Vacancy details
This is a private vacancy. Company details stay confidential until InVault confirms a serious candidate fit.
- Status
- Active
- Date posted
- 15 September 2026
- Open until
- 14 December 2026
- Employment type
- Contractor
- Location
- Argentina — Buenos Aires
Overview
A confidential technology business is seeking a senior Node.js specialist to work on payment-critical backend services. The role combines hands-on application development with payment processing, reconciliation and ledger reliability in a hybrid Buenos Aires setup.
Requirements
- 7+ years of professional Node.js application development.
- Direct experience with production payment processing or fintech systems.
- Strong understanding of reconciliation and financial ledger concepts, including double-entry principles.
- Clear English communication and availability for the required Buenos Aires hybrid schedule.
- Education requirement: not stated.
Responsibilities
- Build and maintain backend payment features and supporting financial services.
- Design reliable flows for authorization, capture, refunds, voids and chargebacks.
- Strengthen reconciliation, ledger integrity and idempotent distributed operations.
- Collaborate with product and engineering teams on architecture, integrations and production troubleshooting.
Conditions
- Contractor role. Hybrid in Buenos Aires with two specified office days each week. No relocation support is advertised.