Hire the Best Windows Freelancers
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✅ ABOUT ME: I am a Professional Full Time Freelancer. I have 8+ years of experience working on Windows/Linux server administration, CICD Devops ,AWS, Azure, windows/Linux troubleshooting, HyperV, proxmox servers, DNS records mapping, IIS, Domains and DNS records management, active directory, web server, webhosting, databases administrations and Mail server implementations, administrations for the mail services MS Office365, Gsuite, Zimbara and postfix . ✅ WHY ME? • Full-time Professional – I work on Upwork as a full-time freelancer. I take every project seriously and I am highly professional. • Highly responsive – I’ll always get back to you in less than 02 hours. • 100% Client satisfaction – I provide revisions and modifications even after our contract ends. • I provide accurate solutions and just as important, I can guide you to future prospects and put your project on the right track. • Good communication skills – You will find me very friendly to talk to. ========================================= #Windows Servers - clients #Linux Server - clients #Web servers - IIS, Apache, XAMPP, Nginx and Tomcat #Database Servers - MSSQL, ORACLE, MYSQL, MongoDB #Webhosting tools- Plesk, cPanel and CWP #Cloud services providers - AWS, Azure, GCP, Digital Ocean, World stream, OVH Cloud, Hetzner and Hosting raja #Hosting providers - Hostinger, Bluehost, Namecheap, Godaddy, Bigrock and Hostgator #Active Directory - setup, users creation, Centralized Management, policy creation and enhanced Security #Troubleshooting - L1, L2 Tools used ============== Github, SVN IIS,Apache,Tomcat,Nginx , Apache Kafka and Wordpress SSH, RDP, VNC, Anydesk, Splashtop and screen connect Mobaxterm,Toad,SSMS and Workbench Plesk,WHM,Cpanel Active Directory, IAM Servicenow, Redmine, Microsoft Teams and Slack Previous Clients Feedback: 1- "Karthik was an exceptional Upworker to deal with. He was responsive, communicative, knowledgeable and proactive at solving my urgent technical issue (my businesses website was down for an unknown reason) and I wouldn't hesitate to recommend him to anyone else seeking an excellent technical support specialist. Thank you Karthik!" 2- "Karthik went above and beyond to progress with a very difficult issue in a very short period of time. He is kind, hard-working, and knowledgeable." 3- "I recently had the pleasure of working with "Karthik Raja" on installing PMB Software project, and I must say it was an outstanding experience from start to finish. I highly recommend "Karthik Raja" to anyone seeking top-notch freelancing services." 4- "he provides ideas to solve our problems he is a best gem have ever met. He focused only in customer satisfaction. no negative reviews." So why wait? Just invite me to your job on Upwork so we can discuss how to make your project a success. Let’s work together and get it done!! Thanks, Karthik

