Frontend Engineer

Resilientco

Argentina Remote contract

Posted: April 24, 2026

Required Skills

Job Description

Our client, a leading payments and digital wallet company, is seeking a Senior Web Front-End Engineer to help build and refine one of the top send-money experiences worldwide. This role focuses on solving complex front-end challenges and delivering secure, performant features for web-based monetary transactions.

You will work with React-based web applications, contribute across the stack when needed, and help ensure high-quality releases through testing and effective debugging. This is an opportunity to impact how people move money globally and to work on technically challenging, user-facing features.

Responsibilities:
• Design and develop user-facing features in a React web application.

• Build and maintain unit and functional tests using Jest and React Testing Library.

• Debug client-side issues and trace logs across the browser and application stack.

• Collaborate with engineers to support quality assurance and production releases.

• Contribute across the full stack with basic NodeJS/Express work as required.

• Review code and provide constructive feedback to improve reliability and maintainability.

• Troubleshoot cross-component integration issues and follow stack traces to root causes.

Must Have:
• 5+ years of hands-on professional JavaScript experience.

• Solid experience using React.

• Experience writing unit and functional tests for web applications with Jest, React Testing Library, or similar.

• Practical understanding of NodeJS and Express and the ability to work fullstack on web applications.

• Strong client-side debugging skills and the ability to follow stack traces across the web application.

• Ability to work independently and collaborate effectively with engineering teams.

• Experience supporting quality assurance and release processes.

• The role requires working on PST hours. The official shift is 12 PM to 8 PM GMT-3 (Argentina/Brasilia Time),

Nice to Have:
• Knowledge of cross-browser and platform constraints and familiarity with CSS.

• Familiarity with React Hooks.

• Familiarity with Apollo GraphQL.

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