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Freelance Linux System Administrators
Check out freelance Linux System Administrators on Upwork, with the skills you need for your next job.
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- $150 hourly
- 5.0/5
- (252 jobs)
A Top-Rated, Expert-Vetted VoIP/Software engineer with over 20 years of experience. My experience ranges from Asterisk/FreePBX phone systems, SMS messaging, Linux operating systems, to network administration. I believe you deserve a more professional, reliable, and personalized business experience, and I bring that mindset to every project. Whether I’m developing top-secret code for Lockheed Martin, or AI telephone agents for Nomo, or creating privacy-first communications for Mecca Hosting, Inc, or designing secure, high availability Asterisk systems for TeleConnx Inc., or handling difficult troubleshooting tasks, I always commit myself to the same standard: creative, client-first solutions and efficient, high-quality work, completed in a fraction of the time. I have a passion for transforming mundane phone interactions into exciting customer experiences, and I lean on decades of experience to create solutions that others would find impossible. In short, I can make your telephone system do pretty much anything, including turning on your coffee maker in the morning. I look forward to working with you!
Linux System Administration
FreePBXMySQLKamailioAmazon Web ServicesVoIP AdministrationAsteriskAPI DevelopmentCVoIP SoftwareLAMP AdministrationSession Initiation ProtocolLinuxVoIPBusiness with 10-99 Employees - $45 hourly
- 5.0/5
- (8 jobs)
Are you looking for a seasoned DevOps consultant who can Revolutionize IT Operations with Scalable, Secure, and Cost-Effective DevOps Solutions? With over 15 years of experience in IT and a specialization in DevOps and cloud-based solutions, I deliver high-quality, scalable, and secure infrastructures tailored to meet your business goals. 𝗪𝗵𝗮𝘁 𝗜 𝗕𝗿𝗶𝗻𝗴 𝘁𝗼 𝘁𝗵𝗲 𝗧𝗮𝗯𝗹𝗲: 𝗖𝗹𝗼𝘂𝗱 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲: Proficient in AWS Cloud and adept at leveraging the cloud for high-availability, cost-effective solutions. 𝗖𝗼𝗻𝘁𝗮𝗶𝗻𝗲𝗿𝗶𝘇𝗮𝘁𝗶𝗼𝗻 & 𝗢𝗿𝗰𝗵𝗲𝘀𝘁𝗿𝗮𝘁𝗶𝗼𝗻: Hands-on experience with Kubernetes (on-prem and Cloud) to build resilient, containerized systems. 𝗖𝗜/𝗖𝗗 𝗠𝗮𝘀𝘁𝗲𝗿𝘆: Proven track record designing and optimizing CI/CD pipelines using Jenkins and AWS Pipeline, reducing deployment time while boosting system reliability. Reduced deployment time by 50% using optimized CI/CD pipelines. 𝗜𝗻𝗳𝗿𝗮𝘀𝘁𝗿𝘂𝗰𝘁𝘂𝗿𝗲 𝗮𝘀 𝗖𝗼𝗱𝗲 (𝗜𝗮𝗖): Expertise in Terraform and other IaC tools to provision and manage infrastructure efficiently and securely. 𝗦𝗲𝗰𝘂𝗿𝗶𝘁𝘆 & 𝗖𝗼𝗺𝗽𝗹𝗶𝗮𝗻𝗰𝗲: Robust solutions to ensure adherence to best practices and regulatory compliance, safeguarding your business-critical data. 𝗣𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 𝗢𝗽𝘁𝗶𝗺𝗶𝘇𝗮𝘁𝗶𝗼𝗻: Strategies to maximize resource utilization, reduce costs, and enhance overall application performance. 𝗪𝗵𝘆 𝗖𝗵𝗼𝗼𝘀𝗲 𝗠𝗲? End-to-End Solutions: From initial design to deployment and scaling. Tailored Strategies: Aligned with your business goals and challenges. Seamless Integration: Collaborating with your existing teams for smooth transitions and implementations. Ready to transform your IT operations? Let's connect to discuss how we can achieve your goals together.
Linux System Administration
HashiCorp VaultKubernetesWindows ServerWSO2ScriptingDevOpsTerraformAmazon Web ServicesJenkinsDeployment AutomationInfrastructure ManagementDockerCI/CD - $70 hourly
- 5.0/5
- (41 jobs)
I help businesses scale and optimize their operations through advanced software engineering and cloud architecture. With over 15 years of experience delivering full-stack solutions, I have collaborated with clients across the US and Europe, consistently delivering high-quality, robust applications that meet business goals and exceed expectations. Core Services: • Full Stack Web Development: Building scalable web applications using modern frameworks. • API Development & Integration: Creating and integrating RESTful and GraphQL APIs for seamless service communication. • Cloud Architecture & DevOps: Designing scalable infrastructure, automated CI/CD, and serverless solutions. • Database Design & Tuning: Optimizing relational and NoSQL databases for peak performance and scalability. Technology Stack: • Languages & Frameworks: Go, TypeScript/JavaScript (Node.js, Vue.js, React.js), Python, PHP (Laravel) • Cloud Platforms: AWS, Google Cloud Platform, Firebase, Kubernetes, CloudRun • Databases & Caching: MySQL, MongoDB, CliudSQL, RDS, Redis, Memcached • Search & Indexing: Elasticsearch, Lucene, Sphinx Search Key Achievements: • Architected High-Traffic Platforms: Led a global team to scale a platform supporting 5M+ users, ensuring optimal performance. • Cloud & DevOps Expertise: Implemented AWS and Google Cloud solutions with serverless architectures and Kubernetes for seamless scalability. • Database Optimization: Enhanced database performance by through advanced data modeling and query optimization. Certifications: 📜 MIT Certification in Backend Development & Machine Learning 💡 Upwork Skill Certification in PHP Development Why Choose Me? I combine technical expertise with a strategic, business-oriented mindset, ensuring that every solution I deliver not only meets technical requirements but also aligns with business objectives. Whether you're looking to build a new product, optimize an existing system, or streamline your cloud infrastructure, I offer a unique blend of deep technical knowledge and proven leadership capabilities. Let’s connect and explore how I can help you transform your ideas into scalable, efficient, and high-performing solutions.
