Front End Developer Jobs in Cambridge, MA

Build mission-critical frontend features for civil aviation: develop fast, maintainable React/TypeScript interfaces, real-time map-based visualizations with Mapbox/Maplibre/Google Maps, and leverage WebGL/WebGPU/ThreeJS and WebAssembly for accelerated rendering and performance.

The Principal Front-End Engineer will enhance the Growth team's platform and infrastructure by developing tools, managing applications, and ensuring a high-quality user experience across projects.

Build and ship a new dealer-facing product across the full stack: develop, test, and deploy high-quality code; maintain and improve core systems; and collaborate with product and data teams from design through measurement.

Develop user interfaces for air traffic systems, focusing on map-based applications and real-time data processing.

As a Frontend Software Engineer, design, develop, and deploy web applications, collaborate with UX engineers, and implement user-friendly interfaces.

The Senior Software Engineer will lead web experience architecture, mentor engineers, manage technical projects, and enhance frontend performance and reliability through data-driven decision making.

The Software Engineer II (Frontend) will design and develop user experiences for WHOOP's digital products, focusing on responsive web applications and collaboration across teams.

As a Software Engineer I on the Growth team, you'll develop and maintain frontend applications, implement experiments, and improve user experiences while collaborating closely with cross-functional teams.

Build and own major surfaces of a Next.js consumer healthcare web app. Implement UI with high polish, performance, and accessibility; make frontend architecture decisions; work with design, backend (Rails/Postgres), and clinical stakeholders; write SQL, debug end-to-end, and own QA to deliver features.

Build and maintain production-grade React+TypeScript web interfaces for data-intensive, real-time AI products. Own end-to-end frontend features, optimize UI performance for large datasets, collaborate with design and backend teams, establish frontend best practices, improve architecture and tooling, and resolve production issues across browsers and devices.

Mark43 seeks an experienced Front-End Engineer to design and implement scalable cloud-based software. Responsibilities include collaborating with product teams, coding with React and Typescript, and improving software architecture.

The role involves designing and developing web applications, integrating with back-end services, and producing high-quality code while mentoring other developers.

Senior front-end developer to build standards-compliant, CSS-based layouts and dynamic JavaScript/AJAX UI. Must have strong HTML/CSS/JS/DOM skills, experience with JS UI libraries (Dojo a plus), and familiarity with eCommerce/retail projects and WCS. Must communicate well, ramp quickly, and work with distributed/offshore teams.

Design and implement pixel-perfect, high-performance web applications from wireframes to production. Collaborate with designers, PMs, and engineers, iterate on architecture and best practices, explore AI/ML integrations, and contribute to a collaborative engineering culture.

Build and optimize frontend signup and activation experiences using modern JavaScript and TypeScript. Collaborate with product, design, and analytics to implement high-converting, accessible, and performant user flows, own features from design through implementation, and participate in experimentation and personalization to improve conversion.

Join the frontend team to design and implement complex, real-time, data-driven web applications using Angular and observables. Collaborate with product and engineering to deliver scalable, reliable cloud-based features, handle asynchronous/streaming data, and contribute frontend business logic. Full-stack and Firebase experience is a plus.

Lead frontend design and implementation for patient and physician products, shape frontend architecture (design systems, state, testing, performance), integrate AI/LLM features with backend/ML teams, and deliver polished, accessible, high-performance interfaces in a hybrid NYC/Boston environment.

Design and build user-facing components for an AI-native cloud platform, ensuring scalability and performance, mentoring engineers, and optimizing web interfaces.

Build and own responsive, high-performance React + TypeScript web applications. Design frontend architecture, reusable components, state management, and data-fetching. Collaborate with product and backend teams, optimize performance and accessibility, and improve developer tooling and workflows. Contribute across the stack when needed.

Design, build, test, and maintain scalable, responsive front-end applications (React/TypeScript). Collaborate with cross-functional teams to implement AI-integrated UIs, optimize performance, and own frontend lifecycle including unit, integration, and end-to-end testing.

Full-Stack Engineer responsible for developing and maintaining front-end and back-end components, collaborating on product solutions, and improving user interfaces.

Design and build web apps for creating and listening to music. Optimize performance, contribute to design decisions, and create libraries for audio experiences.

Lead frontend architecture and platform foundations for real-time operations. Define modular client systems, scalability, reliability, observability, localization, and AI-assisted engineering practices. Mentor senior engineers and partner with product and design to deliver configurable, regionally compliant client experiences at scale.

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.

Senior front-end engineer to build scalable, real-time, data-driven web applications using Angular, TypeScript, RxJS, and WebGL. Collaborate with product and engineering teams, implement complex UIs and asynchronous/streaming data interactions; full-stack knowledge and Firebase/GCP familiarity are a plus.