XOR finds, vets, and manages world-class ML, RL, and AI engineers for companies pushing the frontier. You direct the work. We handle everything else.
Aurora
XOR AI Assistant
We need 2 RL engineers with RLHF experience, Pacific time overlap.
Got it. I've screened 40 candidates from the network matching that profile. Your recruiter is curating the shortlist now and will send you the best available-for-immediate-start matches within 48 hours.
Trusted by high-growth AI teams and research labs. Curated from the OpenDataScience community of 0+ professionals.
65,000+ ML, RL, and AI engineers sourced from OpenDataScience and vetted before they ever reach a client.
Submit a brief through the platform. Aurora and your assigned recruiter build a shortlist of verified engineers in 72 hours.
Contracts, payroll, time tracking, compliance, and IP protection. All handled through the platform.
Built by veterans of the recruiting and HR technology industry.
ML Engineers (LLM)
Training, fine-tuning, alignment, and deployment.
ML Engineers (Computer Vision)
Detection, segmentation, generative models.
RL Engineers
Environment design, reward modeling, RLHF, policy optimization.
Low-Level & Kernel Optimization
Kernel inference optimization, CUDA, compiler-level performance.
AI Researchers
Novel architectures, paper-to-production.
Data & ML Infrastructure
Distributed training, pipelines, MLOps.
Single engineers or full teams. Scale up or down as your needs change. All senior. All verified. All managed by XOR. $110 to $160/hr.
We work with select AI companies. Once you're in, you get access to the XOR platform, your assigned recruiter, and Aurora.
Describe what you need through the platform. Aurora takes it from there and your recruiter builds the shortlist. Every engineer is ID-verified and liveness-checked.
Engineers start within days. The platform handles time tracking and reporting. XOR manages contracts, payroll, and compliance. Scale from one engineer to a full team, and scale back down when the project shifts. Rates from $110 to $160/hr depending on seniority and specialization.
Aurora is XOR's AI recruiting assistant, built into the platform from the ground up. She takes your brief, surfaces shortlists, tracks your team's hours, and answers questions about your contractors in real time.
For candidates, she reads every CV before asking a question and guides engineers through onboarding. When something needs a human, she brings in your assigned recruiter seamlessly. Aurora is how the platform stays fast and personal as the network grows.
Aurora
XOR AI Assistant
How many hours did the team log last week?
Across 12 contractors, your team logged 483 hours last week. Here's the detailed breakdown by person.
The top RL researchers and ML engineers were trained in Moscow, Beijing, Warsaw, and Zurich. Today they live and work across Europe, North America, Asia-Pacific, and beyond. XOR gives you the infrastructure to manage them across borders, timezones, and jurisdictions: contracts, compliance, payroll, time tracking, IP protection, and a dedicated recruiter who knows your team by name.
It has been a pleasure working with XOR. The team is very hands-on and responsive, and the quality of the candidates has been consistently strong.
Ning Cao
Co-founder, Stealth AI startup
XOR places senior ML, RL, and AI engineers with vetted companies doing real research and production AI. No ghost jobs. No unverified clients. Our onboarding is fast, our contracts are clean, and a human recruiter is always one message away.