Senior Frontend/UX Engineer - AI-Driven Fintech Wallet

Humand Technologies, Inc.; Buenos Aires; Remote; ARS 85,158,000 - 138,382,000; Full time

Benefits offered by this job

Payment in USD

100% remote work

Argentine public holidays

Observability modernization project

Professional development

Job summary

Darwoft is seeking a Senior Frontend / UX Engineer to join a fast-growing U.S. fintech project. This remote LATAM contractor role focuses on building a Digital Wallet with AI-assisted tooling and BFF-backed backend support.

You will turn UX designs into production-ready features, ensure performance and accessibility, and collaborate across product, design, and engineering to deliver end-to-end wallet capabilities.

Qualifications

• Strong hands-on experience with React, JavaScript and TypeScript.
• Experience building fintech apps, digital wallets or payment platforms.
• Ability to deliver features end-to-end across frontend and backend.
• Experience with REST APIs and BFF architectures.
• Experience working in Agile product development environments.

Responsibilities

• Design, develop, and maintain high-quality user interfaces for a Digital Wallet.
• Translate UX/UI designs into functional, responsive applications.
• Collaborate with product and design to improve user journeys and usability.
• Own features end to end from requirements through delivery.
• Use AI-powered tools to speed frontend and full-stack development.
• Build and maintain BFF services that support application needs.

Skills

React

JavaScript

TypeScript

Fintech apps

UX principles

Production UI

REST APIs

Agile

AI-assisted coding

Frontend-Backend

Tools

Cursor

Claude Code

GitHub Copilot

Azure SQL

Job description

Darwoft is seeking a Senior Frontend / UX Engineer to join a fast-growing U.S. fintech project. This remote LATAM contractor role focuses on building a Digital Wallet with AI-assisted tooling and BFF-backed backend support.

You will turn UX designs into production-ready features, ensure performance and accessibility, and collaborate across product, design, and engineering to deliver end-to-end wallet capabilities.