• Design, develop, and maintain scalable backend applications using modern Java (17/21) and the Spring ecosystem • Own software delivery from architecture and implementation through deployment, monitoring, and production support • Build and evolve microservices, RESTful APIs, and distributed systems with a focus on performance and reliability • Participate in solution design, technical decision-making, and architectural discussions across engineering teams • Diagnose production issues, optimize system performance, and implement robust long-term solutions • Collaborate closely with product and engineering stakeholders to challenge requirements and deliver high-quality outcomes • Mentor developers through code reviews, technical guidance, and knowledge sharing • Contribute to technical hiring and help strengthen engineering standards across the organization • Leverage AI coding assistants to improve development speed, code quality, and debugging workflows

• Participate in the design, development, testing, and maintenance of Java-based applications • Write clean, efficient, and well-documented code following best practices and coding standards • Support the development of backend services and APIs using Java and the Spring Framework • Collaborate with cross-functional teams, including product, QA, and senior developers, to deliver high-quality software solutions • Assist in troubleshooting, debugging, and resolving technical issues • Contribute to database-related tasks, including writing and optimizing SQL queries • Take part in code reviews and learn from feedback to continuously improve code quality

• Design, develop, and maintain robust backend services and scalable systems using Java • Architect and implement cloud-native solutions leveraging the Google Cloud Platform (GCP) ecosystem • Develop high-performance microservices and handle asynchronous data processing • Work extensively with event-driven architectures and messaging systems such as Pub/Sub and RabbitMQ • Manage and optimise relational databases, specifically focusing on PostgreSQL • Design, build, and integrate secure and efficient RESTful APIs • Collaborate closely with cross-functional teams to ensure seamless project delivery

• As part of the team you build new features • Solve scaling problems and take responsibility for entire projects — from the idea to reliable operation • We are looking for people who do more than just work through tickets: who understand systems, improve them, and actively help shape the e-invoicing landscape • You develop backend features with PHP 8.x and Symfony: domain logic, APIs and interfaces in a data-heavy codebase that has evolved over 18+ years • You work on the frontend with TypeScript, React and TanStack on modern UIs and production-focused workflows • You develop Node.js services for selected areas of our platform using TypeScript and Next.js • You work on JVM microservices with Java and Kotlin in the e-invoicing domain • You migrate data, refactor existing modules and modernize legacy PHP areas step by step in a clean way • You delve deep into error analysis and debugging when systems don’t behave as expected • You use AI as a real productivity lever • Depending on the topic, you also work on infrastructure and local dockerized development environments