I've been building on Linux since 1994.
Worked solely on Odesk/Upwork since April 2009.
Linux/UNIX Engineer & Independent Consultant
April 2009 – Present
Provide high-end cloud architecture, server tuning, critical-incident recovery, and modern data engineering services to global clients. Completed 140+ engagements on Upwork with a perfect 5.0/5.0 feedback rating.
AI Data Pipeline & Serverless Warehousing (2025 – 2026):
Engineered a serverless data catalog pipeline using Python (BeautifulSoup, requests) to automatically scrape, parse, and clean investigative articles from target web sources [1].
Structured the raw extracted payload into optimized Apache Parquet tables and deployed them directly to Hugging Face Datasets for serverless hosting [1].
Built an interactive search and query dashboard in Gradio, utilizing custom DNS records (ALIAS/CNAME) to map and serve the app securely on DigitalOcean's cloud.
Cloud Infrastructure & Migrations (AWS EC2 / VPS):
Architected and built high-availability Linux cloud servers on AWS EC2, configured with WHM/cPanel, Concrete5 CMS, and optimized PHP environments.
Successfully migrated legacy physical dedicated servers to scalable Virtual Private Servers (VPS) with CentOS/RHEL.
Critical System Recovery & Administration:
Diagnosed and resolved emergency service outages, including JBOSS server crash failures, Plesk/cPanel software conflicts on legacy CentOS nodes, and data recovery via mounting RAID arrays on FreeBSD.
Configured Snort IDS, hardened server network boundaries, and conducted end-to-end performance audits.
UNIX Engineer | E Solutions Corporation
March 2008 – April 2009 (1 year 2 months)
Supported physical operations and infrastructure for a Tier-1 collocation facility.
Administered and engineered OpenBSD, FreeBSD, Linux, and Windows server environments daily.
Identified and successfully resolved a high volume of network and host-based security vulnerabilities.
Stabilized the physical bandwidth billing system for accuracy and provided system-level engineering support to the web development team.
UNIX System Engineer | Hilton Grand Vacations (HGVC)
November 2006 – March 2008 (1 year 5 months)
Served as the single onsite point of operations for all HP-UX, Solaris, FreeBSD, macOS X, and Linux servers.
Enterprise Data Warehouse (EDW) Architecture:
Designed and built a custom corporate Data Warehouse using RedHat Enterprise Linux, IBM Information Server, and the Sun N1 toolkit.
Backported RedHat clustering utilities and GFS modules specifically for RHEL 4 to support database stability.
Tailored operating systems to run the IBM Information Server 8 product family, including IBM DB2 V9.3, WebSphere 6.0, DataStage, and QualityStage.
Web Presence Engineering:
Designed and deployed the company's external web servers on the Solaris 10 platform using Sun T2000 hardware.
Leveraged Solaris Zones, hardware RAID, and the ZFS filesystem to isolate and optimize traffic.
Authored custom system automation utilities in Perl, C, and the Bourne shell to debug complex kernel and network issues.
UNIX Administrator | Vortech, Inc.
2004 – 2006 (2 years)
UNIX Administration & Support | Magna Computer Corp
September 2003 – May 2004 (9 months)
UNIX System Administrator & Network Engineer | Independent Consultant
November 2001 – July 2003
Implemented OpenBSD, Linux, and Windows servers in high-density colocation centers.
Configured custom web application servers from scratch using Apache, Perl, PHP, and MySQL.
Programmed terminal-based console utilities in C and ncurses, utilizing the GTK toolkit and X11 API.
Second Level Support | Jobwarehouse
May 2001 – September 2001 (5 months)
Provided secondary engineering support for primary web servers and high-volume data processing tasks.
Education
Valencia Community College | 1996 – 1998 | Computer Science & Systems Study
Winter Park High School | 1992 – 1996 | Gifted Academic Program
Professional 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 keeps on track of the project. He would make a good supervisor in any company."
— Shelton R., Sr. IT Consultant / DB2 DBA Expert, Xtivia (worked directly with Aaron at HGVC)
CentOS
System Administration
Apache HTTP Server
System Monitoring
Linux
Amazon EC2
Snort
FreeBSD
Unix Shell
Iptables
Network Security
OpenBSD
Virtualization
Linux System Administration
MySQL
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
Kevin C.
