Hire the Best CentOS Developers
in the United States

Clients rate our CentOS developers
Rating is 4.9 out of 5.
4.9/5
Based on 159 client reviews
Avi B.

Winter Springs, Florida

$100/hr
5.0
73 jobs

US-Based. Ex-Google Senior Systems Engineer. I have over 25 years of running Linux infrastructure, websites, system administration and technical services. I can help with: * Linux server troubleshooting, setup & security (CentOS, Ubuntu, Alma, Rocky, etc.) * Apache & nginx web servers * MySQL & MariaDB SQL servers * Email services (dovecot, exim, sendmail) * PHP, Golang, Python programming, Bash scripting * SSL certificate issues * DNS issues * Wordpress issues * Server & website migrations. * VPI/PBX: Asterisk, Kamailio, Twilio, etc. * Compiling software * Web hosting control panels (including cPanel/WHM, etc) * GCP & AWS management * Networking: VPNs, VLANs, routing, switching, DHCP, PXE, BGP, etc * SRE, Devlops, monitoring & logging, etc. After running a web hosting company for 17 years and then working as a systems engineer at Google for 7 years I am now ready to help you with your internet & website infrastructure. I live in the US, work in the Eastern Time Zone and I am available via email, WhatsApp, phone or video calls. If you need a trusted partner to work with your website or infrastructure, then look no further :)

  • CentOS
  • Computer Network
  • Computing & Networking
  • Network Engineering
  • System Administration
  • DevOps
  • Linux
  • Ubuntu
  • NGINX
  • PHP
  • Custom PHP
  • WordPress Installation
  • DNS
  • MySQL
Jeff Q.

Palmer, Iowa

$40/hr
5.0
72 jobs

Networking support: SSLs, Security, DNS, malware & virus removal, bot protection, site transfers, server support: Linux, Redhat, Ubuntu, MacOS, Windows Server, IIS and Apache. I am A+ Comptia certified with a Cisco Networking Essentials certificate, and Amazon AWS Cloud Practitioner certificate. Can build custom WordPress plugins. We specialize in WordPress and eCommerce. We can get your business up and processing credit cards with Stripe, Braintree, PayPal, Authorize .Net, or just about anyone you want. I am an experienced PHP WordPress Developer with a strong background in web development, networking and SQL. I have a proven track record of building and maintaining WordPress sites, developing custom plugins, and managing complex network systems. My expertise extends to various programming languages, operating systems, and web technologies, making me a versatile and valuable asset. Jeff has years of experience with the web technology & computer networking and holds degrees in Technology, Business, plus has numerous certifications. Network Administrator for Windows Server 2022, 2019, 2016, 2012, also for Linux Redhat, and Ubuntu. Get your business online today with a 100% PCI Compliant payment solution. Don't take chances with your customer's credit card information; risking costly charge backs, lost revenue, or legal problems. Have us do your payment forms. SKILLS: Languages/Scripts: PHP, JavaScript, MySQL, MariaDB, HTML, XHTML, CSS3, Regular Expressions, XML & XSLT, ASP, VBScript, Perl, JQuery, JSON, SOAP, Pascal, Assembly Language for 680x0 processors Operating Systems: Windows Server 2022, 2019, 2016, 2012R2, 2008, 2003; Windows Desktop: 11, 10, 8.1, 8, 7, Vista, XP; Mac OS X, Classic Macintosh, Linux, RHEL (Red Hat), CentOS, Ubuntu, Oracle, Fedora, Debian, Rocky, Alma Linux, Cisco IOS, Apple iOS, Android, and more . . . Web: Internet Information Server (IIS) 10, 8, 7, 6 Apache 2, WordPress, Elementor, WooCommerce Software: Adobe CC, Creative Suites CS6, CS5, CS4, Dreamweaver CC, Visual Studio, MS Expression Web 4, Photoshop, GIMP, Illustrator, Inkscape, Office 365 Networking: Active Directory, VirtualBox, Hyper-V, VMWare, PowerShell, VPN, DNS, cPanel, WHM Accounting: Peachtree, Sage 50, QuickBooks, Tax Preparation, GnuCash, Deprecation, Payroll, Inventory Terms: Minimum billing is one (1) hour.

