Top Front End Developer Jobs in Boston, MA

Build and maintain responsive, accessible web interfaces using React, HTML, CSS, and JavaScript/TypeScript. Integrate applications with REST APIs and back-end services, implement WebSocket features, optimize Core Web Vitals, and develop reusable design-system components. The role also involves Node.js tooling, cross-browser compatibility, code reviews, QA collaboration, and front-end testing.

Build and ship healthcare software across the frontend, API, and database using React, TypeScript, Next.js, tRPC, Prisma, and related technologies. Own features end to end, prototype with AI tools, test with patients and care teams, and improve performance, accessibility, reliability, and scalability. Collaborate closely with company leadership in a fast-paced startup environment while developing trustworthy automation for healthcare delivery.

Develop and maintain responsive frontend interfaces, dashboards, reports, and enterprise web applications. Translate requirements into functional user interfaces, build UI and automated tests, troubleshoot and optimize performance, implement REST API integrations and routing, and collaborate with backend developers and testers. The role requires React, JavaScript, Redux, Node.js, and related frontend technologies, with preferred experience in dashboards, reporting, testing, AWS, and government applications.

Build and maintain responsive, accessible front-end interfaces using React, React Native, HTML, CSS, and Shopify. Apply UX/UI principles, collaborate with designers and multidisciplinary teams, provide clear technical feedback, and independently deliver high-quality work on complex technology or AI-related projects. Contractors complete output-based tasks and must meet weekly minimum submission requirements, with an expected start within 24–48 hours of onboarding.

Design and build user-facing features for a live video chat and multiplayer gaming platform. Collaborate with designers and product managers, lead technical quality and scalability efforts, rapidly experiment, and solve customer problems through deep user understanding. The role focuses on front-end architecture using TypeScript and React, with Node.js proficiency and strong CSS fundamentals.

Lead frontend feature releases and own user experience, performance, testing, and production health for a React and TypeScript dental practice management platform. Collaborate with backend engineers using Java Spring Boot, develop AI-powered interfaces, integrate AI tools such as Claude, participate in code reviews, improve team efficiency, and estimate development work for timely delivery.

Develop and maintain responsive Angular web applications using Angular 19+, Signals, Reactive Forms, and modular component architecture. Build complex forms, integrate REST APIs with RxJS, optimize change detection and performance, and create unit tests with Vitest or Jest. Collaborate with design, backend, and product teams, troubleshoot cross-browser issues, participate in code reviews, and follow modern front-end development practices.

Design, develop, and enhance custom SAP Fiori/UI5 applications; configure Fiori Launchpad; integrate OData services; perform UI debugging, performance optimization, code reviews, unit testing, and documentation while collaborating with backend and functional teams.

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.

Design, build, and optimize responsive, high-performance front-end interfaces for a Web3 DEX using modern JavaScript frameworks and TypeScript. Collaborate with designers, product, and back-end teams to integrate blockchain APIs and smart contracts, mentor junior developers, troubleshoot issues, and contribute to mobile-first/PWA development while ensuring scalability and maintainability.

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.

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.

Build and own frontend applications for DeFi products using Next.js and TypeScript. Develop reusable component libraries and design systems, integrate Solana programs and wallet infrastructure, and translate complex financial concepts into accessible interfaces. Own performance, reliability, observability, testing, analytics, and end-to-end feature delivery while collaborating with protocol engineers, designers, and product teams.

Architect and build a high-performance trading platform for active traders. Develop responsive web interfaces integrating real-time market data, low-latency execution workflows, and advanced trading tools. Collaborate with cross-functional engineering teams on large-scale initiatives, emphasizing scalability, performance, API quality, maintainability, developer experience, and end-user usability.

Lead the evolution of Seeq’s frontend infrastructure, including React systems, component libraries, state management, styling architecture, and reusable application patterns. Drive large-scale refactors, improve developer experience, ensure accessibility and performance, evaluate open-source tools, and establish technical standards adopted across teams. Collaborate with designers, product teams, and engineers through architecture reviews, documentation, code reviews, mentoring, and cross-team delivery.

Build and ship frontend features for a financial marketplace using React and Next.js. Collaborate with product, design, and backend engineers; contribute to architecture, component design, code quality, tooling, and the shared component library. Own work from design through delivery, participate in pairing and code reviews, and use AI-assisted development tools thoughtfully.

Lead frontend engineering for large-scale React web applications. Architect application patterns, structure, libraries, and coding standards; build React applications end to end; conduct code reviews; mentor engineers; promote performance, scalability, and maintainability; and collaborate with designers, product managers, and technical and non-technical stakeholders.

Lead front-end engineering for enterprise transportation applications using React, TypeScript, and Material UI. Responsibilities include front-end architecture, reusable component development, accessibility, responsive design, API integration, SQL troubleshooting, testing, CI/CD, code reviews, mentoring, Agile planning, modernization, and production support. The role independently leads features from requirements through deployment while collaborating with designers, product owners, analysts, engineers, testers, DevSecOps teams, and government stakeholders.

Build the realtime, HIPAA-compliant messaging and collaboration frontend ('Pulse') that makes an AI colleague feel human. Implement complex interactive data visualizations, micro-interactions, and high-performance accessible interfaces. Work embedded with product and design, own UI quality, iterate on AI-driven specs, and deliver production frontend experiences clinicians will trust.

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, build, deploy, and maintain secure, scalable Java and Spring Boot services for a multi-tenant ecommerce SaaS platform. Develop REST APIs, optimize MySQL databases, operate AWS workloads, and support CI/CD, observability, testing, and production systems. Contribute to architecture and technical decisions, mentor engineers, troubleshoot issues, and participate in on-call support while ensuring PCI DSS compliance and responsible use of AI-assisted development tools.

Build and scale a consumer healthcare web application using Next.js, React, and TypeScript. Own major product surfaces including search, scheduling, provider profiles, and checkout while ensuring strong performance, accessibility, UI quality, and cross-browser compatibility. Collaborate with design, operations, and clinical stakeholders; make frontend architecture decisions; work with Rails APIs and Postgres; write SQL, product requirements, tests, and QA; and deliver features across the stack.

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 polished, responsive front-end applications for Chiri Brain and client-specific AI solutions. Design user flows, prototypes, interfaces, reusable components, and design systems while integrating APIs, authentication, business data, agent workflows, and security controls. Work directly with customers and stakeholders to understand needs, rapidly prototype, gather feedback, and ship production-quality software. Help establish scalable front-end architecture and use AI-assisted development tools to accelerate delivery.

Senior Front End Software Engineer responsible for architecting, building, and maintaining high-performance applications across frontend, backend, cloud, and event-driven systems. The role leads complex technical initiatives, integrates AI and data pipelines, ensures software quality through testing and reviews, owns applications throughout their lifecycle, documents architecture, collaborates cross-functionally, and mentors engineers. Primary technologies include TypeScript, JavaScript, React, Node.js, AWS, and modern CI/CD and containerization practices.