing to the development of affordable, reliable, net-zero carbon grid solutions.

Your work will directly impact the company's mission to deliver clean and efficient power generation solutions to data centers. The role requires a unique blend of technical knowledge in power systems and sales engineering capabilities. You'll collaborate with cross-functional teams, travel to customer sites, and be instrumental in developing comprehensive solution proposals.

The company culture emphasizes pragmatic optimism, excellence without ego, and proactive collaboration. These values create an environment where innovation thrives and challenges are viewed as opportunities for growth. With the flexibility of remote work and competitive compensation including pre-IPO stock options, this position offers an exciting opportunity to be part of a company that's making a significant impact in sustainable energy solutions.

If you're passionate about clean energy, have a strong technical background, and enjoy working directly with customers to solve complex problems, this role offers the perfect blend of technical challenge and business impact. The position provides the opportunity to work with cutting-edge technology while contributing to a more sustainable future in the data center industry.

Senior Sales Engineer position at Mainspring Energy, focusing on data center markets, combining technical expertise with customer-facing responsibilities in innovative power generation solutions.

Senior Sales Engineer - Data Center Markets

Mainspring Energy revolutionizes power generation with the world's most flexible and adaptable onsite power generator, the Mainspring Linear Generator.

Mainspring Energy is at the forefront of revolutionizing power generation with their innovative Mainspring Linear Generator technology. As a Staff Embedded Software Engineer, you'll join a company backed by prestigious investors like Khosla Ventures and Bill Gates, operating in the $816B global electricity equipment market.

The role focuses on embedded systems development, where you'll lead crucial software initiatives for their power generation technology. You'll be responsible for developing embedded software components, mentoring team members, and architecting next-generation solutions. The position offers an exciting opportunity to work on cutting-edge technology that's already being delivered to customers across the U.S., with plans for international expansion.

The company culture is built on three core values: Pragmatic Optimism, Excellence without Ego, and Proactive Collaboration. You'll be working in their Menlo Park HQ, contributing to a mission of creating an affordable, reliable, net-zero carbon grid. The role offers a competitive compensation package of $161,000 - $189,000, plus pre-IPO stock options and benefits.

This is an ideal opportunity for an experienced embedded systems engineer who wants to make a significant impact in the clean energy sector. You'll be working with C++, embedded Linux systems, and modern development practices including CI/CD pipelines. The role provides a perfect blend of technical leadership, mentorship opportunities, and hands-on development work.

Mainspring Energy values diversity and inclusion, encouraging applications even if candidates don't meet all listed requirements. They're committed to building a collaborative environment where different perspectives and backgrounds are welcomed and valued. If you're passionate about clean energy and have strong embedded systems expertise, this role offers a chance to be part of a transformative technology company making real-world impact.

Staff Embedded Software Engineer position at Mainspring Energy, developing embedded systems for revolutionary power generation technology.

Staff Embedded Software Engineer

Mainspring Energy is at the forefront of revolutionizing power generation with their innovative Linear Generator technology. As a Senior Staff Systems Engineer, you'll be joining a company backed by prestigious investors like Khosla Ventures and Bill Gates, operating in the $816B global electricity equipment market.

The role demands expertise in architecting and integrating complex multi-domain systems that span software, electronics, and mechanical components. You'll be responsible for defining system behaviors, analyzing real-world data, and ensuring robust, high-performance operation of the Linear Generator - a sophisticated machine combining electrical, mechanical, thermodynamic, and automation subsystems.

This position offers a unique opportunity to work on cutting-edge technology that's already being delivered to customers across the U.S., with plans for international expansion. The ideal candidate will bring strong interdisciplinary expertise and a deep understanding of system component interactions. You'll be crucial in defining structured, verifiable system requirements and ensuring alignment with system validation processes.

The company culture emphasizes pragmatic optimism, excellence without ego, and proactive collaboration. Working from the Menlo Park HQ, you'll be part of a world-class engineering team focused on transitioning the world to clean and affordable electricity. The role offers competitive compensation ($183,000-$216,000) plus pre-IPO stock options and benefits.

Mainspring Energy values diversity and inclusion, encouraging applications even if candidates don't meet all listed requirements. They're committed to building a flexible and collaborative environment where different perspectives are valued. This is an exceptional opportunity to contribute to revolutionary clean energy technology while working alongside talented professionals committed to making a significant impact on global power generation.

Senior Staff Systems Engineer role at Mainspring Energy, focusing on system architecture, integration, and performance analysis for innovative power generation technology.

Senior Staff Systems Engineer

Revolutionizing power generation with the world's most flexible and adaptable onsite power generator, the Mainspring Linear Generator.

