Senior Ruby Developer (Ruby & Go)

📋 Description

• Design, build, maintain, and own backend services using Ruby on Rails and Go, focusing on
• Lead integration of payment service providers and payment methods (cards, bank transfers, crypto
• Build and maintain end-to-end deposit and withdrawal workflows with secure fund movement.
• Design, implement, and consume PSP APIs, webhooks, callbacks, and integration mechanisms.
• Develop transaction routing, status tracking, reconciliation, and payment lifecycle logic.
• Implement robust handling for payment states, retries, idempotency, failures, and edge cases for

🎯 Requirements

• 5+ years backend engineering experience in API-driven and integration-heavy environments.
• Strong professional experience with Ruby and Rails; production-level Go experience strongly
• Proven experience integrating payment service providers/gateways or financial APIs.
• Strong understanding of payment flows, webhooks, callbacks, lifecycles, and states.
• Knowledge of PCI DSS and secure handling of sensitive financial data.
• Hands-on experience with reconciliation, idempotency, retries, error handling for reliable

🎁 Benefits

• Fully remote position.
• Monday–Friday schedule, from 9:00 to 18:00.
• Visa sponsorship.
• Medical insurance starting from the first week.
• Career growth opportunities in a fast-scaling fintech.
• Opportunities to participate in international events, meetups, and business trips to global offices.