Modern Frontend Development
I turn graphic designs into lightning-fast websites. I use modern frameworks, prioritizing Core Web Vitals and perfect accessibility across devices.
Custom Block & FSE Themes
I create sustainable, custom WordPress themes with a focus on Block themes. I code bespoke Gutenberg blocks for easy content management with FSE support.
API Integration & AI Automation
I develop robust plugins and connect websites with external systems (ERP, CRM). I implement REST APIs and integrate AI tools to automate your processes.
Performance, Security, DevSecOps
I ensure top-tier security and extremely fast loading times. I deploy websites using CI/CD pipelines and guarantee long-term, flawless application running.
Skills
Study & Work Experience
2017 - now
Senior WordPress Developer @ freelance
Architecture and development of complex websites. Creating Block themes, coding custom plugins, API/AI integration, and long-term tech maintenance.
2015 - 2017
Web Designer @ freelance
Website design, icons, and illustrations. External cooperation with digital agencies.
2010 - 2016
Management @ University of Economics, Prague
Bachelor's degree + master's degree specializing in information management.
Professional goals
My goal is to connect cutting-edge design with advanced technologies and create long-term stable websites that fully automate your business.
Over 12 years of experience, I transitioned from graphic design to developing complex apps, giving me a strong feel for UX and eye for detail.
Today, I focus mainly on technical architecture – from custom Gutenberg blocks through complex API integrations to involving AI. In my work, I value clean code and the technological sustainability of the entire solution.
I serve as a reliable tech partner for ambitious companies, helping them realize complex web solutions. I gladly manage the launched websites afterward to ensure their peak performance, top security, and continuous smooth development.
I have worked externally with
What clients say
Jakub Sedlák @ Bookport
I like working with Jan; he's a specialist in his field. It is easy to agree with him very quickly. He does not wait and can search for and propose solutions. He is precise, creative, and fast. He has a flair for detail, graphics, and coding.
Petr Žemlička @ Nupreme
Perfect service, quick and easy solution, patient approach. We mainly solved the redesign of the e-shop, a more straightforward administration interface, and its smoother operation. Jan solved everything to our great satisfaction. We can only recommend working with him.
Martin Lipert @ Team Library
Jan pleased me the most with the combination of strict adherence to deadlines and very high-quality taste. I was looking for graphics for an e-shop, with which he had no experience so far, but this didn't stop things, and everything was styled with materials for the coder in 14 days, and that's an absolute record for the e-shop on the green field.
Vojtěch Váňa @ Digital Project Manager
I consider Jan to be a competent specialist. Whenever we agreed on a contract, he fulfilled it carefully. I appreciate his attention to detail and contribution beyond the entrusted project.
Mirko Hüttner @ VioCRM
Cooperation with Mr. Pěnčík has always been on a professional level. Therefore, I could always count on meeting the deadline and seamless communication.
Josef Bištiak @ Front End Developer
I haven't received such well-prepared graphics in a long time. It is then a pleasure to work.