Linux System Administration
Google Cloud PlatformAPI DevelopmentRESTful APILaravelMongoDBAmazon Web ServicesMySQLRedisHTMLVue.jsJavaScriptPHPNode.jsReactPython - $55 hourly
- 5.0/5
- (197 jobs)
Servers administration, security hardening, malware cleanup, prevention of hackers intrusion, DevOps, DNS, email, web hosting setup, migration, troubleshooting, recovering, monitoring, automation, scripting, supporting, writing documentation. 5+ years on Upwork, individual freelancer. I offer reasonable services in areas: Security: • malware cleanup, websites recovery; • penetration testing; • security hardening for servers and websites; Web hosting: • websites migration and web hosting setup; • hosting optimizing for speed and security, troubleshooting; • DNS configuration and troubleshooting, Cloudflare automation; • setup and support hosting panels (Plesk, cPanel/WHM, HestiaCP, DirectAdmin etc); • deploy and support various CMS (WordPress, Drupal, Typo3 etc); • cloud hosing (VPS) setup and automation (DigitalOcean, Linode, Hetzner, Vultr etc); DevOps and Clouds: • automation scripting with Bash, PowerShell; • clouds service and infrastructure setup (GCP, AWS, Azure); • virtualization (Proxmox VE, Hyper-V, XEN); • Docker, Podman; • Kubernetes; • CI/CD pipelines. IT infrastructure administration tasks: • monitoring and maintain of servers and infrastructures; • DNS configuration, mail servers; • mesh networks (Netmaker, Zerotier etc), Wireguard, VPN (IPSec); • servers and workstations administration (Windows, macOS, Linux); Systems and services troubleshooting, data recovery: • OS restoring and boot recovery; • recovering of data, file systems and RAID; • software and systems troubleshooting.
Linux System Administration
DebianDisaster RecoveryData RecoveryWeb ServerScriptingWebsite SecurityWeb HostingCloudflareProxmox VEVirtual Private ServerDNSUbuntu - $120 hourly
- 5.0/5
- (31 jobs)
I am a technology expert with over 25 years of experience in providing secure, stable, and reliable computing infrastructure. My core passion is building from a blank canvas, to turn your project or product into a reality, whether it's a piece of automation or building a complete application infrastructure. I am also a "jack of all trades" administrator/engineer with experience in & exposure to a variety of industries and environments. This gives me a level of expertise that will provide you with a positive and thorough outcome to any project. My expertise includes many aspects of development, systems administration, and operations: - Infrastructure design & implementation, physical and cloud-based - Gitlab self-hosted administration & migration - CI/CD pipelines with Jenkins, Gitlab, and GitHub - Microservice and container implementation with Docker & Kubernetes - Automated Linux installation & configuration - Configuration management, automation, and orchestration using Ansible and Puppet - Scripting in bash shell, Python, and Perl - Web server administration with Apache and Nginx - Secure & scalable deployment of Node-based applications - Java application server deployment & administration with Tomcat & JBoss - Linux server hardening & security - Virtualization using KVM and VMWare - AWS administration including EC2, VPC, S3, RDS, Kinesis, Glacier, ElastiCache, CloudWatch, and CloudFormation - Azure administration - Architect & build multi-site enterprise data centers and colocation sites - Centralized authentication using LDAP, FreeIPA, and Active Directory - Systems monitoring & alerting using Nagios and Zabbix - DNS and DHCP configuration and management - Trending analysis using Prometheus, Grafana, Graphite, Elasticsearch, and InfluxDB - High availability operations I am also familiar with Windows server & Active Directory administration, including DNS, DHCP, domain management, group policies, and user management. Client satisfaction is my top priority. I would be happy to work with you on any project, big or small, and help you accomplish your goals. I'm flexible with my working hours to meet your needs.
