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

Nimble Gravity, Llc; Rosario; Remote; ARS 120,727,000 - 224,207,000; Full time

Benefits offered by this job

Contractor payment in USD

100% remote work in international team

Argentine public holidays access

Observability modernization project

Job summary

Darwoft seeks a Senior Frontend / UX Engineer to join a fast-growing U.S. fintech initiative focused on a Digital Wallet for cross-border payments.

You will craft exceptional user experiences, translate UX/UI designs into scalable features, and leverage AI-powered tools to extend your reach across the stack. You will own features end to end, collaborating with product and design teams, and balancing user experience with technical quality and delivery speed.

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 and state management.
• Experience working in Agile product development environments.
• Strong communication 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 and usability.
• Own features end to end from requirements to delivery.
• Use AI-powered tools to speed up frontend and full-stack development.
• Build and maintain BFF services to support application requirements.
• Implement API integrations and supporting 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

UX principles

Production-grade UI

Tools

Cursor

Claude Code

GitHub Copilot

REST APIs

Job description

Darwoft seeks a Senior Frontend / UX Engineer to join a fast-growing U.S. fintech initiative focused on a Digital Wallet for cross-border payments.

You will craft exceptional user experiences, translate UX/UI designs into scalable features, and leverage AI-powered tools to extend your reach across the stack. You will own features end to end, collaborating with product and design teams, and balancing user experience with technical quality and delivery speed.