Mechanical Engineer II (NPI)

WHOOP; Boston (MA); On-site; USD 110,000 - 150,000; Full time

Job summary

WHOOP is seeking a Mechanical Engineer II to join the Hardware NPI Team in Boston, MA. You will design and develop rechargeable energy accessories, prototype and test components, and document specifications for manufacturing release.

You will collaborate across functions, support validation, and work with global suppliers and contract manufacturers. This role requires hands-on prototyping, strong communication, and a passion for wearables and health tech.

Qualifications

• Bachelor’s degree in Mechanical Engineering or related field.
• 2+ years of experience in the design of complex mechanical products.
• Experience with SolidWorks CAD best practices, including advanced assemblies and DFx.
• Hands-on experience with rapid prototyping tools to craft proof-of-concept models.
• Experience with high-volume manufacturing processes and fast-paced environments.

Responsibilities

• Own critical parts of the next generation Whoop Hardware Products.
• Design, prototype, and test mechanical components around microelectronics.
• Develop and present multiple design solutions for complex challenges.
• Generate technical documentation: 3D files, 2D drawings, BOMs, ECOs.
• Communicate engineering requests to vendors and contract manufacturers.
• Support verification/validation plans and DOE-driven insights.
• Perform root cause analyses and collaborate with senior engineers.

Skills

SolidWorks CAD

Prototyping

Cross-functional collaboration

Manufacturing knowledge

Education

Bachelor's in Mechanical Engineering

Tools

3D printing

Job description

At WHOOP, we're on a mission to unlock human performance and healthspan. WHOOP empowers members to perform at a higher level through a deeper understanding of their bodies and daily lives.

As a Mechanical Engineer II on the Hardware NPI Team at WHOOP, you will contribute to the design and development of WHOOP’s innovative hardware solutions - rechargeable energy accessories. You thrive in a fast-paced, execution-driven setting and can drive creative mechanical design solutions with independence and sound technical judgement. You’ll work alongside a multidisciplinary team of engineers and designers to help bring innovative concepts to life, supporting prototyping, mechanical design, and testing efforts. You will work closely with our suppliers and contract manufacturers around the world to execute engineering validation builds with a focus on high quality deliverables, sharp engineering risk management, clear technical communication upwards and externally, and commitment to product excellence. This is a great opportunity for an engineer with a solid technical foundation to grow their skills in a dynamic, fast-paced environment while contributing to impactful projects in early-stage product development. WHOOP operates with urgency because our mission demands it. We build products for people who push their limits—and we hold ourselves to the same standard. If you’re energized by complex challenges, cross-functional collaboration, and the opportunity to ship hardware at scale, this role will push you—and reward you.

RESPONSIBILITIES:

• Own critical parts of the next generation Whoop Hardware Products
• Design, prototype, and test complex mechanical components around microelectronics, meeting stringent technical, performance, and industrial design requirements to guide projects from concept through manufacturing release.
• Develop and present multiple design solutions for novel and complex technical challenges, articulating them clearly to cross-functional teams and documenting design process and specifications thoroughly.
• Generate technical documentation such as 3D files, 2D drawings, bills of material (BOM’s), and Engineering Change Orders (ECO’s) following product development cycle timeline
• Communicate engineering requests and changes to vendors and contract manufacturers as the product development cycle progresses
• Support planning and execution of verification and validation plans, leveraging design of experiments (DOE) methodologies to drive understanding, uncover insights, and deliver actionable results that enhance product quality, performance, and manufacturability.
• Support and perform thorough engineering root cause analyses to identify and resolve issues
• Collaborate with senior engineers to evaluate new technologies and manufacturing methods.
• Up to 20% travel to contract manufacturers and suppliers internationally

QUALIFICATIONS:

• Bachelor’s degree in Mechanical Engineering or related field.
• 2+ years of experience in the design of complex mechanical products, preferably for consumer electronics, wearables, or medical devices.
• Experience with SolidWorks CAD best practices, including advanced assemblies, complex surfacing, configuration management and applying DFx feedback.
• Hands-on experience in operating and maintaining rapid prototyping tools to craft proof-of-concept models.
• Strong communication skills and comfort working with cross-functional teams and external partners.
• Experience in high-quality consumer electronics or wearable technologies preferred.
• Familiarity with validation testing methods and statistical analysis tools preferred.
• Experience with high-volume manufacturing processes (e.g., injection molding, sheet metal design, metal injection molding) and manual assembly preferred.
• Working experience in a fast-paced or startup environment preferred.
• A passion for health, or wearable technologies; and designing human-centered solutions in this space.

This role is based in the WHOOP office located in Boston, MA. The successful candidate must be prepared to relocate if necessary to work out of the Boston, MA office.

Interested in the role, but don’t meet every qualification? We encourage you to still apply! At WHOOP, we believe there is much more to a candidate than what is written on paper, and we value character as much as experience. As we continue to build a diverse and inclusive environment, we encourage anyone who is interested in this role to apply.

WHOOP is an Equal Opportunity Employer and participates in E-verify to determine employment eligibility

The WHOOP compensation philosophy is designed to attract, motivate, and retain exceptional talent by offering competitive base salaries, meaningful equity, and consistent pay practices that reflect our mission and core values.

At WHOOP, we view total compensation as the combination of base salary, equity, and benefits, with equity serving as a key differentiator that aligns our employees with the long‑term success of the company and allows every member of our corporate team to own part of WHOOP and share in the company’s long‑term growth and success.

The U.S. base salary range for this full-time position is $110,000-$150,000. Salary ranges are determined by role, level, and location. Within each range, individual pay is based on factors such as job‑related skills, experience, performance, and relevant education or training.

In addition to the base salary, the successful candidate will also receive benefits and a generous equity package.

These ranges may be modified in the future to reflect evolving market conditions and organizational needs. While most offers will typically fall toward the starting point of the range, total compensation will depend on the candidate’s specific qualifications, expertise, and alignment with the role’s requirements.