Remote Senior Frontend Engineer — AI-Driven Fintech Wallet

Fullstack; Rosario; Remote; ARS 86,234,000 - 155,220,000; Full time

Benefits offered by this job

Contractor agreement with USD payment

100% remote work

Access to Argentine public holidays

Professional development & referrals

Job summary

Darwoft is hiring a Senior Frontend / UX Engineer to join a fast-growing U.S. fintech project focused on a cross-border Digital Wallet for Latin America.

This remote, contractor role emphasizes frontend-first work, translating UX/UI and product requirements into scalable wallet features with AI-assisted tooling. You will drive user experiences, design robust interfaces, and contribute across frontend and backend boundaries.

Qualifications

• Strong hands-on experience with React, JavaScript, and TypeScript.
• Experience building fintech apps, digital wallets, or payment platforms.
• Solid understanding of UX principles, usability, interaction design, and user-centered development.
• Proven track record of production-ready user interfaces.
• Experience turning Figma designs into working apps.
• Experience with AI-assisted coding tools.
• Ability to deliver complete features across frontend and backend boundaries.
• Experience with REST APIs, third-party integrations, and BFF architectures.
• Strong frontend architecture, reusable components, and state management.
• Experience in Agile product development.

Responsibilities

• Design, develop, and maintain high-quality UIs for a Digital Wallet.
• Translate UX designs and requirements into functional, responsive apps.
• Collaborate with product and design to improve user journeys and usability.
• Own features end to end from requirements to delivery.
• Use AI-powered tools to speed up frontend and full-stack work.
• Build and maintain BFF services supporting app needs.
• Implement API integrations and supporting backend functionality.
• Ensure performance, accessibility, and maintainability across the app.
• Participate in code reviews and improve development practices.
• Explore AI-assisted workflows to simplify development.

Skills

React

JavaScript

TypeScript

Fintech apps

UX principles

UI design

AI tooling

REST APIs

BFF

Agile

Independent work

Communication

Job description

Darwoft is hiring a Senior Frontend / UX Engineer to join a fast-growing U.S. fintech project focused on a cross-border Digital Wallet for Latin America.

This remote, contractor role emphasizes frontend-first work, translating UX/UI and product requirements into scalable wallet features with AI-assisted tooling. You will drive user experiences, design robust interfaces, and contribute across frontend and backend boundaries.