Senior Software Engineer (m/f/d)

Unzer is a leading European fintech company with a mission to simplify international payments for e-commerce and retail businesses. Our brand was formed from 13 companies that now contribute to building a unique product covering the entire payment flow.

At Unzer, we are driven by the belief that customers should enjoy a seamless shopping experience, no matter where they choose to shop. We are a team of over 750 experts from 70 different nationalities, dedicated to creating a state-of-the-art unified commerce platform. Our goal is to enable businesses to delight their customers with a seamless payment experience.

Whether you're a tech enthusiast, payment expert, or dedicated support professional, we are looking for individuals who are passionate about making a difference.

Our offices: We are based across Austria, Denmark, Germany, and Luxembourg with a HQ in Berlin.

About The Team

You'll be part of the team responsible for the backbone of our e-commerce payment processing, building the services that move money safely and at scale. We care deeply about resilience, observability, and getting the hard details right, because in payments there's no room for "good enough."

Our mission

We build robust, efficient, and user-friendly software that solves real-world problems. We grow our skills continuously and collaborate ethically and professionally to make a positive impact on our users and the business.

What your work will look like:

• You'll design and implement complex features end to end, backing them with solid testing and clear documentation.
• You'll take ownership of key components and systems in your product area and drive their delivery in close collaboration with your team.
• As a senior voice, you'll mentor junior engineers, provide technical guidance, and help shape architectural decisions and technical direction across your domain.
• You'll also keep raising the bar, proactively spotting ways to improve our codebase, tooling, and processes.

• A Bachelor's or Master's in Computer Science (or equivalent) and several years of hands-on software engineering experience.
• Advanced proficiency in Java, including designing and optimizing large-scale systems.
• Solid experience with databases such as PostgreSQL and MongoDB, including data modeling and performance tuning.
• A deep understanding of Agile ways of working and lifecycle best practices, including CI/CD and test automation.
• Strong communication and mentoring skills, with the confidence to drive technical discussions and decisions across teams, including integrating complex APIs in modern architectures.

• Does it sound exciting? - Apply with your CV in English. Please don’t shy away if you don’t meet all the requirements! We’re looking forward to meeting you.
• The interview process includes: a 30min intro call with a TA Partner, a 60min hiring manager interview, 60min technical call with the team and an executive interview (30min, optional). Please note the process might alter depending on our team’s availability.

🏡 Work from home up to 60% of the time. We want you to keep your work-life balance.

🚲 Mobility support, whether you choose Swapfiets, Jobrad, or a Deutschlandticket - we've got you covered.

🫴 Explore counselling assistance, be it for professional or personal matters, through our associated platform.

💰 Pension scheme, we want to give back and help you secure your future.

🏖️ 15 days a year to work from your desired destination within the EU.

🕟 Flexible working hours – you get to choose the schedule that works best for you!

📗 Learning budget of 1000 euros per year – you can develop your passions with us.

🎉 Enjoy some fun moments with your coworkers – we throw a company party once a year and host several team events!

*Unzer is an equal employment opportunities workplace, and we commit to hiring regardless of race, sex, gender identification, sexual orientation, national origin, native language, religion, age, disability, marital status, citizenship, genetic information, pregnancy, or any other characteristic protected by law. Please refrain from including your picture and age with the application.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us. You can also find our applicant privacy information here: https://shorturl.at/Zwhtv