Senior Mechanical Engineer

Senior Mechanical Engineer

Lumia Health

Boston, MA — In-Person

Full-Time

Reports to COO

About Lumia

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. We started by serving deeply underserved communities including people with POTS, ME/CFS, Long COVID, and orthostatic intolerance, and are now expanding into a broader consumer wellness platform without losing the technical depth and scientific rigor that make us different.

Our founding team includes repeat entrepreneurs and ex-Bose engineers. We move fast, care deeply about quality, and believe the best products come from people with taste, ownership, and strong first-person product conviction.

The Opportunity

We have working prototypes. Now we need to get to production, and you will own that journey end to end.

As our Senior Mechanical Engineer, you will take Lumia's mechanical design from current prototypes to mass production. You will identify and resolve design, manufacturing, and reliability risks before they become production problems, and you will do it through rapid prototyping, empirical testing, and clear decision-making rather than prolonged speculation.

You will work directly with the CEO, Hardware, Electrical, User Research, and Manufacturing teams. This is a high-ownership, high-visibility role with a direct line to shipping a product that genuinely helps people.

What success looks like

• Mechanical risks identified, tested, and resolved with data before they reach 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 making steady progress independently without relying on CEO to drive decisions
• Design freeze delivered in Q4 with all high-impact risks resolved or carrying clear mitigation plan

What you will do

• Identify the highest-impact mechanical risks and design minimum viable tests to resolve them quickly
• Build and test with urgency, using empirical results to drive decisions rather than prolonged debate
• Lead DFM in close collaboration with Manufacturing and own tooling readiness and release decisions
• Ensure all key mechanical interfaces are defined and locked before tooling release
• Partner with User Research to validate real-world fit, comfort, durability, and handling across a diverse user population
• Own day-to-day mechanical design decisions and risk prioritisation across the team
• Translate test results into concrete design changes and communicate them clearly across functions

What

we are looking for

• 7 to 12\+ years of mechanical engineering experience with a strong track record in consumer hardware or wearables
• Demonstrated experience taking products from prototype to mass production, including DFM and tooling release
• Experience with small form factor electromechanical assemblies such as wearables, hearables, or similar products
• Hands-on prototyping mindset: you build and test rather than design and delegate
• Comfortable making decisions in ambiguous, fast-moving environments with imperfect data

How you think and work

• Bias to prototyping and testing
• Ruthless prioritisation
• Resourcefulness
• Calibrated judgment
• Attention to detail

You always ask "how do we test that today?" You find a way when conditions are not perfect. You match the level of rigor to the weight of the decision, and you follow work through to completion.

Compensation and benefits

Base salary

$140K – $200K

Equity

$200K – $500K

Both salary and equity ranges depend on experience and individual preference. Full health insurance, 401k, free food Fridays, and weekly pastries included.