System Administrators Para Contratação
Países
Localização específica
Exames
Remuneração por Hora (Dólares)
Avaliação
On-line
Mostrando 212 resultados
Freelancers Patrocinados
-
Contratar engkarimismail
engkarimismail engkarimismail
$50 Dólares / hora
✅Senior Network & System Engineer | Security|VOIP✅Malaysia✅ About Me I am an experienced IT professional with expertise in server administration, networking, virtualization, and security. My skill set spans managing server operating systems, configuring directory services, implementing DNS/DHCP solutions, and deploying virtualization platforms. I have a strong background in...✅ About Me I am an experienced IT professional with expertise in server administration, networking, virtualization, and security. My skill set spans managing server operating systems, configuring directory services, implementing DNS/DHCP solutions, and deploying virtualization platforms. I have a strong background in firewalls, scripting, containerization, and database management. Additionally, I specialize in mail servers, backup systems, and cloud technologies. With advanced networking skills, including Cisco routing, VLAN management, VoIP/IP telephony, and penetration testing, I am well-equipped to handle complex IT infrastructures. I am dedicated to delivering reliable solutions, ensuring data integrity, and enhancing system performance. ✅Send me now 24/7 Availability Unlimited Revisions Fast Response ✅ Server Operating Systems Windows Server (2003 to 2024) | Ubuntu | CentOS | Debian | RHEL ✅ Directory Services Active Directory | OpenLDAP ✅ DNS and DHCP Windows Server DNS | DHCP | Linux DNS | DHCP ✅ Virtualization Microsoft Hyper-V | VMware ESXi | vCenter | Proxmox VE ✅ File Servers IIS FTP | proftpd | FileZilla | FTP Server | Samba ✅ Web Servers Apache | NGINX | Microsoft IIS ✅ Scripting and Automation PowerShell scripting | Bash scripting ✅ Containers Docker | Windows Subsystem for Linux (WSL) ✅ Backup Systems Veeam Backup | Iperius Backup | UrBackup ✅ Mail Servers Mailcow | Microsoft Exchange (2000–2019) | MailWizz | Postfix | EXIM ✅ Database Servers MySQL | PostgreSQL | MariaDB ✅ Firewalls and Security MikroTik | PFSense | Cisco Firewalls ✅ Networking Skills Cisco Routing and Switching | VLANS | OSPF | VoIP and IP Telephony | Network Penetration Testing Access Control Lists (ACLs) Security (MITM Attack Mitigation) ✅ Recovery Services Password recovery for accounts and routers | Disaster recovery planning ✅ VOIP Service Freepbx | freeswitch | CME | IP TELEPHONY | 3CX SYSTEMS ✅ Cloud Service AWS, DigitalOcean, Hetzner, Azure, Google Cloud Platform, IBM Cloud, Oracle Cloud, Alibaba Cloud, Contabo, Seva menos -
Contratar iosifpeterfi
iosifpeterfi iosifpeterfi
$64 Dólares / hora
Systems Architect, Software Engineer, DeveloperGermanySenior Systems & Security Engineer with 15+ years in enterprise-grade IT. I design, harden, and operate high-availability infrastructure, and I streamline delivery with automation and clean processes. My focus: reliability, security, and clear documentation—so changes are low-risk and handovers are...Senior Systems & Security Engineer with 15+ years in enterprise-grade IT. I design, harden, and operate high-availability infrastructure, and I streamline delivery with automation and clean processes. My focus: reliability, security, and clear documentation—so changes are low-risk and handovers are effortless. Strengths: Infrastructure architecture & operations (Linux/Windows, virtualization, networking) Security hardening, identity & access, monitoring/observability Automation & DevOps practices (CI/CD, config management, IaC) Migrations and upgrades with minimal downtime Concise runbooks, risk-aware planning, and stakeholder-friendly communication Certifications: CompTIA Security+, Microsoft MCSE/MCSA/MCITP Languages: English (C2), German (C1), native Romanian Location: Germany • NDA-friendly • Reliable and responsive menos -
Contratar divyam12345
