AI Engineer - Reasoning

Xai
Palo Alto, CA

About the Position

As a Reasoning engineer, 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. We don’t rely on recruiters for assessments. Every application is reviewed by a member of our technical team. All interviews will be conducted via Google Meet.

Annual Salary Range


$180,000 - $440,000 USD

Posted 2025-09-22

Recommended Jobs

One-on-One

Delta-T Group Inc.
Altadena, CA

Location: Altadena, CA 91001 Date Posted: 10/31/2025 Category: Behavioral Education: None Position: Behavioral Aide LOCATION: Pasadena, CA 91103 CLIENT'S SUMMARY: Provides direct c…

View Details
Posted 2025-10-31

Staff Infrastructure/DevOps Engineer

Gatik Ai
Mountain View, CA

Who we are Gatik, the leader in autonomous middle-mile logistics, is revolutionizing the B2B supply chain with its autonomous transportation-as-a-service (ATaaS) solution and prioritizing safe, …

View Details
Posted 2025-09-22

Sr. Product Manager, AI

Kiddom
San Francisco, CA

Kiddom is redefining how technology powers learning. We combine world-class curriculum with cutting-edge AI and modern SaaS infrastructure to help schools deliver truly personalized education at scal…

View Details
Posted 2025-09-25

Visual Inspector - 2nd Shift (1:30 PM - 10:00 PM)

CPP- Rancho Cucamonga
Rancho Cucamonga, CA

ESSENTIAL JOB FUNCTIONS/DUTIES Organizes materials, tools, measuring devices, etc., necessary to complete assigned jobs and checks all documentation (travelers, special instructions, etc.,) which i…

View Details
Posted 2025-09-25

Managing Partner, IT Strategy Consulting, State & Local Government - Utilities

Gartner, Inc.
California

Description Who we are: Gartner’s Consulting business is an  extension  of Gartner’s industry-leading IT Research. From CIOs, to leaders in business and government, we help Gartner clients acr…

View Details
Posted 2025-10-27

Closer

loanDepot
Irvine, CA

Description Position at loanDepot Position Summary:   Responsible for closing, funding, and audit procedures for a pipeline of loans. This position ensures the performance of all duties in a…

View Details
Posted 2025-10-24

Sr. Project Engineer (Construction)

K2 Staffing
Los Angeles, CA

Our client is consistently recognized as a best workplace, and for our commitment to safety, sustainability, and community partnerships. They hire the very best in the construction industry and stri…

View Details
Posted 2025-10-03

Quality Site Lead (Sr. Manager) - Foster City

Gilead Sciences
Foster, CA

Job Description At Gilead, we’re creating a healthier world for all people. For more than 35 years, we’ve tackled diseases such as HIV, viral hepatitis, COVID-19 and cancer – working relentlessl…

View Details
Posted 2025-10-03

Case Manager - Personal Injury

Wilshire Law Firm
Los Angeles, CA

Case Manager - Personal Injury Wilshire Law Firm is a distinguished, award-winning legal practice with over 18 years of experience, specializing in Personal Injury, Employee Rights, and Consumer Cl…

View Details
Posted 2025-10-22