Open roles

403 postings · verified 2026-10-05 · a repost appears here once per listing but counts once in the statistics (how we count)

• Member of Technical Staff - Data Quality Engineer (Post-training)

  Reflection AI · San Francisco, CA | London | New York, NY · Research Engineer · first seen 2026-09-29

  EvalsLLMsRL / post-trainingPython
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• Member of Technical Staff - Research Software Engineer

  Reflection AI · New York, NY | San Francisco, CA | London · Software Eng · first seen 2026-09-29

  RL / post-trainingPyTorchJAXCUDA / TritonDistributed trainingKubernetes
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• Forward Deployed Engineer - LLM Post-training

  Reflection AI · San Francisco, CA | New York, NY · FDE / Applied · first seen 2026-09-29

  EvalsFine-tuningRL / post-trainingPython
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• Research Program Manager - Model Evals and Safety

  Reflection AI · New York, NY | San Francisco, CA | London · Program / Ops · first seen 2026-09-29

  EvalsRL / post-training
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• Member of Technical Staff - Safety

  Reflection AI · San Francisco, CA | London | New York, NY · Safety / Policy · first seen 2026-09-29

  EvalsLLMsRL / post-training
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• Research Program Manager - Model Development

  Reflection AI · New York, NY | San Francisco, CA | London · Program / Ops · first seen 2026-09-29

  RL / post-training
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• Member of Technical Staff, Data Flywheel

  Reflection AI · New York, NY | San Francisco, CA | London · Research Engineer · first seen 2026-09-29

  EvalsRAG / retrievalLLMsRL / post-training
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• Forward Deployed Engineer, Lead - LLM Post-training

  Reflection AI · New York, NY | San Francisco, CA · FDE / Applied · first seen 2026-09-29

  EvalsLLMsFine-tuningRL / post-trainingDistributed training
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• Member of Technical Staff - Post-Training

  Reflection AI · San Francisco, CA | London | New York, NY · Research Engineer · first seen 2026-09-29

  LLMsRL / post-training
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• Research Engineer - Reinforcement Learning

  Prime Intellect · San Francisco | Remote · Remote · Research Engineer · first seen 2026-09-29

  RL / post-trainingvLLM / SGLang / TensorRT
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• Applied Research - Evals & Data

  Prime Intellect · New York City, USA · Evals / Data · first seen 2026-09-29

  EvalsRL / post-trainingDistributed trainingKubernetes
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• Member of Technical Staff - Inference

  Prime Intellect · Remote | San Francisco · Inference / Perf · first seen 2026-09-29

  LLMsRL / post-trainingPyTorchCUDA / TritonvLLM / SGLang / TensorRTDistributed trainingKubernetesPython
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• Forward Deployed AI Strategy Lead

  Prime Intellect · San Francisco · FDE / Applied · first seen 2026-09-29

  EvalsMCPRL / post-training
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• Research Engineer - Distributed Training

  Prime Intellect · San Francisco | Remote · Remote · Research Engineer · first seen 2026-09-29

  RL / post-trainingPyTorchCUDA / TritonvLLM / SGLang / TensorRTDistributed training
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• Member of Technical Staff - Training Platform

  Prime Intellect · San Francisco · Infra / Hardware · first seen 2026-09-29

  Fine-tuningRL / post-trainingvLLM / SGLang / TensorRTDistributed trainingKubernetesPythonTypeScript
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• Applied Research - Forward-Deployed

  Prime Intellect · San Francisco · FDE / Applied · first seen 2026-09-29

  EvalsMCPLLMsPromptingRL / post-trainingPython
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• Applied AI: Product Strategy & Revenue Lead

  Prime Intellect · San Francisco · GTM · first seen 2026-09-29

  EvalsLLMsRL / post-training
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• Head of Marketing

  Prime Intellect · San Francisco · GTM · first seen 2026-09-29

  RL / post-trainingDistributed training
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• Head of Growth

  Prime Intellect · San Francisco · GTM · first seen 2026-09-29

  RL / post-training
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• Applied Research - RL & Agents

  Prime Intellect · San Francisco · Other · first seen 2026-09-29

  EvalsMCPLLMsRL / post-trainingvLLM / SGLang / TensorRTDistributed trainingKubernetesTypeScript
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• Member of Technical Staff - Sandbox Platform

  Prime Intellect · San Francisco · Infra / Hardware · first seen 2026-09-29

  RL / post-trainingRustGoC++
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• Research Engineer - RL Infrastructure

  Prime Intellect · San Francisco | Remote · Remote · Research Engineer · first seen 2026-09-29

  RL / post-trainingPyTorchCUDA / TritonvLLM / SGLang / TensorRTDistributed training
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• Member of Technical Staff (AI Software Engineer, Agents)

  Perplexity · San Francisco · AI / ML Engineer · $220K–$405K base · first seen 2026-09-29

  LLMsRL / post-trainingPythonTypeScriptRustGo
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• Member of Technical Staff (AI Researcher)

  Perplexity · San Francisco | Palo Alto | London | Berlin · Research Scientist · $220K–$485K base · first seen 2026-09-29

  LLMsFine-tuningRL / post-trainingPyTorchDistributed trainingPython
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• Engineering Manager (TLM, Agents)

