Sr. Staff Software Development Engineer

2 days ago

Bangalore IND, India Zscaler Full time ₹ 12,00,000 - ₹ 36,00,000 per year

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 a Principal Software Development Engineer to our Zero Trust Exchange team. Reporting to the Sr Manager of Software Engineering, you'll be responsible for:

  • Conducting comprehensive performance investigations across production and pre-production environments, network stack, microservices, and client-side browser performance
  • Advocating for and implement "shift-left" performance strategies, focusing on systemic fixes and architectural improvements to prevent performance regressions and minimise reactive "firefighting"
  • Analysing and optimising front-end application performance using advanced browser tools, focusing on critical metrics such as Time to First Byte (TTFB), Largest Contentful Paint (LCP), and Total Blocking Time (TBT)
  • Developing and maintaining specialised performance tooling, tracing scripts (e.g., EBPF), and advanced visualisations like Flame Graphs to identify and communicate complex bottlenecks
  • Collaborating closely with development and infrastructure teams, providing expert guidance on performance design, code optimisation, and efficient utilisation of operating system and network resources
What We're Looking for (Minimum Qualifications)
  • 8 years of experience specialising in systems performance engineering, with a foundational understanding of operating system internals (Linux) and core resource management (CPU, Memory, Disk, Network)
  • Hands-on experience with advanced Linux performance tools, including perf, DTrace, or eBPF/BPF Performance Tools, capable of conducting in-depth kernel-level analysis
  • In-depth knowledge of k8s performance considerations, including cluster capacity planning, CNI overhead, resource limits (requests and limits), and efficient pod scheduling
  • Expertise in utilising advanced profiling features in Chrome Developer Tools (Lighthouse, Performance tab) to diagnose rendering jank, JavaScript execution time, and core web vitals
What Will Make You Stand Out (Preferred Qualifications)
  • Experience tuning cloud provider infrastructure and services (e.g., AWS EC2/EKS, GCP GKE) for optimal price-performance ratios
  • Familiarity with the concepts and principles of proactive performance management and capacity planning
  • Experience generating and interpreting advanced performance visualisations such as Flame Graphs and Heat Maps

#LI-HYBRID

#LI-GL2

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