About Me
I'm a full stack developer and systems engineer with experience spanning web development, Linux and Windows administration, DevOps, networking, automation, database design, and industrial CNC software integration.
I enjoy solving difficult technical problems that cross traditional job boundaries. Whether it's writing PHP, troubleshooting DNS, building Docker infrastructure, automating business workflows with PowerShell, optimizing SQL queries, or integrating decades-old software with modern web technologies, I build practical solutions that last.
Core Skills
Languages
- PHP
- JavaScript (Vanilla/ES6+)
- HTML5 & CSS3
- SQL
- PowerShell
- Python
- Bash
- C# / VB.NET
Backend & Data
- REST APIs & WebSockets
- MariaDB / MySQL
- WordPress / WooCommerce
- Legacy PHP Modernization
- Authentication Systems
- Payment Integration
Infrastructure
- Linux & Windows Administration
- Docker & Containerization
- Cloudflare & DNS
- Email Deliverability (SPF/DKIM/DMARC)
- Networking
- SSL / TLS Management
Automation
- PowerShell & Shell Scripting
- Build Automation
- Deployment Pipelines
- Business Workflow Automation
- Active Directory / LDAP / Samba
- System Integration
Professional Experience
Lead Full Stack Developer & DevOps Integrator
Responsible for developing and maintaining modern web applications, e-commerce systems, infrastructure, and internal tooling while supporting heavy industrial CNC software and hardware products.
- Designed and maintained a high-volume WooCommerce storefront, including deep source code modifications to optimize checkout flows and pricing logic.
- Architected and built an automated software licensing pipeline that validates system data and delivers digital licenses to customers within minutes.
- Engineered modern, responsive UI layers for legacy hardware utilizing WebView2, Vanilla JavaScript, and WebSockets.
- Managed Linux servers, Docker containers, DNS, SSL, and email infrastructure.
- Optimized legacy SQL databases, converted deprecated APIs, and successfully extended the lifespan of 30-year-old codebases.
- Overhauled legacy server security infrastructure by implementing Cloudflare, SPF, DKIM, DMARC, and more.
- Developed specialized internal automation tools using PHP, PowerShell, and Python to bridge disparate operational teams.
Selected Projects
Automated License Pipeline
Built an automated e-commerce pipeline that processes orders, validates system data, and delivers software licenses to customers within minutes, eliminating 90% of manual fulfillment overhead.
Industrial Hardware UI
Developed a responsive 1920x1080 touchscreen interface for CNC hardware using WebView2, Vanilla JavaScript, and WebSockets, successfully bridging modern web standards with industrial control systems.
E-Commerce & Core Logic
Maintained a high-volume WooCommerce platform, including modifying core source code to optimize reseller checkout logic and managing advanced pricing and shipping algorithms.
Infrastructure Modernization
Migrated critical legacy services to Docker environments, dramatically improving reliability and streamlining deployments while reducing systemic maintenance overhead and SaaS expenses.
Legacy System Refactoring
Modernized decades-old PHP applications and legacy math libraries by improving security protocols, converting deprecated database APIs, and establishing modern deployment practices.
Technical Interests
- Self-hosting and homelab infrastructure (Nextcloud, Portainer, Prosody)
- Linux and open-source software
- DevOps and pipeline automation
- High-performance, low-overhead native applications
- Retro computing and digital archiving
Philosophy
Good software should solve real problems, be maintainable, perform well, and remain understandable years after it's written. I value practical engineering over unnecessary complexity, automation over repetition, and reliability over trends.
Contact
Interested in working together, discussing a project, or talking about systems architecture, DevOps, or full stack development?
LinkedIn: HolesJ