System Administrators para contratar
Mostrando 238 resultados
Freelancers patrocinados
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Contratar servermaster
About me I have worked over 20 years at IT and telecom companies in the following positions: IT support, System Administrator, Applications Administrator and Monitoring Administrator-Expert. I am "System Administration and IT Infrastructure Services" certified I follow KISS methods. I understand the OSI layer. With...About me I have worked over 20 years at IT and telecom companies in the following positions: IT support, System Administrator, Applications Administrator and Monitoring Administrator-Expert. I am "System Administration and IT Infrastructure Services" certified I follow KISS methods. I understand the OSI layer. With me, it is easy to set up systems. I am not picky about what systems to use, but I do have experience with what to use. I know the following operating systems + distros: Debian, Ubuntu, Gentoo, SUSE, Red Hat, CentOS, Rocky Linux, AlmaLinux, Arch Linux, FreeBSD, NetBSD, OpenBSD, Sun Solaris, plus MS Windows servers I also know the following systems: * Web servers: Apache, Nginx, Lighttpd, Litespeed, Hiawatha. * Java web servers: Tomcat, Jrun, JBoss * Javascript: Node.js, Npm * Proxy systems: Haproxy, Varnish, Squid. DB servers: MySQL (and forks, including MariaDB), PostgreSQL * Mail systems: Postfix, Exim, Dovecot, and implementing DKIM, SPF, MX, and DMARC * Monitoring systems: Nagios, Zabbix, Cacti, Grafana * SMS: SMSC, Kannel * DNS: Bind, Djbdns, Dnsmasq. * VPS: VMware, Hyper-V, Proxmox, bhyve, KVM, Xen, OpenStack... * Containers: Docker, Podman, LXC, Jail, Kubernetes * High Computing: OpenHPC, SLURM, MPI, and related * Cloud providers: AWS, DigitalOcean, Azure… I troubleshoot easily My knowledge does not stop here. Let's chat Please see my reviews of my previous works PS! As bonus, with my bid, you will get one week of free support for work done menos -
Contratar MaTGaPa
I started with BeOS in 2002, because of a friend, who showed me something other than Windows, Always I worked repair PC & Laptops. Now I have more 10 years of experience in Server Linux. I can manager servers dedicated, servesr VPS, servers shared, etc. Setup and management you server; Apache/Nginx/Tomcat. SMTP...I started with BeOS in 2002, because of a friend, who showed me something other than Windows, Always I worked repair PC & Laptops. Now I have more 10 years of experience in Server Linux. I can manager servers dedicated, servesr VPS, servers shared, etc. Setup and management you server; Apache/Nginx/Tomcat. SMTP Postfix, POP/IMAP Dovecot. FTP Vsftpd, Proftpd, Pure-ftpd-mysql. Dns Bind9, dnsmasq. File Server & printer Samba (dc-ac). Network administrator: isc-server-dhcp, openvpn, etc. Install and renew SSL certicate. All services on cloud; AWS, Azure, etc. Also website and E-mail migrations. ALL panels and web managers. Management all Linux distributions. Setup, security and optimization your server. __________________________ VERY IMPORTANT!!! “Hi I'm Matias, someone is trying to impersonate me, this account is the only one active and verified by freelancer! I DON'T USE ANY OTHER MEANS OF CONTACT, ONLY FREELANCER CHAT!” ----------------------------------------- menos -
Contratar dstoych96
Daniel Stoychev – Web Developer & IT Specialist I’m a full-stack web developer, Linux specialist and freelancer with extensive experience across multiple platforms. BSc (Hons) Computer Science at Wrexham University, United Kingdom, (Level 6). I bring both academic expertise and a professional edge to every project I...Daniel Stoychev – Web Developer & IT Specialist I’m a full-stack web developer, Linux specialist and freelancer with extensive experience across multiple platforms. BSc (Hons) Computer Science at Wrexham University, United Kingdom, (Level 6). I bring both academic expertise and a professional edge to every project I undertake. With a proven track record of completing 300+ websites and projects, I possess a deep understanding of IT and programming. My skill set includes: Web Development & Programming: Next.js (main), React, HTML, CSS, Node.js, JavaScript, PHP, Python, Java DevOps & System Administration: Linux (Ubuntu, Debian), Shell Scripting, Plesk, VPS & Web Hosting, Nginx, SSL/TLS, DNS configuration Databases & CMS: MySQL, PostgreSQL Building scalable and efficient systems Delivering innovative digital solutions tailored to client needs Whether you're looking for a reliable developer for your next project or need expert advice on web technologies, I am here to help. Let's bring your vision to life! menos -