Linux System Administration
GitLabAnsibleCI/CDGitDevOpsJenkinsDeployment AutomationAutomationDockerUbuntuMicrosoft AzurePythonLinuxAmazon Web Services - $60 hourly
- 4.9/5
- (287 jobs)
⭐️ Top Rated Plus - Top 3% Expert on Upwork 🕒 9000+ Working Hours ✅ 20+ Years of Expertise ✅ 100% Job Success ✅ 280+ Successful Projects Finished ✅ 5 Star Rating Hello, I'm Oleksandr. As a seasoned Linux System Administrator and DevOps Engineer with over 20 years of experience I specialize in delivering robust IT solutions that enhance operational efficiency and security. My expertise spans across various domains, including: ▪ DevOps & Automation: Successfully implemented automated provisioning using SaltStack and Ansible, streamlining deployment processes and reducing manual intervention. ▪ Linux & FreeBSD Maintenance: Managed and optimized server environments on CentOS, Debian, Ubuntu, RHEL, and FreeBSD, ensuring high availability and performance. ▪ Cloud Hosting: Deployed and maintained scalable cloud solutions on AWS, Azure, and DigitalOcean, enhancing infrastructure reliability and scalability. ▪ Virtualization: Utilized Docker, VirtualBox, and OpenVZ to create flexible and efficient virtual environments, supporting diverse application needs. ▪ Web & Database Servers: Configured and maintained Apache, Nginx, MySQL, PostgreSQL, and MongoDB servers, ensuring secure and efficient data handling. ▪ Networking & Security: Implemented secure networking solutions, including VPNs and firewalls, to protect sensitive data and maintain network integrity. I am committed to continuous improvement and staying abreast of the latest industry trends. My approach is rooted in ITIL best practices, ensuring incident management and business continuity planning are at the forefront of my work. Let's collaborate to drive your IT projects to success with innovative solutions and expert guidance.
Linux System Administration
Network AdministrationWordPressSSLFreeBSDWeb HostingDNSUbuntuCentOS - $60 hourly
- 4.9/5
- (351 jobs)
Skilled System Administrator and Network Engineer with over 20 years of hands-on experience, adept at organizing networks for single-office environments or multiple offices connected via VPN. I am highly proficient in Unix system administration (Linux and FreeBSD), covering DNS, DHCP, LAMP/LEMP, FTP, SMTP, SNMP, ACLs, firewalls, and NAT, BGP. My expertise also extends to major cloud platforms (AWS, Vultr, DigitalOcean) and virtualization technologies (vSphere, Hyper-V, Proxmox), as well as monitoring tools (Zabbix) and VoIP/IP telephony systems (Asterisk, FreePBX). Here is what past clients have said about my work: - “Pavel was fantastic! My project hit a snag and I needed an FTP server configured quickly. He jumped in immediately, resolved the issue in no time, and answered all my questions in a friendly manner. This guy is a real problem solver!” - “Very smart when it comes to Linux systems—was able to help with our issue.” - “A very skilled and professional expert who solved all additional and unexpected problems with patience. He overdelivered, and I highly recommend working with him!” - “The problem was solved quickly and efficiently.” - “Pavel did a great job tracing the problem and solving it.” - “Pleasure to work with.” I take pride in my ability to quickly diagnose issues, implement reliable solutions, and consistently exceed client expectations.
Linux System Administration
AsteriskDNSsecWordPressFirewallApache AdministrationMySQLLAN AdministrationSession Initiation ProtocolSquidWeb HostingNetwork EngineeringVMware vSphereNGINX - $150 hourly
- 5.0/5
- (121 jobs)
Telecommunication and Systems engineer with a focus on Cloud, Networking and Linux, experience in Infrastructure management and deployment. Deployed Private Cloud infrastructure, Datacenter Network Design for Multi-tenancy, fault-tolerant design, NIC Bonding and VRRP for High Availability. Stack: *Full virtual networking with vSwitches and vRouters *VLAN, VxLAN, GRE and Overlay tunnels *IPv6 *MP-BGP, EVPN *Firewalling *VPN/OpenVPN/IPSec/WireGuard/Site to Site and Client-Server * VPP/DPDK for 100G VPN and routing *Advanced Linux management: IPTables, Kernel modules, Virtualization, Networking. *Traffic engineering *Advanced StrongSwan IPSec tunnels, XFRM *Cloudstack with Open vSwitch *OpenNebula with Open vSwitch *OpenDaylight SDN controller with OpenvSwitch *Advanced Proxy setup with Squid/Nginx *Virtuozzo and OpenVZ *KVM and Libvirtd / Proxmox *MicroVM Managment / Firecracker *RADIUS and FreeRADIUS *Pacemaker/Corosync/Keepalived HA cluster *MTLS design and implementation with NGINX *IoT gateway implementation with Raspberry Pi and 4G modems *DevOps experience with Chef and Ansible *Bash and Python scripting
Linux System Administration
Internet of ThingsApache CloudStackOpenVPNComputer NetworkPrivate CloudKernel-based Virtual MachineSystem AdministrationFirewallUbuntuNetwork SecurityLinuxInternet Protocol SecurityNetwork EngineeringVPN - $100 hourly
- 4.9/5
- (1,073 jobs)
No voice chat. AWS Expert - EC2, RDS, Load Balancing, Auto Scale, S3, Cloudfront, VPC, Route53, Workspaces, Workmail, Codedeploy, costs optimization. Microsoft Azure, Google Cloud - environment configuration, migrations, infrastructure analyzing and optimization. Cloudflare configuration. Server performance optimization - Apache, Nginx, Varnish, Mysql/MariaDB, php-fpm. Wordpress - performance optimization, security, migrations, malware clean up. Prestashop - AWS deployment, nginx configuration. Server and configuration optimization, security and speed up. Prestashop to WooCommerce migrations. Magento - security, migrations, environment configuration, performance optimization. Matomo, Sendy, Jira, OwnCloud, OpenVPN - installation, configuration, performance optimization. Dedicated Servers and VPS setup, configuration, security - both Windows and Linux. Work with CentOS, Ubuntu, Debian, Amazon Linux, FreeBSD, Windows 2003/2008/2012/2016 Servers. Server administration Panels, setup and configure - Plesk, DirectAdmin, WHM, Cpanel, Webmin, WHMCS, VestaCP, CWP. MySQL, MSSQL, Apache, IIS - setup, configuration, optimize for performance.
