Senior Frontend & UX Engineer - AI Wallet (Remote)

Siena Ai; La Pampa; Remote; ARS 120,727,000 - 155,220,000; Full time

Benefits offered by this job

USD payment

100% remote

Argentine holidays access

Professional development

Job summary

Darwoft is seeking a Senior Frontend / UX Engineer to join a US fintech project focused on cross-border payments. You will build a Digital Wallet with a frontend-first approach, turning designs into scalable features while leveraging AI tools to extend your reach across the stack.

The role emphasizes delivering polished interfaces, collaborating with product/design teams, and owning features end to end in a remote LATAM setting.

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, or similar.
• 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, 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

UX principles

AI-assisted coding

REST APIs

Agile

Communication

Frontend architecture

Tools

Cursor

Claude Code

GitHub Copilot

Node.js

Job description

Darwoft is seeking a Senior Frontend / UX Engineer to join a US fintech project focused on cross-border payments. You will build a Digital Wallet with a frontend-first approach, turning designs into scalable features while leveraging AI tools to extend your reach across the stack.

The role emphasizes delivering polished interfaces, collaborating with product/design teams, and owning features end to end in a remote LATAM setting.