Senior Mechanical Engineer

Sandbar; New York (NY); On-site; USD 120,000 - 170,000; Full time

Benefits offered by this job

Health, Vision, and Dental benefits

Company-sponsored 401(k)

Unlimited PTO and sick time

Early-stage equity

Job summary

Sandbar in New York City seeks a Senior Mechanical Engineer to own the mechanical design of wearable products from concept through mass production. You will work cross-functionally with Electrical, Firmware, Industrial Design, and Operations, including CM partners, to deliver compact, robust assemblies.

The role suits hands-on engineers who have shipped high-volume consumer electronics and want ownership at an early-stage startup. Travel internationally is expected.

Qualifications

• Bachelor's or Master's degree in Mechanical Engineering or related field.
• 7+ years of mechanical design experience in consumer electronics.
• Shipped at least one high-volume consumer electronics product through EVT → DVT → PVT → MP.
• Strong 3D CAD skills and 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; comfortable in ambiguous, fast-moving environments.
• Must have ability to travel internationally.

Responsibilities

• Define mechanical architecture of new products.
• Own mechanical design of key parts from concept through mass production.
• Build and test prototypes quickly and use results for design decisions.
• Package electronics into a small wearable form factor with PCBs, batteries, antennas, sensors, and haptics.
• Design parts for high-volume manufacturing (injection molding, insert/overmolding, CNC, MIM, stamping).
• Release production-ready 3D CAD and 2D drawings with GD&T and run tolerance stack-ups.
• Drive manufacturing/assembly with contract manufacturers and suppliers.
• Plan and run mechanical validation and reliability testing; lead root cause analysis.
• Balance comfort, fit, durability, and cosmetics with Industrial Design.
• Support engineering builds at manufacturing partners, including on-site factory support.
• Document designs and decisions clearly; shape how hardware team works.

Skills

Mechanical design

Consumer electronics

3D CAD (OnShape/Creo/SolidWorks)

DFM/DFA

Tolerance analysis

Contract manufacturers coordination

Travel internationally

Education

Bachelor's or Master's in Mechanical Engineering

Tools

OnShape

Creo

SolidWorks

Job description

About Sandbar

Sandbar is an interface company in New York City. We aim to augment individuals so we can each think, act, and move more freely. Our team has built SW, ML, and HW products across Meta, CTRL-labs, Google, Apple, Fitbit, Peloton, and Equinox.

Our first product, Stream, is a self extension—a private voice ring and conversational interface. Stream has been featured in WSJ, Bloomberg, & Wired, and begins shipping in Summer '26.

Join us in creating technology that extends human thinking.

About

We're looking for a Senior Mechanical Engineer to own the mechanical design of our wearable products.. You'll take parts and assemblies from concept through prototyping, EVT/DVT/PVT, and into mass production. You'll work closely with our Electrical, Firmware, Industrial Design, Quality, and Operations teams, as well as our contract manufacturers and suppliers.

This role is perfect for a hands-on engineer who has shipped high-volume consumer electronics, loves the challenge of packing a lot into a very small space, and wants real ownership at an early-stage company.

Responsibilities

• Define 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 fast; use the 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 (e.g., injection molding, insert/overmolding, CNC, MIM, stamping)

• Release production-ready 3D CAD and 2D drawings with GD&T; 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 (drop, tumble, ingress/water resistance, wear, fatigue, sweat/chemical exposure); lead root cause analysis

• Balance comfort, fit, durability, and cosmetics with Industrial Design for a product people wear all day

• Support engineering builds at our manufacturing partners, including on-site factory support

• Document designs and decisions clearly, and help shape how our hardware team works

Qualifications

• 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 → MP

• Strong 3D CAD skills (e.g., OnShape, Creo, or SolidWorks) and 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; comfortable in ambiguous, fast-moving environments

• Must have ability to travel internationally

Nice to Have

• Experience shipping wearables (rings, watches, earbuds, fitness trackers, or similar)

• 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 (e.g., PVD, anodizing, polishing, coatings)

• Experience at an early-stage startup

FTE Benefits

• Health, vision, and dental benefits

• Company-sponsored 401(k)

• Unlimited PTO and sick time

• Early stage equity