Yonatan Karp-Rudin

Billie, Berlin, Germany

Owns payments/compliance platform reliability across service boundaries, vendor integrations, migration work, and operational tooling.

• Took ComplyAdvantage transaction monitoring live, validated in shadow mode before blocking payments.
• Rebuilt the compliance service around hexagonal architecture and a transactional outbox.
• Designed the dead-letter and replay pattern for payment services and shipped it as a shared Spring Boot library.
• Built a Backstage Payments Hub that replaced Postman workflows, and on-call triage tooling used across about 80 production incidents.

Billie, Berlin, Germany

Led Staff-level risk work: moving risk decisions into a Risk-owned orchestrator, the Ravelin fraud integration, and the target architecture for buyer risk.

• Moved risk decisions from Purchases to a Risk-owned orchestrator, from RFC to production.
• Led the Ravelin graph fraud integration to production.
• Authored the Buyer Risk Assessment target architecture and the tokenization specification.

Billie, Berlin, Germany

Built Risk's credit limit and fraud-labelling services, and moved risk signals to event-driven, engineering-owned pipelines.

• Built a credit limit service and a fraud-labelling service from scratch.
• Replaced synchronous calls between Risk and Refinancing with an event-driven credit score for Pan-European refinancing.
• Moved real-time fraud features from Data Science to Engineering.
• Led EDA 2.0 across 12 repositories and set shared CI and code standards for the Risk team.

SumUp, Berlin, Germany

Built shared backend foundations: a service template, a money library used across backend and Android, and large data migrations.

• Cut new service setup from a week to 1-2 hours with a service template.
• Built the money library shared by SumUp's backend and Android apps, and the authorization and permissions libraries for point-of-sale services.
• Migrated 6 years of historical data with minimal production impact.
• Introduced SLO monitoring and on-call rotations for critical point-of-sale services.

NICE, Ra'anana, Israel

Backend development on a distributed product, focused on cache performance and reliability.

• Refactored a product's cache system for performance and reliability.
• Built Jira-integrated release tooling in Python.

Inuitive, Ra'anana, Israel

Vision-processing algorithms in C++, and production lines for the chips in South Korea and China.

• Developed algorithms for vision processing chips in C++.
• Set up production lines and their calibration tooling on-site in South Korea and China.