Linux System Administration
cPanelLinuxPrestaShopZen CartUbuntuDomain MigrationCentOSAmazon EC2WordPressAmazon Web Services - $185 hourly
- 5.0/5
- (90 jobs)
Hey, I'm James. I've been a self-employed business network and server admin for 25+ years. I've worked with all flavors of Linux and Windows for some of the best businesses in the country. My average customer that I've worked with has been with me over 15 years. I specialize in analyzing current infrastructure and determining the needs of my clients then providing a written plan to correct any issues and protect the business systems from hackers and cryptolockers. In one of my recent projects, I consulted with a six billion dollar, publicly traded company to completely redesign their infrastructure to have redundant firewalls, VMWare host servers, leased fiber lines directly to Amazon AWS with a VPN backup over a regular Internet circuit that would automatically fail over in case of any circuit issue. The vmware servers would auto migrate the guests in the case of overload or host server failure. All power systems were redundant with two powersupplies for each piece of equipment. At the end of this project, we had reduced their monthly cost of management by over 25,000 per month and reduced their server load from over 20 servers to just 8 servers. When you hire me, here's what you can expect: 1. First, click the invite button to invite me to your job. 2. Once everything is accepted, I'll jump on the phone or a zoom with you 3. We'll go over the details of the job and I'll ask questions to drill down to the specific goals you want to accomplish. 4. I'll provide you with a high level written plan to address your goals along with expected time needed to complete your project. 5. When we agree on the timeline and process, I will execute the plan. So, if this sounds good, just click the "invite" button and we can start.
Linux System Administration
DockerEmail DesignNetwork EngineeringNetwork AdministrationNetwork MonitoringNetwork DesignNetwork SecurityNetwork PlanningWeb HostingWindows AdministrationVirtualizationSystem AdministrationSystem MonitoringNGINX - $30 hourly
- 5.0/5
- (27 jobs)
With a Bachelor’s Degree and Diploma in computer science, numerous years of hands-on experience creating and implementing software applications, and the ability to troubleshoot and solve problems in a timely and accurate manner. My technical expertise includes cross-platform proficiency (Windows, Unix and Linux ); fluency in 13 scripting/programming languages (including C, C++,C#, Python, Visual Basic, Java, Perl and SQL); advanced knowledge of developer applications, tools, methodologies and best practices (including OOD, client/server architecture and self-test automation); Managing and Configuring Embedded Systems (Busybox) as well as IOT Devices such as Arduino, Raspberry PI, CubieBoard, Beaglebone, Intel Galileo and Intel Edison; Configuration management using Ansible. system virtualization using QEMU, Virtual Box, VMWare, XEN and Microsoft Hyper-V. I truly believe in continued education and research, and continue to seek new software and methods to assist with product development. I hope to bring my knowledge, and future knowledge to any organization i work in.
Linux System Administration
Deployment AutomationKubernetesLinuxMicrosoft Power BIRed Hat Enterprise LinuxPythonUbuntuJavaAnsibleAmazon Web ServicesDevOpsBash ProgrammingSplunkCentOS - $40 hourly
- 4.8/5
- (37 jobs)
Hi, My name is Valentin Kim. In my portfolio you can find a few of the technologies that I've successfully working with. I believe my strong points are my punctuality and perfectionism. My #1 goal will always be to meet your needs the best way possible. When working on a new project, I like to speak with the client, so that I can have absolutely clear understanding of her/his needs and vision of the project. Since 2007, I'm working as system administrator in companies from 50 to 600 employees and have rich experience of investigating and solving different kind of problems. Please take a note that I just started my career as freelancer on Upwork. Thank you in advance for your time and consideration. I have a Bachelors in Software Engineering from Qostanay Social Technical University, in the Kazakhstan. Listed below are my experience and skills. - OS: Linux, Windows, FreeBSD; - Networking: TCP/IP stack, MikroTik RouterOS, *nix iptables; - Virtualization: XenServer, VMWare ESXi; - Storage: Nexenta, ZFS, iSCSI SAN - Scripts: *nix bash, DOS batch files, Windows Powershell; - Programming: Python, Perl; - CMS: Puppet, Ansible; - LAMP stack administration; - Directory services: Active Directory, OpenLDAP; - Email: Microsoft Exchange 2003-2013 administration, Kerio Connect mail server, Linux postfix; - VCS: Git, Subversion; — Bug/Issue trackers: Jira, Redmine; — SQL: MySQL, PostgreSQL, MS SQL administration;
Linux System Administration
ScriptingNetwork AdministrationVirtualizationPuppet AdministrationLAMP AdministrationMikroTik RouterOSPythonWindows Server - $40 hourly
- 5.0/5
- (368 jobs)
