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Senior Mechanical Engineer

Full-time · Onsite · Greater Boston

We are building entirely new ways to produce complex physical goods. This role is not product maintenance or incremental improvement — you will help architect equipment, tooling, and scalable processes from first principles and bring them from prototype to production.

This is a hands-on, ownership-heavy position working directly with the company founder. The right person enjoys operating with ambiguity, designing quickly, testing aggressively, and solving problems that do not yet have established solutions.

WHAT YOU'LL DO

• Design and develop new mechanical systems

• Build and iterate functional prototypes rapidly

• Create fixtures, tooling, and production hardware

• Translate early concepts into repeatable processes

• Work across materials, motion systems, thermal processes, and production constraints

• Debug failures and improve reliability through testing and analysis

• Participate in supplier selection and manufacturing scale-up

• Help define engineering standards and future team structure

WHAT WE'RE LOOKING FOR

• 5+ years mechanical engineering experience; startup or advanced manufacturing environment strongly preferred

• Demonstrated experience building real hardware that shipped or scaled

• Strong CAD proficiency and tolerance analysis capability

• Experience with mechanisms, motion systems, or automation equipment

• Comfort working in a lab or shop environment and building your own designs

• Ability to move between concept design and hands-on execution

• Practical judgment and bias toward action

PARTICULARLY RELEVANT BACKGROUNDS

• Production equipment design

• Automation or robotics hardware

• Tooling and fixturing

• Additive or novel manufacturing processes

• High-volume consumer goods manufacturing

• Process scale-up from prototype to manufacturing

PERSONAL TRAITS

• Curious and pragmatic

• Comfortable with uncertainty

• Strong ownership mentality

• Collaborative and low ego

• Motivated by building something new

Competitive salary plus meaningful founding-team equity participation.

To apply, send your resume and a brief description of a system, machine, or process you personally designed and built.