***Talk with me directly, before AWARD*** New Journey in Freelancer✨ I am an academician and researcher with over 10 years of experience in teaching Electrical and Electronics Engineering at the undergraduate and postgraduate levels. ✅ 1000+ Clients Served ✅ Quality work within your budget. ✅ Plagiarism-Free |...***Talk with me directly, before AWARD*** New Journey in Freelancer✨ I am an academician and researcher with over 10 years of experience in teaching Electrical and Electronics Engineering at the undergraduate and postgraduate levels. ✅ 1000+ Clients Served ✅ Quality work within your budget. ✅ Plagiarism-Free | Well-Structured | Meticulously Researched. ✨Services Cover: 🎓 My expertise covers PhD guidance, thesis and dissertation writing, and all forms of academic and research paper preparation. 🧠 I specialized in MATLAB simulations, Python programming, and algorithm development across multiple engineering and scientific domains. 📊 From concept to completion, I ensure accurate, original, and well-documented work tailored to each client’s specific goals. ✨ Every project is handled with a focus on quality, clarity, and on-time delivery. 🤝 I take pride in offering end-to-end research support from idea formulation to final submission. 📞 Always available for discussions, revisions, and clarifications to ensure complete client satisfaction. ✅ Delivering excellence, reliability, and results that truly make a difference. Programming skills: ✨ Python – IoT, automation, AI, and Raspberry Pi development. ✨ Java -- Full Stack Developer. ✨ All CSS and HTML works. Engineering: ✨Electrical Engineering: Circuit Design, Renewable Energy ✨Control Systems: PID, Adaptive Control, Predictive Control ✨Matlab & Simulink – Control systems, simulations, and algorithm design. Software & Tools: ✔️ MATLAB/Simulink ✔️ LaTeX, SPSS Statistics menos -
Contratar ServerOK
I have 20 years of experience in web hosting, managing RHEL, CentOS, CloudLinux, Ubuntu, Debian, FreeBSD, and Windows Servers. I am online from UTC/GMT 03:00 to 07:00 and 16:00 to 20:30. * Linux - Ubuntu/Debian/CentOS/RHEL/Fedora/FreeBSD * Azure/Amazon AWS/Google Cloud * Nginx/Apache/Lighttpd/LiteSpeed * VPS -...I have 20 years of experience in web hosting, managing RHEL, CentOS, CloudLinux, Ubuntu, Debian, FreeBSD, and Windows Servers. I am online from UTC/GMT 03:00 to 07:00 and 16:00 to 20:30. * Linux - Ubuntu/Debian/CentOS/RHEL/Fedora/FreeBSD * Azure/Amazon AWS/Google Cloud * Nginx/Apache/Lighttpd/LiteSpeed * VPS - OpenVZ/KVM/Xen/Hyper-V/SolusVM/ProxMox * Docker/RancherOS * Linux/Cpanel Server Setup * Server Security - csf/maldet * PHP - Script Installation/Custom coding/Laravel * Ffmpeg/Youtube Clone installation * WHMCS Installation * OpenAI, Gemini, Claude, Deepseek, Ollama, Local LLM, OpenClaw Listed on FreeLancer Security Hall Of Fame - Yujin Boby (@serverokin) https://www.freelancer.com/about/security/hall-of-fame menos -
Contratar kashifnadeem86
kashifnadeem86 kashifnadeem86
$60 Dólares / hora
Azure Solutions Architect Expert & DevOps EngineerPakistanAzure Solutions Architect Expert & DevOps Engineer I’m a certified Azure Solutions Architect and DevOps Engineer with over 10 years of experience in designing, deploying, and automating secure, scalable, and high-performance infrastructures across Azure, AWS, and other platforms. ✅ Certifications: ✅ AZ-400:...Azure Solutions Architect Expert & DevOps Engineer I’m a certified Azure Solutions Architect and DevOps Engineer with over 10 years of experience in designing, deploying, and automating secure, scalable, and high-performance infrastructures across Azure, AWS, and other platforms. ✅ Certifications: ✅ AZ-400: Designing and Implementing Microsoft DevOps Solutions ✅ AZ-305: Azure Solutions Architect Expert ✅ AZ-104: Azure Administrator Associate ✅ Azure DevOps Assessment (Score: 18473) ☁️ Cloud Expertise ✅ Microsoft Azure Networking & Security: Azure Front Door, Application Gateway, Load Balancer, VNet, NSG, VPN Gateway, Private Endpoints, DNS Management Compute & Containers: Azure Virtual Machines, Azure Kubernetes Service (AKS), Azure Container Instances (ACI), Azure Functions App Services & Integration: Azure Web Apps, Azure Logic Apps, Azure API Management, Azure DevOps (CI/CD Pipelines) Data & AI: Azure SQL Database, Blob Storage, Azure AI Services, Azure Batch Identity & Access: Azure Entra ID (Azure AD), B2B/B2C Identity, Hybrid AD Join, Role-Based Access Control (RBAC) Governance & Monitoring: Azure Policies, Resource Graph, Cost Management, Azure Monitor, Log Analytics ✅ AWS Cloud Compute & Containers: EC2, RDS, EKS, Lambda, Lightsail Networking & Security: VPC, IAM Policies, SES, Route 53, CloudWatch, Load Balancing, CloudFront Storage & DevOps: S3, ECR, Backup Solutions, Serverless Architectures ✅ Other Cloud Platforms