About the job
About Our Team
At SumUp, we provide a comprehensive Point-of-Sale (POS) solution designed to empower businesses such as cafes, shops, bars, and salons to streamline operations and foster growth. Our platform encompasses a variety of features including product catalogs, inventory management, business analytics, compliance assistance, and loyalty programs.
The Fiscalization team is dedicated to ensuring compliance in countries like Italy, Sweden, Norway, Belgium, and Austria, among others. We are also pioneering the integration with third-party services for fiscalizing receipts.
As a Senior Backend Engineer, you will work alongside a vibrant, cross-functional team comprising Product Managers, Designers, Engineering Managers, and fellow engineers.
Your Role
In this position, you will develop secure backend systems that ensure SumUp's POS products are compliant across various countries on our roadmap. You will collaborate with the Fiscalization squad to devise unique solutions tailored to the challenges in each market.
We are looking for a developer who values user-centric design, precision, and seamless collaboration. You will excel in a structured communication environment and thrive in a cross-functional team.
This is a B2B role based in Warsaw.
Key Responsibilities
- Design and maintain fiscal compliance solutions to support SumUp's expansion across Italy, Sweden, Norway, Belgium, Austria, and other European markets.
- Develop integrations with third-party services for receipt fiscalization and regulatory reporting.
- Navigate SumUp's intricate POS ecosystem and familiarize yourself with fiscalization frameworks across multiple jurisdictions.
- Work collaboratively with team members and stakeholders distributed across 5+ cities in a hybrid working model.
You Will Succeed in This Role If You Have:
- 5+ years of experience in backend engineering with expertise in Java and/or Kotlin.
- A solid understanding of system architecture, design principles, data modeling, and API development.
- Hands-on experience with distributed and fault-tolerant systems.
- Proficiency in AWS and Kubernetes.
- Strong knowledge of Kafka, PostgreSQL, and CQRS.

