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I have 16 years of experience in Linux administration. I supported more than 475 online web-projects. - Server/Website/Apps - Deploy/Backup/Migration/Troubleshooting/Monitoring - Website support: WordPress, Opencart, ModX, Joomla, Laravel, PHP, Html etc. - Hosting panel support: Cpanel, Cloudpanel, Plesk, Directadmin, Cyberpanel, CWP etc. - Cloud providers: AWS, GCloud, Azure, IBM Cloud, Oracle Cloud, Linode, Vultr, Digital Ocean etc. - Linux maintenance/troubleshooting: Ubuntu, Debian, CentOS - Apache2 + Nginx, Nginx + PHP-fpm, Openlitespeed, MySQL, Memcached. - Linux: Bash, Iptables, rsync, Bind, Exim. - VPN: OpenVPN, Wireguard, PPTP, etc. - VPS providers: Contabo, OVH, GoDaddy, Namecheap, Hostinger, Hetzner, Layerstack etc. Now I open to new interesting projects, contacts. Welcome!

As an expert System Administrator, I provide the best technical solutions for clients' business needs. I help choose the best architecture, deploy and configure it, or optimize an existing one - regardless of its size, from a single small Linux or Windows Server VPS to a complex workload in the AWS environment. My clients count on me for scaling, security, network administration, migrations, discovering and documenting existing infrastructure, and cost management. I also provide ongoing support with server management. I focus on the client experience and do my best to make it outstanding. My advantage is my cross-layer experience: • If a page takes 40 seconds to load, I can trace the problem through the application, web server, OS, network, database, and storage instead of guessing at one layer. • When I plan a cloud infrastructure, I consider not only AWS Well-Architected Framework, but also the application and OS fundamentals themselves. Combined with deep operational and business experience and the ability to learn unfamiliar systems quickly, this helps me build solutions that fit the actual business. A few examples: • Migrated a complex WordPress environment from Amazon Web Services to Vultr after 4+ months of failed attempts: used Terraform, Ansible, and Cloudflare Workers. The migration was completed in 1 week. • Reduced PostgreSQL query times from 40-80 seconds to 0.4-2 seconds on a 35 GB / 31M-record dataset: used query optimization, indexing, materialized views, and PostgreSQL tuning. • Reduced WordPress/server response times from 5-9 seconds to 0.8-1.2 seconds: fixed ModSecurity, MySQL, RAM pressure, and PHP-FPM issues. • Recovered a 5+ GB MySQL database with damaged InnoDB tables where there were no usable backups: used sysadmin magic and a bit of luck. I have a 100% Job Success Score and 5.0 rating on Upwork. After all, I prefer long-term partnership, so put the quality at the top. 𝗛𝗮𝘃𝗲 𝘀𝗼𝗺𝗲𝘁𝗵𝗶𝗻𝗴 𝘁𝗵𝗮𝘁 𝗻𝗲𝗲𝗱𝘀 𝗳𝗶𝘅𝗶𝗻𝗴, 𝗺𝗶𝗴𝗿𝗮𝘁𝗶𝗻𝗴, 𝗼𝗽𝘁𝗶𝗺𝗶𝘇𝗶𝗻𝗴, 𝗼𝗿 𝗯𝘂𝗶𝗹𝗱𝗶𝗻𝗴? 𝗦𝗲𝗻𝗱 𝗺𝗲 𝗮 𝗯𝗿𝗶𝗲𝗳. 𝗜’𝗹𝗹 𝗹𝗼𝗼𝗸 𝗮𝘁 𝗶𝘁 𝗮𝗻𝗱 𝘁𝗲𝗹𝗹 𝘆𝗼𝘂 𝘄𝗵𝗮𝘁 𝗜’𝗱 𝗱𝗼. More about me: I troubleshoot costs and performance using the scientific method. My IT management and customer support background let me prepare and apply changes systematically, test them, and keep a rollback plan. I work iteratively with planned changes, priorities, automation, monitoring and documentation. As an expert and specialist, as a Linux Server Administrator, I work with Ubuntu, Debian, CentOS, AlmaLinux, and CloudLinux. As a Windows Server Administrator, I work with Microsoft Active Directory, Group Policy, patching, hardening, and access control. My system administration work includes Linux, Windows Server, Virtual Private Server environments, Docker, VPN, firewalls, DNS, SSL/TLS, Cloudflare, monitoring, network administration and network security. I'm an experienced sysadmin, so you can bet on getting a reliable, hands-on Senior Systems Administrator for your tasks, a kind of infrastructure specialist. For automation and DevOps, I use Python, Bash, Terraform, and Ansible. I also work with WordPress, PHP, Nginx, Apache, cPanel/WHM, Plesk, and email infrastructure in Linux System Administration environments. For databases, I work with MySQL, PostgreSQL, and MSSQL, including performance tuning, indexing, migrations, backup and recovery, and troubleshooting across the application and infrastructure layers.

System administrator with more than 10 years of experience. Work with all Windows server platforms and user OS, mail, O365, Exchange online, AD, Azure AD, GPO and so on.

