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Proxima · 1 month ago

Senior Front-End Engineer

New York, NY

Full-time

Onsite

Senior Level

$150K/yr - $190K/yr

6+ years exp

Proxima is a company focused on transforming the consumer technology landscape with data-driven solutions. The Senior Frontend Engineer will be responsible for building AI-driven products and crafting exceptional user experiences through responsive web applications and intuitive interfaces.

AdvertisingArtificial Intelligence (AI)Digital MarketingMarketing

No H1B

Responsibilities

Build, maintain, and scale frontend applications using TypeScript and React

Design and implement user interfaces for AI agent interactions, data visualizations, and consumer-facing products

Write clean, maintainable, and semantic HTML/CSS/SCSS with a strong eye for design and UX

Create responsive, accessible, and performant web applications that work flawlessly across devices and browsers

Collaborate closely with product and designers to translate mockups and prototypes into production-ready code

Build reusable component libraries and design systems

Optimize frontend performance, including bundle sizes, load times, and runtime efficiency

Work with backend teams to integrate APIs and manage application state effectively

Own frontend architecture decisions and champion best practices across the team

Stay on the cutting edge of modern frontend development, especially around AI-powered user experiences

Qualification

TypeScriptReactWeb performance optimizationCSS/SCSSAI-powered applicationsFrontend toolingUX/UI designAccessibility standardsState management librariesData visualization librariesFrontend testing frameworks

Required

6+ years of professional frontend development experience

Bachelor's degree (or higher) in Computer Science, Engineering, Design, or a related field

Proven experience working in startup environments—you've shipped products fast and worn multiple hats

Expert-level proficiency with TypeScript and React (including hooks, context, and modern patterns), with a strong ability to design maintainable, strongly-typed APIs

Strong command of CSS/SCSS, including Flexbox, Grid, animations, and responsive design techniques

Experience with modern frontend tooling (Webpack, Vite, ESBuild, etc.)

Solid understanding of web performance optimization and browser APIs

Experience building interfaces for AI-powered applications or complex data-driven products

Daily use of AI-assisted coding tools (e.g., GitHub Copilot, Cursor, Claude Code, etc.) is a requirement

Comfortable owning projects independently in a high-velocity development environment