Top Front End Developer Jobs

The role involves developing and maintaining trading user interfaces, enhancing performance of C# components, and adapting to project changes while collaborating with teams.

As a Senior Software Engineer, you'll lead the frontend development of SkyNav, creating intuitive interfaces for mission planning while collaborating with various teams to enhance user experience and system performance.

Build polished, performant frontend interfaces for audio-data products. Ship production-grade UI features, surface LLM/DSP-driven insights, iterate with researchers and operations, and scale interfaces for thousands of users.

Develop and enhance user-facing features for an LLM observability platform using React and TypeScript. Build reusable components and front-end libraries, translate designs into performant UI code, optimize cross-device/browser performance, and collaborate with backend engineers and designers to improve usability.

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.

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.

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.

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 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 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.

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.

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.

Lead design and implementation of scalable, performant frontend architectures and reusable UI components for consumer apps. Own core user journeys, optimize performance and accessibility, set frontend standards, mentor engineers, drive architectural decisions, and use AI-first tooling to ship features at scale.

As a visualization front end engineer, you will develop engaging web applications and data visualizations using advanced JavaScript and frameworks, collaborate with teams, and optimize user experience.

As a Senior Frontend Engineer, you'll build and maintain a fraud prevention platform UI using ReactJS, collaborating with backend teams and ensuring code quality through tests and CI/CD processes.