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Principal Mechanical Engineer

Boston, MA

About SimpliSafe

We’re a high-tech home security company that’s passionate about protecting the life you’ve built and our mission of keeping Every Home Secure. And we’ve created a culture here that cares just as deeply about the career you’re building. Ours is a no ego culture of collaboration and innovation where those seeking their next challenge can find big opportunities and make a huge impact on the lives of all those who we protect. We don’t just want you to work here. We want you to grow and thrive here. 

We’re embracing a hybrid work model that enables our teams to split their time between office and home. Hybrid for us means we expect our teams to come together in our state-of-the-art office on two core days, typically Tuesday and Wednesday, to work together in person, and teams can choose where they work for the remainder of the week. We all benefit from flexibility and get to use the best of both worlds to get our work done.

Why are we hiring?

Well, we’re growing and thriving. So, we need smart, talented, and humble people who share our values to join us as we disrupt the home security space and relentlessly pursue our mission of keeping Every Home Secure.

What You’ll Do

We are seeking a highly experienced Principal Mechanical Engineer to help lead the mechanical design and development of our innovative direct-to-consumer product, which integrates hardware, software, and firmware components. In this role, you will be responsible for driving product design from concept through production, ensuring the highest standards of performance, reliability, and manufacturability. The ideal candidate will have a passion for understanding the customer and delivering outstanding user experiences, an expert grasp of mechanical systems, and experience working with consumer hardware products.

Primary Responsibilities Include:

  • Lead the mechanical design, analysis, and development of consumer hardware products, focusing on performance, durability, and aesthetics.
  • Collaborate closely with cross-functional teams and in particular, acting as a conduit between industrial design, product management, and engineering.
  • Drive the product development process from early-stage concept, through prototyping, testing, and production, to ensure products meet quality, cost, and schedule targets.
  • Utilize 3D CAD software (e.g., SolidWorks, Creo) to develop mechanical models, assemblies, and detailed drawings.
  • Perform engineering calculations and simulations to ensure mechanical integrity, thermal performance, and manufacturability.
  • Oversee prototype development and testing, including designing test plans to validate product performance and resolve issues.
  • Lead design reviews and work closely with suppliers and global manufacturing partners to optimize the design for mass production.
  • Stay current with emerging technologies, materials, and manufacturing processes to inform product design and innovation.
  • Mentor and provide technical guidance to junior engineers, helping them to develop their skills and advance their careers.

What You’ll Bring:

  • Bachelor’s or Master’s degree in Mechanical Engineering or a related field.
  • 8+ years of mechanical engineering experience, with at least 5 years working on consumer products.
  • Proven experience leading the design and development of complex mechanical systems from concept to mass production.
  • Expertise in CAD tools (SolidWorks, Creo) and familiarity with simulation tools (e.g., FEA, CFD).
  • Strong understanding of materials science, manufacturing processes (injection molding, die casting, stamping, CNC machining), and DFM principles.
  • Experience partnering closely with industrial designers to balance aesthetics with mechanical function and manufacturability.
  • Experience working together with product management to understand the “why” and to be the voice of the customer.
  • Proven ability to collaborate with cross-functional teams, manage project timelines, and deliver high-quality products on time.
  • Experience vetting and working with global suppliers and manufacturing partners.
  • Excellent problem-solving skills, with the ability to think critically and creatively to resolve technical challenges.
  • Strong communication, EQ, and leadership skills, with the ability to guide and mentor junior engineers.

What Values You’ll Share

  • Customer Obsessed - Building deep empathy for our customers, putting them at the core of our work, and developing strong, long-term relationships with them.
  • Aim High - Always challenging ourselves and others to raise the bar.
  • No Ego - Maintaining a “no job too small” attitude, and an open, inclusive and humble style.
  • One Team - Taking a highly collaborative approach to achieving success.
  • Lift As We Climb - Investing in developing others and helping others around us succeed.
  • Lean & Nimble - Working with agility and efficiency to experiment in an often ambiguous environment.

We wholeheartedly embrace and actively seek applications from all individuals, no matter how they identify. We are committed to cultivating a diverse and inclusive workplace, and we believe our work is enriched when we incorporate a multitude of perspectives, backgrounds, and experiences. We want everyone who works here to thrive and contribute to not only our mission of keeping every home secure, but also to making our workplace safe and supportive for others. If a reasonable accommodation may be needed to fully participate in the job application or interview process, to perform the essential functions of a position, or to receive other benefits and privileges of employment, please contact careers@simplisafe.com.

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