Senior Frontend Engineer - AI-Powered Fintech Wallet

Scaleup; Ciudad de Mendoza; Remote; ARS 103,687,000 - 155,530,000; Full time

Benefits offered by this job

USD payment in contractor agreement

100% remote work

Argentine holidays access

Observability modernization project

Professional development & referrals

Job summary

Darwoft is seeking a Senior Frontend / UX Engineer to join a fast-growing U.S. fintech company focused on cross-border payments. This frontend-first role emphasizes building production-ready wallet features and coordinating with design and product teams.

You will own features end-to-end, apply AI-assisted tooling, and work in a fully remote LATAM setup with an Independent Contractor agreement paid in USD. Strong React/JS/TS, fintech experience, and a user-centered mindset are required.

Qualifications

• Strong hands-on experience with React, JavaScript, and TypeScript.
• Experience building fintech applications, digital wallets, or payment platforms.
• UX principles and user-centered development.
• Production-ready UI track record.
• AI-assisted coding tools experience.
• REST APIs and BFF architectures knowledge.
• Agile product development experience.

Responsibilities

• Design, develop, and maintain high-quality user interfaces for a Digital Wallet.
• Translate UX/UI designs and product requirements into functional, intuitive, and responsive applications.
• Collaborate with product and design teams to improve user journeys, interactions, and overall usability.
• Own features end to end, from initial requirements through implementation and delivery.
• Use AI-powered development tools to speed up frontend and full-stack development.
• Build and maintain Backend for Frontend (BFF) services that support application requirements.
• Implement API integrations and supporting backend functionality when needed.
• Ensure consistency, performance, accessibility, and maintainability across the application.
• Take part in code reviews and help improve development practices.
• Find ways to simplify development workflows through AI-assisted engineering.

Skills

React

JavaScript

TypeScript

Fintech experience

UX design

UI testing

Agile

Tools

Cursor AI tools

GitHub Copilot

REST APIs

BFF architectures

Job description

Darwoft is seeking a Senior Frontend / UX Engineer to join a fast-growing U.S. fintech company focused on cross-border payments. This frontend-first role emphasizes building production-ready wallet features and coordinating with design and product teams.

You will own features end-to-end, apply AI-assisted tooling, and work in a fully remote LATAM setup with an Independent Contractor agreement paid in USD. Strong React/JS/TS, fintech experience, and a user-centered mindset are required.