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⭐ 100% Job Success | 🌟 Rising Talent | 🚀 Linux & DevOps Engineer I help founders and developers deploy, fix, and scale their infrastructure. From broken Docker containers and Nginx issues to full VPS deployments with SSL and CI/CD — I focus on solving real infrastructure problems fast and cleanly. What I work with: • Docker & Docker Compose • Linux / Ubuntu servers • Nginx & reverse proxies • CI/CD pipelines • Cloud & VPS deployments • FastAPI & PostgreSQL • Kubernetes basics • Infrastructure troubleshooting I already have hands-on experience maintaining Linux infrastructure, deploying web services, configuring SSL, and troubleshooting production issues. If your app needs deployment, debugging, or a stable server setup — I can help.

I build infrastructure that handles real production pressure — not just demos. With 3+ years of hands-on work across AWS, Azure, Huawei Cloud Stack, and OpenStack, I’ve delivered end-to-end cloud solutions for clients ranging from enterprise private cloud environments to SMB server hardening and performance optimization. My work goes beyond setup. I troubleshoot live production issues, write full documentation, and make sure everything is maintainable long after I close the contract. ☁️ Cloud Platforms AWS (EC2, EKS, ECR, ECS, VPC, IAM, Load Balancers) • Microsoft Azure • Huawei Cloud Stack (HCS/CCE) • OpenStack • GCP 🐳 Containers & Orchestration Docker • Kubernetes (EKS, CCE, Minikube) • Helm • Air-gapped offline deployments 🚀 CI/CD & Automation Jenkins • GitHub Actions • GitLab CI/CD • ArgoCD • Ansible 🏗️ Infrastructure as Code Terraform • Automated provisioning • Configuration management 📊 Monitoring & Observability Prometheus • Grafana • ELK Stack • Alerting & Performance Analysis 🔐 Security & Reliability Linux Administration • SSH Hardening • UFW & Firewall • IAM & Access Control • DKIM/SPF/DMARC • Fail2Ban • Lynis 📧 Mail Infrastructure Postfix • Dovecot • Roundcube • MailCow • Email Deliverability & Authentication ✅ What I Can Do For You • Design and deploy production-grade AWS, Azure, HCS, and GCP infrastructure • Set up and manage Kubernetes clusters end-to-end • Build automated CI/CD pipelines from scratch • Automate infrastructure with Terraform and Ansible • Implement monitoring, alerting, and observability solutions • Harden and secure Linux servers and cloud environments • Deploy and manage mail servers with full authentication stack • Troubleshoot and optimize live production environments • Lead cloud migration and modernization projects 💡 Why Clients Work With Me Again • I communicate clearly and keep you updated at every step — no surprises • I focus on root causes, not quick patches — your system stays fixed • I document everything I deliver, so your team can maintain it • I treat your infrastructure as if it were my own • I work in real production environments, not just labs “Infrastructure that scales, pipelines that flow, systems that don’t break at 3AM.”

I'm Nevin Davis, I have a degree and diploma in Computer Science and Engineering. I'm a redhat certified engineer with 8 years of experience as a server administrator. My strengths and skills are:- * Well knowledge in AWS, Google Cloud, Azure... etc * Sound knowledge in Linux/Unix like operating system. * Deep knowledge in cPanel/WHM. * Familiarize with Plesk, Interworx, Website Panel, Webmin, Directadmin, CyberPanel, HestiaCP. * Automated installation of Red Hat Enterprise Linux. * Network configuration and troubleshooting. * Server hardening. * Managing partitions and file systems. * Managing flexible storage with LVM. * User Management & Administration. * Managing selinux. * Basic creation and troubleshooting on scripting like Shell/Perl. * Installing and managing softwares. * Managing installed services. * Kernel re-configuration & parameter tuning. * Installation of patches and packages. * File sharing with FTP. * NFS configuration & administration. * Job Scheduling and Automating process using CRON. * XEN, OpenVZ virtualization. * RAID * Idera Back up server management. * Familiarize web servers- Apache, Litespeed, Nginx. * Deep knowledge in SolusVM. * Migration. * SSL Cert generation, installation. * IPMI, KVM console management. * Billing Module Management(whmcs,vision,osticket) * VPS, Shared and Dedicated server Management * Monitoring (Nagios) & troubleshooting with performance related issues. * Installation of Antivirus and Troubleshooting with virus related issues.

🔧 Linux Systems Engineer | Certified Red Hat Architect | Suse & Oracle Expert I am a seasoned Linux Systems Engineer with extensive experience in enterprise-grade Linux distributions and virtualization technologies. I have a proven track record of designing, implementing, and automating robust server infrastructures. ✅ Certifications: Red Hat Certified Architect in Infrastructure Level II (ID: 190-311-605 rhce , rhca ) Red Hat Certified Specialist in High Availability Clustering Red Hat Certified Specialist in Managing Automation with Ansible Automation Platform Red Hat Certified Specialist in Linux Performance Tuning Red Hat Certified Specialist in Linux Diagnostics and Troubleshooting Red Hat Certified Specialist in Services Management and Automation Red Hat Certified Specialist in Deployment and Systems Management (Red Hat Satellite ) SUSE Certified Engineer (SCE) – including SUSE Linux Enterprise for SAP Oracle Certified Professional (OCP) – Linux & Solaris System Administration 🖥️ Linux Distributions: Red Hat Enterprise Linux (RHEL) , Rocky linux, Alma linux, Oracle linux Debian ( + Ubuntu ) SUSE Linux Enterprise Oracle Enterprise Linux (OEL) CentOS Proxmox VE oVirt, Oracle Linux Virtual manager ⚙️ Virtualization & Containers: Linux KVM / QEMU-KVM LXC / LXD Xen oVirt Proxmox VE 📦 Applications & Cluster Technologies: Ansible (Automation & Configuration Management) HAProxy (Load Balancing) MaxScale (MariaDB Proxy) Percona XtraDB Cluster (High Availability MySQL) Redis/Valkey cluster 🛠️ Storage & Other Systems: Oracle Solaris 10/11 (Certified Administrator) Oracle/SUN ZFS Storage Appliances OpenZFS Linux Raid Linux data recover FreeNAS / TrueNAS 💬 I can help you with: Designing and deploying highly available Linux clusters ( Pacemaker / Corosync ) Automating server provisioning and configuration with Ansible Installation service operations are done with ansible. Server Boot Issue Troubleshooting Data server recovery (Only linux systems) Migrating legacy systems to modern, scalable platforms Securing and hardening enterprise Linux systems Virtualization and private cloud infrastructure setup Linux networking (bonding, swicth, bridge, load balance, lacp, nginx lb) Let's work together to bring stability, performance, and automation to your infrastructure.

