Research Engineer - Post-Training

Voltai, Inc

$120K — $150K *
Technical Services
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • 5+ years of experience in reinforcement learning environments for AI models
  • Proven expertise in building evaluation datasets for complex reasoning tasks
  • Strong collaboration skills with hardware and verification domain experts
  • Experience in designing reward functions and feedback systems
  • Familiarity with large-scale RL fine-tuning for advanced models
  • Knowledge of applying RL or curriculum learning in symbolic reasoning domains

Responsibilities

  • Post-train AI models for semiconductor design and verification tasks
  • Collaborate with experts to create reinforcement learning environments
  • Develop structured reward functions to enhance model performance
  • Conduct simulations to identify verification gaps in designs
  • Iteratively improve chip architecture proposals through model feedback
  • Advance the capabilities of AI systems for next-generation silicon design

Benefits

  • Collaboration with experts from top tech companies
  • Involvement in cutting-edge semiconductor innovation
  • Opportunity to work alongside award-winning engineers
  • Access to a high-impact work environment supported by elite investors
  • Engagement in a diverse and intellectually rigorous team
Full Job Description
Post-Training

In this role, you will post-train frontier models to autonomously perform complex tasks across the semiconductor design and verification pipeline. Models you train will propose and optimize chip architectures, generate and refine RTL code, run simulations, identify verification gaps, and iteratively improve designs - accelerating the pace of semiconductor innovation.
You will collaborate with leading experts in hardware design, verification, and computer architecture to design rich reinforcement learning environments that capture the intricacies of chip design workflows. You'll develop structured reward functions, scaling strategies, and evaluation frameworks that push models toward higher reliability, efficiency, and creativity in semiconductor reasoning.
Your work will directly advance the goal of creating AI systems capable of reasoning about, designing, and verifying next-generation silicon systems.

You might thrive in this role if you have experience with
  • Creating and scaling RL environments for LLMs or multimodal agents
  • Building high-quality evaluation datasets and benchmarks for complex reasoning or design tasks
  • Working closely with domain experts in hardware and verification to define evaluation metrics, constraints, and simulation conditions
  • Designing reward functions and feedback pipelines that balance correctness, performance, and design efficiency
  • Running large-scale RL fine-tuning or post-training experiments for frontier models
  • Applying reinforcement learning or curriculum learning to structured reasoning or symbolic domains

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