L3 Server Infrastructure Lead (Unix/Linux)

About Gruve Gruve is an innovative software services startup dedicated to transforming enterprises to AI powerhouses. We specialize in cybersecurity, customer experience, cloud infrastructure, and advanced technologies such as Large Language Models (LLMs). Our mission is to assist our customers in their business strategies utilizing their data to make more intelligent decisions. As a well-funded early-stage startup, Gruve offers a dynamic environment with strong customer and partner networks. About the Role We are looking for an experienced Unix/Linux Compute Subject Matter Expert to provide L3 technical leadership and operational ownership for a global estate of Unix/Linux server instances. The SME will be accountable for infrastructure stability, availability, security and performance, and will own patching, vulnerability remediation, lifecycle management and continuous improvement across the environment. Working within a follow-the-sun model spanning APAC, EMEA and NLAM, the role guides L1/L2 teams and partners closely with Security, Database, Storage, Network, Cloud and Application teams to deliver a consistent, high-quality service. Key Roles and Responsibilities Administer and troubleshoot RHEL, SUSE (SLES), and Ubuntu. Provide L3 technical support for P1–P4 incidents and complex OS-level issues. Lead and technically guide L1/L2 Unix/Linux operations teams across global regions. Own OS patching, patch compliance and vulnerability remediation. Perform CIS hardening and security baseline remediation. Manage OS performance and capacity, including filesystem, CPU, memory and I/O issues. Support server build, configuration, lifecycle and decommissioning activities. Drive problem management, root cause analysis (RCA) and permanent corrective actions. Support monitoring, disaster recovery (DR) activities and operational readiness. Develop and maintain operational runbooks, procedures and technical documentation. Identify and implement automation opportunities to improve operational efficiency. Collaborate with Security, Database, Storage/Backup, Network, Cloud and Application teams. Ensure consistent service delivery through the APAC–EMEA–NLAM follow-the-sun operating model. Basic Qualifications 7–8+ years of experience in enterprise Unix/Linux infrastructure and production operations. Strong hands-on experience with SUSE Linux Enterprise Server (SLES) administration, patching and troubleshooting and Red Hat RHCSA / RHCE Hands-on experience managing Linux workloads on Cloud Infrastructure (AWS, Azure or GCP), including compute instances, networking, storage and cloud-based patching/security. Expert knowledge of one or more of: RHEL, Ubuntu. Strong troubleshooting skills across OS, filesystem, process, performance and system services. Experience with OS patching, vulnerability remediation and CIS hardening. Strong knowledge of LVM, NFS, SSH, DNS, filesystem management, package management and cron.