Senior Backend Engineer - Payments & Fintech

Xapply; Deutschland; Remote; EUR 90,000 - 150,000; Full time

Job summary

Xapply is seeking an experienced backend engineer to help rebuild and scale the financial systems at the core of a rapidly growing global platform. This role focuses on reliability, correctness, and performance across payments and billing workflows.

You will own the architecture and implementation of a canonical payments, subscriptions, billing, and entitlement platform, collaborating with Finance and Operations to ensure accurate financial records and auditable data while migrating from legacy

Job description

This is a high-impact backend engineering role focused on rebuilding and scaling the financial systems at the heart of a rapidly growing global platform.
You will own the architecture and implementation of a canonical payments, subscriptions, billing, and entitlement platform from the ground up.
The role combines deep backend engineering with complex financial workflows spanning multiple payment gateways, legal entities, and currencies.
You will work closely with Finance, Operations, and technical leadership to ensure every payment, entitlement, refund, and financial record is accurate and traceable.
Your work will directly improve revenue integrity, accounting accuracy, customer entitlements, and business reporting.
You will also lead a careful migration from legacy systems to a reliable, auditable platform without disrupting live customers or financial operations.
This is an ideal opportunity for an experienced engineer who enjoys solving complex money-system problems where correctness, reliability, and data integrity are critical.