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Member of Technical Staff - Reasoning

xAI

Member of Technical Staff - Reasoning

full-timePosted: Dec 29, 2025

Job Description

About xAI

xAI’s mission is to create AI systems that can accurately understand the universe and aid humanity in its pursuit of knowledge. Our team is small, highly motivated, and focused on engineering excellence. This organization is for individuals who appreciate challenging themselves and thrive on curiosity. We operate with a flat organizational structure. 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 are expected to have strong communication skills. They should be able to concisely and accurately share knowledge with their teammates.

About the Position

As a Member of Technical Staff, you will build frameworks to improve the reasoning capability, build distributed reinforcement learning systems, techniques for inference time compute (e.g. tree search and planning), and develop environments for agents.

You will get exposure and will be expected to solve and take ownership of components across the entire stack.

Tech Stack

  • Python
  • JAX
  • Rust

Location

The role is based in the Bay Area [San Francisco and Palo Alto]. Candidates are expected to be located in the Bay Area or open to relocation.

Focus

  • Build robust and scalable distributed RL systems.
  • Optimize frameworks to enable complex inference-time reasoning.
  • Develop environments and harnesses for agents.

Ideal Experiences

  • Experienced with large-scale reinforcement learning systems.
  • Designing and implementing distributed systems.
  • Keeping up with state-of-the-art RL and inference time compute algorithms.

Interview Process

After submitting your application, the team reviews your CV and statement of exceptional work. If your application passes this stage, you will be invited to a 15 minute interview (“phone interview”) during which a member of our team will ask some basic questions. If you clear the initial phone interview, you will enter the main process, which consists of four technical interviews:

  1. Coding assessment in a language of your choice.
  2. Systems hands-on: Demonstrate practical skills in a live problem-solving session.
  3. Project deep-dive: Present your past exceptional work to a small audience.
  4. Meet and greet with the wider team.

Our goal is to finish the main process within one week. All interviews will be conducted via Google Meet.

Annual Salary Range

$180,000 - $440,000 USD

Benefits

Base salary is just one part of our total rewards package at xAI, which also includes equity, comprehensive medical, vision, and dental coverage, access to a 401(k) retirement plan, short & long-term disability insurance, life insurance, and various other discounts and perks.

xAI is an equal opportunity employer. For details on data processing, view our Recruitment Privacy Notice.

Locations

  • Palo Alto, CA,
  • San Francisco, CA,

Salary

180,000 - 440,000 USD / yearly

Skills Required

  • Pythonintermediate
  • JAXintermediate
  • Rustintermediate
  • Large-scale reinforcement learning systemsintermediate
  • Distributed systemsintermediate
  • RL and inference time compute algorithmsintermediate
  • Strong communication skillsintermediate
  • Work ethic and strong prioritization skillsintermediate

Required Qualifications

  • Experienced with large-scale reinforcement learning systems (experience)
  • Designing and implementing distributed systems (experience)
  • Keeping up with state-of-the-art RL and inference time compute algorithms (experience)

Responsibilities

  • Build frameworks to improve the reasoning capability
  • Build distributed reinforcement learning systems
  • Techniques for inference time compute (e.g. tree search and planning)
  • Develop environments for agents
  • Solve and take ownership of components across the entire stack
  • Build robust and scalable distributed RL systems
  • Optimize frameworks to enable complex inference-time reasoning
  • Develop environments and harnesses for agents

Benefits

  • general: Equity
  • general: Comprehensive medical, vision, and dental coverage
  • general: Access to a 401(k) retirement plan
  • general: Short & long-term disability insurance
  • general: Life insurance
  • general: Various other discounts and perks

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xAI logo

Member of Technical Staff - Reasoning

xAI

Member of Technical Staff - Reasoning

full-timePosted: Dec 29, 2025

Job Description

About xAI

xAI’s mission is to create AI systems that can accurately understand the universe and aid humanity in its pursuit of knowledge. Our team is small, highly motivated, and focused on engineering excellence. This organization is for individuals who appreciate challenging themselves and thrive on curiosity. We operate with a flat organizational structure. 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 are expected to have strong communication skills. They should be able to concisely and accurately share knowledge with their teammates.