I am an experienced IT Infrastructure Engineer with 15+ years of hands-on expertise in designing, deploying, and managing enterprise IT environments. My specialization includes Windows Server, Active Directory, Hybrid AD with Entra ID, Microsoft 365, Exchange Server, Azure, AWS, and Virtualization. I help businesses modernize their IT infrastructure end-to-end — from on-premises servers and virtualization platforms (VMware/Hyper-V) to hybrid cloud integrations, Azure AD/Entra ID deployments, and modern desktop architecture. I focus on delivering secure, scalable, and resilient hybrid IT solutions that enhance productivity, security, and compliance while supporting business growth. Technical Expertise 🗄️ Windows Server & Active Directory ✅ Install, configure, and manage Windows Server 2003–2025 ✅ DFS, DNS, DHCP, RDS, IIS, RAID, NAS ✅ Group Policy Objects (GPOs), AD replication, backup & restore ✅ Active Directory migrations & consolidations (domains/forests) ✅ Identity Services: ADFS, Azure SSO, MFA, SAML, OAuth, OpenID ✅ AD Security Auditing: BloodHound/SharpHound, Kerberoasting, ZeroLogon ☁️ Microsoft 365 & Cloud Services ✅ Administration of Exchange Online, SharePoint, OneDrive, Teams ✅ Domain & DNS setup: SPF, DKIM, DMARC, MX ✅ Security & Compliance: Defender for Endpoint & O365, DLP, Conditional Access, Sensitivity Labels, Azure Security Policies ✅ Tenant-to-tenant migrations: BitTitan, CodeTwo, SkyKick ✅ Hybrid Deployments: Exchange + O365, ADFS, Azure AD/Entra ID Connect ✅ Modern Workplace Management: Intune, Autopilot, Co-management, Windows 10/11, Windows 365/Cloud PC 🏢 Virtualization & Cloud Platforms ✅ VMware: ESXi, vCenter, vMotion, DRS, HA, NSX, vSAN, vROps ✅ Hyper-V: deployment, migration, clustering, Azure Stack HCI ✅ Azure Virtual Machines | VM Scale Sets | Availability Sets & Zones | ARM Templates | NSGs | Azure Bastion | Load Balancer | Azure Monitor | Backup & Site Recovery | Automation & Auto-Scaling | Hybrid VM Integration | High Availability | Cost Optimization ✅ AWS: IAM, EC2, S3, CloudFormation, cloud migrations 🔒 Security & Vulnerability Management ✅ Penetration testing & vulnerability scanning (Nessus, Qualys, Kali Linux) ✅ Remediation of Windows & AD vulnerabilities (SMB, PrintNightmare, LDAP signing) ✅ Zero Trust Security implementation & Identity Governance ✅ Backup & disaster recovery (StorageCraft, NAS, SkyKick, Quest Recovery Manager, DRaaS) ⚡ Automation & RMM Tools ✅ PowerShell scripting & DSC automation ✅ Graph API & Microsoft 365 automation ✅ RMM tools: Intune, Datto RMM, ConnectWise, NinjaOne, ManageEngine ✅ Endpoint management, application deployment & compliance 📞 Collaboration & Messaging ✅ Teams Phone System & Direct Routing ✅ Exchange Hybrid Architecture & migrations ✅ PBX integration 🏆 Why Work With Me / Achievements / Key Results 🏅 Upwork Top-Rated Expert – recognized for delivering high-quality IT infrastructure and cloud solutions 🏅 Certified IT Infrastructure Expert – Microsoft, Azure, AWS, VMware, and Security certifications 🏅 23K+ hours worked – extensive hands-on experience with diverse enterprise projects 🏅 $400K+ earned – proven track record of client satisfaction and successful project delivery 🏅 Enterprise & Cloud Expertise – implemented hybrid AD, Azure, Microsoft 365, VMware, and AWS solutions for multiple organizations 💡 Online Consultation Available ⭐ Review your IT environment ⭐ Identify challenges & solutions ⭐ Create a custom step-by-step action plan 📅 Schedule your consultation directly on Upwork at your convenience. Whether you need full project delivery or expert guidance, I ensure your IT infrastructure is secure, efficient, and optimized for growth.

I am a Windows Desktop Application Developer with over 12 years of experience developing applications using WPF and WinForms, specializing in POS systems, ERP, CRM, Inventory Management, and custom plugin development for MS Office, AutoCAD, and Rhino 3D across various industries. From automating manual Excel workflows and converting Excel-dependent businesses into automated Windows Desktop tools, to integrating hardware devices using TCP/IP, USB, and Serial Port protocols with Windows applications for data tracking, inventory operations, and real-time hardware feeds, I build tailored solutions that streamline day-to-day business operations. Depending on your project requirements, my applications can be fully localized using native databases like SQLite, or connected to cloud servers using SQL Server. In addition, I develop custom plugins for MS Office (Outlook and Excel) using WinForms/WPF, as well as specialized plugins for tools like AutoCAD and Rhino 3D to deliver custom features not available out of the box from Autodesk or Rhino 3D. For UI development, I extensively use DevExpress to build modern, user-friendly interfaces for Windows applications. In addition to DevExpress, I have worked with Blazor and Telerik whenever required. Alongside desktop application development, I also work on .NET web applications using ASP.NET MVC with React frontends. I have built end-to-end setups where desktop applications connect to cloud servers and communicate seamlessly with web apps hosted on the same server to display real-time data.

