Senior SRE, Infrastructure & Platform

Skip to main contentCareers at F5Sign InSenior SRE, Infrastructure & Platform page is loadedSenior SRE, Infrastructure & PlatformApplyremote typeHybridlocationsSingapore Officetime typeFull timeposted onPosted 30+ Days Agojob requisition idRP1037136At F5, we strive to bring a better digital world to life. Our teams empower organizations across the globe to create, secure, and run applications that enhance how we experience our evolving digital world. We are passionate about cybersecurity, from protecting consumers from fraud to enabling companies to focus on innovation.  Everything we do centers around people. That means we obsess over how to make the lives of our customers, and their customers, better. And it means we prioritize a diverse F5 community where each individual can thrive.F5 is bringing a better digital world to life by helping organizations create, secure, and run applications that power our lives. Within the Platform Engineering team, this role helps ensure our platform is operated safely, reliably, and with operational excellence.  We are looking for a Senior Site Reliability Engineer that leads with kindness, and possesses a strong software development background to join our Infrastructure Engineering team. Your primary focus will be building automation, tooling, and internal platforms that enable our team to operate a global, multi-datacenter infrastructure spanning a growing number of Points of Presence across the globe. Deep familiarity with production infrastructure -- bare-metal hypervisors, containerized workloads, Kubernetes clusters, and cloud platforms -- is essential, but your primary lens should be on automation and code.  You will develop internal tools and APIs in Python and Go, design and maintain Ansible automation across hundreds of hosts, build CI/CD pipelines, and create self-service interfaces that reduce toil and eliminate manual operations. You will work within a PCI-DSS compliant environment and participate in a 24x7 on-call rotation. What You'll Do Internal Tooling & Application Development Design and develop internal tools, CLIs, and APIs (primarily in Go and Python) that enable infrastructure self-service, automate complex workflows, and improve operational efficiency Build integrations between infrastructure systems -- connecting CMDB/IPAM (NetBox), secrets management (HashiCorp Vault), hypervisor APIs (Proxmox), monitoring platforms, and CI/CD pipelines into cohesive automated workflows Develop and maintain API clients and libraries for interacting with infrastructure services (Proxmox API, Vault API, NetBox API, iLO Redfish, container registries) Write well-tested, documented, and maintainable code with proper versioning, release processes, and code review practices Infrastructure as Code & Ansible Development Architect, develop, and refactor Ansible roles and playbooks across a large-scale inventory spanning 30+ datacenters, 80+ group variable files, and 40+ roles Design reusable, composable Ansible role patterns that scale cleanly as the DC footprint grows -- new DCs should be deployable with minimal variable additions Improve idempotency, error handling, and test coverage across the existing Ansible codebase Develop custom Ansible modules, plugins, and lookup plugins where upstream modules may be insufficient (e.g., custom Vault integration, Proxmox API interactions, iLO automation) Automate bare-metal server lifecycle end-to-end: from iLO bootstrap through OS installation, hypervisor configuration, VM provisioning, and service deployment CI/CD Pipeline Engineering Design, write, and maintain GitLab CI pipelines for infrastructure automation, including multi-stage deployment workflows with linting, validation, canary testing, and regional rollout Build pipeline patterns for safe infrastructure changes: staged rollouts, automated rollback, drift detection, and change validation Create reusable pipeline templates and shared CI components that standardise how infrastructure changes...