Demo

LLM & RL Engineer / Agents Engineering

YC Bench
Cambridge, MA Full Time
POSTED ON 4/15/2026
AVAILABLE BEFORE 5/15/2026
Company Description

YC Bench is a live benchmarking platform that evaluates and ranks forecasting models to predict the success of Y Combinator startups compared to their cohort peers. Our mission is to bring transparency and analytics to the startup ecosystem, enabling data-driven decisions. By leveraging cutting-edge machine learning and AI, we aim to set the gold standard for assessing startup performance potential. Join us to make an impact on how innovation thrives in early-stage ventures.

Role Description

This is a full-time remote role for a LLM & Reinforcement Learning Engineer specializing in Agents Engineering. The role involves designing, developing, and deploying cutting-edge large language models (LLMs) and reinforcement learning (RL)-based agents. Day-to-day activities include implementing algorithms, fine-tuning pre-trained models, integrating AI solutions into scalable systems, performing rigorous evaluations, and collaborating with cross-functional teams to address core machine learning challenges. You will support the innovation cycle, from ideation to execution, and contribute to improving overall model performance for benchmarking solutions.

Qualifications

  • Proficiency in designing, implementing, and fine-tuning Large Language Models (LLMs) and expertise in Reinforcement Learning algorithms.
  • Experience with training deep learning models, neural networks, and frameworks like TensorFlow or PyTorch.
  • Strong background in Python and familiarity with related data science libraries such as NumPy, pandas, and Scikit-learn.
  • Experience with software engineering best practices, including version control (Git), containerization (Docker), and deployment pipelines.
  • Familiarity with agent-based systems and AI integrations within software solutions is a plus.
  • Proven experience with quantitative research, data analysis, and model evaluation to drive data-informed decisions.
  • Excellent problem-solving skills, critical thinking, and the ability to work collaboratively in cross-functional teams.
  • Master’s or PhD in Computer Science, Machine Learning, Artificial Intelligence, or a related field is preferred.

Salary.com Estimation for LLM & RL Engineer / Agents Engineering in Cambridge, MA
$124,067 to $159,814
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