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I am a seasoned System Administrator with over 14 years of experience in designing, deploying, and maintaining enterprise-grade IT infrastructures. I specialize in building efficient, reliable systems that keep businesses running smoothly Competencies: - Infrastructure Design: Deploying robust Windows & Linux environments - Networking: Advanced configuration of routers, switches, and access points - Virtualization & Containers: Hyper-V, KVM, Proxmox, Docker - Operational Excellence: Automated backups, VoIP, and proactive monitoring systems Certifications: - MCSE (Server Infrastructure) - CCNA (Routing and Switching)

Platform & DevOps Architect | Kubernetes, GitOps, HA Databases, Cloud I help companies build reliable production infrastructure and solve critical incidents. My specialties include: * Kubernetes and GitOps platforms * Cloud solutions (AWS/Azure/GCP) * PostgreSQL Patroni and database HA * Active Directory and Windows infrastructure * Disaster Recovery and High Availability * Production troubleshooting and performance optimization With 20+ years of infrastructure experience, I work with startups and enterprises to design, automate and operate business-critical systems. Linux / Platform Engineering: • Production Kubernetes platforms using GitOps (FluxCD, ArgoCD), Helm, and Docker • Web and application stacks: nginx, Apache, PHP, MySQL/MariaDB * DBA: Postresql Patroni, MySQL InnoDB Cluster, Galera Cluster • CI/CD pipelines with GitHub Actions, GitLab CI, Bitbucket Pipelines, and Azure DevOps • Monitoring and observability using Grafana + Prometheus, Zabbix, ELK (+ APM) • Automation and scripting with Bash and Python • Virtualization platforms: VMware, Hyper-V, Xen AWS, GCP, Azure - 10+ years of experience with clouds • Perfect knowledge of SaaS services: EC2, ECR/ECS, VPC, Lambda etc. • Strong architect skills. • aws-cli, cloud, az skills. Windows Infrastructure (20+ years): • Expert in Windows Server 2003–2022, Active Directory, Group Policy, Exchange 2013–2019, and Exchange Online. • Failover Clustering, Network Load Balancing (NLB), MS SQL Server Clusters and AGs. Typical projects: • PostgreSQL Patroni HA clusters • Kubernetes production troubleshooting • ClickHouse migrations and optimization • Active Directory security audits • Hyper-V and VMware infrastructure • Disaster Recovery design and implementation • Performance optimization and incident response

I’m a System Administrator with over 10 years of experience managing IT infrastructure for small and medium-sized businesses. My background covers both Windows and Linux environments, with a strong focus on stability, security, and automation. What I do best: Administration of Windows Server, Exchange, Active Directory, DNS, DHCP Managing virtualization platforms (VMware, Hyper-V, Proxmox) Configuring and supporting Linux servers (Ubuntu, CentOS, Debian) Network management (Cisco, Juniper, Aruba, MikroTik) and VPN setup Automation and scripting with PowerShell, Bash, and Python Backup and monitoring systems (Veeam, Zabbix, Grafana) Hybrid and cloud solutions: Microsoft 365, Azure, Exchange Online Why work with me? I understand how important uptime and security are for businesses I approach every task with reliability and precision I provide clear communication and regular updates If you’re looking for a reliable sysadmin to manage, troubleshoot, or optimize your infrastructure - I’m ready to help.

I am a software reverse engineer: * Are you interested in analysis of software (or device firmware) you don't have source code for? * Don't know how to extract your own data locked in a proprietary data format? * You want interoperability with a proprietary software or online service? * a vendor or supplier locks you to their overpriced closed source solution? * A company is out of business and you need to migrate or to live somehow without official support? Contact me. Requests for reverse engineering of firmwares for any kind of devices and software for all operating systems are welcome. Background: I am an High Performance Computing specialist ( keywords: "super computers" / "number crunching" ) working mostly with huge Linux systems and math related tasks. I am also a scientist specializing in linear algebra. I have somewhat outdated formal training in cryptography (and cryptography related math) but I am definitely not an expert in the field.

