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42dot

Unified platform for multi-modal urban mobility

Reinforcement Learning Engineer - Autonomous Driving

Applied Machine LearningConfirmed live in the last 24 hours
Full-timePangyo-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, South KoreaNo salary listedHybrid

About the Job

Requirements

  • At least 3 years of experience in machine learning, reinforcement learning, or robotics, or equivalent research and development capability.
  • Experience implementing policy-learning algorithms and conducting training and evaluation with Python and PyTorch.
  • Understanding of policy optimization, reward design, and credit assignment, and ability to design reinforcement-learning experiments.
  • Experience training policies in simulation or multi-agent environments and validating improvement against a baseline.
  • English communication skills sufficient to discuss technical issues and collaborate with overseas offices.

Responsibilities

  • Design the VLA policy and simulator observation/action interface, and develop closed-loop reinforcement-learning post-training using policy-optimization methods such as GRPO and PPO.
  • Develop self-play training structures in vector- or occupancy-based driving simulators, where the ego vehicle and traffic agents interact with the training policy and past checkpoints.
  • Jointly develop with simulation-environment developers action selection based on expected return and safety constraints by rolling out candidate actions and trajectories from the trained policy across possible future scenarios.
  • Validate policy safety and generalization using closed-loop benchmarks, and analyze reward hacking and simulator bias.

Desired Qualifications

  • Experience developing training structures using self-play, multi-agent reinforcement learning, or policy populations.
  • Experience applying reinforcement-learning post-training such as GRPO or PPO to VLA or generative policies.
  • Experience training policies in vector- or occupancy-based driving simulators, or developing world-model-based rollout planning.
  • Experience with large-scale parallel rollout, distributed training, or sim-to-real validation.

About the Company

42dot

Unified platform for multi-modal urban mobility

42dot.ai provides a platform called UMOS (Urban Mobility Operating System) that connects and manages multiple transportation modes—such as cars and drones—within a single system for cities, agencies, and private clients. UMOS enables efficient transportation management, demand-response services, and smart logistics by integrating data and operations across modes, powering operations through a subscription-based platform-as-a-service model. Unlike single-mode solutions, 42dot.ai offers multi-modal, city-focused orchestration that bridges public, private, and logistics needs. The company aims to transform urban mobility by helping cities run more efficiently, cut costs, and improve the experience for commuters and logistics providers.

Company size
501-1,000
Company stage
Growth Equity (Venture Capital)
Total funding
$731.9M
Headquarters
Seoul, South Korea
Founded
2019

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