Google Cloud Platform (GCP): Infrastructure setup and VM provisioning DigitalOcean, Vultr, OVH, Hetzner: DNS management, resource provisioning, LAMP/LEMP stacks, firewalls ☁️ DevOps, IaC & Automation Infrastructure as Code (IaC): Terraform, ARM Templates, Ansible, Puppet, Chef Automation & Scripting: PowerShell, Bash, Python, Chocolatey, GitHub Actions, Azure Automation CI/CD: Azure DevOps Pipelines, GitHub Actions (YAML & Classic) Containers & Orchestration: Docker, Kubernetes, LXC Patch Management & Hardening: Windows, RHEL, Ubuntu ☁️ Open Source App Hosting Matrix Synapse: Federation setup, homeserver deployment, authentication integration Keycloak: SSO and OIDC integration with Jitsi, Nextcloud, etc. Web Hosting: Apache, Nginx, Plesk, cPanel, Webmin Applications: Odoo, Nextcloud, Plainpad, FrePPLe Mail Servers: Postfix, Dovecot for secure org-wide or bulk email DNS & Domains: BIND, Cloudflare, Namecheap DNS APIs ✅ If you’re looking for a reliable engineer who can build, secure, and automate cloud-native and hybrid infrastructures — let’s connect and make your systems future-ready. menos -
Contratar AZTURK1
I have 7 years of experience deploying and maintaining a wide range of systems and services. My expertise includes: ✅ Server Operating Systems: Windows Server 2003 to 2024, Ubuntu, Debian, RHEL, CentOS. ✅ Directory service: Active Directory, OpenLDAP. ✅DNS, DHCP: Windows Server DNS, DHCP and Linux DNS, DHCP...I have 7 years of experience deploying and maintaining a wide range of systems and services. My expertise includes: ✅ Server Operating Systems: Windows Server 2003 to 2024, Ubuntu, Debian, RHEL, CentOS. ✅ Directory service: Active Directory, OpenLDAP. ✅DNS, DHCP: Windows Server DNS, DHCP and Linux DNS, DHCP services. ✅ Virtualization: Microsoft® Hyper-V, VMware Hypervisors (ESXI, vCenter), Proxmox, VirtualBox. ✅ Cloud Computing Platforms: AWS Amazon Web Services, Microsoft®, Google Cloud Platform(GCP). ✅ Self-Hosted Clouds: NextCloud, OwnCloud, Seafile. ✅ File servers: IIS FTP, proftpd, FileZilla FTP Server, SAMBA. ✅ Web servers: IIS, APACHE, NGINX ✅Scripting: PowerShell scripting, Bash Scripting ✅Containers: DOCKER, Windows Subsystem for Linux (WSL). ✅Backup Systems Veaam Backup, Iperius Backup, UrBackup. ✅ Mail servers: POSTFIX, EXIM, Microsoft Exchange 2000 to 2019, QMAIL ,Zimbra ,Mail Enable , SmarterMail, hMail. ✅ Database servers: MySQL, PostgreSQL ✅ Firewalls: Windows firewall,ISA/Forefront TMG, MikroTik, PFSense, Zywall and other Routers; ✅ Data Storage Systems: Netapp, FAS, EMC, VNX; ✅NAS: FreeNAS, TrueNAS ,Synology, QNAP, Buffalo ✅ Monitoring ZABBIX, CACTI, NAGIOS ✅ Hosting Panels: WHM-cPanel, PLESK, CyberPanel, aaPanel Why Choose Me? ✅24 hours availability ✅Unlimited revisions ✅Fast response Microsoft® Certified ** MCSA | MCSE | MCT ** menos -
Contratar krishmaqvan
Administrador do Sistema, Rede de Administração, Servidor Windows, Linux, Área de trabalho do WindowsHello My name is Kishor. I am top rated freelancer by preferred freelancer team. I am providing technical support for desktop, server, switches, routers and all IT elated devices List of services: Server configuration,magement,migration and troubleshooting. Microsoft windows all versions troubleshooting. Linux...Hello My name is Kishor. I am top rated freelancer by preferred freelancer team. I am providing technical support for desktop, server, switches, routers and all IT elated devices List of services: Server configuration,magement,migration and troubleshooting. Microsoft windows all versions troubleshooting. Linux configuration,management and troubleshooting. Network switches ,router and other devices configuration for lan and wan. I am Cisco and RedHat certified engineer. Microsoft: Active directory , file server ,ssh ,remote desktop server, windows update server,dns server,dhcp server, terminal server. Linux: Centos ,RedHat,Fedora, Debian ,Ubuntu ,Suse Servers (HP Proliant Servers) & (Dell power edge server) I am available for solve your any Information technology related projects I have licensed version of Anydesk so I can fix and complete project wit remote session with Anydesk. menos -
Contratar rupa37
