Stellenbeschreibung:

We are looking for a skilled Java developer
to help build a professional web application that may later be converted into an iOS app.

You will work closely with us — we provide requirements and conceptual design — and you will translate these into a working product using your own coding plus AI-assisted development. The architecture must follow object-oriented design, event-driven principles, and hexagonal (ports & adapters) architecture.


You’ll Do
• Environment & pipeline
• Project bootstrapping (Gradle or Maven), Git workflow, basic CI (GitHub Actions/GitLab CI), quality gates (format/lint/tests).
• Local run via Docker/Docker Compose (nice to have).


• Architecture & implementation
• Implement features using OO design, event-driven interactions (domain events), and hexagonal architecture (domain, application, ports/adapters).
• Choose/implement a rendering framework (preferably Vaadin; open to your suggestion with rationale).
• Expose clean REST endpoints (or events) and maintain separation of concerns.


• Professional delivery
• Clear README, lightweight ADRs (architecture decisions), meaningful commits, minimal but solid unit/integration tests.
• Use AI tools responsibly (e.g., ChatGPT/Copilot) while ensuring correctness and maintainability.


Must-Have
• Strong Java and professional web app experience.
• Hands-on with Vaadin or another rendering framework (and willing to use Vaadin).
• Comfortable with hexagonal architecture (ports & adapters), event-driven patterns, and OO design.
• CI basics (GitHub Actions/GitLab), Gradle/Maven, Git best practices.


Nice-to-Have
• Docker deployments, basic cloud (any).
• Experience converting web apps to iOS (Swift or cross-platform) later.
• Experience with microservice-friendly design and domain events.


Engagement
• Start: immediately · Remote
• Budget: $10–20/hour depending on skill/fit
• Initial milestone: environment + foundation + first feature
• Ongoing collaboration if successful


How to Apply (short and specific)
• Briefly describe your Java + Vaadin (or similar) experience.
• Share one repo/code sample (your code) for a Java web app.
• State your hourly rate and weekly availability.
• Confirm you’re comfortable with OO + event-driven + hexagonal and AI-assisted dev.
• No agencies pasting templates, please. Individual contributors or small teams only.