Zscaler
Principal Software Development Engineer at Zscaler
Zscaler is hiring a Principal Software Development Engineer in Bangalore, IND. The role details below come from the employer’s posting. You apply on the employer’s own site, and TechJobs360 never charges candidates.
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1. Job details
Zscaler
Principal Software Development Engineer
Bangalore, IND
Not disclosed by employer
See the job description
On the employer’s site
2. Job description from Zscaler
Zscaler (NASDAQ: ZS) accelerates digital transformation so customers can be more agile, efficient, resilient, and secure. The Zscaler Zero Trust Exchange platform protects thousands of customers from cyberattacks and data loss by securely connecting users, devices, and applications in any location. Distributed across 200+ public data centers globally and thousands of private sites at the edge, the SASE-based Zero Trust Exchange is the world’s largest in-line cloud security platform.
We believe the future of work is Human + AI and are building an AI-native enterprise where human potential is amplified by machine intelligence to solve the world’s hardest security challenges. Driven by deep customer obsession, we are committed to the mission, outcome, and to each other. We bring these commitments to life through three core behaviors: ownership and collaboration, trust through outcomes and impact, and a challenge culture with ongoing feedback. Ready to make an impact at the company pioneering security transformation in the AI era? Join us at Zscaler.
Role
We are looking for a Principal Software Development Engineer to join our team. This is a Hybrid role, reporting to the Senior Manager, Software Development Engineering in the Data Protection department.
In this position, you will serve as a premier technical leader, defining architectural direction, designing high-performance systems-level subsystems, and driving the engineering execution of our next-generation inspection capabilities.
What you’ll do (Role Expectations)
- Architect and implement high-performance DLP engines, dictionary compilers, and distributed incident processing pipelines, setting the benchmark for clean, highly optimized systems-level C code running in production proxy runtimes
- Own the technical direction and architectural roadmap for line-rate pattern matching, regular expression evaluators, custom dictionary compilers, exact data match (EDM), and indexed document matching (IDM)
- Help develop next-generation Data Loss Prevention (DLP) solutions utilizing Machine Learning (ML) models, collaborating with data science teams to successfully deploy and integrate models in high-throughput data paths while balancing inspection capabilities against strict network latency and resource constraints
- Establish and enforce exacting architectural standards for multi-threaded C daemons on FreeBSD/Linux, designing robust shared memory structures, high-performance Inter-Process Communication (IPC), lockless concurrency, and memory-safe subsystems
- Serve as the technical escalation authority for critical production issues—leading hands-on post-mortem core dump analysis, deep system profiling, and leak detection
Who You Are (Success Profile)
- You act like an owner with a bias for action, navigating seamlessly between high-level architectural strategy and hands-on execution.
- You are a high-trust collaborator who embraces open feedback, communicates with candor and respect, and champions the collective success of the engineering team.
- You are customer-obsessed, anchoring technical and design decisions in solving real-world challenges for both internal stakeholders and external users.
- You are driven by innovation and intellectual curiosity, continually seeking robust, secure, and scalable approaches to complex systems engineering challenges.
- You lead with integrity and high accountability, building trust through consistent, transparent action and technical stewardship.
What We’re Looking for (Minimum Qualifications)
- Foundational understanding of AI/ML technologies and experience leveraging, securing, or positioning AI-driven solutions to optimize outcomes within your functional domain
- 10+ years of experience with systems software engineering, including a proven track record of technical leadership (e.g., as a Tech Lead or Principal Engineer) driving the design and delivery of high-performance backend platforms
- Advanced hands-on proficiency in C programming on Linux or FreeBSD runtime environments, with deep architectural expertise in Inter-Process Communication (IPC) and shared memory architectures
- Expert-level proficiency in production troubleshooting and root-cause analysis, including post-mortem core dump analysis, GDB/LLDB debugging, Valgrind, and system-level performance tracing
- Proven track record of mentoring, guiding, and multiplying the impact of systems software engineers across the organization, championing engineering excellence, conducting rigorous design reviews, and fostering continuous technical growth
What Will Make You Stand Out (Preferred Qualifications)
- Proven ability to leverage AI technologies and workflows to drive measurable operational efficiency
- Strong familiarity with Data Loss Prevention (DLP) technologies, including regex evaluation engines, custom dictionary compilers, and EDM (Exact Data Match) / IDM (Indexed Document Matching) profiles
- Hands-on experience or familiarity with public cloud environments (specifically AWS and Azure), including deploying, optimizing, or maintaining performance-intensive cloud-native systems
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!
Learn more about Zscaler's hybrid working model and benefits here .
By applying for this role, you adhere to applicable laws, regulations, and Zscaler policies, including those related to security and privacy standards and guidelines.
3. Skills that usually matter in software engineering roles
General guidance from TechJobs360, not part of Zscaler’s posting. The job description above is what counts for this role.
| Area | What to be comfortable with |
|---|---|
| Languages | Java, Python, Go, C# or C++ |
| Frameworks & tools | A web framework, SQL and NoSQL databases, Git, cloud basics |
| Computer science basics | Data structures, algorithms, complexity |
| Ways of working | Version control, code review, testing, reading other people's code |
4. How to prepare for a Principal Software Development Engineer interview
Interview formats differ by company and team, so confirm the rounds with the recruiter. Most hiring loops for roles like this cover:
A recruiter call or an online test. Read the job description twice and be ready to explain how your experience matches it.
Often coding problems on arrays, strings, trees, graphs or dynamic programming, solved while you explain your thinking.
Often design and trade-off questions sized to the role: an API, a component, or a small system.
Answer with the STAR method (Situation, Task, Action, Result). Prepare two or three real stories: a hard problem you solved, a disagreement you handled, and something you learned quickly.
5. Take-home pay example (FY 2026–27, new tax regime)
An example for two common package sizes, not this job’s salary. Under the new tax regime (Section 115BAC) salaried employees get a standard deduction of ₹75,000.
| Component | Example: ₹12 LPA | Example: ₹24 LPA |
|---|---|---|
| Basic salary (40% of CTC) | ₹40,000 / mo | ₹80,000 / mo |
| Employee EPF (12% of basic) | -₹4,800 / mo | -₹9,600 / mo |
| Income tax (TDS) | -₹6,933 / mo | -₹32,450 / mo |
| Professional tax | -₹200 / mo | -₹200 / mo |
| Approx. in-hand | ₹81,344 / mo | ₹1,44,304 / mo |
Work out the take-home pay for your own offer, in either tax regime.
6. Questions and how to apply
How do I apply?
Use the apply button below. It opens Zscaler’s own application page.
Does TechJobs360 recruit for this job or charge a fee?
No. We list openings from employers’ career sites. Zscaler runs the hiring, and nobody should ask you to pay to apply.
Is this job still open?
We check listings against the employer’s page every day and take down jobs that have closed.
Should I apply if I don’t match every requirement?
Usually yes, if you meet most of the core requirements and can show you learn quickly. A referral from someone on the team can help your resume get read.
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