Karthik R.

I help businesses keep their servers, cloud, email and databases running smoothly and fix things fast when they break. Hi, I'm Karthik. For 9+ years I've been managing complete IT infrastructure for clients around the world: building and administering Windows and Linux servers, running cloud environments on AWS, Azure, OCI and Alibaba Cloud, looking after SQL Server and Oracle databases, and supporting the people who rely on them every day. I'm Top Rated on Upwork with 90+ completed jobs, and many of my clients come back for ongoing support. WHAT I CAN DO FOR YOU • Server build & administration — Windows Server, Ubuntu/Linux, IIS, Apache, Nginx; setup, hardening, patching and day-to-day management • Cloud management — AWS, Azure, Oracle Cloud (OCI) and Alibaba Cloud: VMs, networking, storage, backups and cost control • Database administration — Microsoft SQL Server 2016/2019 (Standard & Enterprise) and Oracle 12c, 19c and 21c: installation, configuration, tablespace and datafile management, backups, performance tuning and migrations • Virtualization — Hyper-V and Proxmox environments, VM builds, migrations and capacity planning • Firewall & VPN — FortiGate firewall and VPN configuration, OpenVPN on Synology NAS, secure remote access • Domains, DNS & Cloudflare — complete domain infrastructure, DNS and mail record management, SSL, domain transfers • Microsoft 365 & Google Workspace — tenant setup and recovery, Exchange, mail server administration, SPF/DKIM/DMARC and email deliverability • Migrations — server-to-server, on-prem to cloud, hosting moves, and email migrations between Microsoft 365, Google Workspace and cPanel • Backup & disaster recovery — backup design, scheduled backups, restore testing and recovery planning • Monitoring & automation — Zabbix monitoring and alerting, PowerShell and scripted workflows that remove manual work • End-user support — friendly, patient troubleshooting for users and teams RECENT HIGHLIGHTS • Migrated Microsoft Project Online (PWA) to Project Server Subscription Edition — a complex migration completed through automated PowerShell scripts • Built an internal IT monitoring tool for tracking infrastructure health, developed with AI-assisted tooling • Automated DNS record updates, cutting a repetitive manual task down to a single run • Recovered a locked-out Microsoft 365 tenant and set up a fresh, secure M365 environment on a new domain HOW I WORK I start by understanding the problem properly, then explain the fix in plain language before I touch anything. I document what I change, I respect your production environment, and I stay with the issue until it's truly resolved not just patched. WHAT CLIENTS SAY "Karthik was an exceptional Upworker to deal with. He was responsive, communicative, knowledgeable and proactive at solving my urgent technical issue (my businesses website was down for an unknown reason) and I wouldn't hesitate to recommend him to anyone else seeking an excellent technical support specialist." "Karthik went above and beyond to progress with a very difficult issue in a very short period of time. He is kind, hard-working, and knowledgeable." If something in your infrastructure is slowing you down, send me a message with what's going on. I'll share how I'd approach it happy to help. Thanks, Karthik