Frontend Engineer II

HackerRank helps thousands of companies hire developers based on skills rather than pedigree, and also nurtures a community of millions of developers to upskill and become next-gen developers.

The people at HackerRank care deeply about their work and have an extremely intense work ethic. In many companies, speed & quality are a tradeoff. At HackerRank, it’s not; we expect you to ship in about half the time that most competent people think is possible while maintaining a standard of quality you’d proudly sign your name on. The only way to make this happen is to truly love your craft and be deeply committed to growth.

About the role

Every day, millions of developers use HackerRank to prove their skills. Behind the scenes, our Integrity team makes sure those assessments are fair, secure, and trusted.

As a Frontend Engineer II, you’ll craft experiences that protect trust and stay ahead of evolving AI-driven challenges, balancing security, usability, and speed at scale.

This is a role where the details matter; one pixel off, one interaction too clunky, and trust erodes. You’ll design experiences that feel invisible when they work- simple, intuitive, and resilient.

What you’ll do

• Build fast, responsive UIs that scale to 100K+ concurrent users.
• Create intuitive workflows for candidates, interviewers, and hiring teams where security feels effortless.
• Develop modular components that power integrity features across multiple HackerRank products.
• Leverage real-time signals to detect anomalies while keeping the candidate experience seamless.
• Collaborate with design, product, and backend teams to ship quickly and iterate often.

Who you are

• A frontend engineer who enjoys solving complex UI challenges with clean, thoughtful code.
• Brings 2-4 years of experience building modern web apps using React (or similar) with solid JavaScript fundamentals.
• Skilled in crafting accessible, responsive interfaces with React + Typescript, modern state management & modern tooling.
• Confident in debugging deeply and optimizing performance across browsers and devices.
• Curious about emerging AI-powered tools and comfortable integrating them into your workflow.

Even better if you have

• Hands-on experience with front-end security patterns like XSS, CSRF, and sandboxing.
• Built for global audiences - handling localization, RTL layouts, and accessibility edge cases.
• Integrated GraphQL or REST APIs, with TypeScript as part of your workflow.
• Used AI or LLM tools to automate dev workflows or boost code quality.

You will thrive in this role if

• You care about the intersection of security, usability, and scale, and know great UX is a technical challenge.
• Product thinking comes naturally: you question the “why,” sweat the details, and build with users in mind.
• Curious about AI and already exploring how to integrate it into your tools, features, or workflow.

Want to learn more about HackerRank? Check out HackerRank.com to explore our products, solutions and resources, and dive into our story and mission here.

HackerRank is a proud equal employment opportunity and affirmative action employer. We provide equal opportunity to everyone for employment based on individual performance and qualification. We never discriminate based on race, religion, national origin, gender identity or expression, sexual orientation, age, marital, veteran, or disability status. All your information will be kept confidential according to EEO guidelines. 

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Notice to prospective HackerRank job applicants:

• Our Recruiters use @hackerrank.com email addresses.
• We never ask for payment or credit check information to apply, interview, or work here.