Currently, I am a full-stack developer with expertise in Go and over seven years of experience in creating CLI programs, desktop GUI applications for Linux and Windows, as well as mobile and web applications using Flutter (Dart). Additionally, I bring over 15 years of experience in other programming languages, including C/C++, PHP, and JavaScript (React, Vue), alongside extensive knowledge of networking spanning more than 15 years.

With 4+ years of hands-on experience and 70+ successful projects on Upwork, I help businesses keep their servers, SaaS platforms, and cloud infrastructure running securely, reliably, and efficiently. I specialize in end-to-end system administration and technical support, from resolving urgent server issues to managing day-to-day SaaS operations. Whether you need a quick fix, ongoing service desk coverage, or long-term infrastructure support, I deliver enterprise-grade results with clear communication. 🛠️ Core Expertise Service Desk & SaaS Support: Google Workspace, Asana (including automations), Slack, Zoom, and cloud apps Server & Hosting Administration: Linux (Ubuntu, CentOS, Debian), WHM/cPanel, Contabo, AWS, Hetzner, OVH DNS & Email Systems: Domain setup, DNS records, MX/SPF/DKIM, email troubleshooting, migrations Security & Compliance: SSL/TLS (Let’s Encrypt, custom certificates), firewall setup, system hardening, malware removal WordPress & Web Platforms: Plugin management, updates, migrations, uptime monitoring Automation & Efficiency: Bash scripting, Ansible, Make (Integromat) integrations 📊 What Clients Say ⭐ “Muhammad saved us from an emergency situation. He resolved the issue almost instantly and saved the day.” ⭐ “He is more than your average freelancer — really smart, knows Linux in-depth, and communicates clearly.” ⭐ “The only freelancer who read my job offer carefully and delivered a professional solution. Highly recommended.” ✅ Why Work With Me Reliability: 91% Job Success and consistent 5⭐ reviews Speed: Average response time under 24 hours, emergency fixes in minutes Professional Background: BS in Cybersecurity + Senior Systems Engineer experience managing 50+ client environments Availability: 30+ hours/week, aligned with client time zones 📞 Let’s Work Together Whether you need ongoing service desk leadership, SaaS platform support, or secure server management, I bring the technical expertise and proactive approach to keep your systems stable and your team productive.

Senior System Administrator specializing in Microsoft 365, Active Directory, AWS, and enterprise infrastructure reliability. For the past 4 years, I've been the sole infrastructure consultant supporting production systems for Revalize LLC (USA), managing customer-facing enterprise environments where downtime directly impacts revenue. Alongside this long-term enterprise infrastructure ownership, I've delivered migration and remediation projects for 20+ organizations across SaaS, manufacturing, and professional services. Core expertise: - Microsoft 365 migrations & hybrid Exchange - Active Directory & Windows Server administration - AWS cost optimization & infrastructure reliability - PowerShell automation & process optimization - Disaster recovery & business continuity Clients typically bring me in when: → Migration projects have stalled or lack expertise → Active Directory or mail infrastructure becomes unstable → Production environments lack documentation or monitoring → Infrastructure costs are growing unexpectedly → Internal teams cannot safely troubleshoot production systems Recent project outcomes: → Migrated 500+ users from Exchange 2016 to Microsoft 365 with zero email downtime during 72-hour cutover → Reduced AWS infrastructure costs by 30% ($47K annually) through EC2 rightsizing and Reserved Instance strategy → Restored multi-site Active Directory replication affecting 450+ users across 3 locations within 8 hours → Recovered a non-booting domain controller with SYSVOL/DFSR failures in 6 hours, preventing an authentication outage → Automated user onboarding workflows, reducing provisioning time from 2 hours to 10 minutes Microsoft 365 & Exchange - Exchange Online & hybrid Exchange migrations - Tenant-to-tenant migrations - Hybrid identity (Entra ID / Azure AD) - SharePoint & Teams administration - SPF / DKIM / DMARC configuration - Intune device management & endpoint compliance policies - MFA enforcement, Conditional Access, and Microsoft 365 governance - Exchange sync troubleshooting & mailbox recovery Active Directory & Windows Infrastructure - Domain controller recovery & SYSVOL/DFSR replication repair - Multi-site domain controller deployments - Group Policy management & troubleshooting - FSMO role management & transfer - Hybrid AD environments (on-premises + Entra ID) - Windows Server 2012 R2 through 2022 administration AWS & Cloud Infrastructure - Cost optimization & infrastructure analysis (40-60% average reduction) - EC2 rightsizing & Reserved Instance strategy - RDS performance tuning & elastic pool optimization - CloudWatch monitoring & proactive alerting - VPC design & auto-scaling configuration Infrastructure Reliability & Operations - Disaster recovery planning & backup validation - Production change management & operational handoff - 24/7 emergency support for production infrastructure incidents - Flexible timezone coverage (US, UK, Australian business hours) Additional experience includes VMware vSphere, Hyper-V, Fortinet/pfSense networking, Veeam/Commvault backup solutions, and enterprise ITSM platforms including ServiceNow and JIRA. Certifications: → AWS Certified Solutions Architect – Associate → Microsoft 365 Certified: Fundamentals (2024) → MCSA: Windows Server 2016 → Fortinet NSE 1 & NSE 2 Network Security Clients value reliability, communication, and operational accountability just as much as technical execution. If you need an experienced infrastructure engineer to stabilize, migrate, optimize, or maintain production systems, send me: → Current infrastructure overview (platform, user count, pain points) → Project goals and timeline → Any existing documentation or error logs I respond within 24 hours with a project assessment and approach. Available for scheduled migrations, infrastructure remediation, and urgent production recovery engagements.

