Software Engineer

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.

• 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

We are looking for an experienced Software Engineer who specializes in company-wide cross-functional topics and takes ownership of several cross-cutting software components.
In this role, you will develop scalable and robust Python services that are used by other development teams and integrated into core business processes. You will work closely with various teams to continuously improve our platform and deliver efficient, future-proof solutions. Your expertise in software architecture and system design will play a key role in shaping our technical landscape.

Key Responsibilities

• Take ownership of key parts of the software development lifecycle, initially focusing on implementation, and later extending to requirements analysis and architecture
• Develop high-performance, event-driven, and secure software solutions in Python
• Collaborate closely with Quality and Operations Engineers to ensure the highest standards in stability, security, and maintainability
• Perform error analysis, debugging, and performance optimization to identify and eliminate bottlenecks

• At least three years of experience in software development with Python, particularly with FastCGI and Flask
• Experience in API design and developing RESTful services
• Knowledge of database integration (SQL/NoSQL, e.g., PostgreSQL, Redis)
• Hands-on experience with CI/CD pipelines, Docker, and Kubernetes
• Experience with cloud applications and microservice architectures
• Familiarity with agile methodologies and a strong focus on continuous improvement
• Proactive and adaptable working style with a broad understanding of the software stack
• Openness to new technologies and technical challenges
• Excellent German and English skills, both written and spoken

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.

Very important

Come as you are. Retarus is committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity, or veteran status.

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:

We're
looking forward to getting to know you