I secure, harden, and monitor Linux servers for businesses that cannot afford downtime, breaches, or blind spots in their infrastructure. 100% Job Success | Top Rated | 1,400+ hours on Upwork. If your servers lack proper monitoring, your SIEM is not deployed, your firewall rules are a mess, or your DNS keeps breaking, I fix it properly, not temporarily. What I deliver: - Wazuh SIEM/XDR deployment: full setup, agent enrollment, custom rules, dashboards, and alerting across Linux and Windows endpoints - Server monitoring stacks: Wazuh, Zabbix, Nagios, Grafana - deployed, configured, and tuned to reduce alert noise - Linux server hardening to production-grade standards (Ubuntu, Debian, CentOS) - Firewall policy design and enforcement (UFW, iptables, pfSense) - DNS architecture with failover, DNSSEC, and SPF/DKIM/DMARC for email security - Cloud infrastructure security across AWS, Azure, GCP, and DigitalOcean - NGINX and Apache optimization for high-traffic environments - CI/CD pipeline security and infrastructure automation with Docker and Bash - Log analysis, threat detection, and incident response Recent work: - Deployed and managed Wazuh SIEM across multi-server environments with real-time alerting and compliance monitoring - Built hardened Linux environments for production workloads and educational content delivery - Architected DNS with failover for multi-region deployments Experience includes serving as Cybersecurity & Infrastructure Manager for a venture firm, Senior DNS & Network Security Engineer at a security company, and Infrastructure & Security Consultant for a US-based consulting firm. I respond within 5 hours. Message me with details about your server, monitoring, or security challenge and I will tell you exactly how I can help.

## Professional Experience ### DevOps / Infrastructure Engineer Yeesshh 2018 – Present Sole DevOps/SRE responsible for full production infrastructure of ~50 web services and internal systems in digital advertising environment. **Infrastructure:** * 6 dedicated bare-metal servers hosted in OVHcloud * Proxmox single nodes and Proxmox cluster, altogether with ~30 virtual machines * Proxmox Backup Server, Custom NFS-based backup storage * Multi-region deployment (EU + Canada) * Internal VPN via Pritunl * Docker-based service deployments **Reliability & Operations:** * 24/7 on-call (30-minute critical SLA response) * ~99%+ uptime across production systems * Full Proxmox node disaster recovery (including restoration from backups) * Centralized monitoring via Zabbix * Centralized logging via Graylog * Security monitoring via Wazuh * Incident management via PagerDuty * Post-incident reporting and preventive improvements **Security & Compliance:** * DNS management (SPF, DKIM, DMARC) * DDoS mitigation using CSF/LFD, ModSecurity, mod_evasive * PCI compliance validation via Qualys (minimal adjustments required) * Regular patching & monthly backup validation **CI/CD & Automation:** * GitHub repositories * Jenkins pipelines for controlled deployments * Staging → testing → manual production release workflow * Limited Ansible automation (update & small maintenance scripts) **Modernization:** * Legacy OS upgrades * Partial containerization of services * Kubernetes - self-hosted proof-of-concept deployment (non-production) --- ### CloudOps / SysOps Engineer LCloud 2021 – 2023 Worked in AWS Partner environment supporting global enterprise and mid-size clients as L1 support. Environment: Amazon Web Services Responsibilities: * 24/7 production support (L1) * EC2, RDS, S3, IAM troubleshooting * Backup & restore procedures * Log analysis & incident escalation * Execution of infrastructure changes according to documentation * Exposure to IaC-managed environments --- ### Independent Linux Infrastructure Consultant 2012 – 2021 Provided infrastructure and system administration services for up to 100 international clients including web hosting providers. Experience includes: * Web hosting environments (Canada & Italy) * Email servers (Postfix/Exim) * DNS management * CMS deployments (WordPress, Drupal, Joomla) * Monitoring (Nagios, Zabbix) * Virtualization (Proxmox) * Security cleanup & WordPress malware removal * Redmine & GitLab environments --- ### Early Career (Condensed) Senior Linux Administrator – Retail network (250 employees) Network design, Linux desktop environment (60+ machines), POS equipment support, server infrastructure management. Additional system & network administration roles (2007–2012). --- ## Personal Technical Projects * Self-hosted AI workflow automation using n8n * Local LLM experimentation (LLaMA-based models compiled via llama.cpp) * Raspberry Pi lab (media server, backup storage, surveillance systems) * Mobile app development(dart) and backend infrastructure (Dockerized Node.js backend) --- ## Languages Ukrainian – Native Russian – Native English – Professional working Polish – Limited working Spanish - Learning