  • WordPress
  • Virus Removal
  • Website Migration
  • Linux System Administration
  • Apache HTTP Server
  • Windows Server
  • Microsoft IIS
  • Ubuntu
  • macOS
  • WooCommerce
  • Web Development
  • PayPal Integration
  • Ecommerce
Mark R.

Missoula, Montana

$95/hr
4.6
380 jobs

I have 15+ years experience and I will save you time & money with my meticulous work & advice for going forward. I've worked for individuals, businesses, startups and 501(c)(3) non-profits. Skills and experience include: • All aspects of WordPress, including PHP, jQuery, HTML and CSS, Genesis and custom themes, Bootstrap CSS and Javascript, and custom fields and functions. • WooCommerce and Stripe, PayPal and other payment systems. • Cloudflare: security, DNS, WAF rules and SSL configurations. • Advanced Custom Fields (ACF) for custom themes and content input. • Site and server speed optimizations using GTMetrix and Google's PageSpeed as benchmarking tools. • SPF, DKIM and DMARC record configurations to ensure email deliverability for email providers such as Google Workspace and Office 365. • Domain verification and DNS records for third-party email services such as Constant Contact, MailChimp, Hubspot, AWeber, Market, Klaviyo, Keap/Infusionsoft and more. • Setup and configurations for SMTP services such MailGun, Mandrill, SendGrid and more. • Technical SEO: Yoast and All in One SEO, XML sitemaps and the Google Search Console and Analytics. • Linux server administration (Ubuntu, AlmaLinux, Debian): Apache Nginx Litespeed, MySQL/MariaDB, PHP configurations, security and performance, Let's Encrypt SSLs. • Paid Memberships Pro setup and customizations. • Web hosts: WP Engine, Linode, Cloudways, Digital Ocean, Liquid Web, Kinsta, Pantheon (git), Flywheel, Pressidium and Amazon AWS. • Migrations from Joomla, ExpressionEngine, Drupal, phpBB, Hubspot, TypePad, Movable Type, Blogger, Wild Apricot, and migrations from "plain" PHP & MySQL sites. • Mastodon server setup, configurations and scalability. Stack Overflow profile: stackoverflow.com/users/85385/markratledge WordPress Development profile: wordpress.stackexchange.com/users/268/markratledge

  • Linux
  • Ubuntu
  • Page Speed Optimization
  • MySQL
  • Firewall
  • Linux System Administration
  • WooCommerce
  • Theme Customization
  • Internet Security
  • WordPress
  • Cloudflare
  • PHP
  • Database Optimization
  • HTML5
Ehteshamuddin M.

