Principal Research Engineer, Post-Training
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Redwood City, CA · Posted November 6, 2026
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Where Redwood City, CA ranks
Where Redwood City, CA placed in our monthly rankings, month by month. Each month stays online at its own address.
November 2026
- #2Best cities for director and executive jobs in the West Coast32% · of 71
- #3Cities with the most hybrid jobs28% · of 100
- #3Cities with the most hybrid jobs in the West Coast28% · of 66
- #8Best all-round cities for remote workers in the West Coast68 / 100 · of 39
- #9Cities that post pay most often44% · of 100
- #10Best cities for entry-level jobs that want AI skills in the West Coast17% · of 54
Rankings about engineering jobs
- Best cities for software and engineering jobs #1 San Francisco (3,412 openings)
- Best cities for engineering pay after cost of living #1 San Mateo ($216k)
- Most requested AI skills in engineering jobs #1 AI tools in daily work (6.1%)
- AI tools named most often in engineering jobs #1 Claude (1.7%)
- Employers with the most engineering jobs #1 Amazon (2,992 roles)
How AI is used in this kind of work
AI use among mechanical engineers is little observed so far. Measured exposure for mechanical engineers: 8% (little observed).
Share of this job’s tasks that AI is already used for at work, from real usage. It is not a forecast of job loss, and a low number means no use seen yet. Source: Anthropic Economic Index.
About the job
About the Role and Team As a Principal Research Engineer on the Post-Training team, you will drive the technical vision, execution, and evolution of the systems that transform foundation models into i