xAI creates AI systems to understand the universe and aid humanity in its pursuit of knowledge.

xAI is at the forefront of creating AI systems that aim to understand the universe and advance human knowledge. As a mobile engineer, you'll be instrumental in bringing xAI's sophisticated models and algorithms to life through consumer products that will reach millions of users worldwide.

The company operates with a flat organizational structure where initiative and excellence are rewarded with leadership opportunities. The team is small, highly motivated, and focused on engineering excellence, making it an ideal environment for those who thrive on curiosity and challenging themselves.

The role involves developing mobile applications using Java, Kotlin, and Swift, requiring deep expertise in Android and/or iOS development. You'll be working in a fast-paced, collaborative environment where strong communication skills are essential for sharing knowledge with teammates effectively.

The interview process is well-structured, consisting of an initial CV review and phone interview, followed by four technical interviews: a coding assessment, systems hands-on session, project deep-dive presentation, and team meet-and-greet. The company aims to complete the main interview process within one week.

xAI offers competitive compensation, with salaries ranging from $180,000 to $440,000 USD annually. The company is committed to equal opportunity employment and maintains a fair and inclusive workplace culture. This is an exceptional opportunity for mobile engineers who want to work at the intersection of AI and consumer technology, creating products that will have a meaningful impact on how people interact with artificial intelligence.

Senior Mobile Engineer position at xAI, developing consumer products using AI models and algorithms.

Senior Mobile Engineer

xAI is pioneering AI systems development with a mission to understand the universe and advance human knowledge. The London team specializes in large-scale distributed systems, contributing significantly to projects like the Grok production stack. They work across the full technology stack, from build systems to frontend development.

As a Senior Software Engineer, you'll join a small, highly motivated team that values engineering excellence and operates with a flat organizational structure. The role demands expertise in systems programming languages, Python ecosystem, and distributed systems design. You'll work from the London office, collaborating with team members in California, requiring occasional late meetings and business trips.

The ideal candidate should be an expert in languages like Rust, C++, or Go, have strong Python skills including binding development, and experience with distributed systems and API design. Additional valuable skills include TypeScript, React, Kubernetes, and ML-related technologies like JAX, CUDA, and Triton.

The position offers competitive compensation, equity, health benefits, and a flexible time-off policy. The company culture emphasizes hands-on contribution, initiative-based leadership, and strong communication skills. This is an excellent opportunity for engineers who thrive on solving complex technical challenges and want to be part of a cutting-edge AI company.

Senior Software Engineer position at xAI focusing on distributed systems development, requiring expertise in systems programming and Python ecosystem.

Software Engineer

xAI creates AI systems to understand the universe and aid humanity in pursuit of knowledge.

xAI is an innovative company focused on creating AI systems that can understand the universe and advance human knowledge. As a small, highly motivated team committed to engineering excellence, we're seeking an Outside Plant (OSP) Engineer to join our Fiber Team.

This role is crucial for the design, implementation, and maintenance of fiber optic networks supporting xAI's data center infrastructure. You'll be responsible for developing detailed engineering plans, managing contractors, ensuring regulatory compliance, and maintaining network performance. The position requires expertise in fiber network design, outside plant infrastructure, and construction management.

As an OSP Engineer, you'll work at the intersection of infrastructure and technology, collaborating with various stakeholders to deploy high-performance fiber networks. The role offers unique challenges in designing and implementing critical infrastructure for AI systems, making it an exciting opportunity for someone passionate about building the foundation for advanced technology.

The ideal candidate will bring 3-5+ years of experience in OSP engineering, strong technical skills in fiber optic technologies, and excellent project management abilities. You'll need to be comfortable with both technical design work and field operations, including site surveys and construction oversight.

This position offers the opportunity to work with cutting-edge AI technology infrastructure while contributing to xAI's mission of advancing human knowledge through artificial intelligence. You'll be part of a team that values curiosity, engineering excellence, and innovative problem-solving.

Outside Plant Engineer position at xAI, focusing on fiber optic network design and implementation for AI infrastructure.

