Sr. Machine Learning Engineer I

1 day ago
Full-time
Senior
Software Development
HubSpot

HubSpot

HubSpot provides a comprehensive cloud-based CRM platform that integrates marketing, sales, service, and operations tools to help businesses attract, engage, and delight customers effectively.

Media
5K-10K
Founded 2006

Description

  • Design and run experiments to improve agent quality, including tool use, reasoning, and output quality.
  • Build and maintain evaluation infrastructure to measure performance and catch regressions before customers are affected.
  • Optimize LLM inference across latency, cost, model routing, and quality tradeoffs.
  • Partner with product teams on model selection and performance benchmarking.
  • Work with product engineers and PMs to turn customer quality issues into ML hypotheses and solutions.
  • Own models end to end from research and experimentation through production deployment.
  • Work directly with LLM vendors such as OpenAI to support model development and improvement.

Requirements

  • 5+ years of experience in a dedicated Machine Learning Engineer role, not ML-adjacent software engineering.
  • Strong Python skills.
  • Experience with PyTorch, VLLM, DSPy, or similar LLM optimization frameworks.
  • Hands-on production experience with large language models, including prompt engineering, fine-tuning, evaluation, and inference optimization.
  • Ability to move from an ambiguous performance problem to experimental design and shipped improvement.
  • Comfort working with limited supervision in an early-stage product environment.

Benefits

  • Annual cash compensation range of $165,500 to $248,300 USD.
  • Cash compensation may include base salary, on-target commission for eligible roles, and annual bonus targets.
  • Some roles are eligible for equity participation through restricted stock units (RSUs).
  • Flexible remote-or-office work environment with support for in-person onboarding and team connection events.
  • Benefits and perks package available to support employee growth and well-being.
  • Accommodations and assistance available for candidates with disabilities or travel limitations.

Interested in this position?

Apply directly on the company website

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