Mainspring Energy is revolutionizing the power generation industry with their innovative Linear Generator technology. As a Mechanical Engineer focusing on Alignment, you'll join a company backed by prestigious investors like Khosla Ventures and Bill Gates, working on cutting-edge clean energy solutions. The role combines hands-on mechanical design with cross-functional collaboration, offering the opportunity to impact the $816B global electricity equipment market.

The position demands expertise in mechanical engineering principles, with a focus on component alignment critical to the Linear Generator's success. You'll work with advanced tools like SolidWorks and ANSYS, while collaborating with various teams to ensure seamless integration of subsystems. The role offers exposure to the complete product lifecycle, from concept to manufacturing support.

The company culture emphasizes pragmatic optimism, excellence without ego, and proactive collaboration. Working from their Menlo Park HQ, you'll be part of a mission-driven team dedicated to creating clean, affordable, and reliable power generators. The compensation package includes competitive salary, pre-IPO stock options, and benefits, reflecting the company's investment in talent.

This is an ideal opportunity for a mechanical engineer passionate about clean energy and sustainability, offering the chance to work on innovative technology that's already being deployed across the U.S., with plans for international expansion. The role combines technical challenges with meaningful impact, as you'll be directly contributing to accelerating the world's transition to a sustainable energy future.

Join Mainspring Energy as a Mechanical Engineer focusing on alignment, working on innovative clean energy solutions with competitive compensation and equity benefits in Menlo Park.

Mechanical Engineer - Alignment

Mainspring Energy is at the forefront of revolutionizing power generation with their innovative Linear Generator technology. As a venture-backed company supported by prominent investors like Khosla Ventures and Bill Gates, they're rapidly expanding in the $816B global electricity equipment market. 

The Senior Mechanical Design Engineer role focuses on developing high-voltage linear electromagnetic machines (LEM) for improved performance, cost, and reliability. This position offers a unique opportunity to work on cutting-edge technology that's already being deployed across the U.S., with plans for international expansion.

The ideal candidate will bring deep technical expertise in mechanical engineering, particularly in electric motors/generators manufacturing, while embracing the company's values of Pragmatic Optimism, Excellence without Ego, and Proactive Collaboration. You'll be working with cross-functional teams, managing projects from concept through manufacturing launch, and contributing to the company's mission of creating an affordable, reliable, net-zero carbon grid.

The role combines computational analysis, hands-on engineering, and collaborative problem-solving. You'll be involved in everything from brainstorming innovative solutions to working directly with manufacturing teams and suppliers. The position offers competitive compensation, including stock options in a pre-IPO company, and the opportunity to make a significant impact in sustainable energy technology.

Based at the company's Menlo Park HQ, this role is perfect for someone who wants to contribute to world-class power generation technology while working in an environment that values diverse perspectives and promotes continuous innovation.

Senior Mechanical Design Engineer position at Mainspring Energy, focusing on linear electromagnetic machine development with competitive compensation and pre-IPO equity.

Senior Mechanical Design Engineer - Linear Electromagnetic Machine

Mainspring Energy is revolutionizing the power generation industry with their innovative Mainspring Linear Generator technology. As a Senior Manufacturing Engineer specializing in Tooling and Automation, you'll play a crucial role in scaling up production of this groundbreaking technology.

The position offers an exciting opportunity to work at the intersection of clean energy and advanced manufacturing. You'll be responsible for designing and implementing precision tooling, material handling systems, and automation solutions for large electromechanical machine production. The role requires expertise in precision fixture design, automation systems, and material handling solutions including AGVs and robotic cells.

The company, backed by prestigious investors like Khosla Ventures and Bill Gates, is rapidly expanding within the $816B global electricity equipment market. They value pragmatic optimism, excellence without ego, and proactive collaboration. The work environment promotes innovation and cross-disciplinary collaboration, with direct impact on the company's aggressive growth targets.

This hybrid position at their Menlo Park HQ offers a competitive salary range of $120,000-$135,000, plus pre-IPO stock options and benefits. The ideal candidate will have 5+ years of experience in manufacturing engineering, strong technical skills in CAD software, and hands-on experience with new product introduction to manufacturing process set-up.

The role provides an opportunity to contribute to the clean energy transition while working with cutting-edge manufacturing technology. You'll be part of a team dedicated to delivering high-quality, innovative solutions for commercial, industrial, and utility customers across the U.S., with plans for international expansion.

Mainspring Energy maintains a strong commitment to diversity and inclusion, encouraging applications from candidates who may not meet all listed requirements but share the company's vision for clean and affordable electricity.

Senior Manufacturing Engineer position at Mainspring Energy focusing on tooling and automation for revolutionary power generation technology.

Senior Manufacturing Engineer - Tooling and Automation

Mainspring Energy is revolutionizing the power generation industry with their innovative Linear Generator technology. As a Controls and Commissioning Engineer, you'll play a crucial role in designing and implementing clean power solutions for commercial and industrial customers. The position combines technical expertise in power systems controls with hands-on field work, requiring both engineering prowess and customer interaction skills.