Outside Plant (OSP) Engineer

xAI is at the forefront of creating AI systems that push the boundaries of understanding our universe. As a Mechanical Engineer specializing in HVAC and Chilled Water systems, you'll play a crucial role in designing and maintaining the infrastructure that powers our cutting-edge AI facilities. This position offers a unique opportunity to work with a small, highly motivated team focused on engineering excellence.

The role combines technical expertise in mechanical systems with strategic thinking, as you'll be responsible for designing, analyzing, and overseeing advanced HVAC and chilled water systems. You'll work on critical infrastructure that directly impacts the efficiency and reliability of our AI operations. The position requires a deep understanding of thermal management and mechanical systems, along with the ability to collaborate across disciplines.

Your responsibilities will span from leading design meetings and conducting feasibility studies to implementing energy efficiency strategies and ensuring regulatory compliance. You'll be involved in every aspect of mechanical systems, from initial design through construction and ongoing maintenance. This role is ideal for someone who combines technical expertise with project management skills and has a passion for maintaining critical infrastructure.

The ideal candidate will bring 5-7 years of relevant experience, along with a Professional Engineer license and strong educational background. You'll need to be comfortable working in a dynamic environment that may require flexible hours, including evenings and weekends. This position offers the opportunity to work with a forward-thinking company that's pushing the boundaries of AI technology while maintaining crucial physical infrastructure.

Join xAI if you're excited about contributing to groundbreaking AI advancement through your expertise in mechanical engineering. You'll be part of a team that values curiosity, engineering excellence, and innovative thinking, while working on systems that are crucial to the company's mission of understanding the universe and advancing human knowledge.

Design and oversee HVAC and chilled water systems for xAI's cutting-edge AI facilities, ensuring optimal performance and efficiency of critical infrastructure.

Mechanical Engineer (HVAC / Chilled Water)

xAI is pioneering the development of AI systems with the ambitious mission of understanding the universe and advancing human knowledge. As a Member of Technical Staff focusing on Enterprise API and Applied AI, you'll work in a dynamic, flat-structured organization where excellence and initiative are highly valued.

The role combines technical expertise with customer-facing responsibilities, similar to an AI startup CTO. You'll be responsible for end-to-end solution delivery, from understanding customer pain points to implementing LLM-powered software. The position involves system prompt tuning, model fine-tuning, and SDK improvement based on real-world feedback.

We operate with a unique culture where all engineers share the same title and are encouraged to work across multiple areas. The team is small, highly motivated, and focused on engineering excellence. Leadership opportunities are merit-based, awarded to those who consistently deliver outstanding results.

The interview process is thorough and technically focused, consisting of an initial screening followed by four technical interviews, including coding assessment, systems hands-on evaluation, project presentation, and team meet-and-greet. We pride ourselves on a quick, efficient process typically completed within a week.

This role offers an exceptional opportunity to work at the forefront of AI technology while directly impacting customer success. You'll be part of a team that values strong communication, technical excellence, and the ability to navigate ambiguity in a fast-paced startup environment. The position comes with competitive compensation, equity, and comprehensive benefits, making it an attractive opportunity for those passionate about advancing AI technology.

AI Engineer role focused on implementing enterprise API solutions and working directly with customers to deliver high-stakes AI projects.

Member of Technical Staff - Enterprise API Applied AI Engineer

xAI creates magical AI experiences beyond text, enabling understanding and generation of content across various modalities.

xAI is at the forefront of creating revolutionary multimodal AI experiences that transcend traditional text-based interactions. As part of the multimodal team, you'll be instrumental in developing AI systems that understand and generate content across various modalities including image, video, and audio.

The role offers an exciting opportunity to work on cutting-edge research tooling and advance the boundaries of AI research. As a Full Stack Developer, you'll be responsible for prototyping and supporting research applications used internally for developing and testing new capabilities and research ideas. Your work will directly impact the development of next-generation AI technologies.

