Patrick ScharfBackend & EDI Engineering

Case Examples

Project work across backend, EDI, and logistics IT

Concrete roles, technologies, and decisions—without confidential operational data or unsupported outcome claims.

Selected Projects

Modernizing a Live Tour Management System

Maintenance and incremental modernization of a PHP/MySQL tour management system that has been in production for more than 20 years at REBER Logistik.

RoleApplication developer since January 2026, working in a three-person development team across production backend and integration paths.

WorkBackend development, database design, session authentication, per-company configuration, and root-cause analysis on live systems.

Operating contextThe system handles live logistics data across multiple locations and device types, so changes must preserve day-to-day operations.

ContextThe case demonstrates evidence-based modernization without exposing internal metrics or confidential system details.

Technical Details

PHPMySQLDockerSession AuthLogistics IT

Small, traceable changes to a business-critical system, with explicit focus on production stability and structured root-cause analysis.

EDI and REST Integration via Lobster Data

Connecting internal logistics workflows to an external carrier platform through EDI protocols and REST APIs.

ProtocolsHands-on work with EDIFACT, AS2, SFTP, and OFTP alongside REST-based platform integration.

ImplementationData transformation, JSON payload mapping, and interface debugging in the Lobster Data Platform.

ResponsibilityProduction-oriented analysis and evolution of integration paths between tour management and external systems.

ContextThe public case covers technical patterns and responsibilities, never internal payloads or operational metrics.

Technical Details

Lobster DataEDIFACTAS2SFTPOFTPREST APIJSON

Explicit mapping and validation in middleware keeps the legacy core focused while making failures traceable across system boundaries.

Signalwerk: SaaS for Social Lead Monitoring

An independent SaaS product currently in development for social lead monitoring across German-language communities.

Product ideaCapture relevant signals from German-language communities and prepare them for traceable lead workflows.

Technical approachBuilt with Laravel 11, Livewire, and Tailwind as a server-centric application with explicit UI and backend boundaries.

StatusActive personal development; no user counts, revenue, or productivity impact is claimed.

ContextSignalwerk demonstrates the transfer of production PHP experience into an independently designed modern Laravel product.

Technical Details

Laravel 11LivewireTailwind CSSPHP

Incremental product development with separated domains, server-side state management, and a reactive UI without unnecessary frontend complexity.

Additional Project Experience

Real-Time GPS Tracking with Leaflet.js

2026 - ongoing

Cross-location map view for multiple device types in a live logistics environment.

Docker and Traefik Infrastructure

2026 - ongoing

Containerized server services, reverse-proxy routing, and root-cause analysis in production environments.

Active Directory Security Assessment

2026

Security audits with BloodHound followed by hardening of identified attack and permission paths.

Application Development at Staffinity Technologies

September 2024 - March 2025

Seven-month internship covering professional development workflows, codebase navigation, and structured software delivery.

Employer and role are stated transparently. Internal payloads, endpoints, operational metrics, and security-sensitive details remain confidential.

Assessing my profile for a backend, EDI, or integration role?Get in touch or request my CV