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 end-to-end deposit and withdrawal workflows with secure funds movement.
• Design, implement, and consume PSP APIs, webhooks, callbacks, and related integrations.
• Develop transaction routing, status tracking, reconciliation, and payment lifecycle logic.
• Implement robust handling for payment states, retries, idempotency, failures, and edge cases.

🎯 Requirements

• 5+ years backend engineering, API-driven and integration-heavy environments.
• Strong experience with Ruby and Ruby on Rails; production-level Go experience preferred.
• Proven experience integrating payment service providers and financial APIs.
• Understanding of payment flows, webhooks, callbacks, lifecycle and states.
• Knowledge of PCI DSS and secure handling of financial data.
• Experience with reconciliation, idempotency, retries, error handling; scalable distributed backends.

🎁 Benefits

• Fully remote position.
• Visa sponsorship.
• Medical insurance starting from first week.
• Career growth opportunities within a fast-scaling fintech.
• Opportunities to participate in international events and travel to global offices.
• Exposure to international payment technologies and high-scale backend systems.