Java UI Migration Engineer

Analyze existing Java Swing UI masks to understand their behavior and service dependencies, then rebuild approximately 300 UI masks in the Vaadin framework while ensuring visual and functional consistency with the original application. Collaborate closely with a team of 15 internal developers to incorporate architecture feedback during the migration of this large-scale desktop application. This structured, independent engagement begins September 1, 2026, with a workload of 20–80% over a duration of 1–3 months, based in a hybrid model in Zurich with remote options. Fluent German skills are required, with written and spoken proficiency essential for this Swiss-based project.