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The SysAdmin Who Fixes What He Audits Your infrastructure is critical. Whether it's a server down at 3 AM, a DevOps pipeline that needs to be bulletproofed, or a NIS2 compliance deadline three weeks away — you need someone who understands both the code and the consequences. I'm Giuseppe. 12+ years managing production Linux infrastructure for hosting providers, SaaS platforms, and enterprise environments. ISO 27001 & ISO 9001 Lead Auditor certified (IBC/ACCREDIA accredited). I don't hand you a report and disappear. I implement the fix. 🔧 LINUX INFRASTRUCTURE & DEVOPS Server Administration & Performance - Linux (Debian, Ubuntu, CentOS/Rocky, AlmaLinux) — tuning, troubleshooting, production hardening - Apache/Nginx optimization, Varnish, database performance (MySQL/MariaDB replication) - Virtualization: Proxmox clusters, KVM, LXC containers DevOps & Automation - CI/CD pipelines, infrastructure automation, Ansible playbooks - Custom monitoring and alerting systems (Zabbix, Prometheus, Grafana) - Backup architecture with integrity verification and disaster recovery testing Web Hosting Platforms - cPanel/WHM expert, Plesk, DirectAdmin, ISPConfig - Mail systems: Postfix/Dovecot, spam filtering, deliverability and reputation repair - High-availability and load-balanced web environments (HAProxy, Nginx upstream) Cloud & Migrations - AWS, Google Cloud, DigitalOcean, bare-metal datacenter - Zero-downtime migrations — including 50GB+ mail servers with zero data loss - BGP routing, datacenter networking (Huawei VRP, GRE tunnels, failover) 🔐 SECURITY & COMPLIANCE Infrastructure Security - Firewall design and deployment: OPNsense, pfSense, iptables/nftables - Server hardening, intrusion detection, DDoS mitigation - Incident response, forensic analysis, post-breach recovery Compliance & Auditing - ISO 27001 Lead Auditor — IBC/ACCREDIA accredited certification - ISO 9001 Lead Auditor - NIS2 / D.Lgs. 138/2024 compliance assessment and implementation roadmap - GDPR technical measures — real infrastructure changes, not just documentation - ISMS implementation for SMBs (practical, scalable, without enterprise overhead) Why this matters: most compliance consultants understand the framework, not the stack. I run the gap analysis and implement the remediation. One engagement, not two. 🎯 WHAT MAKES ME DIFFERENT No fluff communication — I tell you exactly what is broken, why, and what it costs to fix. Production-safe approach — changes tested and staged before touching live systems. Full documentation — every engagement ends with clear, human-readable documentation your team can use without me. Long-term architecture thinking — I build systems to last, not patches to close tickets. 🏆 RECENT WINS E-commerce platform: page load 8 seconds to 800ms (10x improvement) Stopped a 500K+ req/s DDoS without service interruption Automated backup testing pipeline — caught 6 silent backup corruptions before disaster NIS2 compliance roadmap for Italian SMB: full implementation in 4 weeks ISO 27001 gap analysis: 87 findings, fully remediated and compliant in 3 months BGP migration from legacy ISP to dual-transit with zero downtime 📋 WHEN TO HIRE ME Emergency situations: - Server down or severely degraded - Active breach, hacked server, malware containment - Failed deployment with business impact Planned projects: - Infrastructure audit and security hardening - ISO 27001 / NIS2 compliance implementation - DevOps pipeline setup or optimization - Cloud or bare-metal migration - Ongoing managed infrastructure with real SLAs NOT a good fit if you need someone who rubber-stamps a checklist and moves on. I dig into root causes and fix them properly. This takes slightly longer and costs more. It is worth it. 📬 AVAILABILITY Taking new projects — limited capacity for ongoing engagements. Emergency response: typically within 4-6 hours on business days. Message me with your specific problem, timeline, and budget. I respond with clear next steps, no vague proposals. Linux Administration | DevOps | Server Security | ISO 27001 | NIS2 Compliance | GDPR | Cybersecurity | pfSense | OPNsense | cPanel | WHM | Plesk | Proxmox | KVM | HAProxy | Nginx | Apache | MySQL | MariaDB | Postfix | Ansible | Cloud Migration | Incident Response | Infrastructure Audit | ISMS

I help businesses keep Linux servers secure, stable, and monitored before small issues turn into critical outages. I am a Linux System Administrator with hands-on experience managing production environments, focused on reliability, security, automation, and proactive monitoring. I work with servers that must stay online, predictable, and recoverable — not experimental setups. What I can help you with: • Linux server administration (Ubuntu, Debian, RHEL, AlmaLinux, Rocky) • Server troubleshooting and incident response • Root cause analysis using logs and metrics • Security hardening (SSH, firewall, updates, fail2ban) • Automation with Bash, systemd, cron • Proactive monitoring and alerting (CPU, RAM, disk, services) • Ongoing server maintenance and health checks • Backup validation and operational hygiene Monitoring & observability focus: I specialize in preventive monitoring — detecting problems before they impact users. This includes correct thresholds, alert fatigue reduction, and actionable alerts instead of noise. Software, platforms, and tools I work with: • Web & application servers: Apache, Nginx, Tomcat, HAproxy • Databases & search: MySQL, MongoDB, OpenSearch • Monitoring & observability: Prometheus, node_exporter, Alertmanager, Zabbix, Netdata • Logging & analysis: journalctl, rsyslog, logrotate • Automation & scripting: Bash, cron, systemd • Security: OpenSSH, iptables / nftables, fail2ban • Containers & orchestration: Docker, Kubernetes • Hosting & control panels: cPanel, DirectAdmin, Plesk, HestiaCP • Virtualization & infrastructure: Proxmox, SolusVM • Version control & tooling: Git • Operating environments: bare metal, VPS, cloud servers My working principles: • Production-safe changes only • No modifications without confirmation • Clear scope and expectations before starting • Written summary and recommendations after delivery • Calm, methodical approach during incidents If you’re unsure where the problem is, message me first. I can help you identify the safest and most effective solution before any changes are made.