I have been in the IT field for over a decade now and have learned and grown in that time. I currently hold multiple industry certifications and am constantly learning new information. I have a very wide range of skills to offer. I have managed Linux servers, Windows servers, Active Directory, and much more. I am also very skilled in networking and security. I worked on a project migrating a site that was in 3 buildings into one new building. This involved configuring a network from the ground up for the new building. The company had around 800 Cisco switches.

I help businesses move faster and smarter by combining 15 years of DevOps and information security expertise with cutting-edge AI automation. Whether you need a fully autonomous AI agent, a multi-step LangChain pipeline, an n8n workflow that saves your team hours every week, or a production-ready CrewAI setup — I deliver reliable, secure, and scalable solutions. ⭐ What I Build for You • AI Agents & Agentic Workflows — LangChain, AutoGen, CrewAI, OpenAI Assistants API • No-Code / Low-Code AI Automation — n8n, Zapier, Make with GPT-4 / Claude integration • RAG Pipelines — custom knowledge bases, vector databases (Pinecone, Weaviate, ChromaDB) • MLOps & AI Infrastructure — model deployment on AWS / GCP / Azure, Docker, Kubernetes • CI/CD for AI — automated testing, deployment pipelines for ML models and AI applications • Secure AI Integrations — API security, prompt injection protection, compliance-ready deployments 🛡️ Why Clients Choose Me Over Other AI Freelancers Most AI developers can write a script. I engineer production systems. My DevOps background means every AI solution I deliver is containerised, monitored, version-controlled, and actually maintainable by your team. My security expertise means your data stays safe and your AI integrations meet compliance requirements from day one. You get an AI engineer who thinks end-to-end — from the prompt to the pipeline to production. 💼 My Background at a Glance • 15+ years in DevOps, Cloud Infrastructure, Information Security, and IT Compliance • Hands-on with LangChain, AutoGen, CrewAI, OpenAI API, Anthropic Claude API, Hugging Face • Automation workflows with n8n, Zapier, Make (Integromat), and custom Python scripts • Cloud-native deployments: AWS (EC2, Lambda, Bedrock), GCP, Azure, Docker, Kubernetes • ISO 27001, SOC 2, GDPR, HIPAA-aligned practices built into every solution If you want an AI integration that actually works in production — not just a demo — let's talk. Send me a message describing your project and I will get back to you within a few hours.

With 10+ years of experience working in Upwork and various Microsoft certification such as MCSA Server 2008R2, MCITP Server 2008R2, MCTS Active Directory, MCTS Network Infrastructure, Hyper-V Virtualization etc. I work as a Windows System Administrator from the peace of my own home/office to troubleshoot technical problem with your windows Client/ Server PC. I am an expert in: - Windows Server 2008R2/2012R2/2016/ 2019 Technologies; - Virtualization: Hyper-V & vSphere (5.0-6.5); - P2V & V2V Migration; - All infrastructure services: AD DS, DNS, DHCP, File Server, Print Server, Remote Desktop Services, WSUS etc.; - Clustering - Windows Native Backup, Veeam Backup, Carbonite Backup, Acronis Backup etc. - TCP/IP Networking - Customer Support and Service via Email, Zendesk Ticketing system - Helpdesk Support for Windows and Mac. - New Office 365 Tenant setup, manage and support. - Migration of emails from other platforms to Office 365. - Microsoft Teams Setup - Sharepoint Online setup - Providing technical support to Windows Server/Client under domain environment, resolve networking problem within your network. - Microsoft Retail Management System and SQL server administration. - VMware Administration. - Hyper-V Administration You probably also have noticed the feedback and Microsoft Certifications on my profile to backup my claims. I also assure you that I only charge if you are satisfied with my service and your technical problem is resolved as you want it to. If you want trustworthy, reliable Remote System Administrator who is well versed in Microsoft Technologies, please feel free to invite me to apply for a job. I look forward to hearing from you!

