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Principal Software Engineer - Cloud Systems (Enterprise Browser)

Madrid, ESP; Remote - Spain; Valencia, ESP

About Zscaler

Serving thousands of enterprise customers around the world including 45% 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 are looking for an experienced Cloud Systems Software Engineer to join our Enterprise Browser Product Team. Reporting to the Manager, Software Development Engineering in Spain, you will be working remotely and you'll be responsible for:

  • Leading the design, architecture, and development of highly scalable, securing cloud systems that enabling seamless communication between desktop agents, browser extensions, and Zscaler's cloud infrastructure.
  • Architecting fault-tolerant, distributed cloud systems that support dynamic workloads and long-running networking sessions.
  • Owning and improving key services handling communication protocols (e.g., gRPC, HTTP, REST APIs) for efficient interactions with desktop agents and browser extensions.
  • Collaborating with cross-functional teams to identify and implement solutions to complex technical challenges in Zscaler ecosystem
  • Taking a proactive role in operational excellence, ensuring minimal downtime, seamless deployments, and rapid incident resolution for production services.

What We Are Looking For (Minimum Qualifications):

  • 12+ years of experience in professional software development, with 5+ years focused on designing cloud systems.
  • Advanced proficiency in Go (Golang), with hands-on experience building scalable API-driven cloud services and microservices
  • Expert understanding of distributed systems, load balancing, caching, and fault tolerance in cloud environments.
  • Strong experience with communication protocols, including HTTP, gRPC, and REST APIs, and secure endpoint design.
  • Proficient in container technologies like Docker and orchestration tools such as Kubernetes.

What Will Make You Stand Out (Preferred Qualifications):

  • Familiarity or willingness to contribute to Go or JavaScript
  • Experience integrating cloud services with desktop applications or browser extensions.
  • Experience with large scale desktop agents updates

#LI-MM8
#LI-REMOTE

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:

  • Various health plans
  • Time off plans for vacation and sick time
  • Parental leave options
  • Retirement options
  • Education reimbursement
  • In-office perks, and more!

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.

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In consideration of Zscaler, Inc. or any of its subsidiaries (together referred to as “Zscaler”) granting the opportunity to apply for a position with Zscaler, I agree (a) to use Confidential Information for the sole purpose of evaluating a position with Zscaler, (b) that I will not disclose Confidential Information to anyone outside of Zscaler, (c) that all Confidential Information disclosed by Zscaler (and any derivative works thereof) remains the property of Zscaler, and no license or other rights to Confidential Information is granted or implied, (d) not to use the systems of my current employer to access any Confidential Information or download any Confidential Information onto the systems of my current employer, (e) immediately upon request, to return or destroy all the embodiments and copies of any Confidential Information, and (f) that “Confidential Information” means any nonpublic information disclosed to me by Zscaler, which Zscaler labels or otherwise identifies as confidential or a reasonable person would understand to be confidential.

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