Role Description We are looking for a highly experienced and technically strong Senior IT Infrastructure & Systems Engineer to manage, maintain, and enhance the organization’s complete IT infrastructure environment. The ideal candidate should have hands-on expertise in enterprise infrastructure architecture, virtualization, server management, network operations, security implementation, and system administration across Windows and Linux environments. The candidate will play a critical role in ensuring high availability, security, scalability, and performance of the company’s IT systems while supporting business continuity and operational efficiency. Responsibilities - Design, implement, maintain, and optimize enterprise IT infrastructure. - Manage physical and virtual server environments across multiple locations. - Administer Windows and Linux servers, ensuring high availability, performance, and scalability. - Perform capacity planning, resource allocation, system upgrades, migrations, and server lifecycle management. - Administer Active Directory, including Domain Controllers, DNS, DHCP, Group Policy (GPO), and Organizational Units (OUs). - Manage user provisioning, permissions, authentication, and access control. - Implement identity and access management best practices. - Deploy, manage, and troubleshoot VMware environments. - Manage virtual machines, storage, snapshots, and resource allocation. - Optimize virtualization performance and support high-availability and disaster recovery environments. - Administer Windows Server roles and services. - Manage Linux systems using command-line tools and shell scripting. - Configure services, file systems, permissions, scheduled tasks, and troubleshoot OS, hardware, and application issues. - Monitor and troubleshoot LAN/WAN connectivity and network performance. - Support firewall, VPN, switch, and router configurations. - Manage endpoint protection, patching, vulnerability remediation, and infrastructure security. - Ensure data protection, backup integrity, and compliance with IT security policies. - Manage backup and recovery solutions for critical systems. - Monitor system health, logs, alerts, and server performance. - Develop, maintain, and test disaster recovery and business continuity plans. - Provide Level 2 and Level 3 infrastructure support. - Troubleshoot server, network, hardware, and software issues. - Coordinate with vendors for procurement, maintenance, and technical support. - Support enterprise IT operations across office and server environments. - Maintain technical documentation, infrastructure diagrams, and SOPs. - Prepare infrastructure reports and support IT audits. - Ensure compliance with organizational IT standards and security policies. Qualifications - Bachelor's degree in Computer Science, Information Technology, or a related field. - Minimum 5 years of experience in IT infrastructure, systems administration, or enterprise IT operations. Technical Skills - Enterprise IT infrastructure architecture. - Windows Server administration. - Linux administration and shell commands. - VMware and virtualization technologies. - Active Directory, DNS, DHCP, Group Policy, and domain environments. - Server-client architecture. - Infrastructure monitoring tools. - Backup and disaster recovery solutions. - Firewall, endpoint security, and system hardening. - Hardware troubleshooting and server maintenance. - Network troubleshooting and system diagnostics. Preferred Qualifications - VMware, Microsoft, Linux, or networking certifications. - Experience with cloud infrastructure and hybrid environments. - Knowledge of cybersecurity frameworks and IT governance standards. - Experience supporting enterprise or multi-branch IT environments. Remote Module - Flexible hours.

Role Description vLLM is growing at a fast pace, and every bit of that growth lands on the CI system. More models, more hardware, more contributors, more ways for things to break. Your job is to make sure none of that slows anyone down. - Maintain and scale the compute infrastructure that powers CI, release, performance benchmark, accuracy evaluation for vLLM project, across a wide range of models and accelerators including H100/H200, (G)B200/300, AMD MI325/355X, TPU, Intel Gaudi, etc. - Get creative about cutting CI time-to-signal from hours to minutes. - Make sure every corner of vLLM code base is well-tested. - Keep vLLM releases rock-solid. - Build out tooling that helps 3,000+ vLLM contributors move fast. Qualifications - Strong experience with Docker, Kubernetes, and containerized build or test environments. - Built CI/CD pipelines from scratch using GitHub Actions, Buildkite, or similar systems. - Familiar with CI design patterns and CI techniques: compute orchestration, handling flaky tests, dependency/environment management, caching, remote execution, test target determination, etc., test coverage, and so on. - Fluent in Python, Bash, Go, or similar for automation and tooling. - Solid fundamentals of Linux, security, networking, storage, package management. Requirements - Bonus points for setting up infrastructure for ML, inference, CUDA, ROCm, or accelerator-heavy workloads. - Running Buildkite at scale, including agents, queues, dynamic pipelines, test sharding, caching, and artifact management. - Operating Kubernetes clusters for CI, batch jobs, test execution, or internal developer infrastructure. - Managing CI/CD in large open-source project. - Building dashboards, alerts, runbooks, or tooling for CI observability. Benefits - Generous health, dental, and vision benefits. - 401(k) company match.

