hardtmedia | St. Wendel, Saarland, Germany | remote or on-site
Freelance full-stack developer for web applications, integrations and legacy systems
I build and modernise software from the data model to the user interface: Angular and React on the frontend, Java, PHP and Node.js on the backend, Oracle and MySQL on the data side. Around 20 years in the profession, self-employed since 2009.
I join running projects, take over systems nobody wants to touch any more, and build new applications from scratch. My design background in advertising still shapes my work today: I think about applications from the user's side, not just from the code.
The projects others put off: outdated dependencies, upgrades across several major versions, codebases that have grown over years. I get up to speed quickly, bring the system to a current, maintainable state and document what I found and changed.
e.g. Angular 10 to 20, Java 17 to 21, Cordova via Capacitor to a PWA
Business applications and platforms across the whole stack, including database performance analysis, tests, Git and CI/CD.
Angular, React, Vue (Quasar), TypeScript, Java (Dropwizard, Hibernate), PHP, Node.js, Oracle, MySQL, Apache Solr
Connecting software to third-party APIs, e.g. shops to SAP or inventory systems. Shop projects with Shopify (themes, apps, Liquid) and Magento.
REST, GraphQL, e-invoicing to ZUGFeRD / EN 16931
Offline-capable mapping applications for field work, apps and PWAs for iOS, Android and desktop, biodiversity platforms based on the Atlas of Living Australia.
OpenLayers, Ionic, Capacitor, Service Worker, SQLite (WASM)
From Arduino prototype to production-ready field device: custom circuit board, low-power firmware and enclosure from a single source.
C++, STM32, PlatformIO, KiCad, FreeCAD, 3D printing
Building and coordinating teams, gathering requirements and checking feasibility, Kanban with acceptance checks, status reports in plain language for everyone involved.
Clear for business departments and developers alike
A selection of current projects. Detailed project descriptions and my CV are available on request.
The central system from purchasing and warehouse to invoicing, in four product variants. I am one of the two lead developers.
Rangers record georeferenced observations in the field, even without mobile coverage. Since 2017 I have maintained and developed the system as the sole developer.
Research server that makes species records and monitoring data findable and reusable. I lead the project and the team and am responsible for the user interface.
A makeshift Arduino solution became an autonomous, battery-powered field device for the forest that separates the catch at sunrise and sunset.
I started out as a state-certified media assistant at an advertising agency, working on print design, shop window advertising and early websites. Video and audio came later, hence the name hardtmedia. A degree in Media Computer Science (B.Sc.) at the Environmental Campus Birkenfeld took me into software development.
As the founder of a start-up and a lecturer at Trier University of Applied Sciences, including iOS programming and image processing, I know both sides: owning a product and passing on knowledge.
As a private pilot and flight instructor, I bring a structured, careful way of working: clear processes, precise communication and a sense for where errors creep in before they become expensive.
Do you have a project, a maintenance backlog, or need reinforcement for your team? Send me a short note about what you need.
Email: info@hardtmedia.de
Mobile: +49 176 62913736
CV and detailed project list available on request, in English and German.