Based in the vibrant Bay Area, you'll be part of a team that values technical excellence and innovation. The position requires expertise in full-stack development, with a strong foundation in technologies like Python, TypeScript, React, and Rust. You'll be building user-friendly interfaces for data management and visualization, creating research demos, and owning the end-to-end experience of applications.

The role offers a competitive salary range of $180,000 to $4,400,000 USD, reflecting the high-impact nature of the position. The interview process is thorough and includes technical discussions, coding interviews, and a presentation of your past exceptional work, ensuring that we build a team of top-tier talent.

This is an ideal opportunity for someone who is passionate about AI, has strong full-stack development skills, and wants to work on breakthrough technologies that will shape the future of multimodal AI interactions. You'll be working with a team that values code quality, performance, and real-world impact, while having the chance to contribute to some of the most exciting developments in AI technology.

Senior Full Stack Developer role at xAI working on multimodal AI experiences and research tooling

Full Stack Developer

xAI is at the forefront of creating magical AI experiences that transcend traditional text-based interactions, focusing on understanding and generating content across multiple modalities including image, video, and audio. 

As a Data and Infrastructure Engineer on the multimodal team, you'll be instrumental in developing and optimizing critical data pipelines that handle diverse data types. Your work will directly impact the company's ability to process and utilize petabyte-scale multimedia data effectively.

Key responsibilities include building tools for multimedia data acquisition, developing high-throughput data processing systems, and creating efficient data loading pipelines for large-scale training of multimodal models. You'll also be responsible for building visualization and management tools for all in-house datasets.

The ideal candidate brings expert-level experience in developing software for large-scale distributed machine learning systems, with particular expertise in Spark, GPUs, Kubernetes, and JAX (or PyTorch). You should be well-versed in software engineering best practices, including CI/CD, and have a strong commitment to code quality, testing, and performance.

The role offers a competitive salary range of $180,000 - $440,000 USD and is based in the Bay Area, with locations in San Francisco and Palo Alto. The interview process is thorough and includes an initial phone screening followed by four technical interviews, including research discussions, coding interviews, and a presentation of your past work and vision for xAI.

Join xAI to be part of a team that's pushing the boundaries of AI technology and creating the next generation of multimodal AI experiences. Your expertise in data infrastructure will be crucial in building the foundation for revolutionary AI systems that can understand and generate content across multiple modalities.

Data and Infrastructure Engineer role at xAI, focusing on building petabyte-scale data processing systems for multimodal AI applications.

Data and Infrastructure Engineer

xAI develops AI systems to understand the universe and aid humanity in its pursuit of knowledge

xAI is on a mission to create AI systems that can accurately understand the universe and aid humanity in its pursuit of knowledge. As a member of the Human Data team, you'll be instrumental in delivering high-quality data to drive frontier model performance, working closely with post-training and AI tutor teams.

The role offers a unique opportunity to work in a flat organizational structure where initiative and excellence are rewarded. You'll be part of a small, highly motivated team focused on engineering excellence, where engineers are encouraged to work across multiple areas of the company.

Key aspects of the role include architecting and building the data collection platform, implementing end-to-end features, and establishing best practices for a world-class engineering team. You'll work with modern technologies including TypeScript, Python, Rust, React, Express, and PostgreSQL.

The company values strong communication skills and expects all team members to be hands-on contributors. The interview process is thorough and technical, consisting of coding assessments, systems design, and team presentations, all reviewed directly by technical team members rather than recruiters.

What sets this role apart is the opportunity to work on cutting-edge AI systems in a fast-paced, collaborative environment. You'll be contributing directly to innovative solutions that improve model capabilities, evaluation, safety, and alignment. The role offers competitive compensation and the chance to work in the heart of the Bay Area's tech ecosystem.

Join xAI if you're passionate about pushing the boundaries of AI technology, thrive in a hands-on environment, and want to be part of a team that's shaping the future of artificial intelligence.

Build and architect data collection platforms for frontier AI models at xAI, working with cutting-edge technologies to advance AI understanding of the universe.

Member of Technical Staff

xAI is on a mission to create AI systems that can accurately understand the universe and aid humanity in its pursuit of knowledge. As a Member of Technical Staff, you'll join a small, highly motivated team focused on engineering excellence. The organization operates with a flat structure where all employees are hands-on contributors to the company's mission.

