Top Front End Developer Jobs in Boston, MA

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.

Develop and maintain scalable Java and Spring Boot REST services, APIs, and microservices for mission-critical geospatial systems. Support containerization, orchestration, CI/CD, DevOps automation, testing, infrastructure deployment, data platforms, and third-party integrations. Contribute to architecture, performance optimization, troubleshooting, documentation, stakeholder demos, and Agile delivery. The role requires onsite work in Herndon, Virginia and collaboration on national security missions.

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.

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.

Leads frontend software development across strategic product domains, designing and building dashboards, notifications, reporting interfaces, and intelligent automation. Independently drives complex technical projects, integrates AI models and data pipelines, improves performance, writes automated tests, conducts code reviews, documents architectures, owns applications throughout their lifecycle, and mentors engineers. Collaborates with cross-functional stakeholders to deliver scalable tools for real estate agents.

Build and maintain React and TypeScript web applications for EEG analytics, clinical study management, and at-home patient diagnostics. Own user experience, performance, reliability, and observability while designing data-rich workflows and interactive visualizations. Collaborate asynchronously with product designers and cross-functional teams, contribute to roadmap direction, and develop scalable GraphQL consumers. The role involves supporting clinical operations, physician workflows, and diagnostic reporting.

Principal Frontend Engineer responsible for defining and governing large-scale frontend architecture across clinical applications. Leads modernization from fragmented systems to a React-based platform using JavaScript, TypeScript, Node.js, GraphQL, and shared component standards. Drives migration strategy, technical governance, performance improvements, AI-assisted development tooling, and cross-team alignment while mentoring engineers. Advises on CI/CD, AWS infrastructure, Oracle integrations, legacy Perl utilities, security, hiring, and long-term workforce planning.

Lead frontend architecture and delivery for React-based clinical applications. Mentor engineers, establish component libraries and coding standards, integrate GraphQL and REST APIs, support Node.js tooling and server-side rendering, lead migration to a unified architecture, and drive testing, performance, accessibility, deployment readiness, and cross-functional technical alignment.

Develop and maintain scalable React and TypeScript frontend applications for clinical healthcare workflows. Build reusable accessible components, integrate GraphQL and REST APIs, migrate legacy architectures, optimize performance, troubleshoot UI issues, and support testing, deployment, documentation, and engineering standards. Collaborate with product, design, and backend teams while using Node.js, AWS, and related tooling to deliver a unified frontend platform.

Senior frontend-focused software engineer responsible for authentication, verification, and fraud experiences across web, mobile, and backend systems. The role owns team goals, designs and delivers highly available systems, collaborates with product and design partners, improves engineering standards, supports operations and on-call efforts, and mentors engineers. Candidates should have strong web application architecture experience, proficiency with React or Vue and JavaScript or TypeScript, and excellent communication skills.

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.

Own the technical direction and architecture of WHOOP’s growth-focused web experiences, including join flow, checkout, and shop. Lead cross-functional projects, design A/B tests, improve performance and accessibility, integrate payment and ecommerce systems, and ensure reliability through monitoring and incident response. Mentor engineers, review technical plans and code, lead postmortems, and contribute to engineering processes and documentation.

Build and maintain performant, responsive, mobile-first web applications using Next.js, React, and Tailwind CSS. Translate product goals into polished member-facing experiences, prototype and ship features with AI-assisted workflows, integrate RESTful APIs, and collaborate with product, design, and backend teams. Establish frontend best practices for architecture, accessibility, performance, and maintainability while contributing to UX decisions and navigating ambiguous problems.

Develop and enhance LangSmith frontend features using React and TypeScript. Build reusable components, translate designs into high-quality interfaces, optimize performance across browsers and devices, and collaborate with backend, full-stack, and UX/UI teams to improve usability and product quality.

Build high-performance, responsive, and accessible frontend applications across e-commerce, B2B, and internal tools using Next.js, React, and TypeScript. Implement design-system components, optimize Core Web Vitals, add animations, support A/B testing, collaborate in a monorepo with backend teams, and design interfaces for AI agents with real-time streaming and error handling.

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.

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.

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.

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.

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.

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

Serves as a technical lead for Military OneSource and related websites, developing WordPress-based front-end experiences with HTML, CSS, and JavaScript. Responsibilities include accessibility compliance, UX implementation, API integration, troubleshooting, Agile collaboration, modernization initiatives, documentation, and developer mentorship. The role is fully remote and requires an active Secret clearance.

Develop, maintain, and optimize production-grade frontend code for enterprise client websites. Participate in code reviews, documentation, accessibility optimization, performance-focused animation, and agile collaboration with multidisciplinary teams. The role requires delivering polished, scalable web experiences for external clients on fixed deadlines while working independently in a remote environment.

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.

Build performant, accessible front-end interfaces for AI agents, dashboards, conversational user interfaces, and visualization tools. Collaborate with designers, AI engineers, and backend developers to create scalable components, optimize cross-browser experiences, and iterate on UX using testing, feedback, and usage data.