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Lime logo
Lime

Building a future where transportation is shared, affordable and carbon-free. Join us! www.li.me/careers

Principal Machine Learning Engineer

Machine Learning EngineerMachine Learning EngineerFull TimeRemoteLeadTeam 501-1,000Since 2017H1B SponsorCompany SiteLinkedIn

Location

United States

Posted

68 days ago

Salary

$240K - $330K / year

Seniority

Lead

Job Description

Principal Machine Learning Engineer

Lime

• 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 • Drive reusable feature development patterns and shared ML capabilities that enable teams to move faster and more safely • Partner with platform, data, and product engineering teams to ensure ML systems are reliable, scalable, and cost effective • Identify and prioritize opportunities where ML will improve Lime’s product, operations, or efficiency • Act as a force multiplier by mentoring data scientists and machine learning engineers, raising the quality bar for machine learning across Lime

Job Requirements

  • 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
  • Track record of influencing ML architecture and practices across multiple teams
  • Background in domains relevant to Lime (e.g., forecasting, optimization, pricing, marketplace dynamics) preferred.
  • Prior experience building a ML platform or center of excellence through defining ML standards, governance, or shared tooling at scale preferred.

Benefits

  • 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.

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