Phoenix, Arizona

$25/hr
4.5
74 jobs

🎯 100% Refund If I set the wrong expectations and can’t deliver. No questions asked. Top-Rated Plus, Upwork Top 1 Percent, Highly recommended. What do I offer: 1- 100% work satisfaction 2- 24/7 Support 3- On-time delivery 4- Enterprise quality 5- 15 Days of free support after completion of the project Cloud Architect with 10+ years of DevOps experience, specializing in scalable, platform-agnostic cloud infrastructures. Proven track record in high-scale environments. Proficient in Infrastructure as Code, automation, and scripting, with expertise in CI/CD, Cloud Services, and Infrastructure Automation. Skilled in building, deploying, and managing applications on AWS, GCP, Azure, and OCI, with a focus on robust monitoring and observability. ➜ Zazmic Inc, San Francisco, CA • Automation Tools: Terraform, Ansible • Cloud Platforms: GCP • Containerization: Docker, Helm charts • CI/CD: GitLab CI • Monitoring: HPA, Cloud Armour • Databases: Different kinds of databases on GCP ➜ Tripleseat, Concord, Massachusetts • Cloud Platforms: Azure, GCP • Containerization: Docker • CI/CD: Azure Pipelines, Azure DevOps • Monitoring: Grafana, Prometheus ➜ Century Communities, Inc., Greenwood Village, CO • Cloud Platforms: AWS, Oracle Cloud • Automation Tools: Lambda functions, Ansible • Containerization: Docker, AWS ECS, EKS • CI/CD: CircleCI, GitHub Actions, AWS CodePipeline • Monitoring: CloudWatch, CloudFront ➜ Summary: • Proficient in Kubernetes, I architect and manage clusters to facilitate agile and scalable application deployment. • Skilled in Infrastructure as Code (IaC), I employ Terraform, Ansible, and Chef to automate configuration and ensure uniform environments. • With hands-on experience in CI/CD pipeline creation and maintenance using Jenkins, GitLab CI, and Azure DevOps, I ensure the efficient and reliable delivery of software products. • Possessing a robust background in Linux/UNIX system administration, including expertise in managing RHEL environments. • Armed in scripting with Bash and Python to streamline automation processes and optimize operational efficiency. • Good Know how of monitoring and logging tools such as Elasticsearch, CloudWatch, Prometheus, and Grafana, enabling proactive monitoring of infrastructure and application health. • Experienced in VMware virtualization, proficiently managing VMs, executing V-motion operations, and maintaining Snapshots. • Adaptable to fast-paced 24/7 production environments, providing responsive on-call support, including weekends. • Successfully deployed and managed scalable microservices on Kubernetes clusters across GCP and AWS platforms. • Expertise extends to migrating on-premises workloads to the cloud, focusing on performance optimization and cost efficiency. • Possess proactive problem-solving and troubleshooting skills essential for maintaining high-quality production environments. • Strong communication and collaboration abilities, facilitating effective bridging of the gap between development and operations teams. ➜ Tools: Git, Ansible, AWS CloudFormation, ELK, GitLab, GitLab CI/CD, Terraform, Docker Compose, Grafana, Telegraf, CircleCI, Traefik, Amazon CloudWatch, Amazon Elastic Container Service (Amazon ECS), GitHub, VPN, AWS Fargate, Amazon CloudFront CDN, AWS IAM, Amazon Virtual Private Cloud, Docker Swarm, NGINX, Puppet, Jenkins, Amazon EKS, Amazon Simple Queue Service, RabbitMQ, Celery, TeamCity, Nagios, Makefile, AWS CodeDeploy, Confluence, AWS CodeBuild ➜ Platforms: Linux, Docker, Amazon Web Services, AWS Elastic Beanstalk, Amazon EC2, Kubernetes, AWS Lambda, Windows, Apache Kafka, JVM, Heroku, Azure, WordPress, New Relic, Windows Server, Google Cloud Platform, Blockchain, Rancher ➜ Storage: Amazon Aurora, Amazon S3, MySQL, MongoDB, InfluxDB, Redis, On-premise, Amazon DynamoDB, Redis Cache, Elasticsearch, MySQL, Databases, PostgreSQL ➜ Languages: Python, Bash, Java, PHP, Markdown, Go, JavaScript, SQL, TypeScript ➜ Frameworks: Flask, Django, Windows PowerShell, .NET, Serverless Framework ------------------------------------------------------------------------------------------------------ #CloudArchitect #DevOps #Kubernetes #Terraform#Azure #GCP #Docker #CI_CD #InfrastructureAsCode #CloudMigration #DevOpsEngineer #Automation #CloudInfrastructure #Microservices #CloudSecurity #NetworkSecurity #AWSCloud #AzureCloud #Serverless #AWSLambda #AzureDevOps #GitLabCI #GitHubActions #Linux #Unix #Bash #Python #GoLang #Java #Git #Ansible #Jenkins #NGINX #ApacheKafka #Databases #SQL #MySQL #PostgreSQL #MongoDB #Redis #DynamoDB #CloudStorage #S3 #CloudWatch #BackendInfrastructure #WebInfrastructure

  • Kubernetes
  • Terraform
  • Docker
  • DevOps
  • Google Cloud Platform
  • Amazon Web Services
  • Cloud Computing
  • Cloud Architecture
  • CI/CD
  • Microsoft Azure
  • DigitalOcean
  • HIPAA
  • SOC 2
  • Ansible
  • Python
  • Data Warehousing & ETL Software
  • Django
  • Linux System Administration
  • AWS CloudFormation
  • Git
Goran M.

