Full Stack Software Engineer - Post-training

xAI is an innovative AI company focused on creating AI systems to understand the universe and advance human knowledge. They're seeking a Full Stack Software Engineer for their post-training team, which transforms pre-trained models into steerable, versatile systems capable of addressing real-world challenges.

The role combines full-stack development expertise with AI model deployment, requiring someone who can build sophisticated data management tools, visualization interfaces, and model evaluation platforms. The position is based in the Bay Area (San Francisco and Palo Alto), offering a competitive salary range of $180,000 - $440,000 USD.

The team operates with a flat organizational structure where all members are hands-on contributors. The ideal candidate should be an expert full-stack developer with strong experience in Python, TypeScript, React, and Rust, familiar with CI/CD practices and post-training workflows like supervised fine-tuning and reinforcement learning.

The role offers an opportunity to work at the cutting edge of AI development, building tools and platforms that will help advance the field. The company values engineering excellence, strong communication skills, and the ability to work effectively in a fast-paced, collaborative environment. The interview process is comprehensive but efficient, typically completed within one week, including coding assessments and technical sessions focused on post-training tooling problems.