More than 15 years of working experience in networking and server administration. Administering and scripting networking applications, database applications, web applications and internet & intranet servers In position of expert engineer for networking infrastructure, IT security expert and senior linux/windows/OSX administrator In charge of designing of LAN/MAN/WAN networking infrastructure, designing and implementation of fiberoptic backbone and copper networking installation. Administration of linux servers and networking devices (switches, routers, firewalls, NAS) am in charge of more than 150 linux servers, both physical and virtual Working with L2/L3 switches, routers, firewalls, NAS devices, switching&routing protocols (RIP, OSPF, SNMP, IGRP/EIGRP, VTP, BGP). Certified Cisco and Mikrotik networking engineer. OS platforms - Red Hat/Centos, Debian/Ubuntu, Gentoo, OpenSolaris, BSD flavors, Windows, OSX Server. Networking equipment - Cisco, HP, Mikrotik, ZTE, Huawei Some of the open-source technologies and daemons I have experience with: - bash, perl and python scripting - apache/nginx web servers (standalone, or in backend mode for tomcat, with one or many virtual hosts) - mysql/postgresql database installation and administration - squid (with or without dansguardian+clamav as content filter/realtime AV) - cloud (openstack, AWS, Azure, gcloud, OVH, rackspace, digital ocean....) - snort (with BASE and Snorby as web GUI) and suricata IDS - iptables (with or without web GUI) - BIND (standalone or master/slave) - postfix (as MTA, combined with alot of different tools such as spamassassin, amavis, clamav, roundcube, postfixadmin, dovecot, cluebringer, mailgraph) - zenoss, zabbix and cacti (with plugins and OUIs) - dovecot (as pop3/imap server of choice, combined with postfix and amavis, clamav, roundcube, postfixadmin, spamassassin) - amavis (with alot of customized settings for things such as double AV scanning, DKIM support, catching of spam headers...) - spamassassin (standard and heuristic bayesian analysis, fine tuning of scoring, OCR integration, SPF integration....) - ClamAV (using both standard and unofficial virus definitions, making of 0-day virus signatures caught in the wild...) - freeradius (with MySQL backend for AAA) - samba (in all possible variatons - standalone simple CIFS sharing, member of windows AD, standalone AD controller, one of the controllers in windows AD) - pureftpd, vsftpd and proftpd (as standalone servers or with virtual users) - xen, vmware, hyperv and kvm virtualization (stock or Xenserver/Proxmox distributions) - asterisk (via Elastix linux distribution) - roundcube as preferred web-mail interface (with alot of customized plugins) - openmediavault/openfiler linux distros for NAS - HA clustering (failover based on DRBD and heartbeat/pacemaker+corosync) - NUT (daemon for UPS monitoring and controlling) - openvpn (with various configurations and backends) - pptp vpns (with various configs and backends) - all kind of linux distributions - RH, CentOS, openSuSe, Debian, Ubuntu, Gentoo, Arch.... - hardening of linux distributions (iptables, fail2bain, allow/deny mechanism, AIDE, SELinux, AppArmour, occasional pen testing) - puppet automation - rancid (centralized backup of config files) - bacula, urbackup and rsync backup
Linux System Administration
Cluster ComputingPleskCitrix HypervisorMikroTik RouterOSPostfix SMTP ServerVarnish CacheMySQLcPanelNGINXDockerSystem MonitoringNetwork SecurityNetwork AdministrationCentOS - $50 hourly
- 5.0/5
- (26 jobs)
Organised, communicative, hardworking DevOps System administrator. I love what I am doing, my job is my passion. In recent years I have engaged in DevOps and System/Network Administrator, experienced in the implementation of different projects from simple site to startup with big community. I believe that only hard and honest work can bring needed result. Here are my best skills: Platforms: Linux (RHEL / CentOS, Ubuntu Server / Debian), FreeBSD, Microsoft Windows Server 2003/2008/2012R2/2016/2019 DevOps: GIT, Jenkins, Docker, Ansible, Icinga, Kubernetes Network solutions: Cisco routers, Mikrotik RouterOS, Hewlett-Packard ProCurve Web Server: Apache, NGINX, IIS Mail: Postfix, Dovecot, Cyrus IMAP and others Databases: MySQL, PostgreSQL, MSSQL Virtualization: KVM, Xen, OpenVZ, HyperV Cloud Technologies: Amazon Web Services (AWS), DigitalOcean Security tools: iptables, pfSense, VPN, OpenSSL Additional skills: VoIP services (Asterisk, FreeSWITCH, Cisco) Programming: BASH Diagnostic services: Nagios, Icinga, Zabbix, Grafana
Linux System Administration
Database AdministrationPleskTechnical SupportWindows AdministrationcPanelNetwork AdministrationAnsibleGitAmazon Web Services - $39 hourly
- 5.0/5
- (21 jobs)
Since 2004 I have been working in the IT sector. I started with the technical support of users. The last 15 years engaged in the administration of servers running under Windows and Unix-like operating systems. I have extensive experience in deploying software solutions for different tasks. I work with: Linux*, *BSD, Windows Server. WEB: Apache, Nginx, PHP. Database: MySQL, Postgress, MSSQL (OLAP). Monitoring: Nagios, Zabbix, Munin, Awstats, MRTG. And other famous (and not so) systems (Samba, Squid, ELK Stack, bind, ISC-DHCP, Sendmail, postfix, dovecot..)
