Senior Software Engineer - Fullstack (m/f/d)

Festanstellung, Vollzeit · Berlin Hybrid

Your Mission

Together, we build next-generation solutions for major online retailers and marketplaces – shaping the digital payment landscape of tomorrow.

At Ratepay, as a Senior Software Engineer (m/f/d), you’ll play a key role in creating secure, reliable, and user-friendly Buy Now, Pay Later payment solutions in one of the fastest-growing sectors of e-commerce. You'll work in a collaborative, agile environment, contributing to products that power the checkout experience for some of Germany’s biggest merchants.

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.

That's What You Bring Along

You have 6+ years of hands-on experience in Java backend development, with Kotlin being a plus.
You possess solid frontend skills using Vue.js or another modern JavaScript framework.
You are proficient in Spring/Spring Boot, Docker, Git, and Maven.
You have experience building and deploying applications in cloud environments, preferably AWS.
You have strong database knowledge, especially with PostgreSQL, and some familiarity with MongoDB or Redis is a plus.
You understand RESTful APIs, OAuth2, event-driven architectures like Kafka, and microservices.
Ideally, you are familiar with Kafka Streams and contract testing tools such as PACT.
You are comfortable working in agile teams and embrace a DevOps mindset: “you build it, you run it.”
Experience in fintech or risk-related systems would be an additional advantage.

Equal Opportunities & Diversity

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.

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About us

We are where we are because we work together as one team. Because we got the freedom to execute ideas. And above everything: because we never stop improving. Here it is all about shared goals not about the big ego. We are dedicated pros (more than 250 of them) not cons. We embrace being courageous, committed and decisive, warm-hearted and having a will to win.

We have our origin in the heart of the payment scene and cover the whole value chain from integration support to the dunning process with a core of AI-based risk management. With us, you can integrate direct debit, instalments and prepayment. In other words: the favourite payment methods in Germany, Austria and Switzerland (the Dutch like it too). Located in the middle of Europe’s fintech metropolis (Berlin) we are proud to work with major partners such as Eurowings, Ebay and About You and hundreds more.

Deine Mission

Together, we build next-generation solutions for major online retailers and marketplaces – shaping the digital payment landscape of tomorrow.
At Ratepay, as a Senior Software Engineer (m/f/d), you’ll play a key role in creating secure, reliable, and user-friendly Buy Now, Pay Later payment solutions in one of the fastest-growing sectors of e-commerce. You'll work in a collaborative, agile environment, contributing to products that power the checkout experience for some of Germany’s biggest merchants.

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, DevOps, 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.

Das bringst Du mit

You have 6+ years of hands-on experience in Java backend development, with Kotlin being a plus.
You possess solid frontend skills using Vue.js or another modern JavaScript framework.
You are proficient in Spring/Spring Boot, Docker, Git, and Maven.
You have experience building and deploying applications in cloud environments, preferably AWS.
You have strong database knowledge, especially with PostgreSQL, and some familiarity with MongoDB or Redis is a plus.
You understand RESTful APIs, OAuth2, event-driven architectures like Kafka, and microservices.
Ideally, you are familiar with Kafka Streams and contract testing tools such as PACT.
You are comfortable working in agile teams and embrace a DevOps mindset: “you build it, you run it.”
Experience in fintech or risk-related systems would be an additional advantage.

Chancengleichheit & Vielfalt

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Über uns

We dare to design the future of payments. Ratepay is energy and diversity and: custom-made state-of-the-art payment solutions. Established in 2009 we were a fintech before the word fintech even existed. Today we are the number one white-label Buy Now Pay Later payments provider in Europe handling over 2.5M transactions per month and we’re constantly growing.

We are where we are because we work together as one team. Because we got the freedom to execute ideas. And above everything: because we never stop improving. Here it is all about shared goals not about the big ego. We are dedicated pros (more than 210 of them) not cons. We embrace being courageous, committed and decisive, warm-hearted and having the will to win.

We have our origin in the heart of the payment scene and cover the whole value chain from integration support to the dunning process with a core of AI-based risk management. With us, you can integrate direct debit, instalments and prepayment. In other words: the favourite payment methods in Germany, Austria and Switzerland (the Dutch like it too). Located in the middle of Europe’s fintech metropolis (Berlin) we are proud to work with major partners such as Eurowings, Ebay and About You and hundreds more.

Auf diese Stelle bewerben

Deine Bewerbung

Wir freuen uns über dein Interesse an Ratepay GmbH. Bitte fülle das folgende kurze Formular aus. Solltest du Schwierigkeiten mit dem Upload deiner Daten haben, wende dich gerne per Email an jobs@ratepay.com.