Principal Software Engineer, Infrastructure & Reliability

Emerging Technology Valencia, Spain Madrid, Spain


We are looking for people who are sharp, creative and hardworking, with an unwavering desire to be the best. 

Traditional security companies are becoming less relevant as cloud adoption and digital transformation become the norm in every market industry and every market segmentation. Zscaler has been a leader in Gartner’s MQ for 9 consecutive years and has helped shape the emerging SASE category (a true category creator). We are well-positioned to dominate this massively growing cloud security market.  

The Zscaler Culture 

Winning Technology and Products -
We offer the best technology and products for the Cloud First world. We pioneered cloud security and continue to grow our 20B + TAM by releasing new products every year. 
Supportive Leadership – An industry-leading leadership team with strong values, off the chart business acumen that will help you succeed quickly while providing mentorship and career growth.
Competitive; We Play to Win – We are playing in a Rapidly growing TAM and huge market mega-shifts that leads directly to Zscaler; tracking a growth path similar to Salesforce, Workday, & ServiceNow.

Principal Software Engineer, Infrastructure & Reliability

We have a terrific opportunity in our Zscaler Isolation Platform team for a Principal Software Engineer. This is an excellent opportunity to join a small, dynamic team that is working on cutting edge Browser Isolation technology to evolve our current cloud security flagship products: ZIA and ZPA.

The Principal Software Engineer will report to the Sr. Director, Software Engineering. Zscaler is looking for a seasoned and agile software engineer that has a unique combination of skills. The ideal candidate will play a key role in all phases of the product development cycle, from definition, design, through implementation and test of components of our Browser Isolation Platform.

About the Team

The Isolation Platform is a small distributed team that works fast and lives on the cutting edge of software engineering in backend, frontend and infrastructure.

We like open-source but we are not 
afraid of building stuff ourselves where it makes sense and we can optimize something.

philosophy is: done is better than perfect and we strive to work iteratively and optimize our processes along the way so that we can achieve reliable and fast product deliverables that delight our customers.

The environment is fast-paced and requires the ability to take initiative and manage ambiguity to drive effective results.

This role may interface with customers, subject matter experts, technical experts, developers and other QA engineers located globally and in different time zones.

  • Act as SME for multiple components from our architecture from design to implementation to reliability and scalability in production         
  • Design automated systems and code for high availability and scale with security in mind for public cloud applications 
  • Analyzing product requirements and translating into a feasible technical solution.
  • Mentor junior members of the team to help ramp them up different components and architecture of the system
  • Influence & manage all aspects of automation and reliability for our cloud infrastructure
  • Build tools and solutions that will drive continuous improvement around Performance, Reliability and Availability of a cloud based product
  • Experience developing full stack in distributed and cloud environments with experience of DevOps
  •  Production Experience in leading, designing, building and operating products in a cloud based infrastructure (AWS/GCP/Azure)
  • Intermediate level experience working with one or more config management orchestration tools like Ansible, Terraform, Puppet, Salt or Chef
  • Intermediate Experience with containerization (e.g. Kubernetes and Docker) 
  • Knowledge of CI/CD tools (e.g. Jenkins Pipeline, Spinnaker or Bamboo)
  • Experience in designing and working with one or more technologies to build on Observability of a cloud product (Kibana, Prometheus, Grafana, Splunk, Sumologic etc.)
  • Experience building and operating monitoring tools for traditional and cloud environments
  • Strong analytical mind for problem solving
  • Exceptional English communication skills, both written and verbal. This includes listening skills and an open attitude toward constructive feedback.
  • Debugging/troubleshooting experience on performance and memory.
  • Strong team leadership skills, including the ability to mentor, motivate and influence others on technical aspects of a product.
In return, we will invest in you, and your customers. You will be supported by a world-class team made up of some of the most prominent names in security who turn our customers into advocates and give you the skills you need to build a highly successful career.

Additionally, we will make every effort:
  • To provide you with the best support, learning, and access to expertise in the marketplace.
  • To invest in your personal and professional growth and reward you accordingly with competitive pay, benefits, and equity.
  • And, provide you with an environment that is defined by collaboration.  

Why Zscaler?
People who excel at Zscaler are smart, motivated and share our values. Ask yourself: Do you want to team with the best talent in the industry? Do you want to work on disruptive technology? Do you thrive in a fluid work environment? Do you appreciate a company culture that enables individual and group success and celebrates achievement? If you said yes, we’d love to talk to you about joining our award-winning team. 

Additional information about Zscaler (NASDAQ: ZS ) is available at

Zscaler is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.


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