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Over 7 years of dedicated experience as a Linux administrator. Proficient in working on projects and expertly troubleshooting/managing various aspects, including: Linux distributions: Debian, Ubuntu, CentOS, AlmaLinux. Virtualization technologies: VMware, Proxmox, Xenserver, KVM/Libvirt. Hosting environments: WHM/cPanel. Cloud services: AWS EC2, RDS, S3, and Route 53. Network services expertise includes: DNS management: Record configuration, zone transfers, security enhancements (SPF, DKIM, DMARK) to ensure mail servers send/receive mail without triggering spam filters. VPN setup: Efficiently establish, manage, and troubleshoot OpenVPN and IPsec configurations. Mail server setup: Proficient in configuring Exim or Postfix, Dovecot, and MX records. Linux services mastery: Skilled in managing BIND9, Exim4, Postfix, Dovecot, OpenVPN, Squid, Apache2, Nginx, and Samba4. Proficient in deploying iptables and various packages for effective firewalling. Scripting capabilities: Adept with both Bash and Python scripting languages. Network troubleshooting: Skilled in using tools like Wireshark, TCPdump, and others for accurate diagnosis. Firewalls proficiency: Expertise with SonicWall, Sophos, FortiGate, NethServer, PfSense, and MikroTik. SSL certificates management: Able to generate certificates using Let's Encrypt and effectively manage them with Certbot. SSH hardening: Proficient in generating public/private keys for SSH and fine-tuning configurations. Users/groups management: Skilled in efficiently managing user accounts, groups, and permissions. Linux clusters: Competent in setting up and managing Linux clusters. Storage management: Experienced in managing storage with LVM technology.

With over 25 years of hands-on experience in system administration and a profound understanding of GNU/Linux environments, I offer expertise in open source technologies that drive reliable and efficient systems. My proficiency extends to development on various programming languages, enabling me to craft robust solutions tailored to client requirements. Core Competencies: Systems Administration: Proficient in managing all aspects of the Linux operating system, including CentOS, Debian, Ubuntu, and Slackware distributions. Skilled in system optimization, security, and performance tuning. Software Development: Proficient developer with a focus on Perl, Python, PHP, C, C++, SQL, and JavaScript. Well-versed in Object-Oriented Programming (OOP) principles and application development for diverse platforms. Script Development: Adept at developing scripts in Perl, Python, Bash, and Lua for automation, integration, and system enhancement. Strong advocate for leveraging scripting languages for efficient operations. Database Administration: Extensive experience in administering MySQL/MariaDB, PostgreSQL, Oracle, SQLite, and Redis databases. Proficient in database optimization, replication, and backup strategies. Networking Specialist: Deep understanding of TCP/IP and OSI stack layers, with expertise in proxies, HTTP protocol, RADIUS, VPNs, VLAN, SNMP, netflow/ipfix, and BGP. Experienced in designing, implementing, and troubleshooting complex network infrastructures. Monitoring Architecture: Skilled in designing and implementing infrastructure monitoring solutions, including data gathering, processing, and analysis dashboards. Proficient in monitoring various network devices and systems across diverse environments. Web Hosting and Development: Proficient in web server hosting using Apache, Plack, Starman, and Flask, with expertise in HTML5, JavaScript, and REST APIs. Capable of developing dynamic web solutions in Perl, Python, Bash, or C. Professional Approach: I am committed to delivering tailored solutions that align with my clients' needs and exceed their expectations. My creative thinking and positive attitude ensure that challenges are met with innovative solutions, fostering long-term partnerships built on trust and reliability. Conclusion: With a comprehensive skill set and a proven track record of success, I am dedicated to providing exceptional service and driving continuous improvement in every project I undertake. Let's collaborate to transform your vision into reality and achieve unparalleled success.

