Sr Frontend Engineer

Job Description

Career Renew is recruiting for one of its clients a Senior Frontend Engineer - this is an onsite role in New York.

We are seeking a highly skilled and motivated Senior Frontend Engineer to take a pivotal role in developing and refining our user-facing applications. You will be instrumental in architecting and implementing new features, championing frontend best practices, and significantly improving the performance, maintainability, and overall "sleekness" of our existing Next.js/React frontend.

This is a unique opportunity for an engineer who enjoys the full spectrum of frontend development – from collaborating closely with designers on Figma mockups to meticulously debugging memory leaks and refactoring complex components. If you're someone who sees tech debt not just as a challenge, but as an opportunity to make a tangible impact, we want to hear from you.

Key Responsibilities:

Develop & Enhance Features: Design, build, and maintain scalable, high-quality, and performant user interfaces using Next.js, React, and TypeScript.

Drive Frontend Excellence: Champion best practices in frontend architecture, code quality, performance optimization (Core Web Vitals, load times, rendering efficiency), and accessibility.

Tackle Technical Debt: Proactively identify, diagnose, and refactor areas of our existing codebase to improve performance (e.g., addressing memory leaks, reducing bundle sizes, optimizing component rendering), reduce clunkiness, and enhance maintainability.

Figma to Frontend Implementation: Collaborate closely with UI/UX designers to translate Figma designs and prototypes into responsive, pixel-perfect (where appropriate), and interactive web experiences. Provide feedback to designers on feasibility and suggest web-friendly optimizations.

Performance Optimization: Continuously monitor, analyze, and optimize frontend performance, ensuring a smooth and delightful user experience across various devices and browsers.

Mentorship & Collaboration: Mentor junior engineers, conduct code reviews, and actively participate in team discussions to foster a culture of technical excellence and knowledge sharing.

Testing & Quality Assurance: Write robust unit and integration tests to ensure code quality and stability. Work with QA to address bugs and ensure a polished final product.

Stay Current: Keep abreast of and evaluate emerging frontend technologies, frameworks, and best practices to advocate for their adoption where beneficial.

Required Skills & Experience:

Extensive React & Next.js Expertise: 5+ years of professional experience building complex web applications with React, with at least 2-3 years specifically focused on Next.js (including SSR, SSG, ISR, API Routes, next/image, next/font, next/dynamic).

Strong JavaScript/TypeScript: Deep understanding of modern JavaScript (ES6+), TypeScript, and their nuances.

HTML & CSS Mastery: Proficient in semantic HTML and advanced CSS (Flexbox, Grid, SASS/LESS, CSS-in-JS, responsive design).

Performance Tuning: Proven experience in diagnosing and resolving frontend performance bottlenecks, including memory leaks, slow rendering, large bundle sizes, and optimizing for Core Web Vitals. Familiarity with browser developer tools (Performance, Memory, Lighthouse).

State Management: Experience with various React state management solutions (e.g., Context API, Zustand, Jotai, Recoil, Redux Toolkit) and the ability to choose the right tool for the job.

Figma Proficiency: Experience working with Figma designs, understanding component libraries, auto-layout, variants, and exporting assets. Ability to collaborate effectively with designers.

API Integration: Experience integrating with RESTful or GraphQL APIs.

Testing Frameworks: Experience with frontend testing frameworks (e.g., Jest, React Testing Library, Cypress).

Version Control: Proficient with Git and collaborative Git workflows.

Problem-Solving Mindset: Excellent analytical and problem-solving skills, with a proactive approach to tackling technical debt and complex issues.

Communication & Collaboration: Strong verbal and written communication skills, with the ability to articulate technical decisions clearly and work effectively in a team environment.

Desirable/Bonus Skills:

Experience with UI animation libraries (e.g., Framer Motion, GSAP).

Knowledge of Web Workers or other techniques for offloading main thread work.

Experience with component library development and tools like Storybook.

Familiarity with CI/CD pipelines.

Understanding of web security best practices.

Contributions to open-source projects.

Full-time