The role involves creating cutting-edge consumer products and experiences using xAI's models and algorithms, with the challenge of scaling these solutions to millions of users globally. You'll work in a unique environment where engineers are encouraged to work across multiple areas, fostering a culture of curiosity and continuous learning.

The ideal candidate will bring deep expertise in mobile development, particularly in Android and/or iOS platforms, demonstrated through a strong portfolio. You'll need excellent communication skills to share knowledge effectively with teammates, and thrive in a fast-paced, collaborative environment where initiative and excellence are rewarded with leadership opportunities.

The interview process is thorough and efficient, typically completed within a week, consisting of a phone interview followed by four technical rounds including coding assessment, systems hands-on, project deep-dive, and team meet-and-greet. What sets xAI apart is their direct approach - all applications are reviewed by technical team members, ensuring a fair and competent evaluation of your skills and potential.

With a competitive salary range of $180,000 - $440,000 USD, this role offers an opportunity to work at the forefront of AI technology while contributing to humanity's understanding of the universe. Join xAI if you're passionate about challenging yourself, driven by curiosity, and ready to make a significant impact in the field of artificial intelligence.

Join xAI as a Mobile Engineer to create AI-powered consumer products and scale them to millions of users worldwide.

xAI is an ambitious AI company focused on creating systems to understand the universe and advance human knowledge. As a Member of Technical Staff on the Search & Retrieval team, you'll be at the forefront of developing crucial search infrastructure that powers our AI systems.

The role offers a unique opportunity to work in a flat organizational structure where initiative and excellence are rewarded with leadership opportunities. You'll be part of a small, highly motivated team that values engineering excellence and cross-functional collaboration. The Search & Retrieval team plays a vital role in providing AI systems and end users with instant access to relevant, accurate, and current information.

You'll be building search systems from scratch, working closely with data teams to handle internet-scale datasets, and collaborating with product teams to enhance our AI models' capabilities. The position requires expertise in search indexing, retrieval algorithms, and distributed systems, with a focus on practical implementation and scalable solutions.

The company culture emphasizes hands-on contribution, strong communication, and direct impact on the company's mission. Unlike traditional corporate structures, xAI maintains a technical-first approach where even the application review process is handled directly by technical team members rather than recruiters.

The role is based in the Bay Area, offering a competitive salary range of $180,000 - $440,000 USD. The interview process is streamlined and technical-focused, typically completed within a week, consisting of a phone screening followed by four technical interviews including coding assessment, systems hands-on, project deep-dive, and team meet-and-greet.

This is an ideal opportunity for experienced engineers who are passionate about advancing AI technology and want to work in an environment that values technical excellence, direct contribution, and innovative problem-solving in search and retrieval systems.

Build and optimize search indexing and retrieval systems for AI models at xAI

Member of Technical Staff - Search & Retrieval

xAI is pioneering the development of AI systems aimed at understanding the universe and advancing human knowledge. As a Member of Technical Staff, you'll be part of a small, highly motivated team focused on engineering excellence. The organization maintains a flat structure where all employees are hands-on contributors to the company's mission.

You'll work on leveraging xAI's models and algorithms to create innovative consumer products and experiences, scaling them to serve millions of users globally. The role offers unique opportunities to work across multiple areas of the company, promoting broad technical exposure and growth.

The team values strong communication skills and the ability to share knowledge effectively with teammates. Leadership opportunities are merit-based, awarded to those who demonstrate initiative and consistent excellence. The company emphasizes work ethic and strong prioritization skills.

The technical environment includes working with Python/Scala, optional Rust, gRPC, and various databases including PostgreSQL and SQLite. You'll work with cloud platforms (AWS, Google Cloud, or Azure) and modern development practices including RESTful APIs, microservices architecture, and containerization with Docker.