Lake Mary, Florida
$120/hr
5.0
6 jobs
I am a senior full stack developer with 20 years of web application development experience and have been developing software for 29 years.
- PHP 20+ years
- Symfony framework 13+ years
- Laravel, cakePHP, Codeigniter experience
- Wordpress
- API development 11+ years
- Javascript 20+ years
- AngularJS 11+ years
- Angular 2+ years
- Docker
- AWS
I have worked for a variety of places ranging from small start-ups to large corporations, this gives me a lot of insight as to what has worked well and not so well.
I am a great communicator on projects and I take pride in my work. I go above and beyond to deliver quality results.
Thanks for considering me for your project.
PHP
Symfony
HTML5
AngularJS
jQuery
Amazon Web Services
JavaScript
Twig
API Integration
API Development
Angular
MySQL Programming
Doctrine ORM
Authorize.Net
OKTA
Michael R.
Fort Myers, Florida
$195/hr
4.5
19 jobs
19 year industry veteran
Highlights:
- Built fitness tech application (alone) to $350 million acquisition supporting over 600,000 customers with 10,000 concurrent and $5 million in monthly transactions.
- BA Visual Arts
- Built 3 development teams, 2 through Fortune 500 acquisition.
- CNBC Power Lunch & Fox Business News Tech Take correspondent.
Skills:
Specialization in emergency response debugging, DevOps, AWS network infrastructure, nosql and relational databases, email, a
Soc1, soc2, pci-dss, 21 cfr 11 (fda digital records), and programming languages.
Languages: PHP, Python, TypeScript, Pinescript, Ruby on Rails, HTML 5, CSS3, RSS, JavaScript (Angular, ReactJS, NodeJs, Prototype, JQuery), .NET, Bash, CMD.
Frameworks: Laravel, WordPress, Drupal, Typo3, Joomla, Oscommerce, Magento, Shopify, Django, Flask, ReactNative
Stacks: LAMP, LEMP (nginx), WAMP, WIMP (IIS), XAMPP.
Servers: Windows, Debian and RPM based linux distros (CentOS, RedHat, Ubuntu, Debian), SMTP and Exchange mail servers.
Networking: AWS solutions architect (all things under a VPC and more).
DevOps: Ansible, Jenkins, Gulp/Grant, Github, Gitlab, Bitbucket, JIRA.
Databases: MySQL, PostgreSQL, MsSQL, MariaDB, MongoDB, ElasticSearch, DynamoDb
API's: All things RESTful both OAuth 1 and 2.
PHP
WordPress
Node.js
Magento
Laravel
JavaScript
RESTful Architecture
SQL
Microsoft Azure
Amazon EC2
MySQL Programming
SOC 1
Linux System Administration
SOC 2
Oleg K.
Sunny Isles Beach, Florida
$90/hr
5.0
330 jobs
Top Rated Upwork premium freelancer, member of an Upwork PRO group.
12+ years of skill in full-stack website development (prototype, graphic design, front-end, back-end, SEO experience).
11+ years of solid commercial experience with WordPress and WooCommerce.
5+ years of experience with Laravel.
WORKING WITH ME YOU WILL GET:
▪ custom creative professionally looking graphic 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; (experience with RTL sites);
▪ WordPress multisite and membership; Buddypress and bbPress setup;
▪ custom plugin development;
▪ 3rd-party services and payment systems API integration;
▪ SEO, make AMP compliant, ADA compliant, CDN (CloudFlare setup);
▪ support;
▪ warranty.
Front-end experience: HTML5 / CSS3, LESS, HTML5 animation, JS, jQuery, AJAX, JSON, Bootstrap, Angular 1-2-4, React, Vue.js.
Experience with Unix Server administration, Apache, Redis, nginx; Git, AWS, and cloud solutions.
You can always reach me via slack, email, or phone.
Tags: ACF, Avada, Custom plugin, Custom theme, Divi, Elementor, PHP, Web Developer, WordPress designer, WordPress Developer, WordPress Website Development.
WordPress
WooCommerce
PHP
WordPress Plugin
WordPress Development
Elementor
Divi
WordPress Theme
BuddyPress
WordPress Multisite
WordPress Customization
Web Design
CSS
JavaScript
HTML
Graphic Design
Avada Theme Customization
PSD to WordPress
Mark D.
