Applied Research - Forward-Deployed Be Your Own LabPrime Intellect builds the infrastructure that frontier AI labs build internally, and makes it available to everyone. Our platform, Lab, unifies environments, evaluations, sandboxes, and high-performance training into a single full-stack system for post-training at frontier scale, from RL and SFT to tool use, agent workflows, and deployment. We validate everything by using it ourselves, training open state-of-the-art models on the same stack we put in your hands. We're looking for people who want to build at the intersection of frontier research and real infrastructure. We recently raised $15mm in funding (total of $20mm raised) led by Founders Fund, with participation from Menlo Ventures and prominent angels including Andrej Karpathy (Eureka AI, Tesla, OpenAI), Tri Dao (Chief Scientific Officer of Together AI), Dylan Patel (SemiAnalysis), Clem Delangue (Huggingface), Emad Mostaque (Stability AI) and many others.About the RoleWe're looking for a Forward-Deployed Research Engineer (FDRE) to serve as the primary technical interface between Prime Intellect and our most important customers: AI companies, research labs, and enterprises running post-training and agentic RL on our platform.This is not a traditional research role. You'll spend most of your time embedded with customers, understanding their models, workflows, and goals. Then, you'll translate those objectives into concrete training runs, environment designs, evaluation harnesses, and deployment recipes using the Lab stack. You are the person who makes the platform work in practice for real workloads.You'll work closely with our research, product, and infrastructure teams to feed field insights back into the platform, shaping what we build next based on what customers actually need.What You'll DoCustomer Engagement & Technical DeliveryEmbed directly with strategic customers to understand their agent architectures, failure modes, and product goalsDesign and build custom RL environments, evaluation harnesses, and verifiers that capture what "good" looks like for each customer's domainArchitect agent scaffolding — tool use, multi-step reasoning, memory, sandbox execution — tailored to customer workflowsConfigure and launch training runs on Lab, iterating on reward functions, rollout strategies, and evaluation criteriaServe as the technical lead for engagements end-to-end: from discovery through deployed, improved modelsPlatform Feedback & EcosystemIdentify repeatable patterns from customer engagements and codify them into reference implementations, templates, and documentationServe as the voice of the customer internally, shaping the roadmap for Lab, verifiers, the Environments Hub, and training infrastructureBuild high-quality examples and "recipes" that make it easy for new customers and open-source contributors to extend the stackContribute to technical content (blog posts, tutorials, case studies) that demonstrates real-world platform usageApplied Research & ExperimentationDevelop novel evaluation methodologies for agentic behavior — multi-step reasoning, tool use correctness, recovery from failure, long-horizon task completionPrototype and iterate on agent harnesses for real-world tasks: code generation, workflow automation, document processing, and moreExperiment with reward design, rubric construction, and environment shaping to improve training signal qualityStay current on the frontier of agentic AI, evals, and post-training methods, and bring that knowledge directly into customer workWhat We're Looking ForDeep hands-on experience building, evaluating, or deploying LLM-based agents in the past 1–2 years — you've seen what breaks in production and know what good evals look likeStrong intuition for evaluation design: you can look at a customer's agent and quickly identify what to measure, how to construct a rubric, and where the reward signal is weakWorking understanding of RL and post-training concepts (GRPO, RLHF, reward modeling, SFT) — you don't need to have written a trainer from scratch, but you should understand what the knobs do and why they matterStrong Python skills and comfort with the modern AI stack (Hugging Face, inference engines, agent frameworks)Experience in a customer-facing or consulting-adjacent technical role, or as a technical founder — you're comfortable in a room with a customer's engineering team figuring out what to buildExcellent written and verbal communication — you can write a clear environment spec, a compelling case study, and a useful Slack message to a frustrated customerHigh agency and comfort with ambiguity. You don't wait for specs; you scope the problem, ship a solution, and iterateNice-to-HavesExperience with agent frameworks and tooling (DSPy, LangGraph, MCP, Stagehand, browser automation)Experience building or running LLM evaluation pipelines at scale (benchmarks, synthetic data generation, model grading)Research experience — publications, open-source contributions, or benchmarks in ML/RL/agentsFamiliarity with sandbox/code execution environments for agent evaluationWeb programming experience (React, TypeScript, Next.js) for building demos and customer-facing toolingWhat We OfferCash Compensation Range of $150-300k + equity incentivesFlexible Work (San Francisco or hybrid-remote)Visa Sponsorship & relocation supportProfessional Development budgetTeam Off-sites & conference attendanceGrowth OpportunityYou’ll join a mission-driven team working at the frontier of open, superintelligence infra. In this role, you’ll have the opportunity to:Shape the evolution of agent-driven solutions—from research breakthroughs to production systems used by real customers.Collaborate with leading researchers, engineers, and partners pushing the boundaries of RL and post-training.Grow with a fast-moving organization where your contributions directly influence both the technical direction and the broader AI ecosystem.If you’re excited to move fast, build bold