I focus on building reliable systems and enjoy digging into complex issues — performance tuning, disaster recovery, root cause analysis, and solving problems that aren't always straightforward. With 20+ years in system administration and infrastructure engineering, I work with both legacy systems and modern environments — from bare metal servers to virtualized and containerized setups. 🚀 Key areas I work with: • Infrastructure planning, setup, and migrations (bare metal ↔ VM ↔ cloud) • Troubleshooting and performance tuning (high CPU/load, slow systems, bottlenecks) • Email deliverability (SPF, DKIM, DMARC, spam issues, warmup, mail server reputation restoration) • Virtualization and containerization (VMware, Proxmox, KVM, Docker) • Networking and VPN solutions • Disaster recovery, backup strategies, malware cleaning, compromise investigation, and finding attack vectors • Long-term systems support and maintenance 🔧 Core Expertise • OS: FreeBSD, Linux (CentOS, AlmaLinux, Rocky, RHEL, Ubuntu, Debian, Gentoo), Windows, Windows Server • Virtualization: VMware vSphere, ESXi, Proxmox, KVM, oVirt, VMware Workstation, VirtualBox • Containers & Automation: Docker, Docker Compose, Jenkins, Ansible • Web: Nginx, Apache, LiteSpeed, Tomcat, Lighttpd, Caddy • Databases: MySQL, MariaDB, PostgreSQL, MongoDB • Mail systems: Postfix, Dovecot, Courier Cyrus, Rspamd, Postgrey, PostfixAdmin, SquirrelMail, Roundcube, SPF, DKIM, DMARC, MTA-STS, AWS SES, Mailgun, Sendy • Control panels: WHM/cPanel, VestaCP, Virtualmin, Cyberpanel, and so on 🔐 Networking & VPN • WireGuard, AmneziaWG, OpenVPN, StrongSwan, tinc, mpd5, IPSec, L2TP, IKEv2 • BGP (quagga), Squid (including LDAP and Kerberos auth), DNS (BIND), DHCP, TFTP • Fail2ban, iptables, ipfw, pf, csf 💾 Storage & Backup • TrueNAS Core/Scale, FreeNAS, SAN (iSCSI), ZFS, AWS S3, Backblaze, Wasabi • Veeam Backup & Replication, XSI Backup, rsync, rsnapshot, rclone 🛠 Legacy Systems & Industrial Equipment Support • Migration and virtualization of legacy systems (DOS, Windows 3.x/9x/NT/2000) • Running outdated software on modern hardware via virtualization • Recovering systems from an old working HDD to a VM if native hardware fails. Including industrial PCs. ⚙️ Other • Samba3 + LDAP, Samba4 (NT4 and AD domains analog, LDAP, domains up to 500 users, GPO, roaming profiles) • Monitoring: Zabbix, Prometheus, Grafana • Services: Memcache, Redis, OpenLDAP, NFS, SVN, Git, GitLab (self-hosted), FTP, SFTP • Platforms: Moodle, Nextcloud, OnlyOffice, BigBlueButton, DAViCal, WordPress, Magento • Remote management: AnyDesk, TeamViewer, Radmin, Ammyy Admin, RustDesk, MeshCentral • Hardware: Dell, HP, Supermicro servers, Dell PowerVault storages • Networking equipment: HP, Dell, 3Com switches • Embedded/firmware: DD-WRT, OpenWRT (including software cross-compiling for ARM on x86_64) • Scripting: Shell scripting, Python, PHP I value long-term collaboration and quality over quick fixes. Have an interesting or unusual problem? That's exactly what I enjoy — feel free to reach out.

More than 15+ year previous experience in Linux/Sysadmin/Hosting Design of High Availability/High-Performance services and architectures Ability to work flexible hours My primary experience (daily tasks) Server Setup/Migration/Transfer, Server Configuration, Server Optimization, Server Troubleshooting, Domain Registration, Domain Transfer, Domain Nameservers, Domain DNS Website Transfer, Website Migration SSL Install, SSL Renew, SSL Certificate Signing Request (CSR), SSL Let's Encrypt & Certbot Mail Transfer/Migration, Mail Delivery (SPF/DKIM/DMARC) Solid working knowledge of RPM/DEB based Linux Distributions: RHEL, CentOS, AlmaLinux, Rocky Linux, Oracle Linux, Fedora, Debian, Ubuntu, ArchLinux Experience with AWS EC2, AWS Lightsail, AWS RDS, AWS ROUTE53, AWS S3 Experience with RackSpace, DigitalOcean, Singlehop, Hetzner Dedicated, Hetzner Cloud, OVH, Godaddy Experience with Shared Hosting : JustHost, BlueHost, Hostgator, Godaddy, a2hosting, fatcow Experience with Control Panels: cPanel & WHM, Plesk, DirectAdmin, Virtualmin/Webmin, CWP (Control Web Panel) Software: Apache, Nginx, PHP-FPM, BIND, DHCP, Dovecot, Exim, Postfix, MySQL, iptables, ufw, CSF

As the Founder and Owner of a successful Zoho solutions business, I bring 10+ years of hands-on experience with Zoho and 20+ years in app, web, and database development across dozens of industries. I understand the challenges founders face—manual processes, inefficient workflows, and lack of system integration—and I design solutions that save time, increase productivity, and drive growth. I specialize in implementing, customizing, and expanding Zoho applications to meet the unique needs of your business. From custom Zoho CRM development to complex integrations via APIs, Zapier, or Make, I create systems that align perfectly with how you work. My goal is to automate your sales, marketing, and business processes while standardizing workflows for maximum efficiency. Zoho Expertise: ✅ Zoho One | ZeptoMail | Zoho CRM | Zoho Flow | Zoho Desk | Zoho Analytics ✅ Zoho Books | Zoho Inventory | Zoho Creator | Zoho Recruit & Zoho People ✅ Zoho Subscriptions | Orchestly | Zoho Catalyst | Custom API Integrations What I Deliver: Fully customized Zoho workflows that match your business processes Automation of repetitive tasks to free up your team’s time Custom modules, fields, views, and filters to make Zoho work the way you do Seamless integrations across Zoho apps and external systems As a founder myself, I know what it takes to scale a business efficiently. Let’s work together to unlock the full potential of Zoho for your business, automate your operations, and drive measurable results.