xAI

SpaceXAI is seeking skilled Electricians to join its internal construction and electrical teams, supporting the rapid build-out of its data centers. This is a traveling role where you will mobilize with project teams to active construction sites, install and commission mission-critical electrical systems, and move with the work as new facilities come online. You will work on high-voltage and medium-voltage power distribution, backup power systems, grounding, lighting, and process power in a fast-paced, high-stakes environment where uptime and safety are paramount. This hands-on position is ideal for experienced electricians who thrive in industrial or data-center settings, enjoy project-based travel, and want to contribute directly to groundbreaking AI infrastructure.

SpaceXAI is seeking skilled Journeyman and/or Master Electricians to join our internal construction team, focusing on the rapid build-out of our data centers. This is a traveling role where you will mobilize with project teams to active construction sites, install and commission mission-critical electrical systems, and relocate with the work as new facilities come online. You will work on high-voltage and medium-voltage power distribution, backup power systems, grounding, lighting, and process power in a fast-paced, high-stakes environment where uptime and safety are paramount. This hands-on position is ideal for experienced electricians who thrive in industrial or data-center settings, enjoy project-based travel, and want to contribute directly to groundbreaking AI infrastructure.

SpaceXAI is seeking skilled Electricians to join its internal construction and electrical teams, supporting the rapid build-out of data centers. This is a traveling role where you will install and commission mission-critical electrical systems on active construction sites, working with high-voltage and medium-voltage power distribution, backup power, grounding, lighting, and process power in a fast-paced, high-stakes environment. This hands-on position is ideal for experienced electricians who thrive in industrial or data-center settings, enjoy project-based travel, and want to contribute directly to groundbreaking AI infrastructure.

SpaceXAI is seeking a team-oriented Barista who is familiar with basic customer service and food/beverage safety principles. This role involves supporting customer orders, inquiries, and deliveries, as well as maintaining food service spaces. The Barista will contribute to the company's mission by providing quality customer service and a welcoming atmosphere, ultimately boosting morale and productivity. The ideal candidate is hands-on, curious, and thrives in a challenging environment with a flat organizational structure, valuing initiative and consistent excellence.

X Ads is a high-leverage product area at X, focused on rebuilding its platform with modern infrastructure and AI at its core. This is an opportunity to join a small, fast-moving team where engineers can take on significant ownership, learn from experienced colleagues, and ship impactful products. The role involves working across product, backend systems, infrastructure, and AI-powered features that directly influence a substantial portion of X's revenue. We are seeking high-slope software engineers eager to transform the X Ads Platform using SpaceXAI's infrastructure and AI stack, particularly those early in their careers who learn quickly, ship fast, and are excited to understand and improve large-scale advertising systems with AI.

$150k - $350k

SpaceXAI is seeking a Site Reliability Engineer focused on campus reliability to design and implement systems that ensure the availability and trustworthiness of our campus infrastructure. This role involves technically leading cross-discipline incident responses and building mechanisms to minimize future incidents. You will act as the central point of contact across compute, network, storage, power, and cooling systems, requiring strong incident leadership, fleet-scale observability expertise, and the ability to drive reliability improvements across both software and facility domains.

SpaceXAI is seeking a Senior Analyst for Child Safety Operations to help train and refine Grok, an AI system, to enforce terms of service and support functions. This role is crucial for enhancing the safety of our products, X, and Grok by minimizing existential risks, enforcing rules, and promoting responsible AI development to prevent illegal and harmful content. The ideal candidate will be hands-on, curious, and possess strong prioritization and communication skills, contributing directly to the company's mission in a flat organizational structure.

SpaceXAI is seeking a Safety Operations Senior Analyst focused on Child Safety to join their mission of creating AI systems that understand the universe and aid humanity. In this role, you will be instrumental in training and refining Grok to enforce terms of service and support functions, directly impacting the safety of products like X and Grok. Your work will focus on minimizing existential risks, enforcing SpaceXAI's rules, and promoting responsible AI development to prevent illegal and harmful content.

$62k - $75k

SpaceXAI is seeking an experienced Mechanical Commissioning Lead to oversee the buildout, startup, and handover of mechanical systems for their high-performance data centers. This senior, hands-on leadership role involves directing commissioning, testing, troubleshooting, and turnover of critical cooling, air handling, and fluid distribution systems essential for next-generation AI supercomputing infrastructure. You will lead a team of commissioning technicians and collaborate closely with construction, engineering, operations, contractors, and vendors to ensure the delivery of safe, reliable, and high-quality mechanical systems. This is a full-time, onsite position requiring extensive travel to data center construction sites across the United States.

SpaceXAI is seeking a Security Engineer to lead day-to-day security threat management. This role involves identifying and managing potential incidents, collaborating with partner teams on security threats, and supporting threat intelligence, threat hunting, intrusion detection, and incident response efforts. The ideal candidate will help advance best practices in these areas and contribute to the company's mission of creating AI systems that understand the universe.

