Principal Machine Learning Engineer

• Drive alignment across teams on ML strategy, standards, and long-term technical direction by serving as a technical leader for Lime's ML Center of Excellence
• Guide recommendations for ML infrastructure, tooling, and architecture (training, serving, feature stores, experimentation, monitoring)
• Define and evolve ML development processes, including model review, experimentation rigor, deployment, optimization, and operations
• Establish best practices for ML monitoring, observability, alerting, and model performance health in production

This role helps build a future where transportation is shared, affordable and carbon-free by developing machine learning systems that improve Lime's electric bikes and scooters, which have powered more than one billion rides in cities around the world.

• 8+ years of professional experience in software engineering or applied ML, with a record of delivering production level systems
• Fluency in Python and experience with modern ML frameworks (e.g., PyTorch, TensorFlow) and data tools (e.g. SQL, pandas, spark, airflow)
• Strong foundation in ML fundamentals, including model evaluation, experimentation, optimization, production deployment, and operations
• Strong system design skills and comfort working with distributed systems

• Comprehensive Health & Wellness: A choice of medical, dental, and vision plans. We also provide company-paid life and disability insurance and company-funded mental health benefits.
• Financial & Retirement Planning: 401(k) plan with both pre-tax and Roth options, and access to a Health Savings Account (HSA) with a monthly company contribution.
• Family & Fertility Support: Paid parental leave for birthing and non-birthing parents, plus fertility and family-forming benefits.
• Paid Time Off: Unlimited vacation, paid leaves, and 10 company holidays.
• Unique Lime Perks: Complimentary use of Lime vehicles in participating cities, a monthly phone allowance, dedicated learning and development days, and access to perks including One Medical, Wellhub, and Headspace.

Lime is the largest global shared micromobility business, operating in close to 30 countries across five continents, on a mission to build a future where transportation is shared, affordable and carbon-free through electric bikes and scooters.