Custom themes and targeted theme adjustments for Shopware 6, implemented cleanly and with performance in mind.
Shopware Theme Development & Theme Customization
Custom themes and targeted adjustments
A well-built theme directly affects performance, usability, and conversion. I support Shopware merchants with professional theme development, customization, and optimization, technically clean, without core hacks, and built for long-term maintainability.
Shopware 6: Custom Themes & Extensions
For Shopware 6, I develop complete custom themes, adapt existing themes, or extend them both visually and functionally.
Services at a glance
- development of fully custom Shopware 6 themes
- customization and extension of existing themes
- performance optimization with a focus on loading times, CLS, and clean asset handling
- clean implementation using Twig, SCSS, and JavaScript
- update-safe architecture without unnecessary dependencies
Suitable for:
- new Shopware 6 projects
- relaunches and redesigns
- shops with performance or usability issues
- custom requirements beyond standard themes
Shopware 5: Theme Customization & Optimization
I do not create new themes for Shopware 5, as the system is end-of-life. However, I continue to provide targeted adjustments to existing themes to keep shops running smoothly or to implement sensible optimizations.
Typical tasks
- customization of existing templates and styles
- minor design corrections
- bug fixes and clean refactoring
- preparation for a future migration to Shopware 6
Focus: reasonable improvements without unnecessary investment.
Performance Is Always a Priority
Regardless of the system, all theme work is implemented with performance in mind.
Typical measures include:
- reducing unnecessary assets
- clean and maintainable template structure
- avoiding overengineering
- strong focus on loading speed, Core Web Vitals, and maintainability
How a Theme Project Works
- Short analysis of the current shop or design
- Clear recommendation on what makes sense and what does not
- Implementation in clearly defined steps
- Review, fine-tuning, and clean handover
Transparent, structured, and without surprises.
Request a Consultation
Planning a new Shopware 6 theme or need targeted adjustments to an existing shop?
How I work
Three principles that apply in every project
Understand before building
First the short technical assessment: what is the actual problem, where is the lever, what makes economic sense? Then the implementation.
Build instead of forwarding
You talk to the developer who does the work – no handover chain, no black box, clear status updates and early warning about risks.
Hand over instead of holding on
Code in your repository, tests, documentation and a deployment process your team understands. No vendor lock-in – your system does not depend on me afterwards.
Background
Experience at a glance
- Today
- Senior freelancer in ongoing Shopware projects of several agencies and merchants – at home in foreign repos, processes and deadlines.
- Since 2021
- Self-employed as Stefan Pilz Ltd. – remote for merchants and agencies: Shopware 5 and 6, Symfony, migrations, maintenance.
- 2015 – 2021
- E-commerce backends: inventory, PIM and Amazon/eBay integrations for around 3.5 million products, then the Drillisch mobile-carrier web stores.
- Since 2012
- Full-time web developer – first at an agency: websites and stores with Joomla, xt-Commerce and Shopware.
- 2002
- Completed vocational training as a software developer (C/C++). First own PHP websites from 2004.
See current and completed projects Career and stack in the CV
Good fit
Works well when...
- you have an existing Shopware system with a concrete technical issue.
- you need direct PHP/Symfony support without agency overhead.
- you expect clear analysis, clean implementation and traceable handover.