Backend / Fullstack Engineer (AI-first) B2B

Role overview

Senior backend/fullstack engineering role responsible for building the systems that support business-to-business financial flows, partners, and high-volume integrations. The work spans complex integrations, contractual workflows, reconciliation between counterparties, and compliance-sensitive processes. An AI-first working style is central to the role, with agents used as a default part of building and operating software.

Responsibilities

- Design and implement backend and fullstack capabilities for B2B payment and partner workflows. - Build reliable integrations with external businesses and operational systems. - Develop processes for reconciling transactions and balances across multiple counterparties. - Support workflows involving contracts, compliance, and high-volume financial activity. - Use AI agents and automation to improve development speed, system operation, and repeatable processes. - Work with stakeholders across the B2B domain to turn complex business requirements into maintainable software.

Requirements

- Senior-level experience in backend/fullstack engineering. - Ability to design systems for integrations, reconciliation, and workflows involving multiple parties. - Comfort working on complex, business-critical domains where correctness and traceability matter. - Experience or strong interest in fintech, payments, crypto, or related financial infrastructure. - An established AI-first engineering workflow that makes practical use of agents.

Benefits and work setup

- Full-time position. - Remote work from Latin America.