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

Ratepay • Berlin

Full-time

Berlin

from today

Your Mission

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.

Your Profile

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.

The sweet spot! Let’s talk perks.

We're more than just a workplace – we're a vibrant community of innovators, collaborators, and visionaries who love what we do and reward those who work with us. Here, your career isn't just a job. It's an opportunity to thrive, learn, and make a difference. Take a look at these great personalised benefits of working at Ratepay On a monthly basis, you can choose between mobility, fitness, food, training and much more.

Flexible working hours and up to 80% remote work

Working from abroad (Up to 8 weeks a year)

28 vacation days per annum (+ 24th & 31st December free)

Financial security including Pension plan

Monthly lunches as well as Beets & Roots discounts

Learning and development (Flexible L&D budget, individual development plan, and internal learning formats)

Allowance for health, wellbeing, or fitness

Ratepaw community: Our office has a floor which is dog-friendly.

Our Recruitment Process

Step 1: Intro Call with a Senior Talent Partner

The first call with our recruiter is meant to be an introduction to ratepay, our culture and recruitment process.

We want to get to know you better, understand who you are beyond your CV and find out what excites you.

Step 2: Meet your future Manager

This step is designed to get to know your future manager and the role better.

During this conversation we will dive deeper into your experience and share more about the team you would work with and share expectations from both sides.

Step 3: Team interview & skill assessment

This step looks slightly different in different business areas but is to assess technical and culture add.

It usually consists of a role-specific case study or technical assessment as well as assessing values alignment with some senior members of the team you would be joining.

Step 4: Coffee chat (optional)

This step doesn't occur in every process, it depends on the role.

The coffee chat would generally take place with either a senior stakeholder from the business area you are joining such as a C-level leader or Head of department, or in some cases with a Senior HRBP.

Ready to shape the future of digital payments? Join our team

Apply now!

Want to learn more about other opportunities at ratepay? Explore our other departments:

Commercial Customer Service Data & Analytics Finance & Controlling Legal, Compliance, IT Security Marketing & Communications People & Organisation Product Risk Management Strategy & Special Projects Working students, Interns Initiative application