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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 keep business-critical systems running on Linux servers. Twelve years of experience. I cover a range of services, but it's really one discipline: infrastructure, that stays up. WHAT I DO Linux server administration. VPS setup, hardening, performance tuning, recovery, and ongoing care on AWS, DigitalOcean, Hetzner, Vultr, cPanel/WHM and others. Firewalls, SSL, backups, monitoring. The boring work that keeps everything else possible. Self-hosted automation and AI infrastructure. I deploy n8n on hardened Linux servers (Docker, reverse proxy, SSL, automated backups) so you own your automation instead of renting it. I also build private AI stacks with Ollama, OpenWebUI, and local or API-connected LLMs, for teams that want AI capability without handing their data to a third party. Website and email migrations. Files, databases, DNS, SSL and mailboxes moved cleanly between hosts. Hundreds completed over the years. The rule is simple: nothing breaks, nothing goes missing. WordPress and phpBB. Installs, fixes, malware cleanup, upgrades, long-term care. I've been a go-to phpBB specialist on Upwork for years, including an 18-month engagement keeping a production community forum healthy. WHY CLIENTS STAY Most automation specialists build on cloud platforms you don't control and can't leave. I build on infrastructure you own. Your server, your data, your system. And I treat it the way a sysadmin should: monitored, backed up, documented, and maintained so it keeps running after I hand it over. 100% Job Success across 149 jobs, repeat clients going back years, and work ranging from small business rescues to a LAMP/REST API deployment on AWS for an Upwork enterprise client. HOW I WORK I scope honestly before we start. If something is outside what I do (app development, SEO, design) I'll tell you upfront. Hourly with the Upwork tracker for open-ended work. Fixed price when the scope is tightly defined. If something I set up breaks within days of handover because of my work, I fix it for free. I'm flexible with times. Can work when the it is best for your project, e.g. off-peak hours. If your server, site, forum or automation needs to work every day and not just on launch day, message me and tell me what's going on.

Are you looking for a Full-Stack Developer who can build your application, develop mobile apps, and deploy everything on a production-ready VPS? You’re in the right place. I’m a Full-Stack Developer with 9 years of professional experience in PHP, Laravel, JavaScript, Vue.js, Angular, Ionic, and Capacitor. I have experience developing business applications, ERP systems, REST APIs, e-commerce platforms, and cross-platform mobile applications. I also have hands-on experience with Linux/VPS server configuration and production deployment, so I can handle not only application development but also the server-side requirements needed to get your application running reliably. 🚀 What I Can Help You With ------Web & Full-Stack Development------ * Laravel / PHP application development * Vue.js / JavaScript / TypeScript * Angular * React JS * Livewire * REST API development & integration * ERP and custom business applications * E-commerce development * WordPress customization ------📱 Mobile App Development ------ * Ionic * Capacitor * Cross-platform Android & iOS applications * Mobile API integration * Web + Mobile application development ------🖥️ VPS, Linux & Deployment ------ * Ubuntu/Linux VPS configuration * Nginx / Apache * PHP & Composer setup * MySQL / PostgreSQL database configuration * Laravel application deployment * Domain & SSL/HTTPS configuration * Git/GitHub deployment * Cron Jobs & Laravel Scheduler * Queue & Supervisor configuration * Server troubleshooting and migration 🛠️ Technologies Backend: PHP, Laravel, CodeIgniter, REST API Frontend: Vue.js, Angular, React JS, JavaScript, TypeScript, Livewire,, Tailwind CSS, Bootstrap, HTML5 Mobile: Ionic, Capacitor, Android, iOS Database: MySQL, PostgreSQL, Oracle, MongoDB DevOps & Server: Linux, Ubuntu, VPS, Nginx, Apache, Docker, GitHub Actions, CI/CD Other: WordPress, Oracle EBS 💼 Business Application Experience I have experience working on large-scale business systems, including ERP solutions for the RMG/garments and textile sector. This experience has helped me understand not only the technical side of development, but also real-world business workflows, data management, user roles, reporting, and application maintenance. Why Work With Me? Clear Communication: I keep clients updated and communicate technical issues in a simple and practical way. Problem Solving: I focus on solving the actual business problem, not just writing code. Full Project Support: From development and API integration to mobile apps, VPS configuration, deployment, and troubleshooting, I can support the complete application lifecycle. Quality & Reliability: I focus on maintainable code, stable deployments, and solutions that can grow with your business. If you have a web application, mobile app, Laravel project, ERP system, API, or VPS deployment requirement, feel free to send me the details. I’d be happy to discuss your project and suggest the best approach.

