Upwork home
Sign up
Secondary

Hire the best CentOS Developers in the United States

Check out CentOS Developers in the United States with the skills you need for your next job.
Get started
Clients rate CentOS developers
Rating is 4.9 out of 5.
4.9/5
based on 159 client reviews
  2. Development & IT Talent
  3. CentOS Developers
  4. (Current) United States
  • $200 hourly

    • 5.0/5
    • (50 jobs)
    Network & Linux web server security systems specialist Proactive, IT professional with success directing a broad range of corporate IT initiatives while participating in planning, analysis, and implementation of solutions supporting strategic business goals. Specializing in design, implementation, and break-fix of secure networks and systems; emphasizing on security, availability, and serviceability
    Featured Skill CentOS
    Scripting
    Web Application Firewall
    Firewall
    LEMP Stack
    Systems Development
    Embedded Linux
    Linux System Administration
    DevOps
    WordPress
    cPanel
    LAMP Administration
    Linux
    Amazon Web Services
  • $65 hourly

    • 4.5/5
    • (144 jobs)
    AARON SUMMERS Independent Contractor April 2009 - Current • Provide remote Linux, networking, and application support for a variety of clients around the world. • Develop a custom SugarCRM, Xero Accounting, Concrete5 web store using PHP and MySQL. • Daily maintenance and security auditing of around 30 machines. • Build complex cloud based scalable solutions on Amazon EC2. • Scripting and automation of Linux based administration tasks using Perl and Bash. • Migration of web-servers from physical to cloud based solutions. • Provide end level support for certain clients. UNIX Engineer E Solutions Corporation March 2008 – April 2009 (1 year 2 months) • Responsible for supporting the operations of a Tier-1 colocation facility. Daily engineering and administration of OpenBSD, FreeBSD, Linux and Windows based operating environments. Identified and remedied a large number of network and host based security problems. Stabilized the bandwidth billing system for accuracy and provided assistance to the web development team. UNIX System Engineer Hilton Grand Vacations November 2006 – March 2008 (1 year 5 months) • Designed and built a custom Enterprises Data Ware House utilizing RedHat™ Enterprise Linux, IBM™ Information Server, and the Sun™ N1 toolkit. Back ported the RedHat™ clustering tools and GFS modules for RedHat™ Enterprise Linux 4. • Customized the operating environment for running the IBM™ Information Server 8 family of applications, consisting of IBM™ DB2 V 9.3, IBM WebSphere 6.0, IBM™ DataStage and IBM™ QualityStage. • Was the single onsite operations point for the HP-UX, Solaris, FreeBSD, MacOS X, and Linux machines. Designed and implemented the company’s external web presence using Solaris 10. Utilized zones, the ZFS file system, and hardware RAID on the T2000 platform. Wrote my own tools in Perl, C, and the Bourne shell. Debugged many complex operational problems. UNIX Administrator at Vortech, Inc. 2004 -2006 (2 years) • Responsible for the day to day operations of over 160 production servers. Maintained UNIX web, database and name servers based on FreeBSD 4.11 – FreeBSD 6.1 Built FreeBSD based servers for web hosting, backups, and network monitoring. Built Linux, Windows 2003, and Windows 2000 based servers for use in collocation. Provide phone and email support for web hosting and collocation customers. UNIX Administration and Technical Support at Magna Computer Corp September 2003 -May 2004 (9 months) • Built Linux and SCO OpenServer based servers. Provided support for custom software designed for the timeshare resort industry. Built programs and reports using technologies such as Apache, Perl, and XML. Extensive configuration and tuning of RedHat, Fedora, and SuSE Linux. UNIX System Administrator & Network Engineer at Independent Consultant November 2001 - July 2003 • Designed and implemented OpenBSD, Linux, and Windows 2000 Servers in a collocation environment. Extensive use of Apache, Perl, PHP, MySQL on UNIX. IIS Configuration experience, ASP, ActivePerl. Constructed web based application servers from scratch using previously mentioned operating systems as an install base. Console programming with C and ncurses. Experience with X11 API and GTK toolkit. Second Level Support at Jobwarehouse.com • May 2001 -September 2001 (5 months) • Supporting the primary website and data processing efforts. Networking and Integration at Magna Computer Corp September 1999 -June 2000 (10 months) • Develop TCP/IP based UNIX and Windows intranets. Provide technical support for SCO UNIX and Magnaware applications. Setup and maintain OpenBSD, FreeBSD, Linux, SCO UNIX and Windows based servers and workstations. Education Winter Park High School 1992 - 1996 – Gifted Program Valencia Community College 1996 – 1998 Contractor Recommendation "Aaron is a very good systems engineer for Linux, UNIX and Windows. He has an in depth understanding of system internals. I found him to be an honorable man that stands behind his word and keep on track of the project. He has always been friendly and a good attitude even when he is upset. He would make a good supervisor in any company." — Shelton R., Sr. IT Consultant / DB2 DBA Expert, Xtivia, worked directly with Aaron at HGVC
    Featured Skill CentOS
    MySQL
    Linux System Administration
    Virtualization
    OpenBSD
    Network Security
    Iptables
    Unix Shell
    FreeBSD
    Snort
    Amazon EC2
    Linux
    System Monitoring
    Apache HTTP Server
    System Administration
  • $40 hourly

