Web platform engineering, backend performance and Linux infrastructure
I have been building, maintaining and stabilizing web platforms since 2015. My work focuses on PHP, WordPress, WooCommerce, Craft CMS, backend optimization, Linux infrastructure and performance issues that appear after a project starts growing in production.
This portfolio is not a collection of generic agency promises. It documents real work on websites, stores, plugins, cache layers, integrations, server environments and open-source tools. I prefer reducing complexity over adding another plugin or another heavy layer that makes the system harder to maintain.
My workflow combines PHP refactoring, custom WordPress extensions, Craft CMS development, Debian server administration, Varnish Cache, Cloudflare CDN, Bash automation and practical debugging. I also work with Android-related tooling, device recovery workflows and lower-level system projects when the problem goes beyond a standard web stack.
Projects connected with CoolTRONIC.pl, FRP Unlocking and potacki.com show the same approach in practice: improve stability, reduce technical debt, make performance measurable and keep the system maintainable after deployment.
Selected Projects and Tools
I enjoy projects where technology solves a specific problem. Sometimes that means improving an online store, sometimes building a Craft CMS plugin and sometimes working on an Android-related diagnostic utility.
The case studies below explain the problem, the approach and the technical decisions behind each project.
Varnish Cache for ISPConfig 3 with Nginx SSL Termination
Varnish Cache integration with ISPConfig 3, Nginx SSL and Apache for WordPress and Craft CMS, with purging, Cloudflare and Brotli support.
WordPress and DevOps Projects for US Clients
WordPress, WooCommerce and DevOps work for US clients: development, migrations, performance tuning and external integrations.
CDN Cache & Preload in Craft CMS
Craft CMS plugin for automated cache purging and warming with Varnish, Cloudflare, sitemap processing, URL exclusions and queued jobs.
PrestaShop Store with a Vue.js Product Form
PrestaShop store for strength-equipment manufacturer Steelstorm with a Vue.js product-variant form, filters and a custom preloader.
Craft CMS PDF Generator Plugin
Craft CMS plugin for generating PDFs from Twig templates, HTML and URLs, with Assets integration, caching, QR codes, watermarks and PDF/A or PDF/X support.
Master's Degree at Military University of Technology
Electronics and Telecommunications, part-time
Planned completion: 2027
CoolTRONIC.pl
Founder and Lead Engineer
April 2019 - now
At CoolTRONIC.pl, I work on web platforms, server environments and technical tools. My work combines websites and online stores with Linux administration, performance improvements and automation.
- building and maintaining websites and web services for clients,
- administering environments based on Debian, Proxmox and ISPConfig,
- working on caching, server configuration, deployments and production stability,
- developing Craft CMS plugins available on GitHub and in the Craft Plugin Store,
- maintaining open-source Android-related projects and device-recovery tools.
FRP Unlocking and Android Projects
since 2022
Open-source tools and diagnostics
I develop tools related to Android diagnostics, device recovery and lower-level system work. These projects are intended for owned devices or hardware the user is authorized to work with.
- ADB automation and log analysis,
- tools supporting bootloader-related workflows,
- Linux kernel work for selected Qualcomm-based devices,
- technical documentation and public GitHub repositories.
BiViSee Sp. z o.o. / BluePigMedia LLC
Software Engineer
October 2021 – June 2023
I worked on web platforms for US clients, including projects connected with mental health and addiction treatment.
- developing and maintaining web solutions used in production,
- debugging issues affecting system stability and performance,
- working on server configuration and Core Web Vitals,
- supporting technical decisions during periods of active product development.
BiViSee Sp. z o.o. / BluePigMedia LLC
October 2021 – June 2023
WordPress Specialist / DevOps Engineer
I worked on web platforms for US clients, including projects connected with mental health and addiction treatment:
- developing and maintaining web solutions used in production,
- debugging issues affecting system stability and performance,
- working on server configuration and Core Web Vitals,
- supporting technical decisions during periods of active product development.
Military University of Technology in Warsaw
Electronics and Telecommunications, ICT Systems
October 2019 – June 2022
The degree helped me connect my earlier web-development experience with a broader understanding of electronics, networks and ICT systems.
From Web Development to the System Layer
I have worked on websites, online stores and web tools since 2015. Over time, PHP, WordPress and Craft CMS were joined by Linux servers, performance work, DevOps and Android-related open-source projects.
View My Career Path
CoolTRONIC.pl
Founder and Lead Engineer
April 2019 - now
At CoolTRONIC.pl, I work on web platforms, Linux server environments and technical tools. My work combines websites and online stores with performance improvements, automation and production maintenance.
- building and maintaining web services for clients,
- administering environments based on Debian, Proxmox and ISPConfig,
- working on caching, server configuration and deployment reliability,
- developing Craft CMS plugins available on GitHub and in the Craft Plugin Store,
- maintaining Android-related open-source tools and device-recovery projects.
Military University of Technology in Warsaw
Electronics and Telecommunications, ICT Systems
October 2019 – June 2022
The degree helped me connect my earlier web-development experience with a broader understanding of electronics, networks and ICT systems.
A Few Things I Have Learned Along the Way
💠 I've been programming for over 11 Years . I started with websites, PHP, and JavaScript. Over time, I've added online stores, Craft CMS, WordPress, Linux servers, and DevOps.
💠 I enjoy projects that require me to delve deeper than just the website's appearance. Sometimes the problem lies in the code, sometimes in the database, cache, integration, or server configuration.
💠 After hours, I also develop open-source projects related to Craft CMS and Android. It's from these projects that I gain the most practical knowledge.
Notes from the Workbench
I write about projects, debugging, performance work and the occasional technical rabbit hole. Some posts are practical guides. Others are notes from problems that took longer to solve than expected.
Varnish Cache for ISPConfig 3: Nginx SSL, Apache, and Faster Websites
Why Another Plugin Won’t Fix a Slow Website: Varnish Cache for ISPConfig 3 with Nginx SSL and Apache A slow website does not always need another optimisation plugin. Sometimes the actual problem lies deeper: in the server configuration, the caching layer, or the way traffic flows between Nginx, Apache, and the application. In one of […]
Craft CMS Plugin Updates: PDF Generator, CDN Cache Preload
A summary of updates to two Craft CMS plugins: PDF Generator and CDN Cache & Preload. Document generation, caching, preloading and integration with Cloudflare and Varnish.
How CoolTRONIC.pl Evolved from a Blog into a Company
CoolTRONIC.pl started as a technical blog and gradually became a company and a technical base for websites, Linux servers and open-source tools.
Engineering Thesis Defense at MUT
In June 2022, I defended my engineering thesis at the Military University of Technology. The project focused on smart-home system design using Home Assistant.