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Full-Stack Programmer | DevOps & Cloud Engineer | API & Automation Expert I’m a results-driven programmer and DevOps engineer with strong experience building, deploying, and maintaining modern systems — from lightweight automation scripts to full production-grade cloud infrastructure. Over the past few years, I’ve worked on projects involving: - Backend Development: Python, PHP, Node.js, FastAPI, Flask, Express - DevOps & Cloud: Docker, Nginx, Linux, SSH, CI/CD, Git, VPS setup, server hardening - API Integration: Binance, Telegram, Deriv, REST, WebSocket - Database & Storage: MySQL, SQLite, Redis, S3, FTP automation - Automation & Bots: Trading bots, file synchronization, monitoring scripts, and API clients I specialize in end-to-end system building — from idea → backend logic → cloud deployment → ongoing optimization. Whether you need to deploy Docker apps, manage Linux servers, automate tasks, or debug backend issues — I’ll deliver clean, reliable, and documented solutions. * Tech Stack Highlights: Python | PHP | Node.js | FastAPI | Flask | MySQL | Docker | Linux | Git | Nginx | REST API | WebSocket | Cloud VPS

I'm a professional Senior Linux Systems Engineer with over 14 years of hands-on experience in managing, securing, and optimizing Linux-based servers and infrastructure. If you're a startup, entrepreneur, web agency, or enterprise looking for rock-solid server performance, automation, and security, you're in the right place. I work closely with clients to build stable, scalable, and secure Linux environments What I Can Help You With: Linux Server Setup & Management: Debian, Ubuntu, CentOS, AlmaLinux, RHEL etc Installation, Disk partitioning, LVM, RAID, system hardening Performance tuning and troubleshooting Web Server Deployment: Apache2, Nginx, PHP-FPM, SSL/TLS, Let's Encrypt Virtual Hosts, Rewrite Rules, Reverse Proxy configuration Mail Server Configuration: Postfix, Dovecot, Zimbra, Roundcube etc SMTP, IMAP, SPF, DKIM, DMARC setup Email deliverability and spam protection DNS & Control Panels: BIND, PowerDNS, DNS record management Webmin, ISPConfig, CyberPanel, Virtualmin, Vestacp etc setups Cloud & DevOps Integration: Infrastructure automation using Bash and Ansible Server provisioning, patching, user/group management, cron jobs Experience with various cloud platforms Cloud server setup and management VPN & Proxy Services: Squid, 3proxy, WireGuard, OpenVPN, Anyconnect, PPTP, Ipsec IP rotation, IPv4/IPv6 support, authentication Monitoring & Logging: Zabbix, Nagios, Grafana, Cacti ELK Stack: Elasticsearch, Logstash, Kibana Virtualization & Containers: KVM, Proxmox, VMware ESXi Docker containers, Docker Compose, orchestration Database & Backup: MySQL/MariaDB setup, optimization, replication, backup & restore Rsync, Rclone, cloud/offsite backup strategies Custom backup scripting and automation If you’re looking for a trusted Linux expert to support or transform your infrastructure, let’s connect and discuss how I can help!

I am a Linux & Windows System Administrator and DevOps Engineer with over 8 years of experience, specializing in server management, automation, and cloud infrastructure. I help businesses maintain secure, high-performance, and scalable IT environments. My expertise includes: ✔ Linux & Windows Server Administration: Linux: Debian, CentOS, Ubuntu, RHEL – maintenance, troubleshooting, and optimization. Windows Server: Active Directory, Group Policy, IIS, Remote Desktop Services, DNS, DHCP, and PowerShell automation. ✔ DevOps & Automation: CI/CD pipelines, Ansible, Docker, Kubernetes, Terraform, Jenkins, and GitLab CI/CD. ✔ Cloud & Virtualization: AWS, Google Cloud, DigitalOcean, Azure, VMware, and KVM-based solutions. ✔ Web Servers & Performance Tuning: Apache, Nginx (with PHP-FPM/FastCGI), MySQL, Varnish, Memcached. ✔ Odoo ERP: Deployment, configuration, maintenance, and troubleshooting. ✔ Networking & Security: iptables, rsync, BIND, OpenVPN, Windows Firewall, network troubleshooting. ✔ Email Servers & Deliverability: Exim, Dovecot, Postfix, Microsoft Exchange, MailEnable – setup and troubleshooting. ✔ Backup & Migration: Secure and seamless server, database, and email migration. ✔ Control Panels: WHM/cPanel, Virtualmin, Plesk – installation and management. ✔ Monitoring & Logging: Zabbix, Munin, Nagios, ELK Stack (Elasticsearch, Logstash, Kibana), Windows Event Viewer. ✔ Lost Data Recovery: Helping recover critical data from both Linux & Windows environments. I am committed to providing secure, efficient, and scalable solutions for businesses. If you need assistance with server management, DevOps automation, Windows/Linux support, or performance optimization, feel free to reach out!

