Open roles in London
Greater London, London, England
- Posted last monthBackend EngineeringRustC++Distributed SystemsAPI DevelopmentxAI
xAI is seeking a Backend Engineer to work on production systems powering their API. The role requires expertise in Rust or C++ and experience with scalable distributed systems. Candidates should have strong communication skills and a passion for engineering excellence.
- Posted last monthAIGovernmentPythonSoftware EngineeringInternationalGrokPublic Sector
xAI is seeking a Member of Technical Staff for its new Grok for Government department in London, UK. The role involves engineering and deploying AI capabilities for international government agencies and public sector workflows worldwide. Candidates must have strong software engineering experience, particularly with Python and AI model fine-tuning, and willingness to travel internationally.
- Posted last monthAIMachine LearningModel TrainingEngineeringxAI
xAI is seeking a Member of Technical Staff for Model Training based in London. The role involves tackling critical modeling challenges within a flat, meritocratic organization. Candidates should be power users of AI models with a passion for truth-seeking AI.
- Posted last monthAIReinforcement LearningDistributed SystemsReasoningEngineering
xAI is hiring a Member of Technical Staff focused on Reasoning to build frameworks for AI reasoning and distributed reinforcement learning systems. The role requires designing and implementing large-scale systems and developing agent environments. Candidates will participate in a multi-stage technical interview process.
- Posted last monthRustC++GoPythonLinuxWindowsContainerizationInfrastructurexAI
xAI is seeking a Member of Technical Staff for the Sandbox Service team within Infrastructure. This role involves building and maintaining secure, scalable systems for model access to computational environments. Candidates need expertise in Rust, C++, or Go, along with deep experience in Linux/Windows systems and containerization.
- Posted last monthBackend EngineeringPaymentsDistributed SystemsRustGoPythonJavaConsumer Applications
xAI is seeking a talented Software Engineer for the X Money team to build a revolutionary global payment network. The role involves backend development, designing microservices, and collaborating on payments and fraud detection. Candidates should have experience with distributed systems and large-scale consumer applications.
- Posted last monthAndroidKotlinJetpack ComposeMobile EngineeringAILondon
xAI is seeking an exceptional Android engineer to join a small, high-impact team dedicated to creating the world's most valuable AI application. The role requires proficiency in Kotlin, Jetpack Compose, and reactive programming, along with strong product sense and technical excellence.
- $180,000 – $440,000Posted last monthiOSSwiftSwiftUIUIKitPerformance OptimizationAPI IntegrationRustAVFoundationMobile DevelopmentAI
xAI is hiring a Mobile iOS Engineer in London to build cutting-edge AI mobile applications. The role requires expert Swift skills and focuses on performance and user experience. Candidates will work on a small, high-impact team with competitive compensation.
- Posted last monthSite Reliability EngineerKubernetesBackend ServicesCI/CDInfrastructure as CodeMonitoringCloudAPI
xAI is seeking a Site Reliability Engineer to work on backend services powering products like grok.com and the API. The role involves maintaining highly scalable and reliable services hosted on Kubernetes clusters. Candidates must have expert knowledge of Kubernetes, CI/CD systems, monitoring technologies, and infrastructure as code.