Machine Learning Engineer, Safety

xAI • Palo Alto, CA

80d • $200,000 - $350,000

About The Position

We are seeking a passionate and innovative Machine Learning Engineer to join xAI’s Applied Safety team, where you will drive the development of cutting-edge ML solutions to ensure compliance with X’s Terms of Service and enhance user safety. In this role, you will own the full machine learning lifecycle, building and deploying models to detect and mitigate threats like abuse, spam, and fraud, while fostering a secure and trusted global digital public square. Ideal candidates are creative problem-solvers who thrive in 0-to-1 environments, prioritize impactful code over documentation, and are excited to apply advanced ML techniques to high-stakes safety challenges.

Requirements

• 5+ years of experience in machine learning engineering or related roles.
• Proven expertise in managing the full ML lifecycle, from data preparation to model serving.
• Familiarity with modern data pipelines and ML infrastructure ecosystems.
• A passion for 0-to-1 environments, with a track record of trailblazing novel ML solutions.

Nice To Haves

• Prior experience in Trust and Safety or applying ML to content moderation challenges.
• Experience leveraging large language models (LLMs) for real-world applications, such as natural language understanding or anomaly detection.
• Fluency in Python, with proficiency in ML libraries like TensorFlow or PyTorch.
• Background in designing and managing scalable systems for large datasets.
• A passion for xAI’s mission to advance human scientific discovery and foster open, authentic interactions.
• A proactive mindset with a touch of humor to thrive in a fast-paced, impact-driven environment.

Responsibilities

• Own the end-to-end machine learning lifecycle for safety systems, including data gathering, cleaning, model training, evaluation, and serving at scale.
• Develop and deploy ML models to detect and remediate violative content in areas such as abuse, spam, and child safety.
• Integrate models into production systems for real-time inference and high-throughput processing to support platform integrity.
• Apply creative problem-solving to design novel ML solutions for uncharted safety challenges.
• Collaborate with engineering, product, and operations teams to enhance xAI’s safety ecosystem.
• Lead technical initiatives in ML-driven areas like fraud detection or content moderation.

Benefits

• Equity
• Comprehensive medical coverage
• Vision coverage
• Dental coverage
• Access to a 401(k) retirement plan
• Short & long-term disability insurance
• Life insurance
• Various other discounts and perks

What This Job Offers

• Job Type: Full-time
• Number of Employees: 1,001-5,000 employees