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US-Based. Ex-Google Senior Systems Engineer. I have over 25 years of running Linux infrastructure, websites, system administration and technical services. I can help with: * Linux server troubleshooting, setup & security (CentOS, Ubuntu, Alma, Rocky, etc.) * Apache & nginx web servers * MySQL & MariaDB SQL servers * Email services (dovecot, exim, sendmail) * PHP, Golang, Python programming, Bash scripting * SSL certificate issues * DNS issues * Wordpress issues * Server & website migrations. * VPI/PBX: Asterisk, Kamailio, Twilio, etc. * Compiling software * Web hosting control panels (including cPanel/WHM, etc) * GCP & AWS management * Networking: VPNs, VLANs, routing, switching, DHCP, PXE, BGP, etc * SRE, Devlops, monitoring & logging, etc. After running a web hosting company for 17 years and then working as a systems engineer at Google for 7 years I am now ready to help you with your internet & website infrastructure. I live in the US, work in the Eastern Time Zone and I am available via email, WhatsApp, phone or video calls. If you need a trusted partner to work with your website or infrastructure, then look no further :)

Most AI freelancers build demos. I build systems that ship. 🚀 I'm a Full-Stack AI Engineer with a B.Sc. in Artificial Intelligence and I specialize in one thing: turning complex AI problems into production-ready solutions that scale. From day one, I own the full stack: data ingestion, model architecture, evaluation, API development, containerization, and deployment. No handoffs. No gaps. Just a complete system, built right. 🎯 What I engineer: 🤖 ML & Deep Learning custom model training, fine-tuning, forecasting, classification (TensorFlow, PyTorch) 🧠 LLMs & NLP RAG pipelines, semantic search, document intelligence, agentic systems (LangChain, OpenAI API) 👁️ Computer Vision & OCR detection, segmentation, document parsing at scale ⚡ Production AI APIs high-performance FastAPI/Flask backends, Dockerized and deployment-ready 🔄 Intelligent Automation AI-driven decision systems built for real business logic 🛠️ Stack: Python · PyTorch · TensorFlow · LangChain · OpenAI API · FastAPI · Docker · HuggingFace · OpenCV I don't do experiments. I build things that work reliably, efficiently, and exactly to spec. ✅ If your project demands serious AI engineering, I'm the engineer you're looking for. 💼

⭐️ Top Rated Plus - Top 3% Expert on Upwork 🕒 9000+ Working Hours ✅ 20+ Years of Expertise ✅ 100% Job Success ✅ 300+ Successful Projects Finished ✅ 5 Star Rating Hello, I'm Oleksandr. As a seasoned Linux System Administrator and DevOps Engineer with over 20 years of experience I specialize in delivering robust IT solutions that enhance operational efficiency and security. My expertise spans across various domains, including: ▪ DevOps & Automation: Successfully implemented automated provisioning using Ansible, streamlining deployment processes and reducing manual intervention. ▪ Linux & FreeBSD Maintenance: Managed and optimized server environments on CentOS, Debian, Ubuntu, RHEL, and FreeBSD, ensuring high availability and performance. ▪ Cloud Hosting: Deployed and maintained scalable cloud solutions on AWS, Azure, and DigitalOcean, enhancing infrastructure reliability and scalability. ▪ Virtualization: Utilized Docker, VirtualBox, and OpenVZ to create flexible and efficient virtual environments, supporting diverse application needs. ▪ Web & Database Servers: Configured and maintained Apache, Nginx, MySQL, PostgreSQL, and MongoDB servers, ensuring secure and efficient data handling. ▪ Networking & Security: Implemented secure networking solutions, including VPNs and firewalls, to protect sensitive data and maintain network integrity. I am committed to continuous improvement and staying abreast of the latest industry trends. My approach is rooted in ITIL best practices, ensuring incident management and business continuity planning are at the forefront of my work. Let's collaborate to drive your IT projects to success with innovative solutions and expert guidance.

A highly motivated individual with over 7 years of hands-on experience in the hosting and website industry. I specialize in web design, live chat support, and delivering professional solutions across various domains with efficiency and precision. support, and adept system administration. I bring a wealth of experience and a proven track record What i can do : ✨ Website Setup & Design: Transform your ideas into stunning websites. I specialize in creating visually appealing and user-friendly designs tailored to your brand. ✨ WordPress Setup & Management: Get your WordPress site up and running smoothly. I provide installation, configuration, customization, and ongoing management to ensure optimal performance. ✨ Virus Removal & Security: Protect your online presence with my expert virus removal services. I conduct thorough scans to clean malware and implement security measures to safeguard your website. ✨ Website Migration: Seamlessly migrate your websites between different hosting platforms. I handle all aspects of the migration process to minimize downtime and ensure a smooth transition. ✨ Server Setup & Configuration: Whether it’s DigitalOcean, AWS, Alibaba Cloud, Azure, or any other host, I can set up and configure your server to meet your specific needs. ✨ Apache/Nginx Configuration: Optimize your web server for peak performance. I provide installation and configuration of Apache or Nginx to ensure efficient handling of web traffic. ✨ Email Delivery Solutions: Troubleshoot and resolve email delivery problems, ensuring your messages reach their intended recipients without issues. ✨ General IT Tasks: From troubleshooting to various IT-related tasks, I am here to assist you with any technology needs you may have. Feel free to reach out for any of these services or if you have specific requirements!

