Open Generative AI & RLHF positions from companies hiring on OpenTrain AI. Every job is remote. Apply with a free OpenTrain account.
Evaluate AI-written business email replies for relevance, accuracy, personalization, and professionalism. Remote, entry-level contract work (20+ hrs/week) reviewing multiple model outputs and writing clear evaluation feedback to improve AI behavior.
Posted Jul 25, 2026
OpenTrain is hiring US-based Business Account Raters to evaluate AI-generated replies using your corporate Gmail—judging personalization, relevance, and usefulness. Contract role (3–4 months) with flexible weekly hours and required PST overlap.
Posted Jul 25, 2026
Review AI-generated email replies that use business Gmail history and rate them for relevance, personalization, and helpfulness. Contractor role for US-based native speakers of Spanish, Italian, Portuguese, German, Japanese, Korean, or French; flexible hours for a 3–4 month engagement.
Posted Jul 25, 2026
Assess AI-generated reproductions of published ML papers: read papers, inspect code/data/output artifacts, rank reproduction attempts, and provide clear written evaluations. Remote, contractor role for experienced ML researchers — 20+ hrs/week.
Posted Jul 25, 2026
Join OpenTrain as a remote Clinical Medicine AI Evaluation Physician to design and run clinical evaluations that test AI medical reasoning. Flexible contract work (20–30 hrs/week), 1-month engagement with possible extensions; licensed physicians only.
Posted Jul 25, 2026
Join OpenTrain as a contractor to design adversarial red-team workflows, test SaaS/cloud environments, and evaluate security controls for AI training; remote, flexible, 20+ hrs/week, paid $60–$100/hr.
Posted Jul 25, 2026
Join OpenTrain AI as a Science Reasoning Expert to author and review high-difficulty cross-disciplinary STEM problems and evaluate AI-generated solutions with detailed written rationale. Remote contractor role, 20+ hrs/week at $75/hr for expert-level candidates.
Posted Jul 25, 2026
OpenTrain AI is hiring PhD-level plasma and fusion experts to author and review expert scientific problems and evaluate AI-generated solutions with rigorous Accept/Revise/Reject judgments. Contract, remote role: 20+ hrs/week at $75/hr.
Posted Jul 25, 2026
OpenTrain AI is hiring an expert in Lean 4 and formal verification to author hard theorem-proving problems and evaluate AI-generated proofs; contractor, 20+ hrs/week at $95/hr, fully remote and worldwide (English).
Posted Jul 25, 2026
Join OpenTrain as a DNA Nanotechnology Expert to author and review advanced structural DNA problems and evaluate AI-generated solutions; part-time contractors work 20+ hours/week at $75/hr, fully remote.
Posted Jul 25, 2026
Evaluate JSON-formatted AI model outputs against written task instructions and scoring rubrics in a short-term, US-only remote project; pay ranges $50–$175/hr with a default 40-hour weekly commitment and 20+ hours/week availability required.
Posted Jul 25, 2026
Join OpenTrain AI as a Machine Learning Engineer to design and run evaluation benchmarks for frontier LLMs. Contract, part-time role (20+ hrs/week) paying $60–$90/hr for US-based practitioners with hands-on ML training and research experience.
Posted Jul 25, 2026
Remote, part-time contract for FP&A and treasury professionals to create and review finance training data for AI. US-based, 20+ hrs/week, $80–$120/hr; you'll build realistic budgets, cash forecasts, and evaluate AI outputs for accuracy and judgment.
Posted Jul 25, 2026
OpenTrain AI seeks U.S.-based elementary school teachers for a paid remote study ($30/hr) about day-to-day classroom work; participants must have 4+ years classroom experience and recent (within 12 months) elementary teaching. Remote, contractor, part-time role.
Posted Jul 24, 2026
Design and solve multi-step physics problems and write clear step-by-step solutions that probe large language model reasoning. Fully remote contractor role (20+ hrs/week) requiring advanced physics knowledge, scientific Python skills, and a 3-week commitment with PST overlap.
