Top Front End Developer Jobs in Boston, MA

Build high-performance, real-time Angular frontends for AI-driven agent workflows. Implement SSE/WebSocket streaming, advanced state management (Signals/NgRx/Akita), interactive visualizations (Canvas/SVG), HITL components, and performance optimizations. Collaborate with backend and AI engineers on JSON schemas and API contracts. Ensure quality via unit and E2E tests (Cypress).

Own end-to-end frontend development for core crypto payment flows across web and mobile. Improve latency, availability, and SLOs; build user-facing features (contacts, real-time transaction status); identify and fix performance bottlenecks; partner with product/design/backend; mentor junior engineers to reduce customer friction at scale.

The Staff Frontend Engineer will develop shared frontend libraries, enhance performance, and manage a design system to improve user experiences.

Lead architecture and development of a high-performance, responsive trading web app using React/Next.js/TypeScript. Own features, optimize performance (mobile-focused), integrate real-time data/WebSockets, maintain clean code, and collaborate with founders and cross-functional teams to drive product decisions.

The Front-End Developer will create user interfaces using Vue.js, optimize application performance, collaborate with teams, and maintain code quality through testing and reviews.

Develop and maintain WordPress websites, create custom themes and plugins, ensure cross-browser compatibility, and optimize for SEO. Provide guidance on user experience and explore new technologies.

The Front-End Engineer will develop and optimize production React applications, collaborating with cross-functional teams to deliver high-quality UIs and maintain component libraries.

Develop user-facing features using Vue.js, collaborate with back-end engineers, optimize performance, maintain code quality, and stay updated on blockchain trends.

You will drive the product's frontend look and feel, build UIs for complex data, ensure consistent designs, and enhance development velocity. This role requires strong React/TypeScript skills, a builder's mindset, and a focus on performance and design sensibility.

Design, build, and optimize high-performance TypeScript and React single-page applications, mentor team members, and advocate modern frontend practices while collaborating with cross-functional teams.

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.

Lead full-stack developer responsible for architecting and delivering end-to-end frontend solutions using React/TypeScript. Oversee a team, build accessible responsive UIs (Section 508/WCAG), integrate REST/GraphQL APIs, implement automated tests and CI/CD, deploy containerized apps, translate user requirements into performant interfaces, and support mission-driven DoD/C2 systems requiring Secret clearance eligibility and Security+ certification.

Build pixel-accurate, accessible, responsive interfaces from Figma using handcrafted CSS/SCSS and modern layout primitives. Implement interactive UI in Vanilla JavaScript and React/Next, integrate front-end with CMSs (Contentful, Drupal, WordPress), use modern build tooling, participate in code reviews, and leverage AI tools to speed debugging and scaffolding.

The Front-End Developer will create and maintain web applications using HTML, CSS, and JavaScript, focusing on automation and software delivery processes.

Build front-end features for Backpack Exchange, optimize performance, and manage projects from start to finish with a focus on React.

As a Front-End Developer Intern, you will design and build web applications, collaborate with teams, participate in code reviews, and maintain code quality.

Build and maintain React/TypeScript UI components, pages, and data visualizations for a security/compliance platform. Extend component library, optimize performance for large datasets, implement real-time updates, collaborate with designers, backend engineers, and customers to ship high-fidelity, production-ready interfaces.

Own and build frontend experiences across Air's web platform: translate product/design needs into high-quality UI, architect and ship features, improve component design and rendering performance, maintain a scalable design system, enforce accessibility and code quality, mentor engineers, and participate in reviews and hiring.

The Frontend Engineer will develop user interfaces utilizing React and other technologies to enhance community knowledge organization and data interaction.

The Frontend Engineer will build user-facing interfaces for AI software development, utilizing technologies like TypeScript and React, while ensuring code quality and user experience.

We are seeking a Senior Frontend Software Engineer to build advanced web applications using JavaScript and ReactJS, collaborating with a team to enhance user experiences.

Build responsive, scalable web applications using Angular, HTML5, CSS3, and JavaScript. Collaborate with designers and backend teams, integrate RESTful APIs, optimize performance, maintain reusable code, participate in Agile ceremonies, and recommend front-end improvements.

Design and implement high-performance Angular frontends for AI-driven interfaces: real-time SSE/WebSocket streaming, complex state with Signals/NgRx, Chain-of-Thought visualizations, human-in-the-loop controls, performance optimization, API schema collaboration, and testing.

Build high-performance, real-time Angular frontends for AI-driven agent interfaces. Implement SSE/WebSockets streaming, complex state management with Signals/NgRx, visualizations of agent chain-of-thought, human-in-the-loop controls, performance optimizations, and collaborate with backend/AI engineers on API schemas.