    • 5.0/5
    • (6 jobs)
    Highly accomplished and motivated Senior Software Engineer with over a decade of hands-on experience. Proven track record of delivering innovative and secure solutions and driving project success through the application of cutting-edge technologies. Adept at leading cross-functional teams and collaborating with stakeholders to achieve business objectives. Currently building and testing secured RestAPIs, Web Apps, and Mobile Apps using technologies such as GCP, AWS, Azure, Python, Pandas, Flask, ORM, Powershell, SQL, NoSQL, Bash, JavaScript, TypeScript, HTML, CSS, Jest, Solidity, React, React Native, Vue, Node, Redux, Expo, Google Firebase, Clerk, Ansible, AWS CDK, Azure DevOps, Azure Pipelines, Windows Server, Linux, Docker, Microservices, VPN, Blockchain, Networking, Virtualization, and more.
    Featured Skill CentOS
    Amazon Web Services
    Web Development
    Vue.js
    React Native
    Firebase
    Linux System Administration
    NoSQL Database
    Node.js
    React
    Python
    MySQL
    JavaScript
  • $50 hourly

    • 5.0/5
    • (3 jobs)
    I can help you do many things when it comes to Linux Servers, including configuring a new build as well as troubleshooting issues on an existing build. I can help with LAMP/LEMP stacks, file/directory permissions, SSH/sFTP user management, and more. I am also well-versed in current standards with the SSL Industry. I can help with Cipher profiles, Certificate installation, Let's Encrypt solutions, and more. I have been working in the IT industry for over 10 years, with the past 4 years focused on Linux Servers. I currently work as a Site Reliability Engineer and SSL Subject Matter Expert for a web hosting company.
    Featured Skill CentOS
    Ubuntu
    DNS
    SSL Certificate
    Linux
    Red Hat Enterprise Linux
    Linux System Administration
    Arch Linux
    Cloudflare
    Apache HTTP Server
    PHP
    MySQL
    NGINX
  • $125 hourly

    • 5.0/5
    • (3 jobs)
    Been leveraging communication infrastructure to help companies expand their ability to communicate on traditional and modern platforms. Recently have been moving to marketing and customer building processes for my own services and getting new and existing customers to better engage their customers. Moved from building physical networks to virtual data and voice networks. Flexible voice services, business text messaging, elaborate email receiving and sending, proactive customer acquisition and relationship building and advertising network management.
    Featured Skill CentOS
    Marketing Automation
    Telecommunications
    Messaging System
    Network Analysis
    Email Automation
    Microsoft Certified Information Technology Professional
    Email Template Development
    Network Security
    Messaging Framework
    Email Deliverability
  • $99 hourly

    • 5.0/5
    • (16 jobs)
    I'm a developer and system's engineer with a passion for computing. Whether it's setting up a wordpress, or building out a multi-tiered cloud computing system, I'm certain I can provide you and your organization with value. HTML, CSS, Wordpress, SEO, Servers (Windows Linux and FreeBSD). I am an American and I speak natural native English, and I am fluent in Spanish. Bash and Linux systems, everything you need, let's make it happen! Looking foward to seeing your next project become a reality together!
    Featured Skill CentOS
    Microsoft Virtual Server
    Ruby
    C++
    Debian
    Systems Engineering
    FreeBSD
    Linux
    Python
    Windows Server
    Ubuntu
    Bash
    Microsoft Active Directory
  • $60 hourly

