AI Researcher - Post-Training at SonarSource in Geneva

Keywords

• LLM Post-Training
• Static Analysis
• Machine Learning
• Agentic Coding
• Research

Summary

SonarSource in Geneva is looking for a senior researcher to develop next-generation solutions for enterprise-grade coding agents. You will combine static analysis expertise with LLM post-training techniques to build reliable AI code verification tools.

Job Description

SonarSource is a leader in AI code verification and governance, helping over 75% of the Fortune 100 build trusted software. As a senior researcher, you will join a cross-disciplinary team to innovate in the field of agent-centric software development. You will leverage Sonar's deep experience in static analysis while applying state-of-the-art large language model post-training techniques to create practical, high-impact products for enterprise customers.

Your tasks

• Develop and implement advanced products that enable customers to post-train models for agentic coding practices.
• Collaborate with researchers, MLOps, and engineers to translate prototypes into cutting-edge products.
• Drive research and innovation by staying up-to-date with LLM and agentic developments.
• Explain complex technical concepts to both technical and non-technical audiences.

Your profile

• Master's or PhD in Computer Science, Machine Learning, or a related quantitative field.
• At least 4 years of industry experience in machine learning.
• Fluency in Python and core ML frameworks; experience with Rust, C#, C++, JS/TS, or Java is a plus.
• Expertise in LLM post-training, including policy optimization, verifier-based RL, SFT, and PEFT.
• Experience driving research projects from prototype to product.

What we offer

• An in-office culture with three anchor days per week (Mondays, Tuesdays, and Thursdays).
• Relocation support for the right candidate based in Geneva.
• A commitment to diversity, equity, and inclusion in a global work environment.