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Senior Backend Engineer - Fiscalization

SumUp
Backend Developer • Senior • On-site • Full-time • 📍 Warsaw
📄 View original listing (EN)

SumUp is looking for a Senior Backend Engineer to join its Fiscalization team, which makes the company's Point-of-Sale (POS) products fiscally compliant across European markets. The role focuses on building secure backend systems and integrations for receipt fiscalization and regulatory reporting. This is a B2B role for the team in Warsaw, with a monthly salary range of 18,850-29,660 PLN.

Stack

AWSJavaKafkaKotlinKubernetesPostgreSQL

Responsibilities

  • ▹Build and maintain fiscal compliance solutions to enable 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 systems
  • ▹Navigate SumUp's complex POS ecosystem and master fiscalization frameworks across multiple jurisdictions
  • ▹Collaborate with distributed squad members and stakeholders across 5+ cities in a hybrid environment

Requirements

  • ▹5+ years of experience in backend engineering with Java and/or Kotlin
  • ▹Strong understanding of fundamental system architecture, design principles, data modeling and API design
  • ▹Strong experience with distributed and fault-tolerant systems
  • ▹User-level experience working with AWS and Kubernetes
  • ▹Good knowledge of Kafka, Postgres and CQRS

Soft skills

User-centric design mindsetPrecisionStructured communicationThrives in a cross-functional environment

What we offer

  • ▹Commitment to diversity and inclusion
  • ▹VSOP program - a stake in SumUp's success
  • ▹Fitness support: on-site gym or Multisport card subsidised for sports facilities across Warsaw
  • ▹Health insurance for you and your family, plus life insurance
  • ▹PPK (Employee Capital Plan) with joint contributions from SumUp and the State
  • ▹26 days of paid leave plus public holidays and special leave days
  • ▹Break4me: 1-month sabbatical after 3 years of service
  • ▹Referral bonus
  • ▹Salary range: 18,850-29,660 PLN per month

About the company

SumUp builds simple, affordable financial tools for small businesses. Its POS solution empowers cafes, shops, bars, hair salons and other businesses with product catalogs, inventory management, business analytics, compliance support and loyalty tools.