Principal Software Engineer - API Tooling & Frameworks

About Zscaler

Serving thousands of enterprise customers around the world including 40% of Fortune 500 companies, Zscaler (NASDAQ: ZS) was founded in 2007 with a mission to make the cloud a safe place to do business and a more enjoyable experience for enterprise users. As the operator of the world’s largest security cloud, Zscaler accelerates digital transformation so enterprises can be more agile, efficient, resilient, and secure. The pioneering, AI-powered Zscaler Zero Trust Exchange™ platform, which is found in our SASE and SSE offerings, protects thousands of enterprise customers from cyberattacks and data loss by securely connecting users, devices, and applications in any location.

Named a Best Workplace in Technology by Fortune and others, Zscaler fosters an inclusive and supportive culture that is home to some of the brightest minds in the industry. If you thrive in an environment that is fast-paced and collaborative, and you are passionate about building and innovating for the greater good, come make your next move with Zscaler. 

Our Engineering team built the world's largest cloud security platform from the ground up, and we keep building. With more than 100 patents and big plans for enhancing services and increasing our global footprint, the team has made us and our multitenant architecture today's cloud security leader, with more than 15 million users in 185 countries. Bring your vision and passion to our team of cloud architects, software engineers, security experts, and more who are enabling organizations worldwide to harness speed and agility with a cloud-first strategy.

We're looking for an experienced Principal Software Engineer to join our API Team. Reporting to the Director, Software Development Engineering, you'll be responsible for:

• Leading the design and implementation of advanced API tooling and frameworks for seamless UI creation and integration with Zscaler's API services.
• Developing client SDKs with easy-to-use interfaces for data binding and UI component integration, utilizing modern UI frameworks and design patterns.
• Improving UI and API integration by leveraging new approaches, such as generative AI, to automate and enhance UI component development.
• Engaging in hands-on coding to build tools that enhance developer productivity and streamline the API development process.
• Applying domain-driven design principles and mentor engineering teams on best practices, fostering collaboration with UI/UX engineers to create scalable, maintainable, and high-performance backend systems.

What We're Looking for (Minimum Qualifications)

• Proficiency plus 10+ years of experience in at least one programming language (Go, Java, C++, Rust, Javascript etc.)
• Experience (7+ years) building frameworks and tooling for API and UI development, with a focus on enhancing developer experience and productivity.
• Experience with API design standards, best practices (e.g., Swagger/OpenAPI 3.0, REST, JSON, gRPC, Protobuf), and API-first design principles.
• Proficiency in modern UI design patterns (MVC, MVVP, etc.) and experience with popular front-end frameworks (React, Angular, etc.).

What Will Make You Stand Out (Preferred Qualifications)

• Experience developing client SDKs and tooling for data binding, UI integration, Authn/Authz, using JavaScript, TypeScript, or similar languages.
• Expertise in API tooling and frameworks supporting rapid UI development, with a focus on integration, automation, and testing.
• Proficiency with domain-driven design (DDD), container technologies (Kubernetes, Docker), and cloud platforms (AWS, GCP).

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Zscaler’s salary ranges are benchmarked and are determined by role and level. The range displayed on each job posting reflects the minimum and maximum target for new hire salaries for the position across all US locations and could be higher or lower based on a multitude of factors, including job-related skills, experience, and relevant education or training.

The base salary range listed for this full-time position excludes commission/ bonus/ equity (if applicable) + benefits.

Base Pay Range$175,000—$250,000 USD

At Zscaler, we believe that diversity drives innovation, productivity, and success. We are looking for individuals from all backgrounds and identities to join our team and contribute to our mission to make doing business seamless and secure. We are guided by these principles as we create a representative and impactful team, and a culture where everyone belongs. For more information on our commitments to Diversity, Equity, Inclusion, and Belonging, visit the