Senior Reliability Engineer Jobs in Tennessee (NOW HIRING)

Job Summary:
xAI’s mission is to create AI systems that can accurately understand the universe and aid humanity in its pursuit of knowledge. They are seeking a highly skilled Sr. Software Engineer to manage and enhance reliability across a multi-data center environment, focusing on automating processes and building robust observability solutions for mission-critical AI infrastructure.
Responsibilities:
• Design, develop, and deploy scalable code and services (primarily in Python and Rust, with flexibility for emerging languages) to automate reliability workflows, including monitoring, alerting, incident response, and infrastructure provisioning. We value adaptability to new tools and paradigms in the fast-evolving AI space.
• Implement and maintain observability tools and practices, such as metrics collection, logging, tracing, and dashboards, to provide real-time insights into system health across multiple data centers—open to innovative stacks beyond traditional ones like ELK.
• Collaborate with cross-functional teams—including software development, network engineering, site operations, and facility operations (critical facilities, mechanical/electrical teams, and data center infrastructure management)—to identify reliability bottlenecks, automate solutions for fault tolerance, disaster recovery, capacity planning, and physical/environmental risk mitigation (e.g., power redundancy, cooling efficiency, and environmental monitoring integration).This role encourages broad skill sets from diverse technical backgrounds to foster innovation.
• Troubleshoot and resolve complex issues in data center environments, including hardware failures, environmental anomalies, software bugs, and network-related problems, while adhering to reliability principles like error budgets and SLAs.**Key Insight:** By applying SWE rigor to troubleshooting, team members can create reusable diagnostic tools that accelerate resolution, turning unscheduled events (e.g., hardware faults) into opportunities for system hardening and reducing overall end-user impact through targeted SLAs that prioritize critical AI services. We seek versatile problem-solvers who adapt to bleeding-edge challenges.
• Optimize Linux-based systems for performance, security, and reliability, including kernel tuning, container orchestration (e.g., Kubernetes or emerging alternatives), and scripting for automation.
• Understand network topologies and concepts in large-scale, multi-data center environments to effectively troubleshoot connectivity, routing, redundancy, and performance issues; integrate observability into data center interconnects and facility-level controls for rapid diagnosis and automation.**Key Insight:** In multi-site setups, network insights allow for automated failover mechanisms that handle both digital and physical disruptions, ensuring seamless continuity for end-users during events like fiber cuts or power outages. This attracts candidates from varied networking and systems backgrounds to drive forward-thinking solutions.
• Participate in on-call rotations, post-incident reviews (blameless postmortems), and continuous improvement initiatives to enhance overall site reliability, including joint exercises with facility teams for physical failover and recovery scenarios. We prioritize growth-minded individuals who embrace evolving practices.
• Mentor junior team members and document processes to foster a culture of automation, knowledge sharing, and adaptability to new technologies.
Qualifications:
Required:
• Bachelor's degree in Computer Science, Computer Engineering, Electrical Engineering, or a closely related technical field (or equivalent professional experience).
• 3+ years of hands-on experience in site reliability engineering (SRE), infrastructure engineering, DevOps, or systems engineering, preferably supporting large-scale, distributed, or production environments.
• Strong programming skills with proven production experience in Python (required for automation and tooling); experience with Rust or willingness to work in Rust is a plus, but strong coding fundamentals in at least one systems-level language (e.g., Python, Go, C++) are essential.
• Solid experience with Linux systems administration, performance tuning, kernel-level understanding, and scripting/automation in production environments.
• Practical knowledge of containerization and orchestration technologies, such as Docker and Kubernetes (or similar systems).
• Experience implementing observability solutions, including metrics, logging, tracing, monitoring tools (e.g., Prometheus, Grafana, or alternatives), alerting, and dashboards.
• Familiarity with troubleshooting complex issues in distributed systems, including software bugs, hardware failures, network problems, and environmental factors.
• Understanding of networking fundamentals (TCP/IP, routing, redundancy, DNS) in large-scale or multi-site environments.
• Experience participating in on-call rotations, incident response, post-incident reviews (blameless postmortems), and reliability practices such as error budgets or SLAs.
• Ability to collaborate effectively with cross-functional teams (software engineers, network teams, site/facility operations, mechanical/electrical teams).
Preferred:
• 5+ years of experience in SRE or infrastructure roles, ideally in hyperscale, cloud, or AI/ML training infrastructure environments with multi-data center setups.
• Hands-on experience operating or scaling Kubernetes clusters (or equivalent orchestration) at large scale, including automation for provisioning, lifecycle management, and high-availability.
• Proficiency in Rust for systems programming and performance-critical components.
• Direct experience integrating software reliability tools with physical data center infrastructure (e.g., power, cooling, environmental monitoring, facility controls) and automating responses to physical events.
• Exposure to advanced or innovative observability stacks beyond traditional tools (e.g., exploring cutting-edge alternatives for metrics, logs, and tracing).
• Experience building automated remediation, fault tolerance, disaster recovery, capacity planning, or predictive failure detection systems.
• Background in optimizing Linux-based systems for AI workloads, GPU clusters, or high-throughput compute environments.
• Demonstrated success reducing downtime, MTTR, or improving resource efficiency (e.g., through automation or observability) in high-stakes production settings.
• Prior work with bare-metal provisioning, data center interconnects, or hybrid/multi-site failover mechanisms.
• Mentoring experience, strong documentation skills, and a track record of fostering knowledge sharing and automation culture.
• Comfort with rapid technology adaptation in fast-evolving domains like AI infrastructure.
Company:
XAI is an artificial intelligence startup that develops AI solutions and tools to enhance reasoning and search capabilities. It is a sub-organization of SpaceX. Founded in 2023, the company is headquartered in Palo Alto, USA, with a team of 1001-5000 employees. The company is currently Late Stage.