Rockfield, Kentucky

$50/hr
5.0
120 jobs

System Administrator I work with virtualization, self-hosted services, storage and backups and on-premise cloud infrastructure. 🔹 Areas of Expertise: Virtualization 🔹 Proxmox HA clusters with Ceph storage for redundancy and scalability. 🔹 FreeBSD with vm-bhyve hypervisor. 🔹 XCP-ng. Networking & VPNs 🔹 Setting up and managing MikroTik and pfSense firewalls. 🔹 Configuring Wireguard and OpenVPN solutions for remote access across businesses. 🔹 GL-iNet travel routers for Digital Nomad VPN solutions. Self-Hosting & Custom Server Solutions 🔹 Managing self-hosted applications like Nextcloud, Seafile, and WordPress and others. 🔹 Configuring Nginx and Apache servers for web hosting. NAS & Storage Solutions 🔹 Setting up and managing TrueNAS, Synology, and Unraid. 🔹 Configuring ZFS-based storage solutions for redundancy and performance. 🔹 Implementing NFS, and SMB shares. Storage & Backup Strategies 🔹 Implementing Rsync, Rclone, and Syncthing for data synchronization and backups. 🔹 Managing ZFS-based storage for redundancy and backup. Remote Access & Virtual Desktop. 🔹Apache Guacamole, KasmVNC, NoMachine. Cloud 🔹 Working with AWS and Oracle Cloud. Technical Expertise: 🔹 Operating Systems: FreeBSD, Ubuntu, Debian. 🔹 Virtualization & Containers: Proxmox, vm-bhyve, XCP-ng, Docker. 🔹 Networking & Security: MikroTik, pfSense, WireGuard, OpenVPN. 🔹 NAS & Storage: TrueNAS, Synology, Unraid, ZFS, NFS, SMB. 🔹 Storage & Backups: TrueNAS, Synology, Unraid, Rsync, ZFS. 🔹 Web & Cloud Services: Nginx, Apache, AWS, Oracle Cloud.

  • WordPress
  • NGINX
  • FreeBSD
  • Debian
  • Linux
  • System Administration
  • OpenVPN
  • Ubuntu
  • Virtualization
  • VPN
  • Proxmox VE
  • Server Virtualization
  • PfSense
  • Ceph
  • Docker Compose
Igor K.

San Diego, California

$90/hr
4.9
536 jobs

Senior WordPress Developer. Reliable and responsive. Result-oriented work. On time. "Top Rated Plus" Upwork premium freelancer, member of an Upwork PRO group. 14+ years skill in full-stack web site development (prototype, graphic design, front-end, back-end, SEO). Back end experience: PHP (WordPress, Laravel), C# (ASP .NET MVC, Web API, Entity Framework, Orchard, Kooboo, Umbraco). Front end experience: HTML5 / CSS3, SASS, LESS, Bootstrap 5, Html5 animation, JS, jQuery, AJAX, Json, Rest API, Angular 1-2-4, React.js, Vue.js, Node.js, Three.js. Other experience: Windows/Unix Server administration, Git, Azure, AWS and cloud solutions. In terms of WordPress can provide: ✔️ custom theme design or theme/template modification; ✔️ responsive HTML (will pass Google mobile-friendly test, work on any device and OS); ✔️ retina display support; ✔️ HTML5 animation if needed; ✔️ WordPress/Woo back end; ✔️ WordPress multisite and membership, BuddyPress, bbPress; ✔️ custom plugin development; ✔️ 3rd-party services and payment systems API integration; ✔️ SEO, make AMP compliant, setup CDN (Cloudflare); ✔️ support; ✔️ warranty. Great experience with: ✔️ e-commerce; ✔️ payment systems integration (PP, Stripe, Authorize.net and similar); ✔️ Google Maps API (custom design, clusters, routing, radius, speed/time/distances calculation, etc.); ✔️ responsive CRM and dashboards, high-traffic web-projects; ✔️ experience with Microsoft Power BI. Keep the warranty, always available, fast response and turnaround. === TAGS === WordPress Developer ; WordPress expert ; Fullstack developer.

  • WordPress
  • WooCommerce
  • PHP
  • WordPress Plugin
  • WordPress Development
  • Elementor
  • WordPress Theme
  • WordPress Security
  • WordPress Multisite
  • WordPress Customization
  • Web Design
  • CSS
  • JavaScript
  • HTML
  • Vue.js

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