Principal Web Development Engineer

About Zscaler Zscaler accelerates digital transformation to ensure our customers can be more agile, efficient, resilient, and secure. As an AI-forward enterprise , we are constantly pushing the envelope, leveraging the world’s largest security data lake to power our cloud-native Zero Trust Exchange platform. This innovation protects our customers from cyberattacks and data loss by securely connecting users, devices, and applications in any location. Here, impact in your role matters more than title and trust is built on results. We say, impact over activity. We seek innovators who actively use AI to amplify their impact and who thrive in an environment where we leverage intelligent systems to stay ahead of evolving threats. We believe in transparency and value constructive, honest debate —we’re focused on getting to the best ideas, faster. We build high-performing teams that can make an impact quickly and with high quality. To do this, we are building a culture of execution centered on customer obsession , collaboration, ownership, and accountability. We value high-impact, high-accountability with a sense of urgency where you’re enabled to do your best work and embrace your potential. If you’re driven by purpose, thrive on solving complex challenges, and want to be part of the team that’s helping to secure the AI age, we invite you to bring your talents to Zscaler and help shape the future of cybersecurity. Role We are looking for a Principal Web Development Engineer to join our Engineering team. This is a hybrid role based in Bangalore, reporting to the Director, Software Engineering. You will join our Frontend Engineering team to lead the design, development, and evolution of browser extensions. You will play a pivotal role in shaping Zscaler’s next-generation user interfaces while mentoring and guiding other engineers. What you’ll do (Role Expectations) • Architect and lead the development of scalable, secure, and performant browser extensions using TypeScript while providing technical mentorship to the engineering team • Own the extension build system and tooling to ensure reliable builds across all supported browsers while enforcing best practices in testing, modular design, and performance • Champion the expansion of design systems for reusable and accessible components, driving the adoption of standards that ensure quality across all extension surfaces • Partner across functions to define API contracts, roadmap integrations, and collaborate with DevOps to streamline CI/CD pipelines and evaluate emerging technologies • Lead the refactoring and redesign of legacy systems to improve scalability and reliability through research-driven development and engineering excellence Who You Are (Success Profile) • You thrive in ambiguity and are comfortable building the path as you walk it, viewing dynamic environments as the raw material to build something meaningful • You act like an owner with a passion for the mission and a bias for action, seamlessly navigating between high-level strategy and hands-on execution • You are a problem-solver who runs toward challenges with a laser focus on finding solutions that deliver the highest impact • You are a high-trust collaborator who is ambitious for the team, embracing a challenge culture where candor and feedback are used to build respect and teamwork • You are a learner with a true growth mindset, committed to your own development and actively seeking feedback to become a stronger teammate What We’re Looking for (Minimum Qualifications) • 13+ years of software development experience, with at least 5 years specializing in large-scale production TypeScript • Expert-level proficiency in TypeScript, ES6+, core JavaScript, and advanced state management • Proficient in HTML5 and CSS3 for building large-scale, responsive applications • Extensive experience developing unit, integration, and E2E tests using Vitest, Jest, or Playwright • Solid understanding of web application security risks and vulnerabilities What Will Make You Stand Out (Preferred Qualifications) • Extensive experience deploying browser extensions across major browsers, including deep knowledge of extension APIs, manifest versions, and store submission processes • Expertise in profiling and optimizing frontend applications for speed and minimal loading times using lazy loading and tree shaking • Proven ability to architect and implement scalable, modular solutions for multi-tenant applications with a focus on future-proofing #LI-HYBRID #LI-SK3 At Zscaler, we are committed to building a team that reflects the communities we serve and the customers we work with. We foster an inclusive environment that values all backgrounds and perspectives, emphasizing collaboration and belonging. Join us in our mission to make doing business seamless and secure. Our Benefits program is one of the most important ways we support our employees. Zscaler proudly offers comprehensive and inclusive benefits to meet the diverse…