Clearwater, Florida
$75/hr
4.9
19 jobs
Full-time Drupal development since 2005. 20+ years enterprise experience across Drupal 5-11.
Over 100 successful deployments spanning diverse industries and organizational scales.
Core Platform Expertise
Complete mastery of Drupal architecture evolution: hook systems, Entity API, Field API, Plugin system, Symfony integration, Configuration Management, Twig templating, and render pipeline. Expert knowledge of services, dependency injection, routing, and access control. Proficient with Drush, Composer, and Drupal Console.
Local development using DDEV and Docker, and multi-developer orchestrations.
Migration & Upgrades
Specialized in Drupal 7→10, 8→10, and 9→10 migrations. Expert with migration framework including source, process, and destination plugins. WordPress-to-Drupal conversions. Custom database migrations, content modeling, URL mapping, and SEO preservation strategies.
Full-Stack Drupal Development
Backend:
Custom module development,
REST API,
JSON:API,
service development, batch/queue processing, Form API, AJAX framework.
Frontend: Twig templating, custom theming, Sass/CSS3, responsive design, JavaScript/jQuery, ES6+, accessibility (WCAG 2.1 AA), cross-browser compatibility, component-based architecture.
Special expertise in Public Sector requirements including USWDS, One Way Systems, and security protocols.
Commerce & E-Commerce
Drupal Commerce 2.x expertise including product management, order workflows, checkout customization. Payment gateway integration: Stripe, Square, Authnet
Pricing, promotions, shipping calculation, tax integration (TaxJar, Avalara). PCI compliance and secure payment handling.
Custom product features such as custom calculators, product customizer overlays, Fabric.js, React, etc.
CiviCRM Development
Complete Drupal and CiviCRM integration including contact management, membership systems, event registration, contribution pages, CiviMail campaigns, and API development. Donor management, fundraising campaigns, and member portals.
Domain Access
Proficiency in multi-site installations and domain based management including theme switching concepts and prefixed tables. Performance scaling and marketplace concepts.
Social Media Integrations
Remote orchestrations, custom app development for custom logins and display apps.
Performance & Infrastructure
Optimization: Page/render caching, Varnish, Redis, Memcached, CDN integration (Cloudflare, Fastly), database tuning, query optimization, asset aggregation, Core Web Vitals.
Server Admin: Linux (Ubuntu/CentOS), Apache/Nginx configuration, PHP-FPM tuning, MySQL/MariaDB administration, SSL/TLS, security hardening, backup strategies.
Hosting: Pantheon, Acquia, Platform.sh, AWS, custom infrastructure, high-availability configurations, load balancing.
SEO & Digital Marketing
Technical SEO, XML sitemaps, structured data (JSON-LD, Schema), answer engine optimization, Core Web Vitals, Google Analytics 4, Tag Manager, Search Console integration. Metatag, Pathauto, redirect management.
API & Integrations
REST API development, JSON:API, GraphQL, OAuth authentication, webhook handling, external API consumption, Guzzle HTTP client, real-time data synchronization.
AI & Automation
Claude API integration, AI workflow automation, prompt engineering, intelligent content processing, natural language applications, automation orchestration.
Development Practices
Git workflows, Claude Code, CI/CD pipelines (Jenkins, GitLab CI, GitHub Actions), Docker/DDEV/Lando, PHPUnit testing, coding standards (PHPCS), Xdebug profiling, documentation.
Additional Competencies
Media Management Systems -
Content Moderation Workflows - Drupal, Wordpress, Shopify
Project Management - Team Orchestrations and Systems Development
Technical Training - Custom Seminars and Training Systems
Camtasia Video Production - Production Video - AI Integration
Custom Explainer Videos - DOODLY and VOOMLY
Make Orchestrations and Scenarios - Custom Workflows and Claude API Integrations
Zoho apps - Certified ZOHO Development
Shopify development - Graphql. Custom LIQUID, Theme Customizations, Advanced Webhooks and API Implementation - AI, REST, JSON
Zapier configurations - Advanced Implementations
NGINX
Drupal
WordPress
Search Engine Optimization
Ecommerce Website Development
Copywriting
Linux System Administration
Front-End Development
Content Management
CiviCRM
Data Migration
Hosting Setup
Server Administration
Project Planning
Project Management
AI Consulting
AI Implementation
AI Model Development
AI Model Integration
AI Agent Development
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