Support expert in infrastructure with focus in production environment, knowledge in all the projects phases. Used to being exposed to complex scenarios, analyzing performance, architecture and implementation to operational support. Strong technical profile, fast learner. Knowledge disseminator, focused on the solution of issues and proper documentation. Excellent interpersonal skills and full commitment to critical systems 24/7. Certifications: LPIC-1, LPIC-2 and Novell Certified Linux Administrator Administration and Tuning of UNIX/Linux Systems and applications in general. Administration of Services: Puppet/Foreman, Git, Apache, Nginx, Passenger, Unicorn, WSGI, Free Radius, Iplanet, JBoss, Tomcat, WebLogic, JBoss, Postfix, Sendmail, Solr, ElasticSearch, Redis, Memcached, ActiveMQ, RabbitMQ, Logstash, MySQL, MongoDB, Oracle and etc. Expertise in Shell Scripting and Regular Expressions. I provide remote, Linux systems administration support.

I have more than 21 years of IT experience, my career has been developed on both technical and commercial skills with focusing in IT architecture based on Cloud and Open Source Solution. Currently knowledge base includes Cloud, Mobile, Analytics and DevOps solutions. Linux and open source middleware and applications have been my strongest knowledge . Leadership and teamwork are strong skills developed during my carrier and that become a very important knowledge for daily work and also in my life. Those characteristics resulted in two awards in IBM. I was a Technical Leader and I won the IBM SSO Quarterly Meeting Recognition which designated employee those develop differentiation solutions to the customers

I help startups, enterprises, and tech teams design and build cloud-native applications and scalable architectures with a strong focus on performance, security, and automation. With a blend of cloud architecture and software engineering expertise, I craft systems that are resilient, cost-effective, and aligned with business goals. Core Expertise: - Cloud Platforms: Google Cloud Platform (GCP), Amazon Web Services (AWS) - Infrastructure as Code: Terraform - Kubernetes & Containers: K8s, Helm, ArgoCD - DevOps & CI/CD: Jenkins, GitHub Actions - Application Development: PHP, Go, Python, Node.js - System Design & Architecture: Microservices, Event-Driven Systems, REST/gRPC APIs - Security & Compliance: IAM, VPC, Workload Identity, Secrets Management Certifications: - Google Professional Cloud Architect (PCA) - Certified Kubernetes Administrator (CKA) - Certified Kubernetes Application Developer (CKAD) - Certified AppSec Practitioner (CAP) - Cyber Security Foundation Professional Certificate (CSFPC) - Certified Akamai Cloud Computing Foundations (ACCF) I’m passionate about turning complex problems into simple, scalable solutions. Let’s work together to architect your cloud journey the right way — secure, automated, and future-proof.

I am an experienced System Administrator, DevOps Engineer, and Blockchain Engineer with a strong background in server setup, maintenance, networking, security, backup & recovery, monitoring, performance optimization, troubleshooting, and automation. I work daily with the latest open-source technologies across various Linux distributions and cloud environments, ensuring high availability, scalability, and security for mission-critical systems. Core Expertise: • Blockchain Engineering: Design, deployment, and maintenance of blockchain nodes, validators, and supporting infrastructure. Optimization, monitoring, and security hardening of blockchain-related services. • DevOps: Automation with Ansible, CI/CD pipelines, infrastructure as code, and container orchestration. • Cloud: Google Cloud Platform (GCP) infrastructure design, deployment, and optimization. • Version Control: Git workflows and repository management (GitHub). • Linux Distributions: Debian, Ubuntu, Red Hat, Clear Linux. • Network Services: DNS, HTTP, VPN (OpenVPN), Nginx, DHCP, Samba. • Networking: IP tools, routing, firewalls. • Scripting & Automation: Bash, Zsh, Python. • Virtualization & Clustering: Kubernetes, LXD/LXC, Docker. Certifications: • LPIC-2 Certified Linux Engineer I specialize in delivering secure, high-performance, and reliable infrastructure solutions for businesses, with a proven track record in blockchain infrastructure management and open-source systems administration.