• Develop web applications using the Java programming language, following software development standards and best practices; • Contribute to the design and architecture of complex systems, including definition of design patterns, reusable components, and scalability strategies; • Implement server-side features and integrate with front-end technologies in web applications; • Write clean, efficient, and scalable code, ensuring software quality and reliability; • Perform unit and integration tests to validate the correct functioning of developed features; • Collaborate with the development team, participating in planning meetings, code reviews, and other project-related activities; • Provide ongoing maintenance of existing applications, fixing bugs, implementing new features, and refactoring code as needed.

• Creation and enhancement of features for Clicksign's core product. • Writing clean, efficient, and well-organized code, applying best practices. • Planning and executing unit and integration tests to ensure system stability. • Collaborating closely with other teams, promoting knowledge sharing and continuous improvement. • Continuous learning and applying new technologies and development methods.

• Features bauen: von der Idee bis zum Deployment. Keine Wasserfall-Specs, sondern Eigenverantwortung. • Mit AI Lösungen entwickeln : Claude Code, LLM-APIs und AI-gestützte Workflows sind bei uns kein Experiment, sondern der Standard. • Du baust Features schneller, weil Du AI als Multiplikator einsetzt. • Produkt mitgestalten : Du sitzt mit am Tisch, wenn wir neue Produkte und Features planen. Deine Meinung zählt vom ersten Tag. • Infrastruktur mitbauen : CI/CD, Datenbank-Architektur, API-Design - pragmatisch und ohne Silos.

• Build and maintain core services for the Wire platform, improving scalability, reliability, and security while collaborating across teams. • Develop and maintain backend services in Haskell and actively contribute to the evolution of our existing backend codebase. • Contribute to architectural decisions and help make our backend platform more stable, scalable, and maintainable. • Implement new features in close collaboration with Product, Client Engineering, CoreCrypto, Security, and QA. • Work on large-scale service-oriented and federated architectures. • Support the evolution of our data architecture, including migration towards PostgreSQL. • Take responsibility for backend topics within your feature scope and ensure alignment between the scope and the backend team. • Build robust, well-tested software and collaborate with QA and engineering teams to continuously improve quality, stability, and security. • Share knowledge regularly with the backend team and contribute to a strong engineering culture. • Work on software where security, privacy, and reliability are core requirements.