Senior React.js Frontend Engineer

Proxify; United States; Remote; USD 120,000 - 180,000; Full time

Job summary

Proxify, a Swedish tech company, connects skilled developers with long-term remote opportunities at top firms worldwide, including the USA. We’re seeking a Senior Software Engineer with strong React experience to join our Network and help build modern web apps across platforms.

You will collaborate with cross-functional teams, create reusable components, and ensure high-quality code with robust testing. This role requires5+ years of React experience and fluency in English, with remote work

Qualifications

• 5+ years of production-level experience with React.js.
• Experience with state management libraries (Redux, Zustand, Recoil).
• Familiarity with modern build tools like Webpack, Vite, or equivalent.
• Strong understanding of RESTful APIs and frontend-backend integration.
• Experience with unit and integration testing (Jest, React Testing Library).
• Good English communication and ability to work in an agile environment.

Responsibilities

• Build and develop modern, high-performance web applications using React and the latest frontend technologies.
• Collaborate with product managers, designers, and backend developers to deliver value.
• Design reusable components and contribute to frontend architecture.
• Write clean, maintainable, and well-tested code following best practices.
• Identify and fix bugs while continuously improving user experience.
• Work across platforms to deliver consistent UI across devices.

Skills

English communication

Agile work style

Tools

React.js

Redux

Zustand

Recoil

Webpack

Vite

REST APIs

Jest

React Testing Library

TypeScript

Next.js

CI/CD

Job description

At Proxify, a Swedish tech company, we connect talented tech professionals with long-term remote opportunities at top companies across the USA, Sweden, Germany, the Netherlands, and beyond.

Since 2018, we’ve helped 5,000+ developers land remote roles with 1,200+ companies worldwide.

Role overview

We are looking for Senior Software Engineers with strong React experience to join our fast-growing Network. You will play a key role in building modern web applications, collaborating with cross-functional teams, and helping shape the future of user experiences across various platforms.

Important: You must be based in Latam to be considered for this position.

Key responsibilities

• Build and develop modern, high-performance web applications using React and the latest frontend technologies.
• Create fast, responsive, and user-friendly interfaces that work seamlessly across all devices.
• Design reusable components and help shape the frontend architecture.
• Write clean, maintainable, and well-tested code following best practices.
• Identify and fix bugs while continuously improving the user experience.
• Work closely with designers, product managers, and backend developers to bring ideas to life.

Must-have

• 5+ years of demonstrable, production-level experience architecting and developing applications with React.js and its surrounding ecosystem of libraries and tools
• Experience with state management libraries (e.g., Redux, Zustand, Recoil) and understanding of their trade-offs
• Familiarity with modern build tools like Webpack, Vite, or equivalent
• Strong understanding of RESTful APIs, asynchronous operations, and frontend-backend integration
• Experience with unit and integration testing (e.g., Jest, React Testing Library)
• Good English communication skills and the ability to work in an agile environment

Nice-to-have

• Familiarity with server-side rendering frameworks like Next.js or similar
• Hands-on experience with TypeScript and building modular, reusable components using design systems, component libraries, and scalable UI patterns
• Understanding of CI/CD pipelines and deployment workflows
• 100% remote opportunities.
• Work with top international companies.
• Flexible part-time or full-time setup.