Backend Engineer (Core Banking & Ledger)

ScopeX moves money across borders and provides cross-border payments and digital wallets.

• Design and maintain atomic, idempotent, fully reconcilable fund-moving flows for payments, payouts, refunds, transfers, and rewards across internal services and external payment partners
• Build and harden integrations with banking, payment, custody, and KYC providers, including secure callback handling, state-machine-driven transaction lifecycles, and automated reconciliation
• Own customer and staff authentication, session management, and a consistent least-privilege permission model across services
• Implement banking-grade controls for back-office operations, including strong step-up authentication, maker-checker approval on sensitive actions, and tamper-evident audit trails
• Improve testing and release quality with concurrency and negative-path tests, CI release gates, and dependency and runtime hygiene
• Write code, tests, and infrastructure definitions

• 5+ Years building core banking, ledger, payment, or wallet systems in a bank, fintech, payment processor, or iGaming platform, covering double-entry accounting, idempotent transfers, and reconciliation
• Production depth in at least two of Go, Node.js/TypeScript, and Python/Django
• Strong MySQL/RDS knowledge, including transactions, locking, constraints, replication semantics, and CDC
• Practical security engineering experience with least privilege, WebAuthn/step-up authentication, and audit-log design
• Experience writing concurrency and failure-path tests, clear design documents, and runbooks