Top Senior Front-End Engineer Jobs in Boston, MA

Lead front-end architecture and build high-performance React/TypeScript web applications, integrating with back-end APIs, ensuring type safety, testing, CI/CD, scalability, and UX for AI-driven orchestration workflows.

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.

Develop and maintain Ubegos frontend products: mobile/web quest experiences, user and creator dashboards, admin panel, marketing features, and third-party integrations. Work in one-week Scrum sprints, perform code reviews, contribute to software architecture, and use modern frontend frameworks, relational databases, and AI-assisted coding tools.

Develop and maintain web application user interfaces using Vaadin and front-end technologies. Apply UI fundamentals (including Fitts' law), refactor enterprise applications, collaborate with clients, and mentor/train other front-end developers.

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.

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.

The Senior Frontend Engineer will build and enhance core product experiences using Angular 2+ and React, ensuring high-quality code and collaboration with other teams.

Design, implement, and maintain frontend applications and internal tools. Own delivery of high-visibility features, collaborate with cross-functional teams, mentor peers, and ensure performant, accessible, polished user interfaces integrated with backend systems.

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 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.

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.

As a Senior Frontend Engineer, you will design and build web applications, owning major UI projects, collaborating with cross-functional teams, and optimizing performance for a seamless user experience.

Design, build, and maintain scalable Angular frontend applications using TypeScript, RxJS, and Tailwind. Implement complex UI features, mapping/geolocation with Google Maps API, state management, testing (Jasmine/Karma), error monitoring (Sentry), and CI/CD workflows while collaborating cross-functionally and supporting multiple environments.

The role involves designing and building user interfaces for industrial automation systems, improving frontend architecture, collaborating with backend engineers, and ensuring quality through testing and code reviews.

Expand and maintain Hudl's front-end platform to accelerate product teams: design and implement scalable, performant, accessible front-ends and tooling (Vite, Next.js), consult and review front-end work, support adoption of design systems, and mentor teams to improve developer experience.

Build full-stack vertical slices for a mission-critical government system with a frontend focus: React/TypeScript UIs, Node services, Prisma schemas, PostgreSQL, and AWS. Use agentic AI tools, lead design-system/accessibility, apply TDD and Playwright E2E testing, maintain CI/CD, and iterate continuously with stakeholder review.

Develop AI/ML-powered features in ClickHouse Cloud, focusing on frontend and API architecture, UI/UX, and integrations with AI systems.

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.

Own and evolve Roo's frontend platform: design system, shared UI architecture, developer tooling, and AI-assisted workflows. Lead migrations, React/React Native modernization, Expo adoption, and developer experience improvements. Partner with Product and Design to make components effortless to consume by engineers, designers, and AI agents, and remove platform friction to increase engineering velocity.

Develop and maintain Java backend services for enterprise blockchain applications, integrate APIs with React/Vue frontends, design scalable blockchain solutions, troubleshoot complex backend issues, and collaborate with the team to apply best practices and stay current with blockchain trends.

Lead the development of a scalable frontend web application for an AI photo platform, recommend technologies, and ensure performance optimization.

Lead frontend development for Cerbys Access Management platform, building scalable React/Next.js SaaS features (password vaults, auth/IdP integrations, graph RBAC). Drive security-first engineering, dependency governance, performance, accessibility, testing, observability, and AI-assisted workflows while mentoring engineers and collaborating cross-functionally.

Build and ship full-stack features for North, develop autonomous agents that access sensitive enterprise data, productionize state-of-the-art models, write minimal, secure low-resource code, and collaborate with researchers to deploy performant RAG/agentic applications while prioritizing security and user experience.

Build and ship performant, polished frontend features using React/TypeScript. Refactor code incrementally, implement smooth animations, contribute to backend Node.js APIs when needed, use AI-assisted tools, own production deployments, and collaborate directly with CTO/CPO on product and design.