The role involves developing technical documentation, leading site acceptance testing, programming PLCs, and ensuring seamless integration of power generation systems. You'll work with cutting-edge technology in the clean energy sector, supported by top-tier investors like Khosla Ventures and Bill Gates. The company culture emphasizes pragmatic optimism, excellence without ego, and proactive collaboration.

This position offers an exciting opportunity to contribute to the transition toward clean and affordable electricity while working with a diverse team of professionals. The role requires travel up to 50% of the time, allowing you to work on various projects nationwide. Mainspring offers competitive compensation, including pre-IPO stock options and comprehensive benefits.

The ideal candidate will bring strong technical skills in power systems and controls, along with excellent communication abilities to work effectively with customers and cross-functional teams. The company values diversity and inclusion, welcoming candidates from various backgrounds who might not meet all listed requirements but share the passion for clean energy innovation.

Senior Controls and Commissioning Engineer position at Mainspring Energy, focusing on clean power generation systems and customer solutions implementation.

Controls and Commissioning Engineer

Mainspring Energy, a revolutionary power generation company, is seeking an Associate Manufacturing Engineer to join their NPI Automation Group. The company is backed by prominent investors like Khosla Ventures and Bill Gates, and is transforming the $816B global electricity equipment market with their innovative Mainspring Linear Generator technology.

The role offers an exciting opportunity to work on cutting-edge power generation technology in a rapidly growing company. As an Associate Manufacturing Engineer, you'll be instrumental in transitioning breakthrough Linear Generator technology to volume manufacturing. The position involves both supporting existing manufacturing test processes and developing new ones, working with cross-functional teams including software, controls, mechanical, electrical, and test engineering.

The ideal candidate should have a strong engineering background with at least one year of experience in production environments. You'll be working with various manufacturing test automation systems, requiring both mechanical and electrical engineering skills. The role demands proficiency in programming languages like Python, C++, or MATLAB, and expertise in CAD software, preferably Solidworks.

What makes this role particularly attractive is the opportunity to work with a company that values pragmatic optimism, excellence without ego, and proactive collaboration. The position offers competitive compensation ($85,000-$98,000) plus pre-IPO stock options and benefits. Based in Menlo Park, California, this role provides the chance to work with cutting-edge technology while contributing to the development of clean and affordable electricity solutions.

The company culture emphasizes diversity, inclusion, and flexibility, welcoming candidates who might not meet all listed requirements but share the vision of transitioning the world to clean energy. This is an excellent opportunity for someone looking to make a significant impact in the renewable energy sector while working with a team of talented professionals.

Associate Manufacturing Engineer position at Mainspring Energy focusing on automation and test equipment implementation in industrial environment.

Associate Manufacturing Engineer - NPI Automation Group

Mainspring Energy is revolutionizing the power generation industry with their innovative Linear Generator technology. As a Staff Mechanical Engineer, you'll be at the forefront of developing crucial components for their groundbreaking power generation system. The role focuses on the design and optimization of piston and ring systems without liquid lubricant, which is key to reducing emissions and maintenance costs.

The company, backed by prestigious investors including Khosla Ventures, Bill Gates, and American Electric Power, is rapidly expanding in the $816B global electricity equipment market. They're seeking exceptional talent to join their mission of creating an affordable, reliable, net-zero carbon grid.

The position offers an exciting opportunity to work on challenging engineering problems involving complex 3D shapes, sliding seals, and high-pressure/temperature systems. You'll be responsible for leading development projects, conducting detailed analyses, and working hands-on in the lab to optimize performance and investigate failure modes.

Mainspring Energy values pragmatic optimism, excellence without ego, and proactive collaboration. They foster an inclusive environment where diverse perspectives are welcomed and appreciated. The company offers competitive compensation, including pre-IPO stock options and comprehensive benefits.

Located in their Menlo Park HQ, this role is perfect for an experienced mechanical engineer who wants to make a significant impact on clean energy technology. The position requires either a Masters with 10+ years of experience or a PhD with 7+ years of experience, along with expertise in CAD software and strong understanding of structural mechanics and heat transfer.

Join Mainspring Energy to be part of a team that's transforming the future of power generation while addressing critical environmental challenges. The company's commitment to diversity and inclusion means they welcome applications from candidates who might not meet all listed requirements but are passionate about contributing to clean and affordable electricity.

Lead mechanical engineering role focusing on innovative piston and ring system development for clean energy power generation technology at Mainspring Energy.

Staff Mechanical Engineer

Mainspring Energy is at the forefront of revolutionizing power generation with their innovative Mainspring Linear Generator technology. As a Senior Field Quality Engineer, you'll play a crucial role in maintaining and improving quality standards as the company rapidly scales its production and deployment of generators.