Posted Jul 24, 2026
Remote contractor role evaluating personalization in a conversational AI using your own account data; work in Russian, 20+ hrs/week at $15/hr. Create multi-turn prompts, compare responses side-by-side, and write clear rationales while following strict data hygiene.
Posted Jul 24, 2026
Join OpenTrain as a US-based, licensed architect to evaluate and improve AI-generated architecture content — flexible remote contractor work paying $65–$90/hr. Use your professional experience with codes and BIM tools to rate responses, give corrections, and guide model reasoning.
Posted Jul 23, 2026
OpenTrain AI is hiring a licensed US electrical engineer to review and rate written content and AI-generated responses for technical accuracy. Flexible, remote contract work ~10 hours/week at $65–$90/hr for subject-matter experts with a PE license and 2+ years' experience.
Posted Jul 23, 2026
Join OpenTrain as a remote, part-time Chemical Engineering AI Expert to evaluate technical written content and AI responses; must hold a US PE license and 2+ years' experience. Competitive pay: $65–$90/hr; expected part-time commitment of 20+ hours/week.
Posted Jul 23, 2026
Short contract for a bilingual (German/English) reviewer to label and create analytical text scenarios that improve LLM reasoning. One-week, 40 hrs/week remote role with required daily overlap to UTC-8; immediate start.
Posted Jul 22, 2026
Join OpenTrain AI to review, label, and evaluate text that helps fine-tune large language models; this remote, short-term contract requires English and Spanish fluency, strong analytical judgment, and attention to annotation quality.
Posted Jul 22, 2026
Join OpenTrain to build and evaluate RL training environments that teach AI systems how to operate cloud infrastructure. Remote contractor role, worldwide, 20+ hrs/week (see schedule), paying $60–$130/hr with estimated project earnings of $9,600–$20,800.
Posted Jul 22, 2026
Join OpenTrain AI to design realistic procurement simulations, write rubrics and golden responses, and benchmark vendor intake and contract scenarios for AI model evaluation. Senior procurement professionals: 20+ hrs/week, $70–$100/hr, remote, English required.
Posted Jul 22, 2026
Join OpenTrain AI to author and validate security-review training tasks: evaluate SOC 2 reports, pen-test evidence, and vendor questionnaires, write rubric-style judgments and golden responses, and assess sub-processor and data-handling risk. Remote contract, 20+ hrs/week at $90–$110/hr.
Posted Jul 22, 2026
Review AI-generated legal research for accuracy, citations, and good-law status in a US-based, contract role. Part-time (20+ hrs/week) work paying $75–$150/hr for experienced legal researchers with Westlaw/KeyCite and J.D. or MLIS credentials.
Posted Jul 22, 2026
Join OpenTrain AI to design rigorous, reproducible scientific-reasoning datasets that evaluate and improve LLMs. 8-week remote contractor role at 20+ hrs/week requiring 3+ years of physics experience and strong quantitative modeling skills.
Posted Jul 21, 2026
Apply advanced neuroscience expertise to annotate, review, and author neuroscience research, case studies, and scenario-based materials used to train generative AI — remote contract, part-time (20+ hrs/week), $60–$80/hr. Prior AI training experience not required.
Posted Jul 21, 2026
OpenTrain AI seeks an advanced-degree molecular biologist to review protocols, create annotations, and evaluate AI-generated scientific outputs. This remote, contract role is 20+ hours/week and pays $60–$80/hr for high-quality, evidence-based work.
Posted Jul 21, 2026
Join OpenTrain to design accounting scenarios, evaluate AI-generated accounting outputs for GAAP/IFRS compliance, and provide structured feedback that improves model reasoning — 20+ hrs/week, US-based contractors, $80–$120/hr; requires 3+ years and a professional accounting credential.
Posted Jul 21, 2026
Join OpenTrain as a Lightworks post-production expert reviewing AI-generated guidance for advanced editing workflows. Remote, contract, part-time (20+ hrs/week), paid $50–$100 USD per hour to help improve how AI understands real Lightworks workflows.
Posted Jul 21, 2026
