Freelancer profile translated to English.
Back to original languageAbout Stefan
I develop productive web applications and B2B platforms with PHP and Laravel – not prototypes, but systems that run live in daily operation.
Focus areas:
• B2B platforms & marketplaces (ordering processes, user management, delivery logic)
• Payment & accounting integrations (Mollie, Lexoffice, prepayment/invoice flows)
• Process automation with n8n (webhooks, lead distribution, API integrations)
• Data processing: CSV pipelines, migrations, normalization, deduplication
• Shop integrations (WooCommerce) and interfaces to third-party systems
I work cleanly: backups before changes, syntax checks, traceable deployments via SSH on production servers. I use AI-assisted tools to deliver quickly – I check and am responsible for the result myself.
If you are looking for someone who understands and solves a concrete problem instead of just billing hours, we are a good fit.
German
Native or bilingual
English
Conversational
Remote only
Primarily works remotely
Experience
- Experten-PlaceOwner & DeveloperJanuary 2023 - Today (3 years and 6 months)Babenhausen, HE, GermanyDevelopment and operation of several digital platforms for lead generation, energy, digitalization, and sales networks. Responsible for architecture, development, operation, and customer support.• • B2B Lead Marketplace (Laravel 11): Complete platform with order flow, payment integration, mapping engine for automated lead distribution to partner systems, webhook security, and rate limiting.• • Multi-brand web portals: Live systems for lead brokerage in the areas of photovoltaics, heat pumps, insurance, stairlifts – including Aroundhome/DAA integration.• • Process Automation (n8n): Lead input → validation → distribution to multiple downstream systems via webhooks and API mappings.• • Data Migration & Preparation: Transferring CRM exports into partner import formats –Phone normalization, postal code correction, deduplication of large contact lists.• • System Sale: Developed an installer onboarding portal as a neutralized white-label product and sold it to a third-party GmbH (€5,490 net).• • Accounting Integration: Lexoffice API for invoice creation, PDF dispatch, and payment reconciliation via cron polling.
Recommendations
Be the first to recommend Stefan
Help this freelancer shine by sharing your experience working together.
These freelancer profiles also match your criteria
Agatha Frydrych
Backend Java Software Engineer
4.7
(3)
2
Baptiste Duhen
Fullstack developer
4.6
(4)
5
Amed Hamou
Senior Lead Developer
4
(2)
7
Audrey Champion
Web developer
4.3
(3)
4