    • 5.0/5
    • (1 job)
    To Whom It May Concern, I would like to be considered for IT Systems Engineer in your company. At your convenience, I'd appreciate the opportunity to discuss the position and my candidacy with you. I have skill in Microsoft Office Suite /Office 365, Infopath 2010/2013, Enterprise Anti-Virus, Norton ghost, LanDesk, SQL Server 2012, SharePoint 2010/2016, Exchange Server 2010-2016, Certified Casper Technician, Windows Server Administration 2008 - 2019, Windows XP-10, MacOS, Ubuntu/Centos. Given my related experience, hard work ethic, customer service skills, and overall capabilities, I am confident I will make a significant contribution to the success of your company. COMPUTER SOFTWARE/HARDWARE * Windows DHCP, DNS, VPN, Server, Group Policy and Active Directory Management * Centos, Ubuntu, Mac, Windows * Microsoft Office 365 * Clonezilla Live, Norton Ghost, Acronis Snap and Deploy, Windows Deployment Services, Landesk * CCT Certificate
    Featured Skill CentOS
    Cisco IOS
    Cisco Router
    Network Engineering
    MacBook
    Computing & Networking
    Computer Network
    Jira
    Computer Maintenance
    Computer
    iOS
    Microsoft Access Programming
    System Maintenance
    macOS
    Microsoft Active Directory
  • $55 hourly

    • 5.0/5
    • (3 jobs)
    I'm a dedicated professional with proven performance in management, leadership, web development, and building maintainable systems for small to mid-sized companies. If you need to create an online store, build api's to help retrieve data/push data forward, or need internal systems, I can help * Professional knowledge of HTML, CSS, PHP, Javascript, Yii2, and all aspects of Shopify Development * Full project management from start to finish * Continuous communication as that is important to anything that is of high priority
    Featured Skill CentOS
    Shopify Development
    Yii2
    API Integration
    Node.js
    Bootstrap
    jQuery
    React
    Laravel
    C#
    CSS
    HTML
    JavaScript
    MySQL
    PHP
  • $80 hourly

    • 4.6/5
    • (15 jobs)
    ❇️ 100% High-quality work ❇️ I offer comprehensive expertise in designing, implementing, and managing robust network infrastructures and automated DevOps pipelines. My skills ensure seamless operations, enhanced security, and optimized performance for your business needs. Below are my general skills: ❇️ DevOps: GitLab, GitHub, Azure DevOps. Project support, CI/CD ❇️ Optimization of Google Pagespeed, Magento, WordPress, ODOO, Mautic, Drupal, Joomla, Bitrix, Bitrix24, and other CMS ❇️ Operating Systems: Debian, Ubuntu, CentOS, Rocky Linux, AlmaLinux, RedHat, CloudLinux, Gentoo, FreeBSD (administration, configuration, audit, optimization) ❇️ Software Configuration Management: Salt, Ansible ❇️ Web servers: Nginx, Apache, LiteSpeed (installation, configuration, optimization) ❇️ Database servers: MySQL, PostgreSQL, MariaDB, Percona, MongoDB (installation, configuration, optimization, profiling, cluster creation) ❇️ Mail servers: Exim, Postfix, Sendmail, Zimbra, Qmail, Dovecot + Spamassassin, ClamAV ❇️ Webhosting Administration Panels: cPanel / WHM, Plesk, aaPanel, Proxmox, CyberPanel, VestaCP, HestiaCP, ISPManager, Billmanager, ISPConfig, DirectAdmin, Webmin ❇️ Amazon: AWS setup or Amazon tools ❇️ Virtualization: Proxmox, OpenVZ, XEN, KVM, VMWare, VirtualBox, Docker ❇️ Load balancing via: HAproxy, Nginx, Pingora, ProxySQL, PowerDNS, BIND, Route53, Alibaba Cloud DNS ❇️ System Backup and Restore automation ❇️ Network services: DNS (Bind, PowerDNS), VPN (MPD, PPTPD, OpenVPN), firewalls (iptables, ipfw), file server (samba3/4), proxies (Squid, 3proxy, Privoxy, Nginx), DRBD, Ceph, GlusterFS, lsyncd ❇️ Monitoring: Zabbix, Munin, Nagios, Icinga ❇️ FTP: Vsftp, Pureftp, Proftpd Let’s Connect: If you're looking for a reliable and experienced Senior Network Administrator and DevOps Specialist to optimize your network and streamline your development processes, let's discuss how I can add value to your team.
    Featured Skill CentOS
    VPN
    System Administration
    NGINX
    Database Administration
    DevOps
    Apache Administration
    cPanel
    Web Hosting
    Network Administration
  • $100 hourly

    • 5.0/5
    • (9 jobs)
    Experienced Consultant and Developer based in Cincinnati, Ohio. With years of professional IT experience in the Utilities, ISP, Higher-Ed and Defense industries, I'm able to pair my technical know-how with my soft-skills and project management abilities to ensure your project is done right. My business, Helios IT Services, serves clients nationwide via UpWork and many other platforms! Stetson Blake Owner Helios IT Services
    Featured Skill CentOS
    Cisco IOS
    Ubiquiti
    Network Design
    Wireless Network Implementation
    Cisco ASA
    Linux System Administration
    Cisco Certified Network Associate
    Network Engineering
    Python
  • $90 hourly