Hi, I am Sazedur Rahman, working as a System Engineer for Linux/Unix-like OS Based Systems in a Reputed Financial Organization. I am new to Upwork but have more than five years of profound Experience in Linux/Unix System Administration, Configuration, Server Security and Automation. Completed various Live projects such as Authoritative DNS, DNSsec, Caching DNS, Zimbra Multi-Server Mail Solution, Multiple Web Server using Apache and NGINX, Local Repository for Linux Distributions Like- CentOS/Ubuntu & EPEL/Zimbra/RemiPHP, File Server Integrated with Windows AD for more than 8K Users, IPA Server, NTP Server, Cockpit Server, Secure File Sharing with Next Cloud. Expertise in - Linux Server Configuration- Web, Mail, DNS, Virtual Hosting, Samba, NFS, FTP, HA Cluster, Apache/NGINX with SSL/TLS, Gluster Storage (GFS2), Zimbra Mail Server, Red Hat Satellite, Spacewalk (open-source systems management), Linux System Security - Firewalld, iptables, fail2ban System Automation using- Shell Scripting, Ansible, Python Linux System Penetration Testing using OpenSCAP. Virtualization- vmware, rhev, kvm Kubernetes, Docker, Container Also certified as CCNA, RHCE, RHCVA & RHCA (Red Hat Cert ID: 160-039-582).

I'm a DevOps and Linux System Engineer, and I'd want to introduce myself. I have extensive experience as a Software and System Architect, as well as an extensive understanding of Open Source Projects. I am mentioning a few experiences with different technologies and tools: Orchestration: Docker, Swarm Kubernetes Cloud Computing: AWS, GCP, Azure, DO, Linode... Virtualization: VMware, Hyper-V, ESXi, Proxmox, FreeNAS Linux Distro: RHEL based distros, Debian based distros, FreeBSD and alpine Web Server: Apache, Nginx, Caddy, Traefik, NodeJSHosting: CMS, SSL, Domain, Cpanel, WHMCS, Plesk, Vesta DB: MySQL/MariaDB, MongoDB, PostgreSQL, Radis, SQLite, Oracle Development: VueJS, NuxtJS, React, NextJS, Electron, Express, Shell Scripting Mail Server: Zimbra, iRedMail, MailCow, Spam mail issue resolving Migration/Deployment: WordPress, Ghost, Django, React, Vue, Express, Ruby on Rails, Laravel Open Source: Owncloud/NextCloud, Mattermost, Rocket.Chat, Jitsi, Bitwarden, Metabase, Botpress, Authentik.... any Open Source projects CI/CD: Gitlab, Github, Jenkins Network solution | Security | Each and every Linux issue resolving You can directly order some services: Jitsi Meet, Mattermost, Rocketchat, Matrix, Nextcloud, ownCloud, cPanel, Plesk, Vesta, Bitwarden, Metabase, Botpress, Gitlab, Zimbra, iRedMail, Mailcow, WordPress Ping me to discover new edge, together we can achieve more..!

Hello! I am a highly skilled Linux Systems Administrator with over a decade of experience in managing various permanent and project-based organizations. Throughout my career, I have excelled in implementing and maintaining robust infrastructure and applications. I provide comprehensive assistance in configuring and resolving issues with your Linux system, catering to all your hosting, mail, web, DevOps, and cloud needs. My Services: Linux System Configuration for Hosting: I'll meticulously configure your Linux system for robust hosting environments, including web servers, database servers, and essential services. Expect optimal performance, enhanced security, and seamless scalability. Mail Server Configuration: Rely on my expertise to set up and configure mail servers on your Linux system using popular mail transfer agents (MTAs) like Postfix, Exim, and Sendmail. I'll streamline your email system with domain-based routing, effective spam filtering, and DKIM/SPF/DMARC authentication. Web Server Configuration: I specialize in configuring renowned web servers (Apache, Nginx, LiteSpeed) on your Linux system. Enjoy optimal performance, robust security, and unwavering reliability for your web server. Troubleshooting and Debugging: Count on my swift expertise to diagnose and resolve Linux system issues related to hosting, mail, web, DevOps, or cloud operations. I possess the necessary tools and proficiency to effectively troubleshoot and debug your Linux system, addressing software conflicts and performance concerns. Security Hardening: I will implement best practices for securing your Linux system, including user accounts, firewalls, patches, and other security measures. Performance Optimization: I will fine-tune settings, optimize services, and identify performance bottlenecks to improve system performance. Custom Linux Solutions: I can create custom solutions tailored to your specific requirements. DevOps Configuration: Seamlessly integrate DevOps tools and practices into your Linux system. I'll configure version control systems (e.g., Git), establish CI/CD pipelines, enable containerization with Docker, and orchestrate operations using cutting-edge tools like Kubernetes. Cloud Configuration: Entrust me with configuring your Linux system for cloud environments (AWS, Azure, GCP, etc.). I'll expertly set up virtual machines, networking, storage, and other crucial cloud services, ensuring flawless application operation in the cloud. Why Choose Me? - 15 years of experience in Linux system administration. - In-depth knowledge of various Linux distributions. - Quick and efficient troubleshooting skills. - Strong commitment to security best practices Don't let Linux system configuration and troubleshooting for hosting, mail, web, DevOps, and cloud operations hinder your progress. Allow me to handle it for you! Get in touch now to discuss your Linux system needs and experience seamless operation in your hosting, mail, web, DevOps, or cloud environment.