Technical Focus
A skill profile grounded in practice
Professional experience, current personal development, and certifications are kept distinct and easy to verify.
Verified core stack
PHPLaravelMySQLLobster Data PlatformREST APIsDockerTraefikLinux
PHP and MySQL backend engineering
Maintaining and evolving a business-critical tour management system that has been in production for more than 20 years.
- Backend logic, database design, and query work.
- Session authentication and per-company configuration.
- Root-cause analysis and controlled changes in live operations.
EDI and Lobster Data
Integrating internal logistics workflows and external platforms through the Lobster Data Platform.
- EDIFACT, AS2, SFTP, and OFTP.
- Transformations, profile chains, list mappings, and subprofiles.
- Failure analysis across production interface paths.
REST APIs and data mapping
REST integrations with explicit data contracts, validated payloads, and traceable failure handling.
- JSON mapping between tour management and carrier platforms.
- Structure, required-field, and plausibility validation.
- Separation of transport, validation, and process failures.
Production-safe modernization
Improving established software step by step without putting critical workflows at risk through a disruptive rewrite.
- Small, reviewable increments with rollback options.
- Prioritization by operational risk and concrete value.
- Documented architecture and operations decisions.
Docker, Traefik, and Linux
Supporting containerized services and production server infrastructure.
- Container runtime environments and reverse-proxy routing.
- TLS, controlled access paths, and operational troubleshooting.
- Structured root-cause analysis across servers and terminal systems.
Security and Active Directory
Assessing Active Directory environments and translating attack-path findings into practical hardening work.
- BloodHound-based analysis of permission and attack paths.
- Hardening identified weaknesses in an operational context.
- HTB Certified Penetration Testing Specialist (CPTS).
Lobster Data Hero Specialist - Lists & Maps
Issued September 2026
Lobster Data Hero Specialist - Profilketten & Subprofile
Issued September 2026
Lobster Data Hero Scout
Issued September 2026
Lobster Data Hero Starter
Issued March 2026
Hack The Box Certified Penetration Testing Specialist (HTB CPTS)
Issued December 2024
Current personal product
Signalwerk with Laravel 11, Livewire, and Tailwind
A SaaS product for social lead monitoring in German-language communities. Its status is clearly presented as active development; no unverified usage or outcome metrics are claimed.