    • 4.7/5
    • (36 jobs)
    I am a Red Hat Certified System Administrator with 8+ years of experience supporting enterprise Linux environments. Skilled in system monitoring, automation, containerization, and security operations. Key Skills: Linux administration (RedHat, CentOS, Ubuntu, Debian) Windows administration Cloud computing (AWS, Azure) Configuration management (Ansible, Terraform) Containerization (Docker, Kubernetes) System monitoring (Nagios, Zabbix) Automation (Jenkins, CircleCI) Vulnerability management Compliance auditing Networking and protocols (TCP/IP, HTTP, DNS) Experience Highlights: Developed automated patching solution with Ansible to remediate vulnerabilities and ensure compliance for hundreds of cloud hosts Built and integrated infrastructure on AWS and on-premises using Terraform and Kubernetes, improving reliability Supported ecommerce environment with 99.999% uptime by quickly troubleshooting issues across Linux and Windows Monitored servers in a 24/7 on-call rotation using Nagios and Zabbix Migrated systems to the cloud and containerized applications using Docker and Kubernetes I have supported small businesses, enterprises, and MSP clients. My goal is to leverage my Linux, automation, and security skills to improve system reliability, efficiency, and security. Please contact me to discuss your infrastructure and DevOps needs.
    Featured Skill CentOS
    Amazon EC2
    Munin
    Kubernetes
    Automation
    Ansible
    Scripting
    Docker
    Linux System Administration
    Bash Programming
    TCP/IP
    Python
    Linux
  • $35 hourly

    • 4.9/5
    • (20 jobs)
    I have over 15 years of experience in the field of System Administration of Unix and Linux servers. My experience includes: • Managing hundreds physical and virtual Linux/UNIX, Windows, and Mac servers • Managing SaaS services, user accounts, DNS, and e-mail systems • Configuring and monitor backups for hundreds of clients • Deploying code for test and production releases on JBoss and Tomcat servers • Managing and building VMWare ESX, ESXi, and vSphere 5 hosts and guests • Development of custom shell scripts to perform various tasks
    Featured Skill CentOS
    Project Management
    VMware Administration
    Linux System Administration
    Red Hat Administration
    Data Backup
    VMware ESX Server
    Bash Programming
    Windows Administration
  • $200 hourly

    • 5.0/5
    • (24 jobs)
    Howdy, I'm Robert and I hope you're having a great day! I'm a Linux Sys Admin and Devops/Automation engineer with 9+ years in the industry. I'm also Top Rated Plus on Upwork! Problems with scaling that application? Downtime keeping you up at night? Not sure how AWS can have so many different products? I'm the guy who can help! Technologies Ive worked with include Amazon AWS (EC2, S3, RDS, etc), Ansible, Terraform, and many others related to web hosting such as Nginx and MySQL/MariaDB. Lets schedule an initial consultation and talk about how I can help improve the scalability, reliability, and cost efficiency of your IT infrastructure. Hope to work with you soon!
    Featured Skill CentOS
    AWS Systems Manager
    Linux System Administration
    Amazon EC2
    Zabbix
    Bash Programming
    Apache Administration
    Automation
    DevOps
    Solution Architecture Consultation
    Terraform
    Ansible
  • $227 hourly

