xAI · 1 week ago
Machine Learning Engineer, Safety
Palo Alto, CA
Full-time
Onsite
Senior Level
$200K/yr - $350K/yr
5+ years expxAI is dedicated to creating AI systems that enhance human understanding and knowledge. They are looking for a passionate Machine Learning Engineer to join their Applied Safety team, responsible for developing ML solutions to ensure user safety and compliance with X's Terms of Service.
Artificial Intelligence (AI)Foundational AIGenerative AIInformation TechnologyMachine Learning
Responsibilities
Own the end-to-end machine learning lifecycle for safety systems, including data gathering, cleaning, model training, evaluation, and serving at scale
Develop ML models to detect and remediate violative content in areas like abuse, spam, and child safety
Integrate models into production systems for real-time inference and high-throughput processing
Apply creative problem-solving to build novel ML solutions in uncharted spaces
Collaborate across engineering, product, and operations to enhance the safety ecosystem
Lead technical initiatives in ML-driven areas like fraud detection or content moderation
Qualification
Required
5+ years in machine learning engineering or related roles
Proven experience managing the full ML lifecycle, from data preparation to model serving
Familiarity with modern data pipelines and ML infrastructure ecosystems
Enjoyment of 0-to-1 environments, where you trailblaze novel ML solutions
Preferred
Prior experience in Trust and Safety or applying ML to content moderation
Experience applying LLMs to real-world problems, such as natural language understanding or anomaly detection
Fluency in Python, with knowledge of ML libraries (e.g., TensorFlow, PyTorch)
Background in scalable systems for handling large datasets
Benefits
Equity
Comprehensive medical, vision, and dental coverage
Access to a 401(k) retirement plan
Short & long-term disability insurance
Life insurance
Various other discounts and perks
Company
xAI
XAI is an artificial intelligence startup that develops AI solutions and tools to enhance reasoning and search capabilities.
11-50 employees
H1B Sponsorship
xAI has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (1)
Funding
Current Stage
Late StageTotal Funding
$42.73BKey Investors
Neptune Digital AssetsSpaceXMorgan Stanley
2026-01-06Series E· $20B
2025-12-11Secondary Market· $0.3M
2025-07-13Corporate Round· $5.32B
Leadership Team
Toby Pohlen
Founding Member
Recent News
2026-01-18
2026-01-18
Company data provided by crunchbase