Member of Technical Staff – Large Scale Reinforcement Learning

At Microsoft AI, we are on a mission to develop the most cutting-edge algorithms for post-training large language models (LLMs) and ship those models to millions of users every day.

The RL team at Microsoft AI is responsible for large-scale reinforcement learning and improving our pre-trained models to advance their capabilities in reasoning, instruction following, agentic coding, and agentic knowledge work.

As a Member of Technical Staff – Large Scale Reinforcement Learning, you will contribute across all stages of the RL process: driving the curation of high-quality RL environments and training data, building evaluations that measure both core model capabilities and real-world performance, and applying advanced RL techniques to develop and improve our RL recipe. We work at the bleeding edge, leveraging the most powerful pre-trained models, algorithms, and sources of feedback available to us. We are an interdisciplinary team of engineers and scientists, learning from each other and collaborating closely to build the best possible models.

We are looking for outstanding individuals excited about contributing to the next generation of models that will transform the field. You will thrive in a highly collaborative, fast-paced environment, have a high degree of craftsmanship, and pay close attention to detail, consistently striving for engineering excellence.

Responsibilities

• Work on our data collection, evaluation, and reinforcement learning methods for models.
• Design hypotheses and experiment plans for rapidly iterating on model performance.

Required Qualifications

• Bachelor's degree in Computer Science, Machine Learning, Mathematics, or a related technical field, or equivalent experience.
• 4+ years of software engineering experience.
• Experience with reinforcement learning and LLMs.

Preferred Qualifications

• Experience building and scaling large AI systems.
• Experience applying reinforcement learning to AI models and agents.
• Strong collaboration and communication skills.

The typical base pay range for this role across the United Kingdom is £91,800 - £137,600 per year. The typical base pay range for this role across Switzerland is 183,800 CHF - 275,800 CHF per year.