    • 4.9/5
    • (124 jobs)
    American Patriot Politically Conservative I'm a 25 year Linux server DevOps and a Top Rated Plus Upwork expert. I'm available for you, whether we establish a contract or not. I'm here for you, so let's talk about your issues and how I can solve them. For more than 9 years, I've been a Top Rated Plus Upwork full-time freelancer (less than 1% of all Upwork freelancers achieve a Top Rated Plus status for more than 2 years), I've been writing code since 1983 and I'm always available for questions, whether we work on a contract or not, please ask my advice. I'm here for you. I have extensive experience with server DevOps (think automation), Python, PHP, Javascript and more. I build custom code in a variety of languages to suit my clients. I'm an expert ChatGPT prompt engineer and I can refactor your code for greater success. As an automation expert with years of experience building API connections to systems such as WordPress, Drupal, ChatGPT, Monday, Zoho, SAP, ERPs and more. If you need to manipulate data for your custom automations, I can make this happen for you. I wrote my first line of code in 1983 on a Commodore 64 and I built my first website in 1997. WordPress Hosting: Come join my Auttomatic for Agencies and supercharge your WordPress website! Immediate boost in site performance and all the e-commerce solutions you can imagine for your specific needs. I handle all site migrations and you get WordPress technical support! Unbeatable! WordPress Plugins: As you will see from my training certificates, I take high level PHP courses to keep my skills at their peak. Combined with Microsoft Visual Studio Code, and ChatGPT, building custom solutions for your website takes just days, not months. To see my coding skills, I built a free WordPress plugin that crushes other SEO plugins and it's free. You'll find it in the WordPress directory. PHP Solutions: I've been programming with PHP for nearly 15 years now, and I can confidently build any solution you request. As you can see from my WordPress plugin, working with Namespaces, Classes, Methods, Traits and all that PHP has to offer is exactly what I do. I can refactor the code you have, build GitHub repositories and structure your environment to make your business a revenue powerhouse. Python Solutions: Like PHP, Python has many similar principles and is my go to when building custom Linux server solutions. Whether you need a website, web scraping, web/server interfaces or a custom solution tailored to your specific needs, Python is a great choice and is the professional solution. Linux Server Environments: I have built well over 1,000 physical Linux servers using everything from single processor motherboards to quad processor powerhouse servers. I've built even more virtual servers using the KVM (Kernel Virtual Machine) environment. The success of your business depends on the Linux server setup. If you pay any attention to Elon Musk, he routinely echoes this same sentiment. If you want to be a billionaire, it all starts with the best server configurations. HTML, CSS and JavaScript Solutions: To build the functionality that makes your web site a success, all elements of HTML5, CSS3 and JavaScript must come together for the sake of exceptional user experience. The best websites are on top because it's intuitive and easy for people to buy their products and services. The best solution is the one that makes you money. That's what I'm here for. Website Security: Starts with being hosted in the WordPress ecosystem. Whether it's SELinux or AppArmor, the two most popular choices, these security programs can keep all your data safe and are required for some industries. I've been working with these programs for over 20 years. SSL security certificates are the key to locking down your website, email server or app. These certificates are required in any case where you're collecting personal information about your client's, selling a product or service, or maintaining compliance for HIPPA and credit card laws. They all have a short lifespan and must be continually updated and configured. Private In-House Server: Need your own private web/email server? Whether you want an Amazon AWS, Microsoft Azure or your own private in-house server setup, I can do all of this remotely. Whether you want a web/email server, or just a linux box in-house, I can make this happen (CentOS/Redhat only). Your new server will have SSL/TLS, DKIM, DMARC, SELinux and tight security. WordPress SEO: Search engine optimization is the practice of building your website to reach the first page of Google. I have built a free WordPress plugin that lays the foundation for Google first page search results. Then, the premium version of this plugin, CodeSEO AI, will actually build all the categories and tags for your entire website. You can download the free version directly from the WordPress directory above. Please tell me what I can do for you and let's make you successful! Thank you! Tom Heibel
    Featured Skill CentOS
    MySQL
    Virtual Machine
    Database Architecture
    Data Scraping
    AWS Server Migration
    Search Engine Optimization
    WordPress
    DigitalOcean
    Page Speed Optimization
    PHP
    System Monitoring
    NGINX
    DNS
    Amazon Web Services
    System Administration
    Apache HTTP Server
  • $50 hourly

    • 4.8/5
    • (14 jobs)
    Sr. Linux Systems Engineer/Architect Available to build solutions for your business or office, servers and website. I have over 30 years of continuing experience in Information Technology and can perform any tasks you might need to help you with your systems, site, or application platform. I carry a high specialty in Puppet System Administration, setup, training, and consulting, and can help you establish your automation practice, troubleshoot your issues, and stay on retainer for any needs you may have.
    Featured Skill CentOS
    Unix
    Sendmail
    Puppet Administration
    Puppet
    Apache Administration
    Linux System Administration
    Cloud Architecture
    FreeBSD
    Ubuntu
    Amazon Web Services
    Perl
  • $100 hourly

    • 5.0/5
    • (49 jobs)
    I specialize in Linux solutions and services. I have extensive experience installing and configuring Debian, Redhat, CentOS, Fedora, OpenSUSE and Ubuntu servers. In the past I've also worked with Solaris and some work with FreeBSD. I've been working with Linux and open source software for over 15 years. Some of the services I can set and configure are: e-mail servers and web servers (known as the LAMP stack). Virtualization: I've configured numerous KVM servers, also experienced with Amazon EC2, and VMware. Asterisk based VoIP solutions are something I've worked on in the past (typically configured with FreePBX as a front end). Also I'm very familiar with network security. Anything from setting up firewalls, to VPN's utilizing the OpenVPN server or Wireguard. Some of my side projects are setting up Home Assistant for home automation and Frigate for object based detection. You'll find my skill set diverse enough to handle almost any Linux based project.
    Featured Skill CentOS
    Asterisk
    System Administration
    Linux
    Virtual Machine
    Raspberry Pi
    Ubuntu
    Kernel-based Virtual Machine
    openSUSE
    OpenVPN
    LXD
    Ceph
    Internet Security
    Fedora
    Linux System Administration
  • $125 hourly

