Senior Mechanical Engineer
About The Position
Sandbar is an interface company in New York City aiming to augment individuals so they can think, act, and move more freely. Its first product, Stream, is a private voice ring and conversational interface that begins shipping in Summer '26. Sandbar is looking for a Senior Mechanical Engineer to own the mechanical design of wearable products, taking parts and assemblies from concept through prototyping, EVT/DVT/PVT, and mass production. The engineer will work closely with Electrical, Firmware, Industrial Design, Quality, and Operations teams, as well as contract manufacturers and suppliers. This hands-on role is suited to an engineer with experience shipping high-volume consumer electronics who enjoys compact product design and wants ownership at an early-stage company.
Requirements
- Bachelor's or Master's degree in Mechanical Engineering or a related field.
- 7+ years of mechanical design experience in consumer electronics.
- Shipped at least one high-volume consumer electronics product through EVT, DVT, PVT, and mass production.
- Strong 3D CAD skills, such as OnShape, Creo, or SolidWorks, and ability to create 2D drawings with GD&T.
- Hands-on experience with tolerance analysis, DFM/DFA, and plastic and metal part design.
- Solid knowledge of materials and high-volume manufacturing processes.
- Experience working directly with contract manufacturers and suppliers.
- Clear written and verbal communication skills and comfort working in ambiguous, fast-moving environments.
- Ability to travel internationally.
Nice To Haves
- Experience shipping wearables such as rings, watches, earbuds, fitness trackers, or similar products.
- Experience with miniaturized assemblies, waterproofing, and small-battery or wireless-charging integration.
- Experience designing for human factors, fit, and comfort across a range of body sizes.
- Experience with highly cosmetic parts and surface finishes such as PVD, anodizing, polishing, and coatings.
- Experience at an early-stage startup.
Responsibilities
- Define the mechanical architecture of new products.
- Own the mechanical design of key parts, subsystems, and full product assemblies from concept through mass production.
- Build and test prototypes quickly and use results to make clear design decisions.
- Package electronics into a small wearable form factor, including PCBs, flexes, batteries, antennas, sensors, microphones, and haptics.
- Design plastic, metal, and elastomer parts for high-volume manufacturing, including injection molding, insert/overmolding, CNC, MIM, and stamping.
- Release production-ready 3D CAD and 2D drawings with GD&T, and run tolerance stack-ups.
- Drive design for manufacturing and assembly (DFM/DFA) with contract manufacturers and part suppliers.
- Plan and run mechanical validation and reliability testing, including drop, tumble, ingress/water resistance, wear, fatigue, and sweat/chemical exposure; lead root cause analysis.
- Balance comfort, fit, durability, and cosmetics with Industrial Design for products worn all day.
- Support engineering builds at manufacturing partners, including on-site factory support.
- Document designs and decisions clearly and help shape how the hardware team works.
Benefits
- Health, vision, and dental benefits.
- Company-sponsored 401(k).
- Unlimited PTO and sick time.
- Early-stage equity.
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What This Job Offers
Job Type
Full-time
Career Level
Senior