Role Description We are looking for a Core Systems Engineer with a deep mastery of Rust to design, build, and optimize Sequen’s underlying model serving infrastructure and real-time performance engines. This role sits at the absolute core of our technical strategy. You will be responsible for ensuring our frontier ranking and recommendation APIs process petabyte-scale data and compute complex inference logic with ultra-low latency. You will replace high-overhead bottlenecks with elegant, production-grade Rust systems, building a reliable foundation that scales alongside our rapid enterprise customer growth. Responsibilities: - Optimize Real-Time Infrastructure: - Write high-performance, memory-safe, and concurrent production code in Rust. - Optimize model serving infrastructure to achieve ultra-low inference latency under heavy concurrent request loads. - Build low-latency data ingestion systems, microservices, and network protocols to process real-time behavioral streams. - Develop Core Architectural Tooling: - Design and maintain robust, high-throughput backend APIs and SDKs. - Implement customized abstractions, caching layers, and memory management profiles to maximize hardware efficiency. - Migrate data-heavy bottlenecks from higher-overhead languages into highly optimized Rust components. - Ensure Reliability and Scale: - Own the end-to-end lifecycle of core backend infrastructure components. - Debug complex distributed system deadlocks, race conditions, and production bottlenecks across cloud environments. - Establish rigorous performance benchmarking, regression testing, and real-time system monitoring. - Collaborate on Product Evolution: - Partner directly with Applied Scientists to translate recent neural network and ranking model breakthroughs into highly scalable runtime realities. - Define best practices for building secure, scalable, and deterministic system architectures across our entire engineering organization. Qualifications - 6 to 8+ years of experience in Software Engineering, Systems Programming, Infrastructure Engineering, or similar. - Strong professional experience writing and deploying production-grade Rust code in high-scale systems. - Deep understanding of Rust-specific primitives, including ownership, lifetimes, concurrency models, and asynchronous runtimes like Tokio. - Experience building robust backend systems, custom APIs, and event-driven architectures. - Experience debugging, profiling, and operating high-throughput production systems under strict real-world constraints. - Comfort with ambiguity, a strong sense of technical ownership, and an ability to balance engineering speed with quality. Requirements - Experience working with cloud platforms like AWS, GCP, or Azure and container orchestration tools like Docker and Kubernetes. - Experience implementing machine learning model inference optimizations, vector search databases, or large-scale data pipelines. - Background in early-stage startups or fast-moving, high-growth technical environments. Benefits At this stage, the efficiency and speed of our core infrastructure directly dictate how our product performs for global-scale consumer enterprises. You will have a blank canvas to architect core systems, work with bleeding-edge AI workflows, and fundamentally define the technical scalability of the company.

• Automate cloud infrastructure provisioning using Terraform and Ansible, writing IaC that supports Simple, Secure, and Scalable deployments • With an emphasis on networking, directly support platform engineering partners and application development teams in troubleshooting, provisioning and maintaining various enterprise infrastructure • Architect, optimize, and maintain secure network infrastructure in Azure, AWS, & GCP • Configure and manage virtual networks and subnets, including IP addressing, routing, firewall rules, and load balancing • Collaborate with security teams to enforce Zero Trust networking, IAM, and data encryption standards, as well as general security framework adherence • Through IPAM, maintain a network topology that provides for integration testing among development teams while remaining flexible enough to unify additional environments as merger and acquisition requires • Solution and implement Direct Connect, Express Route, and VPN technologies to establish secure, reliable and resilient connections • Work closely with Security and Compliance to ensure security framework adherence (SOC2, Hi-Trust, FEDRAMP etc.) • Provide self-service infrastructure governance and automation for the development teams, enabling them to focus on delivering business value as efficiently as possible