Frontend Engineer

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About CustomerLabs

CustomerLabs is
a fast-growing B2B SaaS company helping businesses maximize the value of their
first-party customer data. Our platform helps marketers collect, unify, and
activate customer data to improve marketing performance and drive measurable
growth.

About the Role

You'll turn
complex product requirements into fast, reliable, and delightful web
experiences. You'll build reusable UI with React and JavaScript, care deeply
about responsive design and performance, and ship with strong testing and
browser compatibility.

What You'll Do

· Build reusable UI components and frontend features using JavaScript,
React, HTML5, and CSS3.

· Deliver responsive, mobile-first, pixel-accurate experiences across
devices.

· Ensure consistent behavior across Chrome, Safari, Firefox, and Edge.

· Profile and optimize loading, rendering, bundle size, and runtime
performance.





· Improve Core Web Vitals and build performance guardrails into
everyday development.

· Write unit/component and automated browser tests to prevent
regressions.

· Use DevTools to diagnose network, performance, memory, layout, and
rendering issues.

· Build features using modern Web APIs and Progressive Web App
patterns.

· Collaborate with Product, Design, and Backend on scalable frontend
systems.

Must-Have

· Strong hands-on experience building production web applications with
React and JavaScript.

· Deep fundamentals in JavaScript, React, HTML, and CSS.

· Strong problem-solving and DSA fundamentals applied to frontend
performance and correctness.

· Responsive, mobile-first design and contemporary CSS knowledge.

· Practical cross-browser debugging experience.

· Performance profiling and measurable optimization experience.

· Unit testing and automated browser testing experience.

· Understa

📌 Software Developer (Chennai)
🏢 CustomerLabs
📍 Chennai