Lead Frontend Engineer

dentsu•New York, NY

11d•$94,000 - $140,000•Hybrid

About The Position

We are hiring a Senior Frontend Engineer, Technical Lead with deep expertise in JavaScript/TypeScript, React.js, and Next.js to join our growing engineering team. This role is ideal for a seasoned engineer ready to drive end-to-end delivery, mentor developers, and make architectural decisions that scale across teams and regions. Reporting to the CMS Technical Director, you will serve as a hands-on technical leader, responsible for shaping our front-end architecture, championing best practices, and ensuring our applications are performant, accessible, and maintainable.

Requirements

6–8+ years of frontend engineering experience.
4+ years of production experience with React.js and Next.js.
Strong fluency in JavaScript/TypeScript, including modern ES6+ features.
Experience with building and scaling large component libraries or design systems.
Deep understanding of API integration patterns, including REST and GraphQL.
Proficiency in frontend performance tuning, Core Web Vitals, and Lighthouse audits.
Familiarity with automated testing frameworks (Jest, Cypress, Playwright).
Experience with modern CI/CD pipelines and cloud deployment platforms (Vercel, Netlify, AWS, etc.).
Strong background in headless CMS platforms (Contentful, Optimizely, Sitecore, Sanity).

Responsibilities

Lead the architecture, design, and implementation of complex frontend features and systems using Next.js, React, and TypeScript.
Ensure code quality and long-term maintainability through reusable components, atomic design principles, and robust documentation.
Integrate REST and GraphQL APIs efficiently and securely, optimizing for performance and scale.
Drive the adoption of performance best practices (Lighthouse, Core Web Vitals, caching strategies) and accessibility (WCAG standards).
Provide architectural oversight for integrating headless CMS platforms (e.g., Contentful, Optimizely, Sitecore).
Define and uphold best practices for responsive UI development, cross-browser compatibility, and internationalization/multilingual support.
Act as the technical authority and primary point of contact for frontend concerns within your cross-functional squad.
Own the delivery and stability of complex features from planning through production deployment.
Conduct and lead peer code reviews, enforce coding standards, and ensure development consistency across contributors.
Guide estimation efforts, break down epics into deliverable stories, and drive sprint-level planning.
Collaborate with design, backend, DevOps, and product management teams to deliver high-quality experiences.
Mentor and support other frontend developers through pair programming, design sessions, and architecture reviews.
Share knowledge through documentation, internal workshops, and informal learning sessions.
Actively contribute to team growth by encouraging a culture of ownership, feedback, and continuous improvement.