Freelancer profile translated to English.

Description

"There is no such thing as impossible" - with this credo, I have been developing software for my clients for over 10 years. Starting with guestbooks in the late 2000s to huge online shops with several 100,000 items.

Industry field of expertise

Languages

German
Native or bilingual
English
Conversational
Thai
Basic

Workplace preferences

Remote only

Primarily works remotely

DEMECAN Holding GmbH
PHP Developer
PHARMACEUTICALS INDUSTRY
January 2025 - September 2025 (8 months)
Bangkok, Thailand
For Demecan, I worked in the area of backend optimization and plugin development, focusing on internal processes in pharmacy shops:
- Extension of the order cleanup plugin with configurable payment reminders
- Maintenance and further development of the quick entry plugin for simplified
backend ordering (compatibility with current Shopware version)
- Implementation of a CSV import mechanism for the structured creation of critical
orders
- Pre-configuration of customer data (email, customer group) for
process simplification for pharmacy locations such as Collini and Vitahris
Shopware 6 Symfony MySQL PHP8
MERCEDES-BENZ AG
PHP Developer
AUTOMOBILE
July 2024 - December 2024 (5 months)
Bangkok, Thailand
As part of the project for Mercedes-Benz AG, I was responsible for optimizing the
Shopware 6 checkout process and address validation:
- Introduction of a mandatory house number field in checkout including
validation and merge logic for correct transfer to logistics providers
- Ensuring deliverability
- Improvement of user guidance for incorrect entries in checkout (inline
validation instead of returning to the registration page)
Shopware MySQL PHP8 Symfony REST
EVOC SPORTS GMBH
PHP Developer
FASHION AND COSMETICS
April 2024 - September 2025 (1 year and 5 months)
Bangkok, Thailand
1. Security and System Hardening:
I was responsible for analyzing and fixing critical security vulnerabilities in
Shopware Core and third-party libraries. XXE, SQL
injection, and XSS vulnerabilities in packages such as league/oauth2-server,
phpspreadsheet, and tcpdf were identified and secured through targeted updates and plugin
extensions.
2. B2B-specific Checkout and Logic Adjustments:
Several individual adjustments were made for the B2B shop, including:
- Deactivation of address change buttons to prevent inconsistencies with
the Business Central integration
- Integration and error correction for pseudo-products for special
shipping cost regulations
- Implementation of custom badges such as "Preorder" and a custom closeout
service logic for displaying delivery status and backorders
3. Optimization of Frontend Display and Usability:
- Fixing errors in image display on product and cross-selling pages
- Removal of outdated texts after plugin deactivation (e.g., for reviews)
- Template adjustments for displaying product dimensions, even if individual
values are missing
- Implementation of an additional content block (WYSIWYG) directly below the
product description
4. Improvement of User Experience and Functionality in the B2C Shop:
- Error analysis and correction for account assignment of B2C customers who
were incorrectly shown B2B dashboards
- Extension of the voucher function with legally compliant additional texts for
single-purpose vouchers
- Introduction of strict password rules including frontend validation and email
notification upon password change
5. Performance and Database Optimizations:
- Analysis of loading times on product pages with many variants and optimization of
DBAL/EntityHydration
- Introduction of lazy loading for media components (video/image) to improve
performance on mobile devices
PHP8 Shopware 6 Symfony MySQL Back-End-Entwicklung