Senior Ruby Developer

Developer

Remote

September 28, 2026

Application ends: December 27, 2026

REQUIREMENTS

5+ years backend engineering experience (API and integration heavy)
Strong Ruby / Ruby on Rails expertise; production Go experience strongly preferred
Proven experience integrating PSPs or payment gateways
Solid understanding of payment flows, webhooks, and transaction lifecycles
Knowledge of PCI DSS and secure handling of financial data
Experience with reconciliation, idempotency, and error-handling patterns
Experience designing and scaling distributed backend systems
Experience in fintech, payments, or forex/CFD brokerage preferred
Strong attention to reliability, security, and detail

RESPONSIBILITES

Design, build, and own backend services in Ruby (Rails) and Go
Integrate new PSPs (cards, bank transfer, crypto, local methods) into the payment portal
Build and maintain deposit and withdrawal flows end to end
Design and consume PSP APIs, webhooks, and callback handlers
Implement transaction routing, status tracking, and reconciliation logic
Handle payment states, retries, idempotency, and failure/edge-case handling reliably
Ensure secure handling of payment data and compliance (PCI DSS)
Maintain and monitor existing PSP connections; resolve integration issues
Set technical direction, review code, and mentor other engineers
Build reporting and logging for payment operations and troubleshooting
Support anti-fraud, AML, and KYC checks within payment flows