I am a .NET (C#) full stack developer. Asp.net core, .net maui, .net blazor and Azure. The Database technologies I have experience in are LiteDB, Sqlite, PostgreSQL and MongoDB.

Hi, I’m KavinKumar. I’m a detail-oriented freelancer specializing in photo editing, photo enhancement, game testing, and app testing. In photo editing, I focus on improving image quality, adjusting lighting, enhancing colors, and making sure every image looks clean, professional, and visually appealing. Whether it’s for social media, e-commerce, or personal use, I ensure high-quality results with a quick turnaround. Along with that, I also work in game and app testing. I test for usability, performance, and bugs to make sure the user experience is smooth and error-free. I provide clear feedback and detailed reports that help improve the overall quality of the product. I’m reliable, easy to communicate with, and always focused on delivering the best results for my clients. If you’re looking for someone who can enhance your visuals or test your product effectively, I’d be happy to work with you. Thank you!

As a dedicated and customer‑focused IT Specialist, I deliver end‑to‑end cloud, infrastructure, and security solutions that help businesses stay productive, secure, and future‑ready. With 14+ years of hands‑on experience across Microsoft 365, Azure, Intune, Windows Server, and enterprise security, I ensure every client receives reliable, efficient, and scalable IT outcomes. My approach is simple: 👉 Maximize uptime 👉 Strengthen security 👉 Enhance user experience 👉 Deliver consistent, proactive IT support 🔹 Core Areas of Expertise ☁️ Cloud & Modern Workplace Microsoft 365 / Office 365 Administration Exchange Online, Teams, SharePoint, license management, and tenant optimization. Exchange Online Migration Cutover, Staged, and Hybrid migrations — seamless mailbox transfers with zero downtime. Azure Cloud Services Virtual Machines, Web Apps, Storage, Recovery Services Vault, Service Bus, and cost optimization. Azure Active Directory (AAD) Secure identity management with Conditional Access, MFA, SSO, and role-based access. Microsoft Intune / Endpoint Manager Device compliance, security baselines, configuration profiles, app deployment, and mobile device management. Windows Autopilot Zero‑touch provisioning, standardized device rollout, automation, and endpoint readiness. Email Security Anti‑spam/anti‑phishing configuration, Defender for Office 365, DKIM, DMARC, SPF hardening, and secure mail flow. G Suite / Google Workspace Setup, migration, administration, and workflow improvements. 🏢 On-Premises Infrastructure Windows Server (2003–2025) – Installation, configuration, patching & optimization Active Directory Domain Services (ADDS) – Group Policy, DNS/DHCP, domain hardening RDS (Remote Desktop Services) – Secure remote access setup WDS (Windows Deployment Services) – Automated OS deployment File, Print & Application Servers – Centralized, secure, and optimized configurations Desktop Support (L1–L3) – Fast & proactive issue resolution for all end-user environments 🔒 Network & Security Solutions Firewall Configuration & Management Expertise in WatchGuard, Fortinet, security policies, VPN, traffic rules, and threat prevention. Azure Security Center & Microsoft Defender Threat analytics, vulnerability management, secure score improvements, and compliance enforcement. Backup & Recovery Solutions DPM, Symantec Backup Exec, Windows Server Backup, Datto, MSP360 — complete continuity planning. Access Control & System Hardening BitLocker, GPO security, RBAC, and best-practice-driven security design. ⚙️ Additional Skills Server & Network Performance Optimization Virtualization & Hybrid Cloud Integrations (On‑prem + Azure) Incident, Problem & Change Management (L1/L2/L3) Root Cause Analysis & Long-term Fix Implementation 🚀 Why Work With Me? ✔️ 12+ years of real-world IT experience ✔️ Strong Microsoft 365 & Azure technical background ✔️ Proven ability to design secure, stable & high-performing infrastructures ✔️ Excellent communication, documentation, and client service ✔️ Commitment to reliability, transparency & continuous improvement 🤝 Let’s Work Together Whether you need Exchange Online migration, Autopilot deployment, Microsoft 365 management, Azure setup, firewall configuration, Windows Server optimization, or ongoing tech support, I can help you build a secure, efficient, and future-ready IT environment. 📩 Let’s connect and elevate your IT infrastructure to the next level.