    • 5.0/5
    • (2 jobs)
    I have over 10 years experience in the industry in a variety of roles and platforms with expert knowledge of RDBMS systems including Oracle, MySQL, and SQL Server. Having lead many design/development efforts I believe I have a holistic view and approach to designing and implementing total solutions. In addition to software development I have also supported and lead production and development operations teams. My approach is very “hands on” with regard to evaluating and prototyping solutions whether it’s coding up Java applications to test API integration, developing automation scripts for “hands off” deployments, or building an entire pipeline in Amazon AWS to illustrate advanced DevOps concepts and “infrastructure as code” techniques. I have also designed and developed software solutions for decision support systems, web applications, SaaS systems, mobile platforms, client server, and SOA solutions. I am an expert at Linux, MS Windows, Mac OSX, Unix, and Virtualization platforms.
    Featured Skill CentOS
    SQL
    Python Script
    IBM MQ
    Smart Contract
    Java
    JavaScript
    WebAPITesting
    Apache ActiveMQ
    Red Hat
    MongoDB
    Cybersecurity Tool
    Linux
    Ubuntu
  • $35 hourly

    • 5.0/5
    • (3 jobs)
    My background is in computer forensics, but have current working experience in Linux system administration, iOS app development, Moodle, Big Blue Button and Wikipedia admin and Firefox, Chrome and Safari toolbar add on development.
    Featured Skill CentOS
    React Bootstrap
    Bootstrap
    Node.js
    Next.js
    React
    Linux System Administration
    PHP
    Python
    JavaScript
    CSS
    HTML5
    Moodle
    Ubuntu
  • $105 hourly

    • 4.7/5
    • (26 jobs)
    I have been a LAMP stack developer since 2003. I have worked primarily with Object Oriented PHP and MySQL during that time. I am competent as a Linux Administrator and an expert Web Developer. I most enjoy using Laravel and Vue at this point in my career but am comfortable in nearly any LAMP/LEMP based environment. I enjoy always learning and finding the best solution to a problem. Here is a list of some of the things I’m familiar with: Object Oriented PHP MySQL & Performance Tuning of MySQL Maria DB Laravel 5+ Vue.js AngularJS 1 & 2 WordPress HTML5/HTML/XHTML JavaScript CSS3/CSS Git XML AJAX SOAP REST fPDF ImageMagick PDO ADODB PHP Linux - (Ubuntu & CentOS) Apache2 Nginx Flexbox MongoDB Composer NPM Google Maps Javascript API YouTube Javascript API Google Analytics Mandrill Email API Twitter API Flickr API USGS Water Data SnowTel StrongLoop/Loopback Parse (by Facebook) and its migration process to Mongo Handlebars.js jQuery jQuery UI YUI2 (with some YUI3) TinyMCE
    Featured Skill CentOS
    LAMP Administration
    Ubuntu
    ETL
    MySQL
    MongoDB
    WordPress
    Vue.js
    Laravel
    PHP
  • $200 hourly

    • 5.0/5
    • (77 jobs)
    Offload the mental stress of sorting out the nitty gritty details of the ELK stack and let me help create your data system for you. Clients often refer to me as their “cheat code” because a brief call with me can replace hours of frustrating trial & error and research. I have a simple goal: 1) To fully understand your needs, 2) Eliminate any stress or confusion, and 3) Deliver precisely what you’re looking for—taking care of all the details for you. I know how frustrating it can be to hire freelancers who complicate things further, communicate poorly, surprise you with unexpected costs, and require so much oversight that it feels easier to handle the work yourself. You don’t need to worry about that with me. Types of work I’ve done: Search Engine Development: Built and optimized high-performance search engines with a focus on user experience, achieving sub-500ms response times. A good search engine prioritizes user experience above all. The user needs to 1) get what they want (relevance), and 2) as fast as you can give it to them <500ms (latency), it's that simple. Full ELK Stack Implementations: Designed and deployed ELK stacks for diverse industries, including healthcare and renewable energy, handling everything from parsing error logs to integrating with third-party tools like Jira and Twitter. Custom Dashboard Creation: Developed visually appealing and functional dashboards for data visualization, enhancing team productivity and decision-making. Automation and Optimization: Automated cluster installations and optimized Logstash/filebeat/ingest pipelines configurations for efficient data processing and error handling. I will explain things in layman's terms and not fill an explanation of how something works with technical jargon. I will be clear with my expectations and love to explain how things work so you can do it yourself. Let's work on your project together so that you can get what you want out of your data. Additional Competencies: API integration with ELK: Facebook, Google Analytics, Twitter, etc... Automation of ELK: Bash and Ansible External Database Syncing with ELK: SQL, MongoDB Misc: Readonly Rest, Own_home, Searchguard, Graphite, alerting, siem, watcher, docker, AWS, OpenSearch Filebeat, metricbeat, packetbeat, Vega, RAG, LLM, AI augmented search, index templates,
    Featured Skill CentOS
    Elasticsearch
    Data Ingestion
    Kibana
    Data Visualization
    Logstash
    Data Analysis
  • $150 hourly