I am an experienced Linux administrator. I have 15+ years of experience in Linux system administration and problem-solving. I can troubleshooting all kinds of linux issues, centos migration, centos/ubuntu crash rescue, investigate server performance issue and web server administration. Skills & Deliverables: Cloud Infrastructure & Dedicated VPS Setup (AWS, DigitalOcean, Hetzner, Contabo, Linode etc) Building secure, high-performance servers with proper backup, and automation. Linux Administration(Centos, Ubuntu, Debian, Rocky Linux, Almalinux) Performance optimization, monitoring, troubleshooting, log analysis, and uptime management. Server migration(Centos, Ubuntu, Debian, Rocky Linux, Almalinux) Secure migration of data and app between different servers. Web Server Trouble-shooting Slow server, website troubleshooting and optimization Recurring downtime issue troubleshooting and fix. Centos7 server migration Upgrade centos7 to almalinux 8 or 9. Migrate data&apps from centos7 to Ubuntu/Debian/Rocky/Almalinux Server Upgrade(Centos, Ubuntu, Debian, Rocky Linux, Almalinux) Upgrade ubuntu 14 16 18 20 22 to the latest version. Upgrade Debian , Rocky Linux, Almalinux to the latest version Server rescue(Centos, Ubuntu, Debian, Rocky Linux, Almalinux) Fix linux system crash, file system corruption. Security & Compliance Firewall configuration, access control, TLS/SSL, patching, vulnerability prevention. Backup & Disaster Recovery Strategy Automated backups, retention policies, restore testing, failover planning. Application Hosting & Migration WordPress, Prestashop, Forum app, Node.js, Python apps — smooth migration without downtime. Email Infrastructure & Deliverability Improvement Domain authentication setup (SPF / DKIM / DMARC), inbox placement, fixing spam issues. Why choose me? - Strong skills and extensive experience , can work independently and efficiently , able to fix complex issues - Fast and clear communication, detail and solution oriented - Honest and proactive work ethic

Your server is down. Your team is stuck. Your infrastructure is holding your business back. That's where I come in. I'm a Senior Systems Administrator with 10+ years of hands-on experience managing Linux and Windows server environments for enterprise-scale operations including 7 years at Nayatel, one of Pakistan's largest ISPs, where I owned infrastructure serving thousands of concurrent users. I've migrated complex on-premise systems to cloud environments with zero downtime, hardened servers against real threats, and built automation pipelines that eliminated hours of manual ops work every week. ━━━━━━━━━━━━━━━━━━━━━━━━ WHAT I HELP YOU WITH ━━━━━━━━━━━━━━━━━━━━━━━━ Server Setup & Administration Linux (Ubuntu, CentOS, RHEL) and Windows Server provisioning, configuration, patching, and troubleshooting. You get a stable, optimized server not just one that's running. Cloud Infrastructure (AWS & Azure) Deployments, migrations, cost optimization, and ongoing management. I hold AWS Solutions Architect and CloudOps certifications and have managed multi-cloud environments in production. Security & Hardening Firewall configuration, OS hardening, intrusion detection (Wazuh, ELK Stack), SSL/TLS, VPN setup, and penetration testing. I don't just set it up, I make sure it stays locked down. Automation & DevOps Support Terraform, Ansible, Docker, Kubernetes, CI/CD pipelines. Repetitive manual tasks get automated. Deployments become consistent and reliable. Database & Network Operations PostgreSQL, MySQL, MariaDB administration. DNS management, email servers (Zimbra, Axigen), routing, and VPN configuration. ━━━━━━━━━━━━━━━━━━━━━━━━ WHY CLIENTS WORK WITH ME AGAIN ━━━━━━━━━━━━━━━━━━━━━━━━ Most infrastructure freelancers disappear after delivery. I don't. I document everything, explain what I did and why, and stay available if something comes up after handoff. Two decades of enterprise ops work taught me that reliability is the job, not just technical skill. I keep communication clear and direct. No jargon dumps. No vague updates. You'll always know exactly where things stand. ━━━━━━━━━━━━━━━━━━━━━━━━ CERTIFICATIONS ━━━━━━━━━━━━━━━━━━━━━━━━ AWS Certified Solutions Architect – Associate AWS Certified CloudOps Engineer – Associate AWS Certified Cloud Practitioner Microsoft Certified: Azure Fundamentals Certified Kubernetes Administrator (CKA) ━━━━━━━━━━━━━━━━━━━━━━━━ LET'S TALK ━━━━━━━━━━━━━━━━━━━━━━━━ If your infrastructure needs to be more stable, more secure, or better managed, send me a message. I'll tell you honestly whether I can help and what that looks like.