Senior Frontend Engineer – AI Fintech Wallet (Remote)

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

Benefits offered by this job

Contractor payment in USD

100% remote work

Access to Argentine public holidays

Professional development & observabil­

Job summary

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

You will build top-notch user experiences, turning requirements and UX/UI designs into scalable, production-ready features, while leveraging AI-powered tools to extend your reach across the stack. You will own features end-to-end, collaborate with product/design teams, and contribute to frontend architecture, performance, accessibility, and secure development

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.
• 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.
• Ability to deliver complete features across frontend and backend boundaries.
• Experience with REST APIs, third-party integrations, and BFF architectures.
• Strong understanding of frontend architecture, reusable components, and state management.
• Experience working in Agile product development environments.

Responsibilities

• Design, develop, and maintain high-quality user interfaces for a Digital Wallet.
• Translate UX/UI designs and product requirements into functional, intuitive 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 tools to speed up frontend and full-stack development.
• Build and maintain BFF services that support application requirements.
• Implement API integrations and backend functionality when needed.
• Ensure performance, accessibility, and maintainability across the app.
• Participate in code reviews and improve development practices.
• Explore AI-assisted engineering to simplify workflows.

Skills

React

JavaScript

TypeScript

Fintech experience

UX principles

Figma to code

AI-assisted coding

REST APIs

BFF architecture

Agile

Tools

Cursor

Claude Code

GitHub Copilot

Postman

Job description

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

You will build top-notch user experiences, turning requirements and UX/UI designs into scalable, production-ready features, while leveraging AI-powered tools to extend your reach across the stack. You will own features end-to-end, collaborate with product/design teams, and contribute to frontend architecture, performance, accessibility, and secure development