Senior Frontend Engineer (React.js) Remote + Flexible Hours

Remote; San Francisco (CA); Remote; USD 120,000 - 170,000; Full time

Benefits offered by this job

On-time payments

Flexible hours

24 flex days off

Remote work

Job summary

Proxify is seeking a Senior Frontend Developer (React.js) to lead architecture, optimization, and scaling of client web applications. You will transform designs into interactive, modular experiences and work with cross-functional teams.

The role requires 5+ years of engineering, deep React/TypeScript experience, SSR/SSG, and a focus on performance, accessibility, and testing. This is a fully remote, long-term opportunity with competitive compensation.

Qualifications

• 5+ years of professional engineering experience, with 3+ years focused deeply on building scale-ready applications with React.js and TypeScript.
• Expert-level understanding of state management ecosystems, knowing exactly when to utilize global tools (Redux Toolkit, Zustand) versus server-cache managers (React Query/TanStack Query) and native Context.
• Deep familiarity with modern React frameworks, specifically Next.js, including a strong functional understanding of Server-Side Rendering (SSR), Static Site Generation (SSG), and React Server Components (RSC).
• Proven track record of identifying and fixing web performance bottlenecks—handling layout shifts (CLS), minimizing bundle sizes via code-splitting, optimizing re-renders, and mastering Core Web Vitals.
• A strong commitment to automated testing, utilizing tools like Jest, React Testing Library, and Cypress/Playwright to maintain high regression confidence.
• Exceptional eye for UI polish and layout implementation, with a solid commitment to semantic HTML and web accessibility standards (WCAG/ARIA).

Responsibilities

• Design and develop scalable, reusable, and secure component architectures and custom React hooks that accelerate overall development speed.
• Audit and refactor legacy code blocks to optimize Core Web Vitals, payload sizes, and client-side rendering pipelines.
• Interface directly with Backend and Product teams to define clean REST or GraphQL API schemas, ensuring efficient data orchestration.
• Lead by example through rigorous code reviews, driving typing standards, linting rules, and design pattern uniformity across the team.
• Act as an internal sounding board for modern frontend tooling, assisting junior and mid-level developers in refining their React and engineering skills.

Skills

React.js

TypeScript

Redux Toolkit

Zustand

Next.js

SSR/SSG/RSC

Performance optimization

Jest

Cypress/Playwright

WCAG/ARIA

Tools

React Query

TanStack Query

Tailwind CSS

CSS Modules

Turborepo

Nx

Job description

Proxify is seeking a Senior Frontend Developer (React.js) to lead architecture, optimization, and scaling of client web applications. You will transform designs into interactive, modular experiences and work with cross-functional teams.

The role requires 5+ years of engineering, deep React/TypeScript experience, SSR/SSG, and a focus on performance, accessibility, and testing. This is a fully remote, long-term opportunity with competitive compensation.