Felix Geller

Led design and implementation of core servicing component for merchant cash advances, with multiple collection strategies supporting 10k transactions per day across about thousands of advances.
Designed and built partner split collection strategy enabling API-driven repayments for large partners (Uber, Housecall Pro, GoDaddy).
Co-led design and implementation of partner API, enabling partners to selectively automate parts of the onboarding flow, supporting a full-serve integration.
Drove full app rollout to CA market and expanded payment infrastructure to support GB, CA, AU markets with respective payment rails.
Replaced manual spreadsheet-based investor portfolio reporting with automated solution processing millions of line items.

Owned port of core marketplace components from REST to gRPC interface (buybox and checkout).
Built refund support and automated payout commission calculations.
Integrated external solutions for fraud risk assessment and coupon management.
Promoted from Senior Software Engineer to Team Lead within three months to build and grow a new team.

Owned migration of high-throughput email campaign system from monolithic to micro-service architecture to achieve millions of emails in under 5 minutes and ensure safe processing of loyalty points across multiple active campaigns.
Set up monitoring, alerting and continuous integration infrastructure to support rapid delivery in a micro-service environment.
Technical lead for AMC integration, one of the largest cinema chains in the US.
Drove interface localization of main web application to support expansion into Hispanic and Asian markets.
Ported performance-critical segmentation application from row- to column-oriented database to achieve two orders of magnitude speed-up.

Designed and developed web application for monitoring and inspecting fraud cases in VoIP networks.
Developed a multi-process application to detect and prevent fraudulent use of VoIP networks based on packet inspection.

Developed Android app for end user to report car insurance claim directly to SAP business services.
Implemented an OASIS standard compliant messaging component.