Top Front End Developer Jobs

Design, implement, and maintain enterprise-grade front-end applications; collaborate with UX and back-end teams to integrate APIs; optimize performance and accessibility; enforce code quality via testing and reviews; contribute to front-end architecture; mentor junior engineers and share best practices while staying current with emerging front-end technologies.

Owner of the public marketing site: maintain CMS and component library, build landing pages and commerce integrations, optimize performance and analytics, streamline content publishing, and collaborate with Design and Marketing to deliver polished, production web experiences.

Convert designs into a user-friendly, responsive single-page SaaS portal. Maintain and add front-end features, ensure cross-browser/platform compatibility, and collaborate with the development team to deliver clean, accessible UI.

Design, develop, and support web application front-ends and UX using HTML/CSS/JavaScript. Collaborate with clients and teams in Agile environments, perform UX tasks (wireframes, prototypes, usability), ensure responsive cross-browser/device compatibility, mentor peers, and provide design support across projects and corporate communications.

Build intuitive, responsive, and performant web applications for a real-estate decarbonization platform. Translate designs into accessible UIs, handle errors gracefully, write automated tests, collaborate with product and design, and improve frontend code quality and maintainability.

Work directly with CTO, CEO, Product, and Design to build and ship front-end features. Translate designs from prototyping tools into accessible, performant React-based UIs, integrate with APIs, and support internal and client builds.

Design, build, test, and support SEL's public website. Implement and document website components, participate in code reviews and design discussions, collaborate with designers and stakeholders to extend a custom design system, recommend best practices, and contribute to testing and continuous improvement.

Lead frontend architecture and implementation using React and TypeScript. Build scalable component libraries and design systems, optimize performance and accessibility, collaborate on APIs, mentor engineers, and influence product and technical roadmap decisions.

Develop and maintain customer-facing web and mobile features, collaborating with product, design, and backend engineers. Ensure scalable, performant, and maintainable code, write documentation, and perform code reviews while iterating quickly to deliver business impact.

Lead frontend architecture and implementation for an AI-driven platform: build performant, responsive React/TypeScript applications, manage complex state and real-time updates, establish component libraries, testing, CI/CD, mentor junior engineers, and drive frontend best practices and scalability.

Build and maintain responsive, high-performance user-facing React/Next.js applications for privacy-focused web3 products. Collaborate with backend engineers, identify and fix performance bottlenecks, participate across the product lifecycle, write tested production-quality code, and iterate quickly on UX and developer-facing frameworks.

Build and maintain the company website, client-facing portal, and internal web apps. Design and structure web pages, implement UI enhancements, optimize performance and scalability, collaborate with backend engineers (Go), ensure brand-consistent design, and mentor teammates to drive product excellence.

Build and optimize a canvas-based browser app ingesting and visualizing large data streams. Architect data pipelines, rendering loops, and memory-constrained solutions. Implement performance-critical UI using TypeScript, Canvas/WebGL/DOM, low-level web APIs, workers, and potentially WebAssembly. Measure and tune rendering, memory, and responsiveness.

Build and evolve a scalable React-based web UI for a fleet management platform. Migrate legacy components, design reusable front-end architectures, integrate with REST APIs, and create interactive data visualizations. Collaborate with stakeholders, backend engineers, and designers to deliver performant, test-covered user experiences.

Build and maintain a shared frontend platform and design-to-production pipeline: application shell, data layer, routing, auth, component library, agent-driven code generation, observability, and packaging so product teams ship without hand-writing frontend code.

Build and enhance LangSmith frontend features: implement user-facing UI with React and TypeScript, create reusable components, translate designs into high-quality code, optimize performance, and collaborate with backend engineers and designers to improve observability and evaluation workflows for LLM applications.

Design and build data-driven front-end interfaces and user flows, partner with product and data science teams to implement solutions, develop data dashboards (Power BI), and iterate based on customer feedback.

Senior Front-End UI Developer (onsite in San Ramon) focused on UI development and test automation. Key responsibilities include working with Java, Selenium-driven automation, RESTful web services and API testing to deliver and validate front-end solutions on a 12-month contract.

Develop and maintain UI/front-end features using HTML5, CSS, AJAX, jQuery, and AngularJS. Integrate with Java/J2EE back-end systems (Spring, Hibernate). Work on front-end implementation, debugging, and cross-team coordination for a 6+ month engagement in New York.

Develop and maintain world-class web applications using React.js and Node.js. Build web services (REST), apply software engineering fundamentals, and use unit testing, TDD, functional testing, and performance practices.

Design and implement high-quality, performant frontend interfaces for a complex enterprise system. Translate product and design specs into production-grade React/TypeScript UI, integrate with backend APIs, contribute to architecture and design system, and ensure performance, accessibility, and security across multiple user personas and permission levels.

Design, develop, configure, test, and deploy front-end web applications using TypeScript/JavaScript and frameworks like Angular or React. Collaborate with analysts, PMs, and clients, participate in code/design reviews, write documentation and runbooks, build monitoring/automation tools, and support application infrastructure, deployments, and performance improvements.

Founding-team senior engineer to architect and build core platform components. Work with CEO/CTO to develop scalable distributed backend systems and frontend using React, Node.js and TypeScript. Implement solid coding practices, testing, CI/CD, and agile workflows while iterating rapidly in an early-stage fintech startup.

Own and evolve the front-end architecture for a high-throughput, real-time trading app using Next.js, React, and TypeScript. Build pixel-accurate, accessible, responsive UIs under strict performance budgets; optimize rendering, state management, data flow, and bundle size for sub-second interactions. Integrate with REST and WebSocket APIs, lead end-to-end feature development, set engineering standards, mentor engineers, and contribute across the stack when needed.

Design, build, and maintain high-performance Next.js + TypeScript front-end applications. Implement responsive, accessible UIs, optimize rendering and bundle size, integrate with REST and WebSocket APIs, contribute to back-end work as needed, uphold testing and documentation standards, and mentor junior engineers.