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Senior Backend Engineer - Transfers

SumUpVilnius, Lithuania
On-site Full-time

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Experience Level

Senior

Qualifications

Key Responsibilities: Own end-to-end high-availability production services for money movement, including delivery, observability, maintenance, and operational support. Lead small to mid-sized initiatives and take accountability for significant portions of larger team projects. Steer architectural and design decisions, focusing on system design, data modeling, and API boundaries. Enhance service reliability and quality through testing, monitoring, alerting, and continuous improvement of delivery pipelines. Participate in on-call rotations, incident responses, and post-incident reviews for the systems you build. Adopt a backend and systems perspective during refinement sessions to identify risks, dependencies, and technical trade-offs early in the process. Work closely with Product, QA, and engineers across teams to deliver comprehensive transfer and banking capabilities.

About the job

Join the dynamic team at SumUp, where the Global Bank tribe is dedicated to building robust infrastructure and essential services that empower merchants with digital business accounts, simplifying banking for millions of small enterprises.

The Transfers Gateway squad plays a crucial role by connecting SumUp’s internal systems to external financial networks across the EU and the UK. We are responsible for the services that facilitate daily money movement through various payment schemes. Our team oversees the complete integration process and manages production services that handle real transactions at scale. You will be instrumental in modernizing legacy systems while ensuring reliability, accuracy, and adaptability, making architectural choices that directly impact uptime and enhance the merchant experience across diverse markets.

Our tech stack comprises Go, AWS, Kafka, PostgreSQL, and Kubernetes, reinforced by a comprehensive observability toolchain including Prometheus, Grafana, and Honeycomb. We leverage AI-assisted development tools such as Cursor and GitHub Copilot to enhance our workflows.

At SumUp, we foster an engineering culture rooted in ownership. We operate on a “build it, run it, improve it” philosophy, emphasizing strong observability and continuous learning. Engineers enjoy clear responsibilities and autonomy, with decisions documented and made collaboratively.

The Vilnius team is integral to the Global Bank domain, managing production systems, influencing technical direction, and collaborating with colleagues across SumUp’s global offices to enhance critical merchant banking capabilities. Be a part of our Vilnius Team today! (Vilnius office)

About SumUp

SumUp is a leading global provider of payment solutions, dedicated to empowering small businesses with accessible and reliable financial services. Our Global Bank tribe focuses on creating innovative tools and infrastructure that enhance the banking experience for merchants worldwide.

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