Top Front End Developer Jobs in Los Angeles, CA

Build and ship consumer-facing web applications and features using React, Next.js, and TypeScript. Integrate front-ends with back-end APIs, extend a custom AI development harness, collaborate with product and design, and participate in the full development lifecycle on high-traffic sites.

Architect and build a high-performance, low-latency trading web platform. Integrate real-time market data and execution workflows, collaborate cross-functionally on large initiatives, and deliver scalable, performant, user-focused frontend applications with strong attention to API design, tooling, and developer experience.

Design and build scalable, performant frontend systems and mobile apps using React, TypeScript, and React Native. Integrate with GraphQL and real-time streams, lead code reviews, mentor engineers, collaborate with product and design, and optimize performance for mobile and variable network conditions in healthcare contexts.

Lead the development of front-end architecture for spacecraft modeling software, drive cross-functional initiatives, mentor engineers, and influence product strategy.

Develop high-quality front end .NET desktop applications, improve GUIs, and collaborate with QA and product managers on technical issues.

Lead architecture and delivery of large-scale React and React Native frontends. Define frontend strategy and best practices, build shared component libraries and design systems, optimize performance and accessibility, collaborate with product/design/backend teams, mentor junior engineers, and resolve complex frontend and cross-stack issues.

As a Senior Frontend Engineer, you'll develop responsive web UIs, collaborate with teams, maintain the design system, and improve code quality.

The Senior Angular Frontend Developer will create scalable UIs, implement features, and optimize performance in a collaborative environment, focusing on high-quality software delivery.

Lead frontend-leaning full-stack implementation work for carrier and enterprise integrations: architect reusable UI and API layers, author RFCs, guide technical delivery, enforce testing and security best practices, and partner with cross-functional teams to scope and ship production integrations.

The Sr. Software Engineer, Front End will develop 2D and 3D frontend features, drive architectural direction, mentor junior engineers, and address technical debt under high accountability in a complex simulation environment.

This role involves leading web platform initiatives, mentoring senior engineers, architecting web applications, and implementing technical strategies for improved performance.

Volunteer Principal Front End Developer to build React/React Native web and mobile features, mentor engineers, implement scalable full‑stack solutions, ensure cross‑browser compatibility and testing, work with Node/MongoDB/AWS, attend weekly standups, and support a fundraising launch. Minimum 4 hours/week commitment.

The Sr/Staff Frontend Engineer will develop new web applications, enhance UI experiences, architect solutions, and collaborate with various stakeholders to ensure a scalable and secure platform.

Develop modern web applications focusing on UI components using React while ensuring performance, accessibility, and cross-browser compatibility.

The Frontend Engineer will develop high-performance trading UIs for a decentralized exchange platform, manage state across various blockchains, and implement reliable transaction handling features.

The role involves designing and building internal web applications for Nebius, focusing on automating data center operations and developing user interfaces for infrastructure management.

Contract frontend engineer to build and maintain a Sanity-backed Next.js order page platform. Responsibilities include component development, Sanity Studio schema work, end-to-end test ownership (Playwright or similar), routing and architecture improvements, performance optimization, and supporting A/B testing and monitoring. Work closely with marketing, product, and engineering on a high-traffic, revenue-critical purchase flow and participate in on-call and CI/CD processes.

Build, test, and optimize responsive web applications using Next.js and React. Collaborate with designers and back-end developers, implement UI/UX designs, write clean maintainable code, and debug front-end issues to ensure high performance across devices and browsers.

3-month contract Frontend Engineer to build client-facing UIs and integrations for cybersecurity use cases. Collaborate with product, design, and engineering to deliver secure, performant, scalable features, maintain component libraries and automated tests. Remote (GMT+8) role focused on TypeScript and modern web tooling.

Build and maintain responsive, accessible React/NextJS web interfaces and support Chrome extension development (Manifest V3). Integrate with backend APIs or WebSockets, optimize performance, write tests, perform code reviews, monitor and document extension and web app behavior, and collaborate with cross-functional teams.

Design, build, and deliver front-end features with strong UX focus. Own technical design, coding, testing, deployment, and monitoring in a continuous delivery, microservices environment. Collaborate with Product, implement automated QA practices, and contribute to production deployments while practicing robust testing methodologies.

Design and build a scalable, responsive UI; lead frontend architecture and optimization; apply UI/UX best practices; integrate with backend APIs; ensure high web performance and deploy user-facing features.

Build and maintain responsive web applications with React, collaborating with designers, backend engineers, and product. Implement features, integrate REST/GraphQL APIs, optimize performance and accessibility, debug issues, participate in code reviews, and follow frontend best practices.

Develop innovative UI and web systems, managing project priorities and deadlines while working within a collaborative team environment.

The Frontend Engineer will collaborate with design and product teams to create responsive user interfaces, write maintainable code, and optimize performance for a financial platform.