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Overview Seasoned Linux Systems Engineer with 20+ years of hands-on experience managing complex server environments, cloud infrastructures, and network systems. I specialize in building robust, scalable infrastructure solutions with a focus on performance optimization, security, and automation. Available for 24/7 operational support with proven expertise in incident management and SLA enforcement. What I Offer I deliver end-to-end Linux infrastructure solutions including: - High-Performance Web Hosting Infrastructure: Apache, Nginx, LiteSpeed with LS Cache optimization, WHM/cPanel management - Database Administration: MySQL, MariaDB, PostgreSQL with replication, clustering, and performance tuning - Virtualization & Cloud Architecture: Proxmox, Virtuozzo, XenServer, KVM, VM migration - Email Systems: Postfix, Exim, Qmail with security solutions (Spamassassin, ClamAV) and authentication (SPF, DKIM, DMARC) - Infrastructure as Code: Ansible, Salt, Git-based deployment pipelines - Comprehensive Monitoring: Prometheus, Grafana, Icinga, Check_mk, Nagios - Backup Solutions: Custom rsync/scp systems, R1Soft, JetBackup, S3 integration - Network Administration: BGP, OSPF routing, VLANs, QoS, VPNs, security policies - Automation & Scripting: Bash, Python, PHP for system automation and deployment tooling Recent Projects - Implemented comprehensive monitoring infrastructure using Prometheus, Grafana and Icinga for a managed VPS provider - Designed and executed a multi-location backup strategy incorporating AWS S3 storage, local backups, and automated verification - Led infrastructure migration following company acquisition, ensuring zero downtime during transition - Implemented configuration management using Salt and Ansible for a fleet of 500+ servers - Created custom monitoring and alerting solutions for specialized business requirements Work Approach I believe in proactive infrastructure management with a focus on: - Building systems that are reliable, secure, and scalable - Implementing automation to reduce human error and increase efficiency - Maintaining comprehensive documentation for all systems and procedures - Regular security audits and updates to minimize vulnerabilities - Clear communication and transparency throughout the project lifecycle With expertise across multiple Linux distributions (CentOS, Alma/Rocky, Ubuntu, CloudLinux, Debian, Slackware) and a proven track record of managing critical infrastructure, I can help your business implement robust, secure, and efficient systems that support your technology goals.

I make cloud infrastructure cheaper and safer. 25 years running production systems, remote since 2010 — I fix what's broken and keep it from breaking in the first place. Recent: I audited a multi-account AWS + Azure + OCI environment and cut ~30% off the addressable monthly cloud spend — killing orphaned resources, right-sizing, and shutting down workloads running 24/7 for no reason. Another five-figure annual saving identified and documented on top. What I do: — Cloud cost optimization — AWS / Azure / OCI. Find the waste, right-size, set guardrails so it stays down. — Infrastructure & security audit — what's exposed, what's misconfigured, what breaks if one component fails. — NIS-2 / compliance gap analysis — risk-management measures, vendor & supply-chain security, incident readiness for EU entities that now have to comply. — NOC monitoring & emergency response — 24/7, <4h SLA. — Migration, hardening, backup & DR — multi-cloud, VMware / Hyper-V, networking, firewalls. I've worked with clients across the US, Canada, EU, and the Middle East. I don't do tier-1 support. I don't read runbooks written by someone else. I know your stack because I've built stacks like it. Top Rated Plus. 100% Job Success. 9,900+ hours logged. One client relationship ran 10 years and 5,600+ hours. I'll tell you the truth even when it's not what you want to hear — including when a "fix" isn't worth doing. If you want the leaks found and closed, let's talk.

✅ Formerly employed by: IBM, Ericsson, MetroAG, Upwork ► Linux, Unix: +19 years. ► AWS: +10 Years. ► DevOps: +9 years . ► SRE: +7 Years. ► Upwork Talent Cloud Member I love Vim/TMUX and split keyboards. Currently I can only accommodate long-term projects. For European clients VAT Reverse Charge may apply. Thank you very much for reading my profile. I'm looking forward to meeting you! Aldo

My objective is to bring excellent client satisfaction, providing quality and professional work. I am a Senior DevOps Engineer. My areas of expertise are: * DevOps methodologies and technologies; * Containers - docker, rkt; * Container's orchestration - kubernetes; * Monitoring - prometheus, time series databases; * Cloud native technologies - kubernetes, prometheus, rkt, envoy, helm, linkerd, vitess; * Content delivery networks and DDoS prevention - Akamai, Cloudflare, Cloudfront; * Systems automation with ansible and chef; * Continuous deployment, continuous integration set up; * Python software development; * Linux - CentOS, RedHat, Debian, Ubuntu, Gentoo (administration, configuration, audit, optimisation); * Amazon AWS, Google Cloud Platform, Azure Cloud; * Network administration (CCNA certified); * Virtualization (VMWare, VirtualBox, HyperVM, OpenVZ, Xen); * VPN systems, OpenVPN (installation and configuration). I can figure out fast the problem and find a solution for it. Languages that I speak: Russian and Romanian - native speaker; English - advanced level.

11 years Linux expertise, passionate about all IT areas and projects. Software, Networking and Hardware skilled.

As a senior linux system administrator with over 15 years of experience, I possess a wealth of knowledge and expertise in all aspects of Linux server administration, configuration, and management. I have different certifications from Udemy, Cisco Networking Academy, AWS and cPanel. I have honed my skills over the years and I am well-versed in using various tools and technologies related to Linux, including Ansible, DigitalOcean, AWS, and cPanel. My extensive experience in Linux system administration has allowed me to develop an in-depth understanding of how Linux servers work and how to optimize their performance to meet business needs. I am proficient in installing, configuring, and managing various Linux distributions and have a solid understanding of networking, security, and server management concepts. In addition to my daily job as a Linux system administrator, I also take freelance projects in my free time. I'm always looking for new challenges and opportunities to expand my knowledge and skills, and I stay up-to-date with the latest developments in Linux and related technologies. Technologies I'm familiar with: CentOS, Redhat, Ubuntu, Debian, Postfix, MySQL, MariaDB, Apache, Nginx, Varnish, Haproxy, Iptables, Zabbix, Nagios, Cacti, Icinga2, Grafana, Elasticsearch, Kibana, Docker, Kubernetes, Odoo, CWP, VestaCP, Plesk, cPanel, Virtualmin, Proxmox, Opennebula. Overall, I am a highly skilled and experienced Linux system administrator who is committed to delivering top-quality services to clients and ensuring the smooth and efficient operation of Linux servers.