I am an Embedded Linux Firmware Developer with a Full Stack Web Development experience of 7+ years. Below are essential skills I have been working on. - C/C++ - IoT, STM32, Arduino, Raspberry Pi, Orange Pi, Microchip, ESP32, NodeMCU and Sensors - Laravel, CodeIgniter, Node.js, Express.js, React JS, HTML5, CSS, JavaScript, jQuery, PHP, MySQL, MongoDB - Linux, OpenWrt, - End-to-end Cloud Wi-Fi and Captive Portal solution / Coova Chilli / Radiusdesk - Proxy Servers, Load balancer and Multiple VPNs including OpenVPN, Wireguard and IPSec - Network Stacks and protocols (Ethernet, Wireless, SNMP, ICMP, FTP, SSH, VLANs, firewall, TCP/IP, MPTCP etc) - Building and integrating RESTful APIs - Profound experience and technical knowledge of the LAMP stack - Linux / AWS - Cloud and client side software applications - Arduino and development of Arduino shields, C applications, Automation, Shell scripting - Networking

I help CTOs and founders ship faster, cut infrastructure spend, and sleep better at night. With 15+ years in production operations, I design, harden, and automate Linux-based systems across AWS, Google Cloud, and DigitalOcean, delivering reliable, secure, and cost-efficient platforms for healthcare, finance, and public-sector teams. WHY CLIENTS HIRE ME 1. Proven enterprise trust (Top Rated Plus): large, successful contracts; consistent 5-star outcomes 2. Operational excellence: 99.9%+ uptime architectures, zero-/near-zero-downtime migrations, robust rollback plans 3. Real savings: helped clients reduce infra costs by $700K+ through right-sizing, consolidation, and automation 4. Security first: layered hardening (WAF, iptables, DNSSEC), least-privilege access, audit-ready logging WHAT I DELIVER - DevOps & Automation: CI/CD, immutable builds, environment parity; Ansible & Bash at scale - Cloud & Containers: design/ops on AWS | GCP | DigitalOcean; Docker & Kubernetes (incl. k3s) for resilient apps - Web & Networking: Nginx/Apache tuning, HA, SSL/TLS, Bind9/DNS, HAProxy load balancing - Email & Deliverability: Postfix, Zimbra, Mautic, Postal; SPF/DKIM/DMARC alignment and sending infrastructure - Monitoring & Reliability: CheckMK and Zabbix visibility, alerting that reduces MTTR Message me with your current stack and goals, I’ll propose a lean plan that reduces risk, controls cost, and gets you to green faster.

Expert in Email Configuration, Authentication & IT Systems Administration | 11+ Years Experience I am a highly skilled IT Systems Administrator with 11+ years of experience in email configuration, authentication, deliverability, domain management, and IT infrastructure. I specialize in setting up, managing, and troubleshooting business email systems, ensuring secure, high-deliverability email communication. 💡 Email System Configuration & Management ✔ Google Workspace (Gmail for Business), Microsoft 365 (O365), Zoho Mail and many other email platforms. ✔ Mailgun, SMTP, Postfix, Exim & Other Email Relay Services ✔ Transactional & Marketing Email Setup (Mailgun, SendGrid, Instantly.ai, Lemlist, etc.) ✔ Custom Email Domain Setup, Migration & Troubleshooting 🔐 Email Authentication & Security ✔ SPF, DKIM, DMARC Implementation & Optimization ✔ BIMI & MTA-STS Setup for Brand Protection ✔ Reverse DNS (PTR Records) & Dedicated IP Configuration ✔ SMTP Authentication & Secure Email Protocols (TLS, SSL) 🚀 Email Deliverability & Optimization ✔ Inbox Placement & Avoiding Spam Filters ✔ IP Reputation Monitoring & Blacklist Removal ✔ Domain Warm-up & Cold Email Best Practices ✔ Google Postmaster Tools & Microsoft SNDS Configuration 🌍 Domain Management, DNS Setup & Hosting Services ✔ Domain Registration & Transfer Management ✔ DNS Configuration (A, CNAME, MX, TXT, SRV, PTR Records) ✔ Hosting Setup & Migration (cPanel, Plesk, Cloudflare, AWS, etc.) ✔ CDN Integration & Performance Optimization 🖥️ IT Infrastructure & Systems Administration I also have deep expertise in IT systems administration, virtualization, and troubleshooting, including: ✔ Microsoft Windows Server (Setup, Management & Troubleshooting) ✔ Microsoft Hyper-V & VMware (Virtualization & Failover Clustering) ✔ WSUS (Windows Server Update Services) for Patch Management ✔ Linux OS Installation & Server Configuration ✔ Remote IT Support for Windows, Linux & VMware With my proven track record in IT infrastructure, email solutions, and domain management, I help businesses streamline operations, secure communication, and optimize system performance. 💬 Let’s discuss how I can improve your email setup, IT systems, and domain management!

Education: I have graduated as a an Electrical-Electronical Engineer from METU University with a 'honour accomplishment' Work History: Long running work history at the same company-group on customer support and consultancy areas until 2023. Now I am working as an independent IT consultant. Skills: Microsoft enterprise infrastructure products including Active Directory Domain Services/Certificate Services, Exchange Server, Windows Network Components: NPS / DNS / DHCP / IAS , Failover Cluster - Business Continuity.