Senior Backend Engineer – Fiat & Stablecoin Infrastructure
Core
Design, build, and scale core payments systems moving real money across fiat rails (ACH, wires, local payout rails, card networks) and stablecoin networks (USDC, ERC-20, Base) for cross-border transfers between the U.S. and Africa.
Role type
Senior Backend Engineer (Fiat & Stablecoin Infrastructure)
Builds
Core payments infrastructure, ledger-based transaction tracking, secure wallet management, and AI agents for workflow resolutions.
Domain
Fintech, cross-border payments, blockchain/stablecoins
Deliverable
production ML models | product features
Required skills
Fiat payment rail integration, stablecoin/blockchain integration, financial ledger system design, distributed systems, idempotent APIs, transaction state management, AI agent development, AML/KYC compliance implementation, encryption and secure key storage.
Preferred skills
Building 0 to 1 systems, experience at a fintech/neobank/remittance/crypto company, knowledge of FX pricing and spread logic.
Technologies
ACH, wires, NIP, NUBAN, USDC, ERC-20, Base, model agent APIs.
Responsibilities
Design and build reliable systems for fiat on-ramps and off-ramps; Integrate with banking partners, payment processors, and card issuers; Implement ledger-based transaction tracking and reconciliation systems; Integrate with stablecoin rails and build secure wallet management systems; Design double-entry ledger systems and maintain pipelines between internal ledgers and external sources; Implement transaction monitoring hooks, compliance triggers, and rate limits; Build AI agents for workflow resolutions.
Seniority
Senior, hands-on IC
