Senior Frontend & UX Engineer - AI-Driven Fintech (Remote)

Sercanto Srl; Ciudad de Mendoza; Remote; ARS 103,480,000 - 155,220,000; Full time

Benefits offered by this job

Contractor agreement (USD)

100% remote

Argentine public holidays access

Job summary

Darwoft is seeking a Senior Frontend / UX Engineer to join a fast-growing U.S. fintech company building a Digital Wallet for cross-border payments.

This frontend-first role focuses on turning requirements and UX/UI designs into intuitive, scalable wallet features, using AI tools to extend capabilities across the stack. You will own features end to end, collaborate with product and design, and contribute to BFF services and backend integrations as needed.

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 or equivalent UX/UI specifications 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, 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 requirements.
• Implement API integrations and supporting backend functionality when needed.
• Ensure consistency, performance, accessibility, and maintainability across the app.
• Participate in code reviews and improve development practices.
• Find ways to simplify development workflows through AI-assisted engineering.

Skills

React

JavaScript

TypeScript

Fintech applications

UX principles

Production-ready UI

Figma to UI

AI-assisted coding

REST APIs

Agile

Tools

Cursor

Claude Code

GitHub Copilot

BFF architectures

API integrations

Job description

Darwoft is seeking a Senior Frontend / UX Engineer to join a fast-growing U.S. fintech company building a Digital Wallet for cross-border payments.

This frontend-first role focuses on turning requirements and UX/UI designs into intuitive, scalable wallet features, using AI tools to extend capabilities across the stack. You will own features end to end, collaborate with product and design, and contribute to BFF services and backend integrations as needed.