I am an experienced server system administrator, currently have 3.5+ years of experience. As an open-source contributor and also working with Linux, DevOps and Cloud, I can give proper solutions to problems. I also have experience in Web Development and Database management. Highlighted Skills ================================= ✅ System Administration ✅ Docker & Kubernetes ✅ DevOps & Cloud Computing ✅ AWS, Azure & GCP ✅ Raspberry Pi & SBCs ✅ Database Administration ✅ Scripting & Automation ✅ Operating Systems ✅ Network Administration ✅ Full Stack Development ✅ WireGuard, Tailscale & OpenVPN Programming Languages ================================= ✔️ Python ✔️ JavaScript ✔️ C, C++, PHP ✔️ Bash/Shell ✔️ HTML, CSS

Need a backend, full-stack, or AI system that holds up in production, not just on a demo branch? That's what I do. I'm a senior software engineer with 6+ years building web apps, desktop products, data platforms, and enterprise integrations for clients in the US, Canada, and Europe. Clients usually come to me with one of these problems: - "Our API is slow or falls over under load." I profile it, fix the queries and caching, and add retries, idempotency, and monitoring so failures stop reaching your users. - "We need a real product, not a prototype." Secure auth, roles and permissions, billing, background jobs, licensing, automated tests, and CI/CD are part of the build, not a phase two. - "We want AI over our own documents but it keeps answering wrong." I build RAG pipelines with hybrid search, reranking, and measured retrieval quality so answers are traceable. - "Our legacy mainframe code needs to run somewhere modern." I deploy and repair COBOL/CICS/DB2/JCL systems on z/OS and IBM Cloud. WHAT I WORK WITH Backend: .NET Core, Python, FastAPI, Node.js, REST APIs, Clean Architecture, CQRS, Kafka, MassTransit, SignalR, Hangfire Frontend: Angular, React, Next.js, TypeScript, RxJS, NgRx, Tailwind, Material UI Data: PostgreSQL, SQL Server, MongoDB, Redis, Qdrant, pgvector AI: RAG, LangChain, OpenAI, Cohere, hybrid vector + BM25 search, reranking, evaluation Cloud and DevOps: AWS, Azure, IBM Cloud, Docker, GitHub Actions, Azure DevOps, xUnit, pytest Mainframe: z/OS, COBOL, CICS, DB2, VSAM, JCL WHAT I'VE DELIVERED - A multi-tenant vendor risk platform covering supplier onboarding through audits and remediation, with enterprise SSO, granular permissions, Stripe billing, and AWS deployment. - Three years on a freight-forwarding ERP: 1,000+ endpoints, 25+ carrier and accounting integrations, and the full rate-to-shipment lifecycle. - A licensed Windows and macOS desktop product with signed entitlements, offline grace periods, and crash-recovery testing. - A multilingual vehicle-manual chatbot with intent classification and an automated retrieval-evaluation harness. - Technical leadership of a 6-developer team across architecture, estimation, and releases. HOW I WORK I plan carefully before writing code, clarify anything that is unclear, and provide an honest estimate before development begins. I will also tell you early if an approach is risky or unlikely to work. You will receive working increments that you can review throughout the project - not a month of silence followed by unexpected results. I always take ownership of project and meet the deadline I commit to. I have maintained a 100% Job Success Score and delivered more than 2,400 hours of work on Upwork. Some of my project details are in my portfolio and work history below. Send me your requirements, and I will reply with a clear technical approach, the main trade-offs, and a realistic delivery timeline.

Hello! I'm Milon Hossain With over a decade of expertise in web development and Linux system administration, I bring a versatile skill set and a history of successful projects. My journey began with WordPress, where I crafted diverse websites, including portfolios, blogs, and e-commerce sites. I've also supported nonprofit and trust-based initiatives in establishing their online presence. Beyond WordPress, my skills span various technologies. I've secured Linux VPS environments, tackled Node.js and other tech stack application challenges on Linux servers, managed server backups, and executed seamless data transfers to cloud servers. My proficiency extends to DNS and email server configurations, as well as Docker containerization and CI/CD pipeline implementation. I'm excited to discuss how my experience can contribute to your business's online success. Let's have a discussion and explore the possibilities. I'm interested in both short/qucik projects as well as long term business relationships. Regards :)