Senior Frontend/UX Engineer - AI-Driven, Remote Contractor

Hiberus; Buenos Aires; Remote; ARS 139,086,000 - 200,903,000; Full time

Benefits offered by this job

Contractor payment in USD

100% remote

Argentine public holidays

Job summary

Darwoft is seeking a Senior Frontend / UX Engineer to join a fintech-focused team building a Digital Wallet. This frontend-first role emphasizes translating UX/UI designs into production-ready features for cross-border payments, with AI-assisted tools to extend the stack, including BFF services and API integrations.

You will own features end-to-end, collaborate with product and design, ensure accessibility and performance, and contribute to frontend architecture while delivering high-quality,

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 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 principles

Production-ready UI

Figma to app

AI-assisted coding

Frontend-Backend delivery

REST APIs

BFF architecture

Frontend architecture

Agile

Communication

Job description

Darwoft is seeking a Senior Frontend / UX Engineer to join a fintech-focused team building a Digital Wallet. This frontend-first role emphasizes translating UX/UI designs into production-ready features for cross-border payments, with AI-assisted tools to extend the stack, including BFF services and API integrations.

You will own features end-to-end, collaborate with product and design, ensure accessibility and performance, and contribute to frontend architecture while delivering high-quality,