Senior Mechanical Engineer

Lime•San Francisco, CA

13d•$128,000 - $176,000•Hybrid

About The Position

As a global leader in micromobility, Lime is on a mission to build a future where transportation is shared, affordable and carbon-free. A Time Magazine 100 Most Influential Company, Lime has powered more than one billion rides in close to 30 countries across five continents, spurring a new generation of clean alternatives to car ownership. Learn more at li.me. Lime is looking for a Senior Mechanical Engineer to build the future of shared micromobility. This is a unique, hybrid role tailored for a highly analytical engineer who loves both advanced analysis and physical product design— splitting time between advanced CAE and mechanical design. We aren't looking for a pure theorist; we need someone who uses simulation to drive practical design iterations. In this role, you will take ownership of safety-critical assemblies from CAD concept through advanced FEA, partnering with our test engineering teams to correlate your models with real-world physical data. This is a hybrid position that combines remote and onsite work. The incumbent will be required to be onsite at our San Francisco Hardware Development Lab 1+ day each week. Interview Note: We love to see engineering portfolios. Be prepared to walk us through a case study showing a complex structural failure or optimization challenge, your correlation methodology, and the final design solution.

Requirements

MSc in Mechanical Engineering (or a related engineering discipline), or equivalent practical experience.
6+ years of mechanical design and simulation experience, with a proven portfolio that shows design iteration driven by a practical blend of CAD (Solidworks preferred) and CAE (Abaqus preferred).
Capable of executing complex static, dynamic, vibration, fatigue, non-linear and fracture analyses for large assemblies and vehicles.
First-principles hand calculations, structural mechanics, classical beam theory, bolted joint and weldment analysis, free-body diagram development, and FEA model boundary condition validation.
Aluminum metallurgy (6000 series), advanced manufacturing (HPDC casting, forging, extrusion), heat treatment (T4/T6), fatigue & fracture mechanics (S-N Curves, crack propagation), and weldment analysis.

Nice To Haves

Prior engineering experience within the automotive, bicycle, or micromobility-adjacent industries.

Responsibilities

Design, iterate, and structurally optimize vehicle frames, chassis, enclosures, and other safety-critical sub-systems.
Perform CAE to evaluate and optimize vehicle assemblies and sub-systems to provide engineering confidence before releasing parts for tooling.
Actively correlate analytical simulation results with physical testing data from the lab to continuously improve model accuracy and predictive insights.
Partner closely with multi-disciplinary engineering units and external global suppliers to translate concepts into manufacturable, high-reliability components.
Act as the primary technical mentor and go-to resource for the engineering team; guide colleagues in establishing proper simulation setups, troubleshooting complex models, and validating boundary conditions.
Support vehicle builds at our Asian Contract Manufacturers (CMs), which includes international travel approximately 2–3 times per year.