Senior Data Scientist

Zefr
New York, CA
Category Data Analyst
Remote
Job Description
Zefr is hiring a Senior Data Scientist to fine-tune, optimize, and deploy Large Language Models for multimodal social media content understanding. The role requires experience with LLM inference optimization, fluency in Python and SQL, and a strong foundation in data structures, algorithms, and software design.

Requirements

  • Bachelor's or Master's degree in Computer Science or related field
  • 4+ years of professional experience in machine learning or data science
  • Hands-on experience fine-tuning large language models
  • Experience with LLM inference optimization
  • Track record of taking ML models from research to production at scale
  • Fluency with Python and SQL
  • Experience working with multimodal models and features
  • Familiarity with cost/quality tradeoff analysis across LLM providers and self-hosted models
  • Experience with distributed systems and GPU-accelerated workloads
  • Strong foundation in data structures, algorithms, and software design
  • Thorough testing and code review standards/practices
  • Strong verbal and written communication skills
  • Experience working with Autonomous Coding Agents
  • Openness to new technologies and creative solutions

Benefits

  • Flexible PTO
  • Medical, dental, and vision insurance with FSA options
  • Company-paid life insurance
  • Paid parental leave
  • 401(k) with company match
  • Professional development opportunities
  • 13 paid holidays off
  • In-office, hybrid, and fully-remote work options available
  • 'Summer Fridays' (shorter work days on select Fridays during the summertime)
  • In-office lunches and lots of free food
  • Optional in-person and virtual events
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