Contratar iosifpeterfi
Senior Full-Stack Engineer & Systems Architect with 15+ years in enterprise-grade IT and web development. I design, build, and operate high-availability infrastructure and modern web applications—from frontend to backend to cloud. My focus: reliability, security, clean code, and clear documentation. Strengths: •...Senior Full-Stack Engineer & Systems Architect with 15+ years in enterprise-grade IT and web development. I design, build, and operate high-availability infrastructure and modern web applications—from frontend to backend to cloud. My focus: reliability, security, clean code, and clear documentation. Strengths: • Full-stack web development (HTML, CSS, JavaScript, React, Angular, Vue.js, Next.js, Node.js, PHP, Python) • E-commerce & CMS platforms (Shopify, WooCommerce, WordPress, Magento) • Cloud architecture & serverless (AWS, AWS Lambda, Docker, Kubernetes) • Infrastructure & operations (Linux/Windows, virtualization, networking) • Database design & administration (PostgreSQL, MySQL, MongoDB, MariaDB) • Security hardening, identity & access, monitoring/observability • Automation & DevOps (CI/CD, Ansible, IaC, config management) • API design & integration (REST, Web Services, third-party APIs) • Data pipelines, Zoho/ERP integrations, BI dashboards • Responsive design, website optimization, and SEO best practices • 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 raminde
Web ERPs: We create customized Web Erps for all kinds of business. Logistic ERPs. Financial ERPs. Sales ERPs, Marketing ERPs etc. API Integrations. We do all kinds of api Integrations, Payment gateways, Couriers, Stocks etc., Experts in JSON, XML, APIs, Code Hackers/ Ethical Hacker / Reverse Engineering Expert/...Web ERPs: We create customized Web Erps for all kinds of business. Logistic ERPs. Financial ERPs. Sales ERPs, Marketing ERPs etc. API Integrations. We do all kinds of api Integrations, Payment gateways, Couriers, Stocks etc., Experts in JSON, XML, APIs, Code Hackers/ Ethical Hacker / Reverse Engineering Expert/ Vulnerability tester. Experts in Data Mining/Web Scraping Have over 10 years of experience in data mining/ Web scrapping. Tell us your source and we will we can do it for you, Expertise in data analytics of large sized data..99% Data Accuracy. Duplicate finder. etc., You can also ask output data into a particular format or into database Web Development We are professional web developers having expertise in all kinds of eCommerce developments/ website developments / php mysql customize projects Ecommerce Website Development 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 itazedo
I am a network administrator with a degree in Information Security, bringing nearly 20 years of experience in computer networks, virtualized environments, and Linux systems. My expertise spans a wide range of technologies, from VPN and security configurations to network virtualization, cloud infrastructure, and IT...I am a network administrator with a degree in Information Security, bringing nearly 20 years of experience in computer networks, virtualized environments, and Linux systems. My expertise spans a wide range of technologies, from VPN and security configurations to network virtualization, cloud infrastructure, and IT service operations. My Specialties: Designing and implementing medium and large-scale enterprise networks to ensure scalability, security, and optimal performance. Expertise in pfSense and OPNsense for firewall, VPN, L2TP, IPSec, DHCP, DNS, NAT, and other network services. Proficient in WireGuard VPN for secure, high-performance connections in diverse environments. In-depth knowledge of XCP-NG and Proxmox VE for virtualization, container management, and cloud infrastructure. Extensive experience with Oracle Linux, ensuring stable and secure enterprise Linux environments. Skilled in FreePBX (VOIP) and IVR (Interactive Voice Response) solutions for scalable voice services. Advanced understanding of switching technologies, including VLANs, TRUNK, LACP, and other essential network protocols. Integration and management of Kimai time tracking system for accurate activity billing and productivity monitoring. Implementation and customization of Zammad helpdesk system for streamlined support and ticketing workflows. Configuration and deployment of Ubiquiti equipment (UniFi, EdgeRouter, airMAX, UISP) for reliable wireless backhauls, point-to-point links, and enterprise-grade Wi-Fi