    • 5.0/5
    • (23 jobs)
    CTO with over 20 years of experience in the tech space, specializing in dev team and SaaS product buildout for startups. Hold an MBA, PMP, and Six Sigma Black Belt certification. Expert in micro-services approached architecture, and API development utilizing REST and GraphQL technologies. Technical proficiencies include Python, Django, Flask, Ruby, Go, Docker, AWS, CI/CD, NodeJS, ReactJS, Generative AI
    Featured Skill CentOS
    AWS Lambda
    LAMP Administration
    API Development
    MySQL Programming
    Amazon Web Services
    Microsoft SQL Server Programming
    ETL
    Cloud Computing
    Web Development
    API
    Python
    JavaScript
  • $125 hourly

    • 4.8/5
    • (25 jobs)
    US-based, US/Eastern time zone. Ultimately, I'm looking for permanent, full-time employment (in the $130-180K/USD or Euro range). Clean passport, and willing to relocate to Europe (Malta or northern Italy preferred). In the meantime, I'm available for gigs at a rate of $125/hr. I've provided Unix/Linux consulting for businesses for more than 30 years. I've been a Linux Subject Matter Expert since 1994, with various flavors of Unix going back to 1986. I've been a rescue ninja at multiple Datacenters and Web Hosting startups worldwide. I introduced Linux to the US Federal Government in 2002, and after moving away from Compaq and Sun, worked with IBM/Lenovo assisting the development of IBM's high-density X6 server line. I've worked in/for/with most major world datacenters in engineering, design, and systems administration roles. I've been a WordPress-centric Web Developer since 2003, and often work adding features and maintaining WordPress sites (e.g. minor PHP Development). I'm also a former WHM/cPanel Certified Support Partner, as well as a former WordFence Manual Malware Removal Ninja. NOTE: Please do not try and use me as a "consultant" to teach you Linux. I'm here to DO WORK, and my rate is as it is because of my EXPERIENCE. And while it may seem expensive, think about paying me an hour or two to fix something, rather than paying five or six different people $50 each to fix a problem that never seems to get fixed. ALSO NOTE: If you want a trustworthy administrator, I'm your guy. I have a solid reputation, multiple security clearances, and I'm easily found on LinkedIn with rave reviews from former employers. Keep that in mind, because SCREEN SHARES DO NOT WORK. I type 90wpm on a slow day, and use a Linux Shell to do work --- I type too fast, and Screensharing hinders progress. Trust goes both ways!
    Featured Skill CentOS
    Web Host Manager
    MySQL
    CSS
    WordPress
    cPanel
    Red Hat Enterprise Linux
    Linux System Administration
    WooCommerce
    System Monitoring
    Linux
    System Administration
    Security Management
  • $120 hourly

    • 0.0/5
    • (0 jobs)
    Engineer with over 13 years supporting and leading efforts including Research & Development, Systems Integration, Test & Evaluation, Information Assurance, and Cyber Security. - Experienced with Security Information & Event Management Tools including Elasticsearch, ArcSight, Splunk - IDS/IPS integration, logging, collection, parsing & processing - Support 24x7 Security Operations Centers (SOC) / Cyber Security Service Providers (CSSP)
    Featured Skill CentOS
    Security Management
    Apache Kafka
    Red Hat Enterprise Linux
    Elasticsearch
    Kibana
    Ubuntu
    Systems Engineering
    Microsoft Windows
    Linux
    GitLab
  • $125 hourly

