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Senior Backend Engineer - Bookings

Warsaw💼 Full-time💰 $216–$216🗓 2026-07-13 → 2026-07-31

Core

Design, build, and maintain scalable backend systems for SumUp's Bookings product to help merchants manage appointments and sell services.

Role type

Senior Backend Engineer

Builds

Online Store and Bookings products for small businesses

Domain

Fintech / E-commerce

Deliverable

production ML models | product features | infrastructure

Required skills

Kotlin, Java, Spring Boot, PostgreSQL, Kafka, Docker, Kubernetes, AWS, RESTful APIs, distributed systems, event-driven architectures, CI/CD pipelines, observability tools

Preferred skills

gRPC, Protobuf, backend performance optimization

Responsibilities

Design and maintain scalable backend systems; Collaborate with frontend and mobile engineers to deliver features and improve APIs; Participate in technical planning, code reviews, and design discussions; Optimize performance and ensure observability; Contribute to shaping the technical roadmap

Seniority

Senior, hands-on IC

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