solutions. Skills and Hands-on Experience: Proficient in working with Cisco routers and switches, ensuring high availability and network optimization. Experience with Synology NAS for network storage solutions. Expertise in AWS Lightsail, including cost optimization for EC2, Route53, RDS, VPC, Gateway, Load Balancer, and VPN setup. Oracle Cloud Infrastructure (OCI): Deployment and management of compute instances, VCNs, subnets, Internet Gateways, routing, security lists, and firewall policies, enabling secure, high-performance cloud-based infrastructures. Strong capabilities in network documentation to provide detailed, accurate infrastructure layouts for management and troubleshooting. 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
SEO Global helps founders, startups, agencies, and businesses build, rescue, and scale modern software products. Many projects today begin with AI tools, vibe coding, prototypes, freelancers, or internal teams, but eventually run into issues: • unstable code • unfinished features • scaling problems • poor...SEO Global helps founders, startups, agencies, and businesses build, rescue, and scale modern software products. Many projects today begin with AI tools, vibe coding, prototypes, freelancers, or internal teams, but eventually run into issues: • unstable code • unfinished features • scaling problems • poor architecture • broken integrations • performance bottlenecks We specialize in stepping into existing projects, organizing complexity, and helping bring products across the finish line. Whether you need to: • continue an unfinished project • clean up AI-generated code • stabilize a React or Next.js app • improve backend scalability • repair API integrations • optimize performance • or turn an MVP into a production-ready product we can help. Our work includes: • Full-stack web applications • SaaS MVP development • AI-assisted project rescue • Mobile app development • APIs & integrations • Automation & AI workflows • E-commerce systems • Trading & data platforms • Performance optimization & technical SEO • Ongoing scaling and maintenance We combine strong engineering with practical product thinking and clear communication. If you need an experienced team that can step into complexity and move a project forward realistically, let’s talk. menos -
Contratar usmanbashir12100
I help startups, enterprises, and growing businesses build secure, scalable, AI-powered software solutions—from modern web and mobile applications to cloud infrastructure, DevOps automation, and enterprise integrations. With 7+ years of experience and hundreds of successful projects delivered worldwide, I specialize...I help startups, enterprises, and growing businesses build secure, scalable, AI-powered software solutions—from modern web and mobile applications to cloud infrastructure, DevOps automation, and enterprise integrations. With 7+ years of experience and hundreds of successful projects delivered worldwide, I specialize in designing production-ready applications, cloud-native architectures, AI automation, and business systems that improve performance, security, and operational efficiency. Core Expertise • AI-Powered Applications & Automation (OpenAI, Claude, LangChain) • Full-Stack Development (Laravel, PHP, .NET, Node.js, React, Next.js, Vue) • Mobile App Development (Flutter, React Native, Android & iOS) • Cloud Infrastructure (AWS, Azure, Google Cloud Platform) • DevOps & CI/CD (Docker, Kubernetes, GitHub Actions, GitLab CI/CD) • REST APIs, GraphQL & Third-Party Integrations • Shopify, WordPress & Custom SaaS Development • Microservices & Enterprise Software Architecture • Database Design (MySQL, PostgreSQL, MongoDB, Redis) • Google Workspace, Microsoft 365 & Zoho Email Migrations • Email Deliverability & DNS (SPF, DKIM, DMARC, BIMI, Cloudflare) • Server Administration (Linux, Windows, Apache, Nginx) Why Clients Hire Me ✔ End-to-end software development—from idea to deployment ✔ AI integration for modern business applications ✔ Production-ready cloud infrastructure & DevOps automation ✔ Secure, scalable, and maintainable code ✔ Expert in complex email migrations and deliverability optimization ✔ Strong communication, fast turnaround, and long-term support Whether you need an AI-powered SaaS platform, enterprise web application, mobile app, cloud migration, DevOps automation, API integration, or secure email infrastructure, I deliver solutions built for reliability, scalability, and business growth. Let's build innovative software that scales with your business. menos
