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AI Engineer & Researcher - Multimodal Post-training

Xai

$180,000 - $440,000
Oct 9, 2025
Palo Alto, CA, US
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xAI is looking to build the next generation of Multimodal Grok that excels at reasoning and tool usage to solve challenging problems.

Requirements

  • Experience or publications in (multimodal) large language models (data / training algorithm / architecture)
  • Exceptional engineering skills to iterate quickly on the data processing and training pipelines
  • Strong understanding of large language model and data
  • Deep knowledge of reinforcement learning techniques

Responsibilities

  • Build the next generation of Multimodal Grok that excels at reasoning, tool usage to solve challenging problems
  • Work across the LLM stack (pre-training, SFT, RL) to deliver the strongest model for end users

Other

  • All employees are expected to be hands-on and to contribute directly to the company’s mission.
  • Leadership is given to those who show initiative and consistently deliver excellence.
  • Work ethic and strong prioritization skills are important.
  • All engineers and researchers are expected to have strong communication skills.
  • Candidates are expected to be located near Palo Alto or open to relocation.