ABOUT ME A full-stack Java developer with a passion for creating efficient and user-friendly applications. Proficient in utilizing open-source technologies to develop and implement scalable solutions. Proven ability to turn complex problems into simple and elegant solutions. Committed to staying up-to-date with the latest industry developments and constantly seeking new challenges to grow as a professional.

I'm Joaquin, a DevOps/IT with a strong focus on GNU/Linux. Specializing in Docker, Ansible, and bash scripting, VM deployment and configuration (QEMU, KVM), VPNs deployments, Nginx configuration, managing firewalls and back-ends, I also deploy applications using CI/CD tools like Ansible, GitHub Actions, and Bitbucket Pipelines. I'm an adaptable and efficient problem solver, continuously learning and implementing solutions on the fly.

I offer design and development services to a wide range of industries and business areas. I'm an experienced, full-time freelance developer with a wide cross-section of knowledge in both backends, frontend, mobile tech-stack, security and network administration. I'll work with you continuously, so I'll be able to execute a project from concept to the final solution. • Programming Java, Objective-C, Kotlin, Swift, Ruby,Python, PHP, Bash, Javascript, Node.js, C, C++, GoLang, .NET Framework, C#, PowerShell, Assembly (ARM and X86), OOP and procedural languages • Networking TCP/IP, UDP, DNS, SMTP, IMAP, RIPv2, EIGRP, BGP, HTTP, HTTP/2, HTTP/3 DRAFT, TLS, SSL, etc. • Infrastructure Amazon AWS, Google GloudPlatform, Microsoft Azure, Digital Ocean, RedHat OpenShift, IBM Cloud, Kubernetes, Docker, Proxmox • Frontend management and webdesign HTML5/CSS3, Material UI, Semantic UI, Kendo UI, Bootstrap 3, 4, Mobile and Desktop Responsive Web design, PHP(Laravel, Codeigniter, Drupal, Joomla, Wordpress), React, Vue.js framework, NodeJS(Express, Loopback), TypeScript, GraphQL, Redis, Axios, Webpack, Docker, 0Auth, Payment integration, Rest and Restful APIs, Custom API, Google API etc • OSes Linux (Ubuntu, Debian,ArchLinux, RHEL, CentOS) - *BSD (FreeBSD, OpenBSD), Windows (Professional, Server, Enterprise), macOS (from X to Catalina) • IDE Tools Intellij Suite (PHPStorm, PYCharm, Rubymine, etc), Android Studio, Visual Studio, Atom, Eclipse, Netbeans • Database Oracle, MySQL, MSSQL, NoSQL, Redis, MongoDB, stored procedures, triggers, PL/SQL, etc. • DevOPS and deploy automation Ansible, Chef, Puppet, Bamboo, Jenkins, CircleCI, Gitlab CI, GIT, GitHub Enterprise, Subversion, Mercurial, Bitbucket, Jira, Confluence and all Atlassian suite • Enterprise Grade Infrastructure MQTT, KAFKA, RabbitMQ • Reverse engineering IDA Pro, Ghidra, Hopper, SMALI, deobfuscators, etc.

I'm Top Rated Plus Freelancer with over 12000 hours from UPWORK and over 17 years of experience! I have hands on experience for below vendors and technologies, but not limited to: Cisco | Juniper | Mikrotik | Arista | Dell 6 years of experience in the administration of LAN networks, with specializations in Cyber Security and Web hosting. A hardworking individual who can operate in a critical environment with excellent perserverance. Promoter of public relations. Consolidated experience in team management, KPI analysis and promoter of transversal relationships with the company's production departments, in order to obtain the best result, having the customer experience as the main focus By putting dedication and passion into it, every day I aim to operate according to rigorous quality standards, which I try to convey in all my projects, with all of my teams - Configure and manage Unix server - Web Hosting optimization and infrastructure design - Plesk,cPanel, HAproxy, Varnish, ElasticSearch knowledge - VMWare VCSA, Cluster RDS with ISCSi storage and vCloud Director ( VMware NSX, Edge Gateway ) - VPN SSL, IPSec with FortiGate or Pfsense - Test failover Zerto disaster recovery - Backup infrastructure with CommVault or Veeam - Troubleshooting of server performance issue - ELK Stack (ElasticSearch, Kibana, Filebeat, Logstash) for log management and consulting - Windows and Linux servers administration (WebSRV, Proxy, IPS, DC, Simulation environment, Docker, Disaster Recovery) - Active Directory and RADIUS Server for Wi-Fi authentication and students/teachers PCs - Server virtualization with ESXi and vCenter (Cluster, vSAN, vMotion, VDI) - VXLAN for Guest WIFI, with 3000+ clients - QoS Juniper/HP/Cisco Switches - Fiber network Design (Multimodal OM4 Network, 10Gbe Trunk) - WebServer optimization using Redis, Memcached, OPCache, Varnish and TCP BBR