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

Fullstack; La Pampa; Remote; ARS 155,220,000 - 224,207,000; Full time

Benefits offered by this job

Contractor paid in USD

100% remote across international teams

Argentina holidays access

Observability modernization project

Professional development & referrals

Job summary

Darwoft is seeking a Senior Frontend / UX Engineer to join a US fintech project focused on a Digital Wallet for cross-border payments. The role emphasizes frontend-first development, transforming UX/UI designs into scalable features, and leveraging AI-assisted tools to extend the stack.

You will work remotely across LATAM with an emphasis on delivering polished, production-ready interfaces. You will collaborate with product/design teams, own features end-to-end, and contribute to architecture,

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.
• 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/Payments

UX Principles

Production-ready UI

Figma Designs

AI-assisted coding tools

REST APIs & BFF

Frontend Architecture

Agile

Communication & Delivery

Production code

React Native (Nice-to-have)

Node.js (Nice-to-have)

Design Systems (Nice-to-have)

Auth/Security (Nice-to-have)

AI-driven development (Nice-to-have)

Mobile-first & Performance (Nice-to-h

Tools

Cursor

Claude Code

GitHub Copilot

REST Client Tools

Node.js

Job description

Darwoft is seeking a Senior Frontend / UX Engineer to join a US fintech project focused on a Digital Wallet for cross-border payments. The role emphasizes frontend-first development, transforming UX/UI designs into scalable features, and leveraging AI-assisted tools to extend the stack.

You will work remotely across LATAM with an emphasis on delivering polished, production-ready interfaces. You will collaborate with product/design teams, own features end-to-end, and contribute to architecture,