Software Engineer (Java) - (m/f/d)
Confirmed on the employer's own hiring board on Oct 23, 2026. First seen by Alion on Oct 23, 2026.
ABOUT US
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 700 experts of 55 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 a 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
The Foundations group is focused on delivering core platform software products. Starting from gateways, through merchant onboarding and offboarding reaching the billing systems and debtor management solutions of Unzer.
What your work will look like:
- Design, build, test, and operate cloud-based microservices (Java/Spring Boot, Kafka)
- Write automated tests (unit, integration, and end-to-end) as an integral part of your daily work
- Contribute to product design by writing technical specifications - clear enough to
guide both engineers and AI agents
- Use AI-assisted development (coding agents, AI code review, spec-driven workflows)
in your daily work and help us evolve how we use it
- Work with the Unzer Tech standards and processes and help us improve them
- Be actively involved in team and organizational knowledge-sharing
What you need to be successful in this role:
- 5+ years of experience with Java 21+ and Spring Boot
- Solid knowledge of data structures, algorithms, operating systems and distributed systems
- Experience with SQL databases (schema design, migrations); NoSQL is a plus
- Experience with microservices, event-driven messaging (Kafka, Avro) and
Git-based workflows (feature branches, pull requests, code review)
- You diligently test (ideally test-first/TDD) and document your deliveries
- Experience in architecture design (e.g. Domain-Driven Design) and common design patterns
- Experience with observability tools such as Coralogix or OpenTelemetry
- Hands-on experience with AI coding assistants/agents (e.g. Claude Code, GitHub Copilot):
you use them productively and critically review, test and own the code they produce
- Hands-on mentality
Nice to have:
- Frontend experience with Angular
- Know-how in delivering software to the AWS cloud platform
- Experience with Docker, Kubernetes and GitOps (e.g. Argo CD)
- Experience building agentic workflows (MCP integrations, custom agent skills,
AI steps in CI such as automated PR review)
- Experience in regulated environments (payments, PCI-DSS, GDPR)
What’s next?
- 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.
- We will get back to you within 7 days of receiving your application.
- The interview process includes a 30-minute intro call with a TA Partner, a 45-minute conversation with the Hiring Manager, and a technical interview with the team (60- 90 mins). Please note the process might alter depending on our team’s availability.