Technical Support Engineer (B2B Fintech / Payments)

About the Client Our client provides payment infrastructure for businesses and merchants. Its platform brings together card payments, payouts and other payment methods for international customers. Role Overview Take ownership of challenging payment issues, from the first alert to a clear resolution.

As a Technical Support Engineer, you will work with B2B merchants and payment providers, investigate transactions using APIs and logs, and help develop support practices. You will communicate with international clients in English and Russian. Key

Own technical support requests from B2B merchants and payment providers in Russian and English through to resolution. Investigate complex payment issues, identify root causes and drive corrective actions beyond standard troubleshooting. Analyse transaction failures using IDs, logs, API responses and JSON fields, including `status_code`, `transactionStatus

Reason` and 3D-Secure timeouts. Coordinate incident response with the development team, from initial alert through resolution. Manage daily refund requests and related dispute cases through to closure. Create and maintain internal Knowledge Base articles based on complex investigations.

1-2+ years of experience in B2B technical support, integration support or technical account management. Hands-on experience in payments at a payment gateway, bank or payment orchestration platform. Experience reading JSON, working with APIs in Postman and investigating issues