  Perplexity · San Francisco · Software Eng · $300K–$405K base · first seen 2026-09-29

  LLMsRL / post-trainingPythonTypeScriptRustGo
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• Member of Technical Staff (Applied AI Engineer, Agent Capabilities)

  Perplexity · San Francisco | New York City · FDE / Applied · $220K–$405K base · first seen 2026-09-29

  EvalsLLMsPromptingRL / post-trainingPythonTypeScriptRustGo
  Save Member of Technical Staff (Applied AI Engineer, Agent Capabilities)
• ML Systems Engineer

  Periodic Labs · Menlo Park, CA · Software Eng · first seen 2026-09-29

  RL / post-trainingJAXCUDA / TritonvLLM / SGLang / TensorRTDistributed training
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• Research Scientist, Data

  Periodic Labs · Menlo Park, CA | Montreal, Canada · Research Scientist · first seen 2026-09-29

  EvalsLLMsRL / post-training
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• Computational Scientist, Structural & Thermal

  Periodic Labs · Menlo Park, CA · Research Scientist · first seen 2026-09-29

  LLMsRL / post-trainingPythonC++PhD
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• Research Scientist

  OpenRouter · Remote (US) · Remote · Research Scientist · $250K–$285K base · first seen 2026-09-29

  EvalsLLMsFine-tuningRL / post-trainingPython
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• Software Engineer, Kernel Performance & AI Tooling

  OpenAI · San Francisco · Inference / Perf · $266K–$445K base · first seen 2026-09-29

  RL / post-training
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• Researcher, Agent Safety, Training and Evaluations

  OpenAI · San Francisco · Research Scientist · $380K–$500K base · first seen 2026-09-29

  EvalsRL / post-training
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• Agent Post-Training, Context Research

  OpenAI · San Francisco · Research Engineer · $380K–$500K base · first seen 2026-09-29

  EvalsLLMsPromptingRL / post-training
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• Researcher, Multimodal Safety

  OpenAI · San Francisco · Research Scientist · $380K–$500K base · first seen 2026-09-29

  EvalsLLMsPromptingRL / post-training
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• Research Engineer, AI for Chip Design

  OpenAI · San Francisco · Research Engineer · $380K–$500K base · first seen 2026-09-29

  EvalsRL / post-training
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• Research Engineer, Frontier Evals & Environments

  OpenAI · San Francisco · Research Engineer · $295K–$380K base · first seen 2026-09-29

  EvalsLLMsRL / post-training
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• Agent Post-Training, API & Power Users

  OpenAI · San Francisco · Research Engineer · $380K–$500K base · first seen 2026-09-29

  EvalsLLMsRL / post-training
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• Researcher, Safety Training, National Security

  OpenAI · San Francisco | Washington, DC | US - Remote · Remote · Research Scientist · $380K–$500K base · first seen 2026-09-29

  EvalsRL / post-training
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• Researcher, Frontier Risk Mitigations

  OpenAI · San Francisco | London, UK · Research Scientist · $380K–$500K base · first seen 2026-09-29

  EvalsRL / post-trainingPythonPhD
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• Agent Post-Training, Connectors Research

  OpenAI · San Francisco · Research Engineer · $380K–$500K base · first seen 2026-09-29

  EvalsLLMsPromptingRL / post-training
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• Agent Post-Training, Frontier Evals and Environments Research

  OpenAI · San Francisco · Research Engineer · $380K–$500K base · first seen 2026-09-29

  EvalsLLMsRL / post-training
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• Researcher, Safety Oversight

  OpenAI · San Francisco · Research Scientist · $380K–$500K base · first seen 2026-09-29

  RL / post-trainingPythonPhD
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• Researcher, Alignment

  OpenAI · San Francisco · Research Scientist · $295K–$500K base · first seen 2026-09-29

  EvalsRL / post-trainingPyTorchPythonTypeScriptPhD
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• Engineering Manager, MLE

  OpenAI · San Francisco · AI / ML Engineer · $500K–$555K base · first seen 2026-09-29

  LLMsFine-tuningRL / post-trainingPyTorch
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• Research Engineer/Research Scientist- Personal AGI, Model Experience

  OpenAI · San Francisco · Research Engineer · $380K–$500K base · first seen 2026-09-29

  EvalsLLMsRL / post-training
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• Researcher, Alignment CoT Monitorability

  OpenAI · San Francisco · Research Scientist · $295K–$500K base · first seen 2026-09-29

  EvalsLLMsRL / post-training
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• Machine Learning Engineer, Monetization AI/ML

  OpenAI · San Francisco · AI / ML Engineer · $381K–$555K base · first seen 2026-09-29

  LLMsFine-tuningRL / post-trainingPyTorch
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• Research Engineer/Research Scientist, RL/Reasoning

  OpenAI · San Francisco · Research Engineer · $295K–$445K base · first seen 2026-09-29

  LLMsRL / post-training
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• Research Engineer, Codex

  OpenAI · San Francisco · Research Engineer · $380K–$500K base · first seen 2026-09-29

  EvalsLLMsPromptingRL / post-training
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• Research Engineer / Research Scientist / AI Systems Engineer, RSI

  OpenAI · San Francisco · Research Engineer · $295K–$445K base · first seen 2026-09-29

  EvalsLLMsRL / post-training
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