Linux System Administration
LinuxCentOSVMWareFirewallNetwork AdministrationWindows ServerAdministrative SupportMicrosoft WindowsServer Density Server MonitoringProxmox VEFreeBSDWeb HostingDebianDevOps - $30 hourly
- 5.0/5
- (1,153 jobs)
With over 15+ years of hands-on experience in the dynamic world of web hosting, I am passionate about optimizing digital landscapes for businesses to thrive. Throughout my career, I've been at the forefront of technological advancements, consistently delivering reliable and innovative hosting solutions that fuel online success. Let's connect to explore how my extensive web hosting experience can benefit your projects or organization. Whether you're seeking advice, considering a hosting upgrade, or just want to discuss the latest trends in web hosting technology, I'm here to help. Feel free to reach out or connect with me. I look forward to networking and sharing insights in the exciting world of web hosting!Thank you for your interest. PS: I am not accepting any job related to adult contents and pornography, alcohol/drug, illegal access and against the law.
Linux System Administration
SendyTechnical SupportAmazon LightsailPleskVirtual Private ServerApache AdministrationDomain MigrationLAMP AdministrationWordPresscPanelCentOSAmazon Web Services - $50 hourly
- 5.0/5
- (126 jobs)
Over 10 years experience as Linux administrator . Configured and maintained hundreds of servers having different tasks : web server (Apache/Nginx+php/ruby/perl), mail server (with AV and spamassassin), file server, mysql/postgresql, dns, IM server, VOIP, firewall/VPN. As a network administrator in a small WISP i built my skills up in wireless, routing/BGP, routers/swithes/firewalls, network monitoring/troubleshooting. I write my own scripts (shell/Perl) . Also i have limited experience in programming, mostly Php and C.
Linux System Administration
Amazon EC2LAMP AdministrationComputer NetworkMySQLDNSPHPPerlNetwork AdministrationBash - $17 hourly
- 4.9/5
- (25 jobs)
With over 7+ years of hands-on experience, I am a seasoned Linux System Administrator ready to tackle your server challenges and enhance your system's performance and security. As a dedicated professional, I specialize in the following key areas: 🛠️ Server Configuration and Optimization: Transforming server setups into efficient powerhouses is my forte. From initial configuration to ongoing performance optimization, I ensure your systems run seamlessly. 🔐 Security Hardening: Protecting your digital assets is paramount. I implement robust security measures, including access controls, firewalls, and regular audits, to safeguard your servers from potential threats. 🚀 Network Administration: Streamlining network operations is crucial for any business. I bring expertise in network design, implementation, and troubleshooting, ensuring your systems communicate flawlessly. 🤖 Scripting and Automation(Shell, python): Boosting efficiency through automation is a game-changer. I leverage scripting languages to automate routine tasks, saving you time and resources. 💼 DevOps Integration: As a Linux DevOps enthusiast, I seamlessly integrate development and operations, fostering collaboration and accelerating your software delivery pipeline. 🌐 Multi-Distribution Proficiency: Whether it's Debian, CentOS, Ubuntu, or others, I am well-versed in various Linux distributions, ensuring adaptability to your specific needs. 🏆 Proven Track Record: Throughout my career, I've successfully managed numerous projects, overcoming challenges and delivering results that exceed expectations. Let's collaborate to take your Linux infrastructure to new heights. Whether you need a one-time system overhaul or ongoing support, I am here to contribute to your success. Contact me to discuss how we can elevate your systems together!
Linux System Administration
Amazon EC2SSLUnix ShellDevOpsMySQLWeb ProxyR ShinySMTPGoogle Cloud PlatformNGINXApache HTTP ServerUbuntuLinuxCentOS - $11 hourly
- 4.9/5
- (198 jobs)
I am system/network administrator for over 14 years. Main specialization: * AWS/AmazonWebServices * Linux (Debian/CentOS) * LAMP/LEMP, PLESK, WHM/CPanel, VestaCP hosting panels * Websites/appalications/servers migration * Virtualization (KVM/LXC) * VoIP - Asterisk(IVR, DialPlan), Grandstream VoIP Phones(provisioning), Cisco VoIP Phones * Monitoring (Sensu+Grafana, Nagios, Zabbix, Cacti) * Networking * Cisco/Juniper/DLink/ZyXEL Switches/Router * VPN solutions - openvpn/ipsec/IPoE Good knowledge of CMS WordPress Basic knowledge of HTML, CSS, PHP, Perl, Ruby
Linux System Administration
Amazon Web ServicesNGINXAmazon EC2LAMP AdministrationDNSCisco RouterPleskNetwork AdministrationFirewallJuniperVPN - $24 hourly
- 5.0/5
- (49 jobs)
I am primarily a .NET/C# developer with a preference for working on backend systems, but have zero reservations working on the frontend. Most recently I've been diving deeper into AWS services, Azure, and making decryption software. I've worked on a wide variety of projects, including: ✔ All flavors of .NET Framework / .NET Core ✔ Custom licensing software & C# app to demonstrate the API ✔ User membership system for a gym ✔ Performance tuning of websites ✔ Database development ✔ Responsive web development ✔ LIVE migration of a high traffic website that needed minimal downtime ✔ Ginormous desktop applications ✔ & More Over the course of my career, I have consistently been considered a thought leader. Someone who brings the larger picture to the conversation while keeping the details relevant. Being able to identify seams in software to remove technical debt and introduce more relevant technologies, patterns, and frameworks. More importantly, I have openly shared my knowledge with those around me and learned just as much by listening to others. I believe the following quotes from past clients best sums up the experience of working with me: "Excellent professional. Didn't stop until job was done. All job was complete, very fast time. He was faster compiling code than we were at testing it. Will hire in the future for sure." "Great experience, he was able to quickly setup our forum perfectly and install many addons, and even helped fix some errors we had on our main site. Very much appreciate his work and would hire a again." "Zach communicates clearly and concisely, he completed this job very quickly without issue, looking at his CV, this was a piece of cake to a highly experienced and competent engineer. Thanks Zach." "The best. I had an emergency repair need for my website, one day before leaving for a conference. Zachary fixed it in under an hour, and fixed it perfectly. The issue was a SSL problem that had locked me out of my Wordpress dashboard, and a couple of redirect issues. Super fast, responsive, and got the job done immediately. I couldn't be happier! Highly recommend."
