Full Stack Software Engineer, xAI
Post Training
$180-440k
More information about location
Building artificial intelligence
Job no longer available
Building artificial intelligence
1001+ employees
Job no longer available
$180-440k
More information about location
1001+ employees
Company mission
To build AI systems that can help humanity understand the world better.
Role
Who you are
- Expert full-stack developer
- Experienced in standard software engineering best practices (CI/CD) and care about code quality, testing, and performance
- Familiar with common post-training workflows such as supervised fine-tuning and reinforcement learning from human feedback
What the job involves
- The post-training team at xAI transforms powerful pre-trained models to become steerable, versatile, and capable of understanding and addressing real-world challenges
- To accomplish this, we are looking for expert full-stack developers to join our team to improve our research tooling and advance our research
- Key responsibilities of the role include developing user-friendly, high-performance data management and visualization tools, creating model evaluation platforms and optimizing the efficiency of the entire post-training workflow
- Building user-friendly and performant data management and visualization interfaces
- Building user-friendly and performant model evaluation applications
- Building research demos to explore the frontier of AI products, and iterate quickly based on real-world feedback
- Owning end-to-end experience of the created application, and working within teams and cross functions to improve the experience
Application process
- After submitting your application, the team will review 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 technical interviews:
- 1 coding assessment in a programming language of your choice
- 2 x post-training tooling technical sessions: These sessions will be assessing your engineering skills to design and implement solutions to solve tooling problems in post-training
- Meet the Team: Present your past exceptional work and your vision with xAI to a few more members from the 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
Our take
xAI is Elon Musk's venture into the world of artificial intelligence, and like all things Musk, it's going big. Its setting out to build AI that helps humanity understand the universe and its starting with Grok, its conversational AI chatbot already integrated into X (formerly Twitter). With access to real-time data and a powerful ecosystem of Musk-led companies, xAI is certainly pushing towards artificial general intelligence at serious scale.
Like all bold ventures, xAI has faced its share of controversy, from questions about regulation to the overlap across Musk's businesses. But fans are still seeing the bigger picture: an interconnected tech ecosystem where AI, social media, and space exploration feed into one another.
Recently, the company made headlines with its massive "Colossus" supercomputer project, powered by tens of thousands of Nvidia GPUs. While the data center's temporary power setup has faced environmental scrutiny, the scale of ambition is certainly undeniable. From launching tap-to-pay features on X to building one of the most powerful AI training systems on Earth, xAI is moving fast.
Steph
Company Specialist at Welcome to the Jungle
Company
Funding (last 2 of 4 rounds)
Jul 2025
$5bn
GROWTH EQUITY VC
Dec 2024
$6bn
SERIES C
Total funding: $17.1bn
Company benefits
- Health and wellness: Comprehensive health insurance including medical, dental, vision, and disability coverage
- Life and family: Life and AD&D insurance and fertility benefits to ensure our team’s well-being and peace of mind
- Flexible vacation: We work hard but avoid burn out. Take time off when you need it
- Visa sponsorship: We support international talent with visa sponsorship to join our team
- 401(k) plan: Retirement savings plan to secure your financial future
Company HQ
Downtown, Burlingame, CA
Leadership
Elon Musk
(Founder)Founder, Chairman, CEO, and CTO of SpaceX. CEO and Product Architect of Tesla. Chairman and CTO of X Corp, founder of the Boring Company, co-founder of Neuralink and OpenAI, and president of the Musk Foundation.
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