Become Lead Software Engineer (m/f/d) - Java at Retarus.

Retarus is a worldwide provider of cloud-based messaging solutions at enterprise scale. We serve over 40% of the companies listed on the S&P Global 100, e.g. Adidas, Bayer, SAP, BNP Paribas, Goldman Sachs, T-Systems, Swarovski & UPS, as well as governmental agencies and major players in markets across the world. Privately owned and founder-managed for over thirty years, Retarus is customer-oriented, stable, a fair employer, and a strategic business partner with a long-term vision. With some 500 employees in 19 offices on four continents, Retarus operates locally and thinks globally: our teams are organized across borders and are highly integrated. This makes Retarus a multicultural, multilingual, and engaging workplace. We are committed to creating a diverse and dynamic environment for our employees, with generous compensation, time off, and a global, collaborative workplace.

What we offer

• Mobile working and flexible working time
• Collaborative, diverse company culture and superior team spirit
• Flat hierarchies and great feedback culture
• Development opportunities & career perspective
• International business & cross-site collaboration
• Modern, dog-friendly offices with nice amenities
• Company-paid health insurance, public transportation, lunch vouchers and further benefits

What you'll do

• Take responsibility for architectural leadership by defining and driving the technical vision, establishing architectural standards, leading design reviews, and ensuring scalable, secure, and maintainable solutions across the platform
• Monitor and optimize pipeline performance, ensuring high reliability, observability, operational efficiency, and continuous improvement of system performance and stability
• Improve the Intelligent Document Processing (IDP) pipeline by enhancing workflows, increasing scalability, and driving technical excellence across the end-to-end processing landscape
• Modularize AI functionalities by defining clear service boundaries, reducing system complexity, improving maintainability, and enabling future growth and innovation
• Support the in-housing of critical technologies and knowledge transfer initiatives by mentoring engineers, promoting best practices, fostering technical ownership, and building sustainable expertise within the organization
• Strengthen team enablement and mentorship by coaching engineers, providing hands-on technical guidance, conducting code and design reviews, and fostering a culture of collaboration, accountability, and continuous improvement

What you'll need

• A university degree (Bachelor’s or Master’s) in Computer Science, Software Engineering, or a related field
• At least 7 years of professional experience in Software Engineering or a comparable technical role
• Strong technical expertise in Java, system architecture, and modern AI/LLM technologies
• Strong communication skills with the ability to clearly articulate technical concepts across teams and stakeholders
• Hands-on mentality combined with a pragmatic and solution-oriented approach
• Strong collaboration skills with experience working effectively in cross-functional and cross-team environments
• Strategic thinking with the ability to balance long-term architectural vision and short-term delivery needs
• Excellent written and spoken German and English skills (C1 level or native speaker)
• Nice to have: experience with Intelligent Document Processing (IDP) systems
• Nice to have: experience successfully supporting or leading in-housing initiatives or knowledge transfer programs

What you can expect

At Retarus, you will work on impactful and dynamic projects, with real opportunities to make a difference. Our customers are leaders across diverse industries, with constantly evolving needs and high expectations. You’ll be working with cutting-edge technology and great creative leeway to meet customers’ needs – and the projects you work on will be deployed globally. Working at Retarus, you will collaborate closely with convivial, culturally diverse teammates. You will grow professionally in a dynamic and exciting workplace and design impactful solutions in real time with top companies.

Apply via our online application portal – it’s easy and doesn’t take long. Our colleague Alissa Selman is happy to field any questions you may have: Alissa.Selman@retarus.de

We’re looking forward to getting to know you!