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# Staff Machine Learning Engineer

- **Company:** PRIMER
- **Location:** San Francisco, CA, United States (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Data Structures, Graph Database, Information Retrieval, Python (Programming Language), Machine Learning, Pytorch, Large Language Models, Multi-Agent Systems, Backend, Information Technology
- **Published:** August 3, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=1a65c7fde0fc4f72

## About the Role

* BS, MS, or PhD in computer science, a related field, or equivalent practical experience.
 * 6+ years building production backend software, with a track record of shipping and operating ML-driven functionality.
 * Mastery of data structures and algorithms, and the judgment to translate user needs into practical solutions.
 * Hands-on depth with LLMs and agentic systems (prompt and context engineering, tool use, retrieval and RAG) and the broader ML toolkit such as PyTorch, plus experience defining evals to measure and improve quality.
 * Fluency authoring production APIs in Python (Rust a plus).
 * High agency and a bias to action in ambiguous, fast-moving problems, plus the curiosity, generosity, and love of teaching that lifts a whole team.

Bonus Points

 * Experience with knowledge graphs, information retrieval at scale, or LLM fine-tuning and post-training.
 * A pull toward high-stakes, real-world problems where the work actually ships and someone depends on the answer.

Primer works closely with the U.S. defense and intelligence establishment. Any offer of employment is conditioned on an applicant or employee being able to meet any applicable government contract requirements. The company may rescind any offer of employment to an applicant or terminate an employee if the applicant or employee is unable to perform the functions of the position in compliance with applicable government contracts or if an applicant or employee makes a false attestation of compliance.



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