Member of Engineering (Reinforcement Learning) position at Poolside AI.| EMEA/East Coast region

Poolside AI Member of Engineering (Reinforcement Learning)

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Remote (EMEA/E..........EMEA/East Coast region

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ABOUT POOLSIDEIn this decade, the world will create Artificial General Intelligence. There will only be a small number of companies who will achieve this. Their ability to stack advantages and pull ahead will define the winners. These companies will move faster than anyone else. They will attract the world's most capable talent. They will be on the forefront of applied research, engineering, infrastructure and deployment at scale. They will continue to scale their training to larger & more capable models. They will be given the right to raise large amounts of capital along their journey to enable this. They will create powerful economic engines. They will obsess over the success of their users and customers.Poolside exists to be this company: to build a world where AI will be the engine behind economically valuable work and scientific progress. We believe the fastest way to reach AGI lies in accelerating software development itself, by reshaping the developer experience with agentic systems, coding assistants, and the frontier models that power them. We deploy these systems directly into the development environments of security-conscious enterprises.ABOUT OUR TEAMWe were founded in the US and have our home there, but our team is distributed across Europe and North America. We get our fix of in-person collaboration (and croissants) in Paris each month for 3 days, always Monday-Wednesday, with an open invitation to stay the whole week. We also do longer off-sites once a year.Our team is a multidisciplinary blend of research, engineering, and business experts. What unites us is our deep care for what we build together. We’re in a race that requires hard work, intellectual curiosity, and obsession; to balance this intensity, we’ve assembled a team of low ego and kind-hearted individuals who have built the special culture Poolside has. By building collaboratively and with intention, we create a compounding effect that moves the entire company forward towards our mission: reaching AGI through intelligence systems built for software development.ABOUT THE ROLEYou would be working on our reinforcement learning team focused on improving reasoning and coding abilities of Large Language Models through reinforcement learning. This is a hands-on role where you’ll work end-to-end from researching new exploration or training algorithms, to designing and scaling up RL environments, to implementing your ideas across the stack. You will have access to thousands of GPUs in this team.YOUR MISSIONTo push the frontier of reasoning and coding capabilities of foundational models, via Reinforcement Learning.RESPONSIBILITIESResearch and experiment on ways to improve reasoning and code generation for LLMs. Own the full experiment life cycle from idea to experimentation and integrationKeep up with the latest research, and be familiar with the state of the art in LLMs, RL, and code generation. Translate research ideas into clean, reusable codebases that other researchers can build onDesign, analyze, and iterate on data generation and training of LLMsImplement and iterate on RL training pipelines that scale reliably across domainsDiagnose training instabilities and failures, debug RL runs and propose mitigation methodsWrite high-quality, reproducible and maintainable codeSKILLS & EXPERIENCEExperience with Large Language Models (LLM), including:Understanding of the Transformer architecture and scaling lawsMid-training and post-training techniquesExperience training reasoning and/or agentic modelsHands-on use of LLMs, with a sense of their capabilities and limitationsReinforcement Learning experienceSolid grasp of Reinforcement Learning concepts and familiarity with modern algorithmsExperience developing distributed, large-scale RL pipelines from data creation to evaluationsResearch experienceScientific publications in any of the following topics: Reinforcement Learning, LLMs and reasoning modelsAbility to discuss the latest research with sufficient level of detailIs reasonably opinionatedEngineering skillsStrong machine learning, algorithm skills and engineering backgroundExperience with distributed trainingExcellent programming skills in PythonFamiliarity with a deep learning framework (Pytorch or JAX)PROCESSIntro call with one of our Founding EngineersTechnical Interview(s) with one of our Founding EngineersTeam fit call with the People teamFinal interview with one of our Founding EngineersBENEFITSFully remote work & flexible hours37 days/year of vacation & holidaysHealth insurance allowance for you & dependents16 weeks of flexible, full-pay parental leaveWell-being, always-be-learning & home office allowancesCompany-provided equipmentFrequent team get togethersDiverse & inclusive people-first culture

Member of Engineering (Reinforcement Learning) job opportunity at Poolside AI.

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