The interview process is thorough but efficient, typically completed within a week, and includes coding assessment, systems hands-on evaluation, project presentation, and team meet-and-greet. Unlike traditional companies, xAI doesn't use recruiters - all applications are reviewed directly by technical team members, ensuring a more relevant and focused hiring process.

Create next-generation AI consumer products and experiences at xAI, working with cutting-edge models and algorithms to serve millions of users globally.

AI company focused on developing and improving pre-trained models for real-world applications

xAI is at the forefront of AI development, focusing on transforming pre-trained models into practical, steerable, and versatile solutions for real-world challenges. As a Full-Stack Developer in the post-training team, you'll play a crucial role in advancing AI research through improved tooling and infrastructure.

The position offers an opportunity to work on cutting-edge AI technology, developing sophisticated data management and visualization tools, creating model evaluation platforms, and optimizing post-training workflows. You'll be building research demos that explore the frontier of AI products while iterating quickly based on real-world feedback.

The ideal candidate should be an expert full-stack developer with strong experience in Python, TypeScript, React, and Rust. You should be well-versed in software engineering best practices, including CI/CD, and have a deep understanding of post-training workflows such as supervised fine-tuning and reinforcement learning from human feedback.

Located in the San Francisco Bay Area, you'll be part of a technical team that values direct communication and rapid iteration. The interview process is streamlined and technically focused, typically completed within one week, involving coding assessments and technical sessions focused on post-training tooling problems.

With a competitive salary range of $180,000 - $440,000 USD, this role offers an exceptional opportunity to work on transformative AI technology while contributing to the development of tools and platforms that will shape the future of AI applications. Join xAI to be part of a team that's pushing the boundaries of what's possible in AI technology.

Senior Full-Stack Developer role at xAI, focusing on building tools and platforms for AI model post-training, offering competitive compensation in San Francisco Bay Area.

Full-Stack Developer

xAI develops AI systems to understand the universe, create new knowledge, and improve through interactions.

xAI is at the forefront of developing advanced AI systems that aim to understand the universe, create new knowledge, and achieve self-improvement through interactions. As a Post-Training Researcher/Engineer, you'll join the post-training team that transforms powerful pre-trained models into steerable, versatile systems capable of addressing real-world challenges.

The role combines cutting-edge research with practical engineering, focusing on enhancing model instruction-following capabilities and general usefulness. You'll work on creating research agendas, improving data mixtures, developing novel reinforcement learning algorithms, and implementing large-scale training frameworks.

The ideal candidate brings expert-level knowledge in machine learning, particularly in fine-tuning large language models, with a proven track record of impactful AI research. Experience with complex model optimizations, distributed systems, and advanced reinforcement learning is crucial.

Based in the Bay Area, you'll be part of a technical team that values direct interaction and rapid progress. The interview process is thorough yet efficient, designed to evaluate both technical skills and research capabilities, with a focus on exceptional work and vision alignment.

The role offers competitive compensation ranging from $180,000 to $440,000 USD, reflecting the high-impact nature of the position. You'll work with cutting-edge technologies including Python, Jax, and Rust, contributing to xAI's mission of advancing AI capabilities for real-world applications.

Senior ML researcher/engineer position at xAI, focusing on post-training model enhancement and advanced AI system development.

Post-Training Researcher/Engineer

xAI develops and transforms powerful pre-trained AI models to become steerable and capable of addressing real-world challenges.

xAI is at the forefront of transforming pre-trained AI models into versatile, steerable systems capable of tackling real-world challenges. As an AI Infrastructure Engineer, you'll join the post-training team to develop and optimize frameworks for large-scale machine learning tasks, with a focus on reinforcement learning and agent systems.

The role demands expertise in building high-performance, scalable software that pushes the boundaries of AI capabilities. You'll be responsible for creating efficient frameworks for model fine-tuning, reinforcement learning, and large-scale agent simulation. Your work will directly impact the development of synthetic data generation and model-based improvements.

The ideal candidate brings deep expertise in distributed machine learning systems, GPU optimization, and modern ML frameworks like JAX or PyTorch. You'll work with cutting-edge technologies including Python, Rust, and CUDA, while maintaining high standards for code quality and testing.

