At Ratepay, we develop next-generation payment solutions that power the checkout experience for some of Germany’s largest online retailers and marketplaces. As a Senior Software Engineer (m/f/d), you’ll play a key role in building secure, scalable, and user-friendly Buy Now, Pay Later products in a dynamic and fast-growing e-commerce sector.
You’ll join a collaborative, agile team dedicated to enabling seamless commercial and technical onboarding of merchants, marketplaces, and resellers. Our focus is on modern integrations, fast onboarding, and intuitive configuration—making it easy for merchants to go live quickly while also improving the experience for internal Ratepay teams involved in the process.

Your Key Responsibilities:

• You take ownership of the design, development, operation and continuous improvement of our systems, ensuring high performance and stability.
• You integrate internal and external APIs within a modern microservice architecture, with scalability and maintainability in mind.
• You contribute actively to our agile software engineering process, collaborating with cross-functional teams including Product, Infrastructure, and Risk.
• You mentor and support junior engineers, sharing knowledge and fostering a culture of learning and growth.
• You bring in your ideas and technical experience to continuously challenge the status quo and drive innovation within the team.
• You will be responsible for operational success of the teams services also being on call.

At Ratepay, you’ll work in an environment built on trust, ownership, and collaboration. We believe in empowering engineers with autonomy, modern tooling, and the space to make meaningful technical decisions. You’ll work closely with experienced colleagues from diverse backgrounds, benefit from transparent communication, and have the opportunity to grow both personally and professionally. We value balance, flexibility, and a healthy work culture—because great products are built by teams that thrive.

We value our diversity and welcome everyone to our team. Regardless of ethnic and social background, religious views, worldview, gender, sexual orientation, physical and mental limitations, age, marital status, educational background, and nationality. With over 200 employees and 40 different nationalities, we take our values seriously. These include; ownership, growth, integrity, collaboration, customer centricity and inclusion.