Principal Software Development Engineer (ReactJavascriptTypescript)

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 worlds 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 debatewere 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 youre enabled to do your best work and embrace your potential. If youre driven by purpose thrive on solving complex challenges and want to be part of the team thats 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 visionary Principal Software Development Engineer to join our Frontend Engineering team and lead the design development and evolution of world-class web applications. Reporting to the Manager of Software Development Engineering you will play a pivotal role in shaping Zscalers next-generation user interfaces.

This is a high-impact leadership role where you will balance hands-on architecture with strategic technical direction mentoring and guiding other engineers to elevate our overall engineering excellence.

What Youll Do (Key Responsibilities)

• Architect & Deliver: Design and build high-quality ReactJS solutions specializing in translating complex UI/UX designs into robust production-ready applications while providing technical mentorship to foster a culture of innovation
• Drive Engineering Excellence: Shape and evolve Zscalers core design system. Champion frontend best practices including modularity semantic code comprehensive automated testing and deep performance tuning
• Cross-Functional Integration: Define clean API contracts and seamless integration roadmaps in collaboration with backend teams. Partner with DevOps to optimize CI/CD pipelines and continuously evaluate emerging technologies
• Scale & Refactor: Lead systematic refactoring efforts to ensure long-term scalability reliability and maintainability. Drive engineering excellence with a strong focus on accessibility (a11y) and research-driven methodologies

Who You Are (Success Profile)

• You Think at Scale: You connect your day-to-day work to the larger company mission and think globally. You build solutions processes and architectures that are not just effective today but are built to last and support a high-growth organization
• You are Driven by Innovation: You possess a deep curiosity for how things work and are energized by solving complex technical hurdles. You believe in the power of technology to accelerate transformation and consistently hunt for more secure scalable methods
• You are a Problem-Solver: You actively seek out engineering challenges because you are energized by finding solutions knowing that solving the hardest problems delivers the biggest business and customer impact
• You are Data-Driven: You lean on data and analytics to uncover engineering truths measure what matters and guide informed architectural decisionsreplacing I think with I know.
• You are a Learner: You have a true growth mindset and never stop developing your technical or leadership skills. You actively seek and implement feedback to become an exceptional collaborator and teammate

What Were Looking For (Minimum Qualifications)

• Experience: 8 years of professional software development experience with 5 years specializing in large-scale production-grade ReactJS and Redux applications
• Technical Mastery: Expert-level proficiency in ReactJS development using TypeScript ES6 and advanced state management paradigms
• Data Visualizations: Proven experience building highly complex UIs data-heavy dashboards and advanced data visualizations (e.g. )
• Testing Excellence: Deep expertise in developing extensive unit integration and E2E testing suites using frameworks such as Jest Enzyme or Cypress
• Enterprise Architecture: Proven track record of designing and deploying large-scale enterprise UIs emphasizing high availability performance and a seamless global user experience
• AI Tool Integration: Demonstrated curiosity and active exploration of AI tools with a history of integrating modern technologies to enhance daily workflows and augment problem-solving capabilities

What Will Make You Stand Out (Preferred Qualifications)

• Advanced experience driving performance optimization (speed responsiveness) using cutting-edge techniques such as lazy loading code splitting and tree shaking to enhance application scalability
• Strong familiarity with backend development principles and practical experience using (or similar) for API integration tooling and debugging
• Ability to architect and implement scalable modular solutions tailored for multi-tenant enterprise applications ensuring future-proofed system development

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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 needs of our employees and their families throughout their life stages including:

By applying for this role you adhere to applicable laws regulations and Zscaler policies including those related to security and privacy standards and guidelines.

Zscaler is committed to providing equal employment opportunities to all individuals. We strive to create a workplace where employees are treated with respect and have the chance to succeed. All qualified applicants will be considered for employment without regard to race color religion sex (including pregnancy or related medical conditions) age national origin sexual orientation gender identity or expression genetic information disability status protected veteran status or any other characteristic protected by federal state or local laws. See more information by clicking on the Know Your Rights: Workplace Discrimination is Illegal link.

Pay Transparency

Zscaler complies with all applicable federal state and local pay transparency rules.

Zscaler is committed to providing reasonable support (called accommodations or adjustments) in our recruiting processes for candidates who are differently abled have long term conditions mental health conditions or sincerely held religious beliefs or who are neurodivergent or require pregnancy-related support.