Based in the vibrant Bay Area tech hub, you'll join a team committed to advancing AI technology. The comprehensive interview process reflects our technical focus, with coding assessments and infrastructure design challenges evaluated directly by our technical team. With a competitive salary range of $180,000 - $440,000 USD, this role offers an opportunity to shape the future of AI technology while working with state-of-the-art systems and frameworks.

The position offers a unique chance to work on breakthrough AI technologies while collaborating with a team of exceptional engineers and researchers. Your contributions will help define the future of AI systems and their applications in solving real-world problems.

Senior AI Infrastructure Engineer role at xAI, focusing on building scalable frameworks for machine learning and reinforcement learning systems.

AI Infrastructure Engineer

xAI creates AI systems to understand the universe and aid humanity in its pursuit of knowledge

xAI is an ambitious AI company focused on creating artificial intelligence systems that can understand the universe and advance human knowledge. As a Member of Technical Staff, you'll join a small, highly motivated team operating with a flat organizational structure where excellence and initiative are rewarded with leadership opportunities.

The role involves working on cutting-edge data processing systems at a massive scale, managing cloud compute clusters, and preparing datasets for AI training. You'll be part of a team that values engineering excellence and encourages cross-functional work across multiple areas of the company.

The ideal candidate will bring strong engineering skills and demonstrated exceptional work in data processing and distributed systems. You'll be working with technologies like Python, JAX, Rust, and Spark to build petabyte-scale systems. The role requires both technical expertise and strong communication skills, as you'll be expected to share knowledge effectively with teammates.

The position is based in the Bay Area, offering a competitive salary range of $180,000 - $440,000 USD. The interview process is thorough but efficient, typically completed within a week, and includes coding assessments, systems hands-on sessions, and project presentations. Unlike other companies, xAI doesn't use recruiters - all applications are reviewed directly by technical team members, ensuring a focus on genuine technical capability and exceptional work.

Join xAI if you're passionate about pushing the boundaries of AI technology, thrive in a flat organizational structure, and want to contribute directly to understanding the universe through advanced AI systems. The role offers the unique opportunity to work on challenging problems with a team that values initiative, excellence, and direct contribution to the company's ambitious mission.

Join xAI as a Member of Technical Staff to build petabyte-scale data processing systems and advance AI technology understanding of the universe.

xAI creates AI systems to understand the universe and aid humanity in its pursuit of knowledge, operating with a flat organizational structure.

xAI is at the forefront of creating AI systems that advance our understanding of the universe and support humanity's quest for knowledge. As our Datacenter Infrastructure Engineer Lead, you'll play a crucial role in designing, deploying, and maintaining our state-of-the-art data center infrastructure. This position combines technical expertise with leadership, requiring deep knowledge of data center engineering including power, cooling, and networking systems.

The role offers unique opportunities to work in a flat organizational structure where initiative and excellence are rewarded. You'll lead a team of infrastructure engineers while collaborating closely with IT, construction, facilities, and operations teams. Your responsibilities will span from infrastructure design and planning to system implementation and capacity management.

The ideal candidate brings 10+ years of data center operations experience, with at least 5 years in leadership. You'll need strong technical credentials, including expertise in electrical and HVAC systems, along with relevant certifications. Your role will be pivotal in ensuring the reliability, scalability, and efficiency of our data center operations.

Working at xAI means joining a small, highly motivated team focused on engineering excellence. You'll be encouraged to work across multiple areas of the company, contributing directly to our mission. The position offers the opportunity to lead major infrastructure projects, implement cutting-edge solutions, and drive innovation in data center operations.

This role is based in Memphis, TN, requiring on-site presence and flexibility for evening and weekend work as needed. You'll be responsible for maintaining compliance with industry standards while promoting a culture of continuous improvement and innovation within your team.

Lead data center infrastructure engineer position at xAI, overseeing design, deployment, and maintenance of state-of-the-art data center facilities in Memphis, TN.

xAI Engineering Jobs

xAI creates AI systems to understand the universe and aid humanity in its pursuit of knowledge.