About the Position

As a Member of Technical Staff, you will build frameworks to improve the reasoning capability, build distributed reinforcement learning systems, techniques for inference time compute (e.g. tree search and planning), and develop environments for agents.

You will get exposure and will be expected to solve and take ownership of components across the entire stack.

Tech Stack

  • Python
  • JAX
  • Rust

Location

The role is based in the Bay Area [San Francisco and Palo Alto]. Candidates are expected to be located in the Bay Area or open to relocation.

Focus

  • Build robust and scalable distributed RL systems.
  • Optimize frameworks to enable complex inference-time reasoning.
  • Develop environments and harnesses for agents.

Ideal Experiences

  • Experienced with large-scale reinforcement learning systems.
  • Designing and implementing distributed systems.
  • Keeping up with state-of-the-art RL and inference time compute algorithms.

Interview Process

After submitting your application, the team reviews your CV and statement of exceptional work. If your application passes this stage, you will be invited to a 15 minute interview (“phone interview”) during which a member of our team will ask some basic questions. If you clear the initial phone interview, you will enter the main process, which consists of four technical interviews:

  1. Coding assessment in a language of your choice.
  2. Systems hands-on: Demonstrate practical skills in a live problem-solving session.
  3. Project deep-dive: Present your past exceptional work to a small audience.
  4. Meet and greet with the wider team.

Our goal is to finish the main process within one week. All interviews will be conducted via Google Meet.

Annual Salary Range

$180,000 - $440,000 USD

Benefits

Base salary is just one part of our total rewards package at xAI, which also includes equity, comprehensive medical, vision, and dental coverage, access to a 401(k) retirement plan, short & long-term disability insurance, life insurance, and various other discounts and perks.

xAI is an equal opportunity employer. For details on data processing, view our Recruitment Privacy Notice.

Locations

  • Palo Alto, CA,
  • San Francisco, CA,

Salary

180,000 - 440,000 USD / yearly

Skills Required

  • Pythonintermediate
  • JAXintermediate
  • Rustintermediate
  • Large-scale reinforcement learning systemsintermediate
  • Distributed systemsintermediate
  • RL and inference time compute algorithmsintermediate
  • Strong communication skillsintermediate
  • Work ethic and strong prioritization skillsintermediate

Required Qualifications

  • Experienced with large-scale reinforcement learning systems (experience)
  • Designing and implementing distributed systems (experience)
  • Keeping up with state-of-the-art RL and inference time compute algorithms (experience)

Responsibilities

  • Build frameworks to improve the reasoning capability
  • Build distributed reinforcement learning systems
  • Techniques for inference time compute (e.g. tree search and planning)
  • Develop environments for agents
  • Solve and take ownership of components across the entire stack
  • Build robust and scalable distributed RL systems
  • Optimize frameworks to enable complex inference-time reasoning
  • Develop environments and harnesses for agents

Benefits

  • general: Equity
  • general: Comprehensive medical, vision, and dental coverage
  • general: Access to a 401(k) retirement plan
  • general: Short & long-term disability insurance
  • general: Life insurance
  • general: Various other discounts and perks

Target Your Resume for "Member of Technical Staff - Reasoning" , xAI

Get personalized recommendations to optimize your resume specifically for Member of Technical Staff - Reasoning. Takes only 15 seconds!

AI-powered keyword optimization
Skills matching & gap analysis
Experience alignment suggestions

Check Your ATS Score for "Member of Technical Staff - Reasoning" , xAI

Find out how well your resume matches this job's requirements. Get comprehensive analysis including ATS compatibility, keyword matching, skill gaps, and personalized recommendations.

ATS compatibility check
Keyword optimization analysis
Skill matching & gap identification
Format & readability score

Tags & Categories

Foundation ModelFoundation Model
Quiz Challenge

Answer 10 quick questions to check your fit for Member of Technical Staff - Reasoning @ xAI.

10 Questions
~2 Minutes
Instant Score

Related Books and Jobs

No related jobs found at the moment.