Remote Senior Frontend Engineer - Fintech Wallet & AI Tools

CookUnity; Ciudad de Mendoza; Remote; ARS 85,158,000 - 191,605,000; Full time

Benefits offered by this job

Contractor payment in USD

100% remote work

Argentine public holidays

Job summary

Darwoft seeks a Senior Frontend / UX Engineer to join a fast-growing fintech project as a contractor in Latin America. You will build and maintain a Digital Wallet UI, turning Figma designs into production-ready features and leveraging AI-assisted coding to accelerate delivery.

You will collaborate with design and product teams, own features end to end, and ensure high performance, accessibility, and robust testing. This is a full-time contractor role with remote, international flexibility.

Qualifications

• Strong hands-on experience with React, JavaScript, and TypeScript.
• Experience building fintech applications, digital wallets, or payment platforms.
• Solid understanding of UX principles, usability, interaction design, and user-centered development.
• A proven track record of building polished, production-ready user interfaces.
• Experience turning Figma designs into working applications.
• Practical experience with AI-assisted coding tools such as Cursor, Claude Code, GitHub Copilot, or similar.
• Ability to deliver complete features across frontend and backend boundaries.
• Experience with REST APIs, third-party integrations, and Backend for Frontend (BFF) architectures.
• Strong understanding of frontend architecture, reusable components, and state management.
• Experience working in Agile product development environments.
• Strong communication, problem-solving, and independent execution skills.
• Comfort working hands-on with production code.

Responsibilities

• Design, develop, and maintain UI for a Digital Wallet.
• Turn designs into functional, responsive applications.
• Collaborate with product and design teams to improve user journeys and usability.
• Own features end to end, from requirements through 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

UI development

UX principles

Figma designs

AI-assisted coding

REST APIs

BFF architectures

Agile

State management

Code reviews

Production code

Tools

Node.js

GitHub Copilot

Design systems

REST APIs

Job description

Darwoft seeks a Senior Frontend / UX Engineer to join a fast-growing fintech project as a contractor in Latin America. You will build and maintain a Digital Wallet UI, turning Figma designs into production-ready features and leveraging AI-assisted coding to accelerate delivery.

You will collaborate with design and product teams, own features end to end, and ensure high performance, accessibility, and robust testing. This is a full-time contractor role with remote, international flexibility.