🥇 𝗧𝗼𝗽 𝟭% 𝗼𝗻 𝗨𝗽𝘄𝗼𝗿𝗸 | 💰 𝗖𝘂𝘁 𝗖𝗹𝗼𝘂𝗱 𝗖𝗼𝘀𝘁𝘀 𝟮𝘅–𝟱𝘅 | 📈 𝟮𝟮𝟬+ 𝗣𝗿𝗼𝗷𝗲𝗰𝘁𝘀 𝗗𝗲𝗹𝗶𝘃𝗲𝗿𝗲𝗱 | ⚡ 𝟵𝟵.𝟵𝟵% 𝗨𝗽𝘁𝗶𝗺𝗲 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲𝘀 | 🚀 𝟭𝟬𝟬𝟬+ 𝗩𝗠𝘀 | 𝗣𝗕-𝘀𝗰𝗮𝗹𝗲 𝗰𝗹𝘂𝘀𝘁𝗲𝗿𝘀 | 🧠 𝟮𝟬+ 𝗬𝗲𝗮𝗿𝘀 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 | 🎯 𝟲𝗸+ 𝗨𝗽𝘄𝗼𝗿𝗸 𝗛𝗼𝘂𝗿𝘀 | ❌ 𝗡𝗲𝘃𝗲𝗿 𝗢𝘂𝘁𝘀𝗼𝘂𝗿𝗰𝗲𝗱 | 📩 𝗙𝗮𝘀𝘁 𝗮𝘂𝗱𝗶𝘁 𝗶𝗻 𝟮𝟰𝗵 I help companies cut infrastructure costs 2x by migrating from expensive cloud and SaaS solutions to efficient private cloud environments built on Proxmox and Ceph. Whether you're paying too much for cloud, struggling with scaling, or dealing with unstable infrastructure - I design and implement systems that are faster, cheaper, and easier to manage. I work with high-load production environments: clusters with 1000+ VMs, petabyte-scale storage, and fully automated infrastructure. What I can help you with: • Reduce cloud and infrastructure costs by 50–80% using Proxmox-based private cloud • Migrate from VMware, AWS, or other platforms to cost-efficient infrastructure • Build and optimize Ceph storage (RBD, CephFS, S3) for performance and reliability • Fix performance issues, instability, or scaling problems in existing clusters • Design HA architecture with backup and disaster recovery • Automate infrastructure using Puppet and provisioning pipelines Typical problems I solve: • Infrastructure costs are too high and keep growing • Cloud bills are unpredictable • Ceph clusters are slow, unstable, or constantly rebalancing • Proxmox clusters break, failover doesn’t work, or nodes drop • Backup systems are unreliable or too slow • Monitoring systems (Zabbix) overloaded and ineffective Why clients work with me: • 20+ years in enterprise infrastructure • 200+ real-world projects (not lab setups) • Experience with large-scale production systems • Focus on measurable results: cost reduction, stability, scalability Technologies I use: Proxmox VE, Ceph, Zabbix, Puppet, BGP, VPN, HA clusters, Backup & DR systems If your infrastructure is getting expensive, slow, or hard to manage — I can fix it or rebuild it properly.

I specialize in creating custom software tailored to your specific needs, whether it’s a script to automate data collection from online directories 📊 or a fully developed program 💻. My goal is to deliver solutions that make your processes more efficient and help your business thrive 🚀. For Business Owners: Automation has the power to transform your business. Imagine software that performs the work of 10 or even 100 people, freeing up your team to focus on growth 📈. I help small and mid-sized companies (typically <50 employees) achieve their goals with solutions like: • Data Collection: Automatically gather valuable insights from online sources, customer reviews, and directories. • Chatbots: Create bots 🤖 that engage with clients, provide support based on manuals, or even assist in sales. • Process Automation: Streamline repetitive tasks, boost efficiency, and reduce operational costs. If you’re looking for smart, scalable software solutions to tackle your business challenges, I’m here to help! For Software Development Companies: I am an experienced and dependable Python programmer 🐍 who delivers clean, structured, and well-documented code. My focus on quality and efficiency ensures seamless integration into your projects. Whether you need support with data processing or building full-scale applications, I bring professionalism and attention to detail to every line of code ✅. Let’s collaborate to develop software that perfectly meets your needs! 💼