Senior Mechanical Engineer
Posted on April 24, 2026 (about 1 month ago)
Senior Mechanical Engineer
Location: Boston, MA — In-Person. Full-Time. Reports to COO.
Lumia is building the next evolution in wearable health technology: smart earrings that translate complex physiological signals into clear, actionable insights. We sit at the intersection of hardware, software, machine learning, and physiology.
About Lumia
We began by serving underserved communities (POTS, ME/CFS, Long COVID, orthostatic intolerance) and are expanding into a broader consumer wellness platform while maintaining technical depth and scientific rigor. The founding team includes repeat entrepreneurs and ex-Bose engineers; we move fast and care deeply about quality.
The Opportunity
We have working prototypes and need to move to production. As Senior Mechanical Engineer you will own the mechanical design journey end-to-end: identify and resolve design, manufacturing, and reliability risks through rapid prototyping, empirical testing, and decisive actions.
You will work directly with the CEO and cross-functional teams (Hardware, Electrical, User Research, Manufacturing). This is a high-ownership, high-visibility role with direct impact on shipping product.
What success looks like
- Mechanical risks identified, tested, and resolved with data before production
- DFM completed and tooling released on schedule with clear confidence in performance, yield, and cost
- Fit, comfort, and durability validated through real-world testing across a diverse user population
- Mechanical team able to make steady independent progress
- Design freeze delivered in Q4 with high-impact risks resolved or mitigated
Responsibilities
- Identify highest-impact mechanical risks and design minimum viable tests to resolve them quickly
- Build and test rapidly; use empirical results to drive decisions
- Lead DFM with Manufacturing and own tooling readiness and release decisions
- Ensure key mechanical interfaces are defined and locked before tooling release
- Partner with User Research to validate fit, comfort, durability, and handling
- Own day-to-day mechanical design decisions and risk prioritization
- Translate test results into concrete design changes and communicate across functions
Requirements
- 7–12+ years mechanical engineering experience with consumer hardware or wearables
- Proven experience taking products from prototype to mass production, including DFM and tooling release
- Experience with small form-factor electromechanical assemblies (wearables, hearables, or similar)
- Hands-on prototyping mindset — you build and test rather than only delegating
- Comfortable making decisions in ambiguous, fast-moving environments with imperfect data
How we think and work
- Bias to prototyping and testing
- Ruthless prioritization
- Resourcefulness
- Calibrated judgment
- Attention to detail
Compensation and benefits
Base salary: $140,000 – $200,000 per year. Equity: $200,000 – $500,000. Both ranges depend on experience and preference. Benefits include full health insurance, 401(k), free food Fridays, and weekly pastries.
How to apply
Click the Apply button on the LinkedIn job page (sign in may be required) to submit your application.
Recruiter
You can also direct message the job poster: Craig McElroy, Head of Talent at Lumia. Alternatively, apply via the Apply button on this LinkedIn job post.