Scale AI Human Frontier Collective
Scale AI's invite-style network for PhD-level and senior experts (separate from Outlier).
Last reviewed 2026-10-14
Pay
Research Advisor $300/hr; coding and ML fellow pay not posted
Who can join
PhD-level or senior experts with work authorization in the US, UK or Canada; no visa sponsorship
How you get in
Apply, challenge task, interview, then invitation; 90-day wait to reapply
Payouts
1099 contractor; method and schedule not published
Watch out
No rate until matched to a project; Meta owns 49%; worker lawsuits against Scale
What it is
- Official
The HFC is Scale AI's expert network for researchers, academics and domain experts. Scale announced it on November 20, 2025, saying more than 80% of members hold STEM PhDs.
scale.com· checked 2026-10-14 - Official
The HFC site now lists 92% doctorates, 88% published members, 65% from top-20 universities and 70+ disciplines. It gives no total member count.
hfc.scale.com· checked 2026-10-14 - Official
Three stated pillars: the network itself (newsletters, roundtables, events), paid AI/ML projects with Scale "and its affiliated lab and platform", and co-authoring research (named papers include SciPredict, PropensityBench and Professional Reasoning Benchmark).
job-boards.greenhouse.io· checked 2026-10-14 - News
Meta stake: in June 2025 Meta invested $14.3B for a 49% stake in Scale, and founder Alexandr Wang left to join Meta. Jason Droege became CEO. Scale said Meta has no voting power.
nbcchicago.com· checked 2026-10-14
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Voting control is reported differently: Newcomer reported Meta would transfer its voting rights to Wang.
newcomer.co· checked 2026-10-14- News
Customer changes: after the deal, OpenAI said it was winding down work with Scale (saying the decision predated the deal), and Reuters reported Google was cutting ties.
nbcsandiego.com· checked 2026-10-14 - Official
Live HFC postings on 2026-10-14: 16 on Scale's Greenhouse board (Finance, Legal, Medical, STEM, SWE and Machine Learning Fellows plus Research Advisors), in the US, UK and Canada.
boards-api.greenhouse.io· checked 2026-10-14
Coding work
- Official
SWE Fellow (US, UK, Canada): design complex, domain-specific problems and datasets to evaluate AI models and give expert feedback on accuracy and reasoning. Requires 5+ years of software engineering (or a CS PhD, postdoc or faculty role) and deep expertise in one or more of Python, Java, Rust, Swift, JavaScript or C++. 1099 independent contractor, fully remote, estimated six months with possible extension, flexible 10 to 40 hours a week. No pay figure is posted: "Project pay rates vary across platforms".
job-boards.greenhouse.io· checked 2026-10-14 - Official
Machine Learning Fellow (US, UK, Canada): design, review and optimize PyTorch models, evaluate ML code and AI-generated implementations, build RL environments and design experiments. Requires a PhD or postdoc in ML or CS, or senior industry ML experience, plus strong Python and PyTorch or TensorFlow. 1099 contractor, no fixed end date, no minimum commitment; "most fellows spend 10–25 hours per week". Pay is given only on project matching.
job-boards.greenhouse.io· checked 2026-10-14 - Official
Research Advisor (finance, legal, medical): $300/hr USD "across all three domains", about 5 to 20 hours a week, part-time contract. Work includes advisory input on model behavior, designing evaluation tasks, client meetings and co-authoring research. Targets senior practitioners (for example V100 law-firm partners, board-certified MDs with 5+ years post-residency, senior IB/PE/VC staff).
job-boards.greenhouse.io· checked 2026-10-14 - Official
Finance, Legal, Medical and STEM Fellows: design hard domain problems and evaluate model outputs. 1099, remote, about six months with possible extension. No pay on the live postings.
- Official
Opportunity categories on the HFC site: Research Advisor, Medical, Math, Computer Science & ML, Physics, Chemistry, Law and Biology.
hfc.scale.com· checked 2026-10-14
Eligibility
- Official
Countries: live postings are for the US, UK and Canada. Fellows must have, or independently obtain, work authorization in their country of residence.
- Official
Visas: "We do not sponsor visas for Fellows." The US SWE posting says sponsorship is not available.
- Official
Credentials: Fellows: PhD, postdoc, faculty or senior industry experience in the field (SWE: 5+ years). Research Advisors: 5+ years of top-tier practice plus a bachelor's, master's, PhD, MD/DO or JD.
