Principal Machine Learning Engineer jobs in 2026 — required skills, demand trends, and top hiring cities
As of 2026-10-07, Skillenai has indexed 3 job postings with the title “Principal Machine Learning Engineer” over the past 90 days. The skill mentioned most often is Machine Learning.
Last updated · 90d ending 2026-10-07
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Frequently asked questions about Principal Machine Learning Engineer jobs
+How many Principal Machine Learning Engineer jobs are being posted in 2026?
Skillenai has indexed 3 job postings with the title “Principal Machine Learning Engineer” over the 90 days ending 2026-10-07.
+What skills do Principal Machine Learning Engineer jobs require?
Across Principal Machine Learning Engineer postings indexed by Skillenai over the 90 days ending 2026-10-07, the skills mentioned most often are Machine Learning, model serving, Trust, Retrieval, embedding.
+Which cities are hiring the most Principal Machine Learning Engineer?
As of 2026-10-07, Principal Machine Learning Engineer postings indexed by Skillenai are concentrated in Bucharest, San Francisco.
+Is Principal Machine Learning Engineer a good career path right now?
Skillenai indexes 3 Principal Machine Learning Engineer postings over the 90 days ending 2026-10-07. The skill mentioned most often in Principal Machine Learning Engineer postings is Machine Learning, so building it gives the strongest signal that an applicant matches the role.
+How can I track new Principal Machine Learning Engineer job postings as they’re indexed?
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+What roles do people move into and out of Principal Machine Learning Engineer?
The career-flow chart shows roles before and after observed employer changes across all locations. Counts are moves, not distinct people or promotion probabilities. Same-role moves to another employer are included. The incoming and outgoing sides are separate groups of observations, not a matched three-stage journey.
Weekly indexed Principal Machine Learning Engineer postings — last 90 days
Career paths through Principal Machine Learning Engineer
Different-role employer moves. Each side is scaled independently.
Historical career profiles · all locations
Roles before Principal Machine Learning Engineer
No published incoming different-role moves yet.
Roles after Principal Machine Learning Engineer
How to read this chart · view counts
Each side is an independent set of observed employer moves, not the same people followed through three stages. Ribbon widths compare move counts within that side. Internal moves are not included.
Same role means a change of employer while keeping the same role. Counts are moves, not distinct people, promotions, or your chances of making a particular move.
Source: Skillenai talent graph, historical career profiles. Historical descriptions and coverage can change. Only the leading published connections are shown.
| Connection | Moves |
|---|---|
| After: AI Consultant | 1 |
| After: Principal Software Development Engineer | 1 |
Skills most often required for Principal Machine Learning Engineer
| Name | Postings | Share |
|---|---|---|
| Machine Learning | 2 | 66.7% |
| model serving | 1 | 33.3% |
| Trust | 1 | 33.3% |
| Retrieval | 1 | 33.3% |
| embedding | 1 | 33.3% |
| Python | 1 | 33.3% |
| platform architecture | 1 | 33.3% |
| AWS Lambda | 1 | 33.3% |
| data ingestion | 1 | 33.3% |
| context management | 1 | 33.3% |
| AWS SageMaker | 1 | 33.3% |
| model evaluation | 1 | 33.3% |
| LLM infrastructure | 1 | 33.3% |
| lifecycle management | 1 | 33.3% |
| LLMs | 1 | 33.3% |
Top companies posting Principal Machine Learning Engineer jobs
Employers ranked by indexed job postings in the last 90 days.
| Company | Postings · 90 days |
|---|---|
| Toast | 1 |
| ArcadeDB | 1 |
| Frame.io | 1 |
Job postings indexed over the past 90 days, grouped by resolved employer. Counts are postings, not hires. Companies without a published page appear without a link.
Top metros hiring Principal Machine Learning Engineer
| Name | Postings | Share |
|---|---|---|
| Bucharest | 1 | 33.3% |
| San Francisco | 1 | 33.3% |
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How this was computed
Counts derive from the Skillenai jobs index over the 90 days ending 2026-10-07, matching postings whose canonical role is “Principal Machine Learning Engineer”. Pages refresh weekly (or daily for the top-50 most-posted roles). An adjusted trend is not shown because comparable posting coverage is insufficient.
- role
- Principal Machine Learning Engineer
- source
- Skillenai jobs index, deduplicated daily
- data_as_of
- 2026-10-07
- window_days
- 90
The demand, skills, and geo numbers on this page come from the same Skillenai labor market index that powers our API. Use it for compensation benchmarking, hiring-competition analysis, and skill-adoption tracking.
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