Senior Ruby Developer (Ruby & Go)

📋 Description

• Design, build, maintain, and own backend services using Ruby on Rails and Go, with a focus on
• Lead integration of new payment service providers and payment methods (cards, bank transfers
• Build and maintain end-to-end deposit and withdrawal workflows for 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 states, retries, idempotency, failures, and edge cases for reliable

🎯 Requirements

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

🎁 Benefits

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