The Sandbox service team at SpaceXAI builds and maintains a secure, scalable system that gives our models safe, controlled access to computational environments. This infrastructure powers critical workloads across training and product, enabling models to run code, build software, interact with tools, and even control applications with user interfaces. We provision containers and virtual machines on large-scale clusters, granting models interactive control over these remote environments. Our work spans the full stack: from orchestrating massive jobs and resource scheduling at the cluster level, to fine-tuning filesystem performance on nodes. The Sandbox service enables Grok to safely run and test code in real-time for user queries, and supports reinforcement learning in training, where models interactively explore tools ranging from compilers to productivity apps.

£107k - £262k

SpaceXAI is seeking an engineer to join the RL infrastructure team to help develop our RL training framework. The team is small, highly motivated, and focused on engineering excellence, operating with a flat organizational structure where all employees are expected to be hands-on and contribute directly to the company's mission. This role requires strong initiative, curiosity, work ethic, prioritization, and communication skills.

$180k - $440k

The Data Platform team builds and operates the infrastructure responsible for all large-scale data transport and processing across the company. We own and manage core systems including Apache Kafka, HDFS, Spark, Flink, and Trino, enabling real-time ML pipelines, feed ranking, experimentation, analytics, and observability at petabyte scale. Our team deals with latency-critical workloads, high-throughput streaming, and distributed compute systems that require fault tolerance, performance, and absolute reliability. As a software engineer on the Data Platform team, you will design, build, and operate the distributed systems powering SpaceXAI's data movement and compute. You will take ownership of infrastructure components that process trillions of events daily, driving the scalability, performance, and reliability of the systems that power product and ML workloads across the company.

$180k - $440k

SpaceXAI's mission is to create AI systems that can accurately understand the universe and aid humanity in its pursuit of knowledge. The RL infrastructure team is looking for an engineer to help with low precision RL training and inference. This role involves designing and optimizing the inference stack for all shapes of RL workloads, analyzing and addressing performance bottlenecks in large-scale RL systems, and working closely with the modeling team to efficiently implement novel RL techniques and algorithms.

$180k - $440k

SpaceXAI is seeking a Member of Technical Staff to join their multimodal team and advance the understanding and generation of AI across image, video, audio, and text. This role involves working across the full stack, from data curation and pre-training to alignment, infrastructure, and end-to-end product experiences. You will collaborate with various teams to deliver cutting-edge multimodal reasoning, world modeling, tool use, agentic behaviors, and human-AI collaboration capabilities. The goal is to build models that can perceive, reason about, and interact with the world in real-time at an unprecedented level.

$180k - $440k

The Imagine team is redefining AI-driven media experiences for Grok users worldwide. As a Product Safety Engineer on the Imagine team, you will build the critical safety systems and infrastructure that ensure Grok’s multimodal generation capabilities (images, video, audio, and beyond) are powerful, delightful, and responsibly deployed. You’ll design and scale safeguards, detection systems, and evaluation frameworks that prevent harm while preserving creativity and user freedom. Your work will directly shape how millions of users experience generative media — balancing rapid innovation with rigorous safety, trustworthiness, and alignment with SpaceXAI's mission. If you’re a driven engineer passionate about AI safety, content integrity, and building robust systems that protect users without stifling innovation, this is your opportunity to make a lasting impact at the frontier of multimodal AI.

$180k - $440k

SpaceXAI is seeking exceptional storage & database engineers to join a new project focused on deeply integrating advanced AI infrastructure into a platform used by millions of users monthly. The team is building a new storage tier to power training, inference, recommendations, and real-time data extraction. This involves developing and operating an exabyte-scale S3-compatible object store, a multi-tenant transactional key/value store serving hundreds of millions of requests per second, a caching tier serving billions of requests per second, a scalable vector database for recommendation systems, and other specialized databases.

$180k - $440k

SpaceXAI is seeking a multimodal engineer for the Imagine Model Team to develop cutting-edge AI experiences beyond text, focusing on high-fidelity understanding and generation across image and video modalities, with audio integration where it enhances visual content. Responsibilities cover data curation, modeling, training, inference serving, and product integration across pretraining and post-training phases. The role involves close collaboration with product teams to advance model frontiers and deliver exceptional end-to-end user experiences.

$180k - $440k

SpaceXAI is seeking a skilled AI Humanities Specialist to enhance its AI models, specifically Grok, by providing high-quality data annotations and inputs tailored to humanities contexts. This role involves leveraging expertise in fields like linguistics, history, classical studies, literature, poetry, philosophy, ethics, visual arts, and performing arts to train Grok. The specialist will evaluate model outputs and create training data to ensure Grok reasons accurately, weighs evidence carefully, and communicates uncertainty honestly, with a focus on scholarly judgment.

SpaceXAI is seeking a Mechanical Commissioning Engineer to manage the buildout, startup, and handover of mechanical systems for their high-performance data centers. This is a hands-on role focused on commissioning, testing, and troubleshooting critical cooling, air handling, and fluid distribution systems that support next-generation AI supercomputing infrastructure. You will collaborate with construction, engineering, operations, contractors, and vendors to ensure the delivery of safe, reliable, and high-quality mechanical systems. This is a full-time, onsite position requiring travel to data center construction sites across the United States.