Senior Mechanical Engineer
$150,000–$250,000 year
On-siteBillerica, Massachusetts, United States
Job Summary
Principal Systems Engineer at Fabri leads the design, development, and deployment of core manufacturing equipment, owning end-to-end architecture from concept to production. Reports to the CEO, shaping the equipment roadmap, and coordinating with process engineering to translate requirements into mechanical systems. Defines scalable architectures for automation, reliability, maintainability, and future facility scale-out; drives build-vs-buy decisions, prototypes and rapid iteration, and helps recruit and mentor a growing mechanical engineering team. Requires first-principles problem-solving, strong CAD/DFM skills, and experience with SETR or equivalent processes in startup settings. The role emphasizes ownership in designing high-performance machinery for U.S. critical manufacturing sectors and will operate on-site in Boston Metrowest. Fabri does not sponsor visas for this position and requires US nationals or lawful permanent residents.
Required Qualifications
- Bachelor’s degree in Mechanical Engineering, Aerospace Engineering, or a closely related field
- Strong CAD, GD&T and DFM skills
- 5+ Years of designing and building complex equipment or vehicle systems
- Deep first-principles understanding across multiple physics domains, including: Thermodynamics, heat transfer, and fluid mechanics; Mechanics, dynamics, and machine design; Control systems and basic programming; Materials science (metals, polymers, ceramics), fracture mechanics, surface engineering, and wetting
- Strong physics intuition and the habit of questioning assumptions and requirements
- Systems-level thinking with the ability to reason across tightly coupled disciplines
- Excel working in fast-moving startup environments with high ownership and ambiguity
- Strong written and verbal communication skills
- Have direct experience leading structured stage-gated Systems Engineering Technical Review (SETR) or similar processes on accelerated timelines in startup environments.
Desired Qualifications
- Experience designing systems that have to operate at ultra high temperatures, high pressures, high vacuum levels, and/or handle corrosive, molten, or cryogenic fluids
- Background in manufacturing equipment, or alternatively aerospace systems such as propulsion, turbomachinery, vacuum systems, or flight structures
- Experience scaling hardware systems for throughput, reliability, and cost
- Demonstrated ability to move from concept to working hardware quickly
- Experience using meshing and simulation tools to validate equipment designs
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