Henri
From: Germany
Location: Hulskie, PL
On Useme since 20 April 2025
Deals 2
SUCCESSFUL: 2
DISPUTED: 0
FAILED: 0
About me
Senior Python backend developer with 20+ years experience. Specialization: backend systems, RESTful APIs, web applications.
Open Source Maintainer:
- Morepath - Python framework with extensions (JWT, PonyORM, validation)
- Django Mezzanine CMS & Cartridge e-commerce
- Overmind - TypeScript/React state management
Skills:
Backend: Python (Morepath, Flask, Django), Node.js, GraphQL, PostgreSQL, PonyORM, type hints
Infrastructure: 25+ years Linux/Debian, GitHub Actions, Nginx, automated deployment
Full-Stack: TypeScript, React, Overmind
Commercial Projects:
- Backend with GraphQL (Lucidogen Sàrl)
- Frontend with permissions (Service and Logistics Group)
- Multi-tenant e-commerce platform
- Car wash workflow system
Specialization: Legacy code modernization, type hinting, backend architecture, permission systems.
Portfolio: henri.sancode.it
Languages: Polish, German, English (fluent).
CV / Résumé
Oct 2023 - Apr 2024
Senior Frontend Developer
Service and Logistics Group sp. z o.o.
Frontend for rail cargo system. Created Admin Panel with permission logic for different user groups and Dispatcher's Book. Established state machine naming conventions. Stack: TypeScript, React, Overmind.
Jan 2023 - Now
Senior Fullstack Developer
Niezależne projekty / Independent Projects
Currently developing two projects: multi-tenant e-commerce platform for artists and workflow system for car wash businesses. Stack: Morepath, PonyORM, PostgreSQL, React, Overmind. Focus on type hints and clean architecture.
Jul 2018 - Dec 2018
Senior Backend Developer
Lucidogen Sàrl
Backend for music school educational platform. Designed GraphQL API with high security requirements, secure student-teacher messaging system, authentication with GDPR compliance. Stack: Node.js, GraphQL.
Nov 2006 - Now
Open Source Maintainer & Developer
Independent / Open Source
Backend dla platformy edukacyjnej szkół muzycznych. Zaprojektowałem GraphQL API z wysokimi wymaganiami bezpieczeństwa, system secure messaging student-teacher, autentykacja z GDPR compliance. Stack: Node.js, GraphQL.
Portfolio
Portfolio showcasing open-source projects, technical skills, and experience. Maintainer of Morepath, Django Mezzanine, Overmind. Expertise in code modernization, type hinting, and CI/CD.
State-based router using state machines, published on npm. Mono-repo with GitHub Actions CI/CD, comprehensive documentation, example application, automated publishing with semantic versioning.
Maintainer of Morepath Python framework. Created extensions: more.jwtauth (JWT auth), more.pony (PonyORM integration), more.cerberus (validation). Framework architecture and open-source collaboration.