Linux System Administration
.NET CoreVirtual Private ServerASP.NETReverse EngineeringNetwork AdministrationNGINXDatabaseLinux.NET FrameworkDigitalOceanC#PHPMySQL - $70 hourly
- 5.0/5
- (172 jobs)
Accomplished systems administrator with 20+ years of experience managing server infrastructures and data-center operations across multiple platforms. Effectively plan, install, configure and optimize the IT infrastructure to consistently achieve high availability and performance. Extensive experience in the design, implementation, and orchestrating of distributed, scalable, and fault tolerance systems. I'm focused on new ways of using technology to turn your insights into new digital products. Other tech Skills: Ubuntu, Docker, Kubernetes, Consul, Python, Ansible, Terraform, VPN, Nginx, BIND, PowerDNS, DHCP, LDAP, AWS (EC2, ECS, Elastic Beanstalk, Batch, RDS, Lambda, S3, IAM, etc), Git, SVN, TeamCity, Jenkins, Gitlab CI.
Linux System Administration
LinuxTerraformDistributed ComputingKubernetesGitLabNGINXPythonAnsibleAmazon Web ServicesDocker - $55 hourly
- 4.9/5
- (392 jobs)
I am working: - 20+ years on IT - 10+ years on AWS Cloud projects I am a team leader of AWS Advanced Consulting in multiple projects. Self-starter who applies individual initiative to complete the job on time and provides operational and automation support with a 24/7 technical response team staffed by AWS.
Linux System Administration
DockerAnsibleTerraformPHPCI/CDKubernetesWeb ServiceMySQLDevOpsSolution ArchitecturePythonSystem AdministrationLinuxAmazon Web Services - $90 hourly
- 4.9/5
- (514 jobs)
Top-ranked self-motivated professional DevOps and Cloud architect with strong work ethic and productive self-starter – proven with success being a freelancer at Upwork(ex-oDesk). Team player - Participated in multiple projects, joining large teams, effectively co-working with other professionals. Among my long-term customers: - Stanford University - Motorola - Bwin Interactive - Fairchild Semiconductor - Texas Instruments Effective leader - Took over leadership and managed team resources to achieve goals meeting deadlines Experience: 24+ years as an Systems Administrator 17+ years as Network Engineer 12+ years as Cloud Expert and SaaS Architect 8+ years @ DevOps Freelancer for last 14 years (over 70,000hrs worked @oDesk/Upwork)
Linux System Administration
Deployment AutomationCI/CDDockerUnix ShellDevOpsMySQLNetwork AdministrationAmazon Web Services - $30 hourly
- 5.0/5
- (22 jobs)
I am an accomplished python developer with 2+ years of development experience. I have had the experience of working on large projects with MNCs, startups (including my own) and the prestigious Google Summer of Code program. I'm an expert in building robust, python based web applications/API, data pipelines, advanced scientific programs, algorithm design/development and expert with AWS solutions architecture. With a strong background in research and development, I love working on complex computational challenges. One such project was creating a combinatorial optimization algorithm, where my research was also published by Springer. I am interested in working on large scale applications and eager to perform high level, end to end development of complex applications. My technical expertise includes: - Front-end: HTML | CSS | JQuery - Back-end: Django / Flask / Celery - Database: PostgreSQL / MongoDB - AWS: EC2, ECS, S3, Batch, IAM, Lambda, Route 53, CloudFront, CloudFormation, RDS, DynamoDB, CodeBuild, CodePipeline - Cloud services: System design/Automation/CI/CD - Devops: Docker, Kubernetes, Github, Nginx - Scientific python libraries: Pytorch, Tensorflow, OpenCV, Pillow, Numpy, Pandas My expertise includes: - Building scalable applications in Python, Django/Flask/Celery, REST and GraphQL APIs. - Deploying your entire application on AWS and automating the processes. - Writing efficient, reusable, well-documented and test driven code. - Experienced in integration of third party API's and plugins. - Integrating scientific python libraries for bringing advanced functionalities to your software. - Use of devops tools like Docker, Git, Nginx, Gunicorn. Why choose me: - Solid industry experience - Impeccable project management skills - Quick delivery of ready-to-use projects - 24/7 here to respond to any of your messages Let's get in touch, discuss your project requirements and build something amazing together.