I bring over 15 years of extensive experience in the fields of system administration and DevOps, making me a seasoned professional in managing and optimizing IT infrastructures. With a strong foundation in virtualization technologies, I excel in creating efficient and scalable virtualized environments. My expertise...I bring over 15 years of extensive experience in the fields of system administration and DevOps, making me a seasoned professional in managing and optimizing IT infrastructures. With a strong foundation in virtualization technologies, I excel in creating efficient and scalable virtualized environments. My expertise extends to a wide range of Linux systems, and I am well-versed in handling various distributions, ensuring their stability, security, and performance. I have a proven track record of successfully deploying web applications, guaranteeing smooth and reliable online experiences for users. One of my core strengths lies in managing system updates and applying security patches promptly, reducing vulnerabilities and minimizing downtime. My commitment to network security is unwavering, and I implement robust measures to protect data and maintain the integrity of systems. Furthermore, my proficiency in Cisco networking solutions allows me to design, configure, and troubleshoot complex network infrastructures, ensuring seamless connectivity and optimal performance. Additionally, I have a solid understanding of <b> HPE (Hewlett Packard Enterprise) </b>equipment, enabling me to efficiently manage and maintain these devices to meet organizational needs. With my extensive knowledge, practical experience, and dedication to staying updated with the latest industry trends, I am well-equipped to contribute significantly to any organization's IT operations, ensuring they run smoothly, securely, and efficiently. menos -
Contratar SEOGlobalLLC
You don’t just need code. You need a team that understands the business outcome behind it. SEO Global is a full-stack development group working with founders, agencies, and growing companies that want senior-level execution without the overhead of hiring or micromanaging freelancers. We design, build, and maintain...You don’t just need code. You need a team that understands the business outcome behind it. SEO Global is a full-stack development group working with founders, agencies, and growing companies that want senior-level execution without the overhead of hiring or micromanaging freelancers. We design, build, and maintain scalable digital products—from polished frontend experiences to robust backend systems. What sets us apart isn’t just technical ability. It’s product thinking. We don’t blindly build feature lists. We help you focus on what actually drives results, then design and develop solutions that are clean, fast, and built to scale. Our Expertise * Custom web applications and platforms * Android & iOS mobile app development * E-commerce systems and payment flows * Trading systems, automation, and market data tools * AI-powered features and workflow automation * Web scraping, data extraction, and crawling systems * Bot development (Telegram, Discord, automation bots) * API development and third-party integrations * Performance optimization and technical SEO * Ongoing product iteration, maintenance, and support If you’re looking for a reliable development team that thinks in terms of outcomes—not just tasks—let’s talk. menos -
Contratar mrkimoz
I design and build high-availability, production-grade infrastructure for SaaS platforms, hosting providers, and enterprise systems. With 20+ years of hands-on experience, I help businesses deploy scalable, secure, and cost-efficient systems using Proxmox, Kubernetes, and cloud platforms like AWS & Azure. In addition...I design and build high-availability, production-grade infrastructure for SaaS platforms, hosting providers, and enterprise systems. With 20+ years of hands-on experience, I help businesses deploy scalable, secure, and cost-efficient systems using Proxmox, Kubernetes, and cloud platforms like AWS & Azure. In addition to infrastructure, I work as a Full-Stack Engineer, building and scaling SaaS applications end-to-end — from frontend dashboards (React / Next.js) to backend APIs (Node.js / Python), and data architectures using PostgreSQL, Redis, and analytics engines. I specialize in solving complex system challenges across both application and infrastructure layers — from designing complete cloud-native platforms to optimizing performance, data pipelines, and fixing critical production issues under pressure. menos