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AI Engineer & Researcher - Reasoning Post-training image - Rise Careers
Job details

AI Engineer & Researcher - Reasoning Post-training

xAI is a mission-driven company focused on building AI systems that understand the universe and aid humanity. They seek an innovative AI Engineer & Researcher specialized in reasoning post-training to enhance AI model capabilities by applying creative, hands-on post-training methods. The role requires a blend of deep technical expertise and inventive problem-solving in a collaborative environment.

Skills

  • Expertise with post-training techniques like RLHF, DPO, or alignment methods focused on reasoning.
  • Strong programming skills in Python and experience with AI frameworks such as PyTorch.
  • Profound understanding of AI model architectures and reasoning, logic, or cognitive science principles.
  • Creative problem-solving with demonstrated research or engineering contributions.
  • Excellent communication and collaboration skills.

Responsibilities

  • Apply and innovate on post-training optimization techniques such as fine-tuning, reinforcement learning variants, and data augmentation.
  • Design creative methodologies including custom prompting frameworks and synthetic reasoning datasets to improve model cognition.
  • Explore and solve broad reasoning challenges through iterative experimentation and debugging logical inconsistencies.
  • Develop and implement novel benchmarks and metrics to evaluate post-training effects on reasoning capabilities.
  • Collaborate with cross-functional teams to integrate post-training advancements into the AI ecosystem.

Education

  • Advanced degree in Computer Science, AI, Machine Learning, Cognitive Science, or related field preferred.

Benefits

  • Competitive salary range from $180,000 to $440,000 annually.
  • Hybrid work model with mostly onsite presence in Palo Alto and flexibility for remote days.
  • Opportunity to work in a flat, initiative-driven organization emphasizing engineering excellence and innovation.
To read the complete job description, please click on the ‘Apply’ button

Average salary estimate

$310000 / YEARLY (est.)
min
max
$180000K
$440000K

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FUNDING
SENIORITY LEVEL REQUIREMENT
TEAM SIZE
No info
HQ LOCATION
No info
SALARY RANGE
$180,000/yr - $440,000/yr
EMPLOYMENT TYPE
Full-time, hybrid
DATE POSTED
July 25, 2025
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