The position offers an exciting opportunity to work with cutting-edge technology in the clean energy sector, backed by prestigious investors like Khosla Ventures and Bill Gates. You'll be joining a company that's actively contributing to the development of an affordable, reliable, net-zero carbon grid within the $816B global electricity equipment market.

The role demands a unique combination of technical expertise and customer-focused mindset. You'll be responsible for developing relationships with various teams, becoming an expert in the entire process from testing to deployment, and driving quality improvements across the organization. The position requires up to 50% travel to customer sites, offering hands-on experience with the technology and direct customer interaction.

Mainspring Energy values pragmatic optimism, excellence without ego, and proactive collaboration. The company offers competitive compensation ($115,000 - $135,000) plus pre-IPO stock options and benefits. This is an ideal opportunity for a quality engineering professional who wants to make a significant impact in the clean energy sector while working with a rapidly growing, innovative company.

The role is based at the company's Menlo Park HQ, where you'll work alongside talented professionals dedicated to transitioning the world to clean and affordable electricity. Mainspring Energy maintains a strong commitment to diversity, inclusion, and equal opportunity employment, making it an attractive workplace for professionals from various backgrounds.

Senior Field Quality Engineer position at Mainspring Energy focusing on quality assurance and improvement of power generation systems.

Senior Field Quality Engineer

Mainspring Energy, a revolutionary company in the power generation sector, is seeking a Senior Mechanical Engineer to join their cylinder design team. The company is backed by prominent investors including Khosla Ventures, Bill Gates, and American Electric Power, and is making waves in the $816B global electricity equipment market with their innovative Linear Generator technology.

The role focuses on leading the development of reaction cylinder components for their groundbreaking Linear Generator technology. This is a critical position that requires both technical expertise and creative problem-solving skills. The successful candidate will be responsible for everything from initial design and 3D CAD modeling to engineering analysis and comprehensive testing.

The position offers an exciting opportunity to work on clean energy solutions that are actively transforming the power generation landscape. The company culture is built on three core values: Pragmatic Optimism, Excellence without Ego, and Proactive Collaboration. These values guide their approach to creating innovative solutions while maintaining a collaborative and respectful work environment.

Working at the Menlo Park HQ, you'll be at the forefront of developing technology that's already being deployed across the U.S., with plans for international expansion. The role offers competitive compensation ($126,000 - $148,000) plus pre-IPO stock options and benefits, reflecting the company's commitment to attracting top talent.

This is an ideal opportunity for an experienced mechanical engineer who is passionate about clean energy and wants to make a significant impact on sustainable power generation. The position combines technical leadership with hands-on engineering work, offering a perfect balance of challenge and innovation. If you're excited about creating clean, affordable, and reliable power generators that accelerate the world's transition to a sustainable energy future, this role could be your next career move.

Senior Mechanical Engineer position focused on cylinder design for innovative power generation technology at Mainspring Energy.

Senior Mechanical Engineer - Cylinder Design

Mainspring Energy is revolutionizing the power generation industry with their innovative Mainspring Linear Generator technology. As a Staff Enterprise Data Systems Developer, you'll play a crucial role in developing and implementing business process solutions for this rapidly growing company.

The position offers an exciting opportunity to work with a company backed by prominent investors like Khosla Ventures and Bill Gates, operating in the $816B global electricity equipment market. You'll be joining a team that values pragmatic optimism, excellence without ego, and proactive collaboration.

In this role, you'll be directly involved with all facets of the business, working cross-functionally across departments to deliver user-friendly solutions. You'll be responsible for creating and improving business processes through enterprise software systems, including CRM, ERP, MRP, and Fleet Service Management Systems.

The ideal candidate brings 10+ years of experience in enterprise systems configuration and development, with strong expertise in QuickBase database programming. You'll be working on critical projects such as customer management systems, product change management processes, and production operations business flows.

The position offers a competitive salary range of $145,000 - $170,000, along with pre-IPO stock options and benefits. Based in Menlo Park HQ with a hybrid work arrangement, this role provides an opportunity to contribute to Mainspring's mission of transitioning the world to clean and affordable electricity.

You'll be working in a diverse and inclusive environment that values different perspectives and backgrounds. The company shows flexibility in considering candidates who may not meet all requirements but demonstrate strong potential and alignment with their mission.

This is an excellent opportunity for an experienced enterprise systems developer who wants to make a significant impact in a growing clean energy company, helping to scale and optimize business processes while contributing to a sustainable future.

Staff Enterprise Data Systems Developer role at Mainspring Energy, focusing on enterprise software systems development and business process optimization.

Mainspring Energy Engineering Jobs

Mainspring Energy revolutionizes power generation with the world's most flexible and adaptable onsite power generator, the Linear Generator.