Principal Backend Engineer
Core
Design and build resilient, scalable fintech infrastructure for payments, merchant onboarding, and transaction processing across Europe.
Role type
Principal Backend Engineer (Fintech)
Builds
Cloud-native payment platforms, high-volume transaction processing systems, and merchant onboarding workflows.
Domain
Fintech / Payments / European Markets
Deliverable
production ML models | product features | infrastructure
Required skills
Distributed systems architecture, Java 17+, Spring Boot, Microservices, Event-driven architecture, System design, AWS, Kubernetes, API design (REST/gRPC), Domain-driven design
Preferred skills
Fintech domain experience, Mentorship of senior engineers, Cross-organizational leadership
Technologies
Java, Spring Boot, Kotlin, Kafka, AWS, Docker, Kubernetes, gRPC
Responsibilities
Own architecture for critical platforms, design high-scale cloud-native systems, lead development of secure transaction services, define backend standards and API patterns, partner with Product and Data teams, lead cross-organizational growth initiatives
Seniority
Principal, hands-on IC with strategic influence
