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Software Dev Principal Engineer — System Engineering (Network Security / Firewall OS)

SonicWall -
Bengaluru, Karnataka

Quick apply

Job details

2 hours ago

Qualifications

CI/CD
TCP
Azure
Computer Science
Encryption
Sonicwall
Master's degree
OS Kernels
Firewall
AWS
Electrical experience
Bachelor's degree
SSL
Embedded software
M.Sc
Continuous integration
FIPS
Routing protocols
IPsec
B.E.
VMWare
Linux
TCP/IP
Cybersecurity
Electrical Engineering

Full job description

SonicWall is a cybersecurity forerunner with more than 30 years of expertise and is recognized as a leading partner-first company, ensuring our partners and their customers are never alone in the fight against cybercrime. With the ability to build, scale and manage security across the cloud, hybrid and traditional environments in real-time, SonicWall provides relentless security against the most evasive cyberattacks across endless exposure points for increasingly remote, mobile and cloud-enabled users. With its own threat research center, SonicWall can quickly and economically provide purpose-built security solutions to enable any organization—enterprise, government agencies and SMBs—around the world. For more information, visit www.sonicwall.com or follow us on Twitter, LinkedIn, Facebook and Instagram.

About the Role

Technical leader and hands-on architect responsible for the deepest layers of a next-generation firewall operating system from data-plane packet processing and kernel interfaces to secure platform boot chains, crash diagnostics, and performance optimization across physical appliance and virtual firewall product

Key Responsibilities:

System Architecture — Define and evolve the firewall OS architecture across multiple hardware generations and virtual platforms; OS interface design (A/B image lifecycle, secure boot, recovery mode)
Data Plane Performance — Architect high-performance packet pipelines using DPDK/ODP; optimize throughput, connection rates, and DPI-SSL concurrency across multi-core, multi-queue environments
Crash Analysis & Security Hardening — Serve as senior escalation point for production crashes; drive ASan/eBPF adoption; triage and fix memory corruption, deadlocks, and watchdog failures
Hotfix & Escalation Engineering — Build and deliver targeted firmware fixes; analyze diagnostic logs from field deployments to resolve critical customer issues
Technical Leadership — Set architectural standards and design review processes; mentor engineers on systems debugging and performance analysis; drive modern development workflows

Required Qualifications:

Education: B.Tech/B.E. or M.Tech/M.S. in Computer Science, Electrical Engineering, or related field
Experience: 15+ years in systems/embedded software engineering, with 5+ years in a principal/staff-level technical leadership role. Proven track record shipping production firmware for network security appliances, routers, or embedded networking products.

Must-Have Skills

C Systems Programming — Expert-level C in large embedded codebases; POSIX threading, custom memory allocators, 3264-bit migration, endianness handling
Data Plane — DPDK or ODP: poll-mode drivers, hugepages, RSS, SR-IOV, lockless data structures, per-core caching
Debugging — Coredump analysis (GDB on ARM64/x86), ASan/MSan, eBPF tracing, multi-threaded crash analysis, watchdog/D-state debugging
Security — Secure boot chains, signed images, LUKS2 encryption, certificate management, vulnerability triage
Networking — TCP/IP (IPv4/IPv6), IPSec (IKE/IKEv2), stateful firewall internals (connection cache, NAT, DPI), routing protocols

Preferred Skills

Linux Kernel — Kernel internals (scheduler, memory manager, networking stack), kernel module development, namespaces/cgroups, dm-verity/dm-crypt
Virtualization (VMware ESXi, KVM/QEMU, Hyper-V) and cloud (AWS, Azure, GCP)
Federal certifications (Common Criteria, FIPS 140-3, USGv6, CSfC)
CI/CD for multi-architecture firmware builds

Desired Attributes:

Systems thinker — reasons across hardware, kernel, data plane, and application layers simultaneously
Hands-on leader — writes code, reviews designs, and debugs production crashes alongside the team
Security-first mindset — treats every memory bug as a potential CVE
Cross-functional communicator — translates deep technical issues into actionable guidance for PM, QA, and field teams.

#LI-DS9

#LI-Pune

#LI-Hybrid

#LI-LinuxKernal

#L-POSIX

#LI-DPDK

#LI-Dataplane

SonicWall is an equal opportunity employer.

We are committed to creating a diverse environment and are an equal opportunity employer. All qualified applicants receive consideration for employment without regard to race, color, ethnicity, religion, sex, gender, gender identity and expression, sexual orientation, national origin, disability, age, marital status, veteran status, pregnancy, or any other basis prohibited by applicable law.

At SonicWall, we pride ourselves on recruiting a diverse mix of talented people and providing active security solutions in 100+ countries.

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