    • 5.0/5
    • (2 jobs)
    I'm a highly experienced and results-driven Software Engineering Manager with a strong focus on AWS (Amazon Web Services) and DevOps practices. I have over ten years of professional experience, and have successfully led and managed cross-functional teams to deliver cutting-edge software solutions for clients across various industries. My expertise lies in architecting, implementing, and optimizing cloud-based solutions on AWS while ensuring seamless integration with DevOps principles to enhance development, deployment, and operational efficiency. From dream to deployment, I can help you build the project you want. Avid traveler, foodie, bookworm, and gamer. 'Do it once, do it right.' Technologies I've worked/played with (no particular order): Python, PHP, JavaScript, Kubernetes, CentOS, Alpine, Jenkins, .net, Bash, MySQL, PostgreSQL, NoSQL, C#, Unity, Apache, Nginx, JavaScript, Node.js, Vagrant, Docker, RESTful API, JSON, XML, YAML, CSS, HTML, git, GitHub (GitFlow and Administration), AWS Tech (Redshift, ELB/ALB, EC2, RDS, S3, Route53, VPC, IAM Administration, Lambda, Aurora, AutoScaling Groups, CloudWatch, EFS, CodePipeline), GCP Tech (Compute Engine, Cloud Functions
    Featured Skill CentOS
    Git
    Code Review
    Digital Project Management
    Cross-Browser Compatibility
    Amazon Web Services
    C#
    Amazon S3
    Cloud Computing
    Database
    Apache HTTP Server
    Bash
    Database Management System
    Amazon EC2
    Docker
  • $89 hourly

    • 0.0/5
    • (0 jobs)
    Pro-active detail-oriented, highly accomplished and results oriented Analyst, Architect, Engineer and Manager. Extensive experience in project management, systems analysis, systems design, systems engineering, quality assurance, mentoring and resource management. Excellent communication skills. Outstanding analytical, decision-making, problem solving and management skills with the ability to effectively document and communicate strategic design. Able to troubleshoot and quickly diagnose technical errors and issues to minimize downtime and optimize productivity. * Effective communication, interpersonal, leadership and relationship building skills * Strong background in systems and networks * Resourceful and well-organized; Skilled in activity planning and task management * Able to learn complex systems quickly * Linux / UNIX administration (RHEL, Centos, Ubuntu, Debian, Solaris)
    Featured Skill CentOS
    RESTful API
    RESTful Architecture
    F5, Inc.
    Perl
    Linux
    Ubuntu
    Bash
    Python
  • $100 hourly

    • 0.0/5
    • (1 job)
    OBJECTIVE Seeking a position as a software test engineer, systems engineer, or cyber security engineer
    Featured Skill CentOS
    Network Engineering
    C
    Computer Engineering
    C++
    C#
    Bash Programming
    Agile Software Development
    Agile Project Management
    Test Development
    Engineering & Architecture
    Computer Network
    Bitbucket
    System Security
    Bash
  • $50 hourly

    • 0.0/5
    • (0 jobs)
    A dedicated and experienced professional with expertise in web design, web development, digital marketing, and web hosting. Currently serving as a Lieutenant at Sarasota County Fire Department while concurrently managing Webink Solutions, a successful web services company. Demonstrated ability to provide exceptional customer support and manage complex projects, showcasing strong technical skills and knowledge of various software applications. Experience: Sarasota County Fire Department Lieutenant Fulfill full-time responsibilities as a Lieutenant in a fast-paced, demanding environment. Webink Solutions Founder and Web Specialist Self-taught web professional proficient in management, development, and creation of web services. Provide web hosting, website design, WordPress troubleshooting, and digital marketing services to clients. Experienced in website migrations, onboarding new clients, and managing hosting servers. Fistbump Media Freelance Web Developer and Customer Support Specialist Over 5 years of experience building Linux-based servers for hosting clients. Manage and provide customer service to over 400 clients, addressing support tickets and inquiries. Assist with various web development projects, including website updates and new site creation. Technical Skills: WordPress cPanel/WHM CentOS Linux Divi Theme Salient Theme MainWP WHMCS HubSpot SEMrush Google Workspace Trello Slack Key Responsibilities: Respond to client support tickets, addressing technical issues and inquiries. Collaborate on web development projects, including updates to existing websites and creation of new sites. Execute website migrations, transitioning clients from old hosting accounts to managed hosting servers. Maintain strong proficiency in a variety of software applications and platforms.
    Featured Skill CentOS
    CRM Software
    Web Server
    WordPress Plugin
    Management Skills
    cPanel
    WordPress Theme
    Digital Marketing
    WordPress Migration
    WordPress Bug Fix
    WordPress
    Web Design
    Client Management
    SEO Strategy
    Web Development
  • Want to browse more freelancers?
    Sign up

How hiring on Upwork works

1. Post a job

Tell us what you need. Provide as many details as possible, but don’t worry about getting it perfect.

2. Talent comes to you

Get qualified proposals within 24 hours, and meet the candidates you’re excited about. Hire as soon as you’re ready.

3. Collaborate easily

Use Upwork to chat or video call, share files, and track project progress right from the app.

4. Payment simplified

Receive invoices and make payments through Upwork. Only pay for work you authorize.

Top cities for CentOS Developers in the United States

Show more