Linux System Administration
GISSoftware Architecture & DesignBash ProgrammingCeleryNoSQL DatabaseDevOpsC++PythonPostgreSQLFlaskDjangoAmazon Web Services - $45 hourly
- 5.0/5
- (218 jobs)
DevOps ✅ DigitalOcean/AWS/GCP ✅ cPanel/WHM/Plesk/Virtualmin/VestaCP ✅ Ubuntu/CentOS Last 14 years I have engaged in system administration using Nginx, Apache, PHP, Python and MySQL including sites for startup companies and small businesses. I have extensive experience in the deployment of sites and projects of varying complexity, and I am seeking opportunities to help you to build your business. I have great experience in: 🟢 Hosting providers: 🔸 OVH 🔸 Softlayer 🔸 Hetzner 🔸 AWS 🔸 GoogleCloud 🟢 Cloud Hosting: 🔸 Digitalocean 🔸 Amazon (EC2, AWS, S3) 🔸 Linode 🔸 GoDaddy 🔸 Rackspace 🟢 Docker related stuff 🟢 Docker-compose 🟢 Linux maintenance/troubleshooting: Debian, CentOS, Gentoo, Ubuntu, RHEL etc 🟢 Apache2 + Nginx, Nginx + PHP-fpm, Nginx + PHP-fastcgi, MySQL, Varnish, Memcached. 🟢 Linux serverside: iptables, rsync, Bind, OpenVPN, 🟢 Mail: Exim, Dovecot, Postfix. 🟢 Backup/Migration 🟢 Hosting panels: Plesk, cPanel/WHM, ISP , DirectAdmin, Virtualmin, VestaCP 🟢 Virtualization: Xen, KVM, OpenVZ, Proxmox 🟢 Monitoring: Zabbix, Munin, Cacti, Nagios 🟢 CMS : Wordpress, Drupal, Magento, CS-Cart
Linux System Administration
Docker ComposeDevOpsDrupalSSLLAMP AdministrationWordPressVirtual Private ServerDigitalOceanDjangoAmazon Web ServicesCentOS - $40 hourly
- 5.0/5
- (126 jobs)
I have 35+ years experience in network projects including design, implementation, system administration and in software development. For the first 5 years of my career I worked on software development: coding and especially testing. For the last 30 years I'm working on implementation and maintenance of University of Nis WAN. Last 26 years I'm deeply involved in AMRES (Academic Network of Serbia) project. Don't fix it if it ain't broken, don't break it if you can't fix it! SKILLS SUMMARY - Any system administration tasks - Operating Systems: any *nix (Linux, FreeBSD, SGI IRIX, SCO, Solaris, OSX), Windows 3.1/9x/Me/XP/Vista/W7/W8/W10/W11, WinServer NT/2K/2003/2008/2012/2016 - LAN & WAN: Ethernet, Fast Ethernet, Gigabit Ethernet, FDDI and Wireless LANs. T1/T3, SDH/SONET, Frame Relay, WDM, ISDN, ADSL, SHDSL, Cable Modems, Cellular, X.25. - Network Protocols: TCP/IP, IPv6, UDP, OSI, CDP, IP Multicast, IPSec, VoIP, Routing, VLANs, Bridging, Trunking, VPN, SNA, DLS - Network Services & servers: SMTP/POP3/IMAP, FTP/SFTP, Telnet/SSH, HTTP/HTTPS, DNS, DHCP, NNTP, NTP, LDAP, SNMP, NETBIOS, Apache, Nginx, MySQL, Plesk, cPanel, Zimbra, VMware, CentOS, Ubuntu, Debian - Network Equipment: various types of modems, firewalls, switches and routers. - Dedicated, VPS and cloud environment servers (Amazon AWS, Google Cloud, MS Azure, Digital Ocean, Linode). - Programming Languages: Unix Shell scripting, BASH, C, Pascal, MS Visual Basic, PHP, HTML, (a bit of Python).
Linux System Administration
CentOSUbuntuSystem AdministrationApache AdministrationSSLLet's EncryptFirewallRed Hat AdministrationInternet SecurityCloudflareZimbra AdministrationUnix System AdministrationNetwork SecurityNetwork Administration - $65 hourly
- 4.2/5
- (290 jobs)
Leave the development/modification/management to us, and use your free time to focus on your business. Discover the benefits of working with a U.S. "Top Rated" Developer with over 17+ Years of Development experience (Wordpress / Magento / Shopify): ☑ Easy communication. No more "Oops sorry I don't understand" or mix up due to translation problems. Schedule a call with me any time to go over any new tasks or upcoming projects. ☑ Safe and Secure. 3rd world developers may not be who they say they are. They will use Upwork jobs to get onto your server/system and install malware and credit card siphoning programming. My identify is verified and I've been a trusted member of the Wordpress/Magento eco-system since 2007. ☑ Enterprise level ticket system. I utilize one of the top support/work flow ticket systems in the industry. You will be able to easily create new support tickets/issues with me and have your problem handled efficiently. ☑ Integration with our private GIT repository. This means that all work that is not ideal to be performed in the live admin (the majority of development work) will occur on a local development copy. All modifications are recorded in our GIT versioning system for a full history and clarity regarding changes made throughout the life of our business relationship. ☑ Full development process. Each issue/task goes through a comprehensive workflow that includes: Investigation and clarification, Development process, Quality Assurance review, Code Review, and Deployment. 20,000+ Working hours.
Linux System Administration
MySQL ProgrammingShopify ThemeShopify AppsShopifyHTML5HTMLEcommerce Website DevelopmentWooCommerceMagentoPHPWordPressEcommerce Development ConsultationUnixWordPress ThemeMagento 2 Want to browse more freelancers?
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