- Official
Reapplying: a 90-day wait before Scale reconsiders a candidate for the same role.
job-boards.greenhouse.io· checked 2026-10-14
How to get in (format only)
- Official
Steps on the HFC site: (1) apply; (2) complete a challenge; (3) interview; (4) join the Collective. Applications are reviewed on a rolling basis.
hfc.scale.com· checked 2026-10-14 - Official
Steps on Greenhouse postings: apply, interview (research experience, background and mission alignment), then an invitation to join. The ML posting says directly invited candidates are told whether the interview applies to them. Research Advisors meet Scale's research team.
Minor conflict: the HFC site includes a "Complete a Challenge" step that the Greenhouse SWE and ML postings do not list.
hfc.scale.com· checked 2026-10-14- Official
After joining: fellows are "regularly" matched to projects and get pay details with each project notification; there is no minimum commitment.
job-boards.greenhouse.io· checked 2026-10-14
Pay and payments
- Official
Posted rates: only the Research Advisor postings list a rate ($300/hr). Fellow postings say rates vary by project, scope, skillset and location.
- Official
Tax status: 1099 independent contractor (US postings).
job-boards.greenhouse.io· checked 2026-10-14 - Official
Payout method and schedule: not published for HFC. No official HFC payment page was found.
hfc.scale.com· checked 2026-10-14
Work availability
- Official
Official position: no minimum commitment; fellows choose which projects to take. Duration is "no fixed end date" (ML) or "estimated six months" with possible extension (SWE and others).
- News
Scale restructuring (July 2025): Scale cut about 14% of full-time staff (about 200 people) and stopped using 500 contractors, and regrouped its generative-AI work into five pods: code, languages, experts, experimental and audio. The interim CEO said Scale had "ramped up our GenAI capacity too quickly".
techrepublic.com· checked 2026-10-14 - Official
No public data on how often HFC fellows are matched to projects was found; the HFC site says only that fellows are invited to "selectively vetted" projects.
hfc.scale.com· checked 2026-10-14
Risks and controversies
- News
Ownership and client mix: Meta owns 49% of Scale. OpenAI and reportedly Google pulled back after the deal, which can change which labs' projects are available.
nbcsandiego.com· checked 2026-10-14 - News
Worker lawsuits (mostly about Outlier and Remotasks contractors): a January 17, 2025 class action in N.D. Cal. alleges psychological harm to Outlier contributors who wrote disturbing prompts; it was the third worker suit against Scale in about a month, alongside wage and misclassification claims. Scale disputes the allegations.
- News
Trade-secret dispute: Scale sued rival Mercor and a former employee in September 2025. A company dispute, not a worker issue.
techcrunch.com· checked 2026-10-14 - Official
Contractor status: HFC fellows are 1099 contractors with no benefits stated.
job-boards.greenhouse.io· checked 2026-10-14 - Official
No posted rate for most roles: fellows learn pay only when matched to a project.
job-boards.greenhouse.io· checked 2026-10-14
Referral program
- Official
No paid referral program found. The HFC site says members can refer people "directly through any open role" and mentions no bonus.
hfc.scale.com· checked 2026-10-14
Worker sentiment (reports, not verified)
No first-hand HFC fellow reviews were found on Reddit, Glassdoor or Trustpilot as of 2026-10-14; public material is Scale's own postings and job-aggregator copies.
hfc.scale.com· checked 2026-10-14- News
Scale-wide context: Outlier and Remotasks reviews and press coverage focus on pay disputes and abrupt project changes; see the separate Outlier notes.
inc.com· checked 2026-10-14
Quick answers
- How much does Scale AI Human Frontier Collective pay?
- Research Advisor $300/hr; coding and ML fellow pay not posted
- Who can join Scale AI Human Frontier Collective?
- PhD-level or senior experts with work authorization in the US, UK or Canada; no visa sponsorship
- How do you get into Scale AI Human Frontier Collective?
- Apply, challenge task, interview, then invitation; 90-day wait to reapply
- How and when does Scale AI Human Frontier Collective pay out?
- 1099 contractor; method and schedule not published
- What should you watch out for at Scale AI Human Frontier Collective?
- No rate until matched to a project; Meta owns 49%; worker lawsuits against Scale