About Persistent

We are an AI-led, platform-driven Digital Engineering and Enterprise Modernization partner, combining deep technical expertise and industry experience to help our clients anticipate what's next. Our offerings and proven solutions create a unique competitive advantage for our clients by giving them the power to see beyond and rise above. We work with many industry-leading organizations across the world, including 20 Fortune 50 companies and 4 of the 5 top banks in both the US and India, and numerous innovators across the healthcare ecosystem.

Our disruptor's mindset, commitment to client success, and agility to thrive in the dynamic environment have enabled us to sustain our growth momentum. Persistent has been recognized across top industry platforms for innovation, leadership, and inclusion. We reported $1,654.4M FY26 revenue with 17.4% Y-o-Y growth. We have delivered 24 sequential quarters of growth with $436.0M in Q4 FY26 revenue, up 3.2% Q-o-Q and 16.2% Y-o-Y growth. Our 27,500+ global team members, located in 18 countries, have been instrumental in helping the market leaders transform their industries. We have been recognized as the Fastest Growing IT Services Brand Globally in the 2026 Brand Finance IT Services 25 Report. We named a Leader in the Everest Group Private Equity (PE) Services PEAK Matrix Assessment 2026 and Software Product Engineering PEAK Matrix Assessment 2026.

About Position

We are seeking a highly skilled Network Stack Developer (C/C++) to join our team working on next-generation firewall platforms, including SonicOS Gen 7 and Gen 8. These platforms introduce advanced capabilities such as a modernized UI, TLS 1.3 decryption, multi-instance enterprise support, native ZTNA, and enhanced cloud management tailored for Managed Service Providers (MSPs). In this role, you will contribute to the core firmware and networking stack that powers mission-critical security features. You will play a key role in ensuring high-performance packet processing, robust security enforcement, and continuous innovation across firewall technologies.

Role: C++ Project Manager
Location: Pune
Experience: 12+ Years
Job Type: Full Time Employment

What You'll Do

Develop Secure Network Stack Components: Design and implement data-plane networking features using C and C++, focusing on high-performance and secure packet processing.
Core OS & Firmware Development: Build and maintain kernel modules, device drivers, and low-level system components on embedded platforms.
Network Protocol Implementation: Develop and enhance protocol stacks including Layer 3 & Layer 4, IPSec, VXLAN, SSL VPN, and other secure communication protocols.
Security Feature Integration: Implement advanced security mechanisms such as TLS 1.3 decryption, ZTNA, secure boot, encryption modules, and access control systems.
Vulnerability Analysis & Mitigation: Identify and fix security issues like buffer overflows, race conditions, and memory leaks, and apply OS hardening techniques.
Performance Optimization: Ensure optimal throughput and latency by tuning system-level performance in real-time and embedded environments.
High Availability & Scalability: Develop features supporting multi-instance deployments and high availability on network devices/cards.
Collaborate Cross-Functionally: Work closely with hardware, QA, and cloud teams to ensure seamless feature integration across the product lifecycle.
Code Review & Documentation: Conduct in-depth code audits and maintain technical documentation for architecture, design, and security practices.

Expertise You'll Bring

Strong programming expertise in C and C++, with focus on:

Memory management
Multithreading and concurrency

Deep understanding of Operating System internals:

Process scheduling
Memory management
File systems

Hands-on experience with low-level programming and hardware interaction
Proven experience in:

Data-plane network stack development
DPDK / OpenDataPlane (OPD) frameworks

Strong knowledge of networking technologies:

IPSec, VXLAN
Layer 3 / Layer 4 protocols
SSL VPN

Experience with high availability systems in networking environments

Benefits

Competitive salary and benefits package
Culture focused on talent development with quarterly growth opportunities and company-sponsored higher education and certifications
Opportunity to work with cutting-edge technologies
Employee engagement initiatives such as project parties, flexible work hours, and Long Service awards
Annual health check-ups
Insurance coverage: group term life, personal accident, and Mediclaim hospitalization for self, spouse, two children, and parents

Values-Driven, People-Centric & Inclusive Work Environment

Persistent is dedicated to fostering diversity and inclusion in the workplace. We invite applications from all qualified individuals, including those with disabilities, and regardless of gender or gender preference. We welcome diverse candidates from all backgrounds.

We support hybrid work and flexible hours to fit diverse lifestyles.
Our office is accessibility-friendly, with ergonomic setups and assistive technologies to support employees with physical disabilities.
If you are a person with disabilities and have specific requirements, please inform us during the application process or at any time during your employment

Let's unleash your full potential at Persistent - persistent.com/careers

Persistent is an Equal Opportunity Employer and prohibits discrimination and harassment of any kind.

C C++,TCP IP

C++ Project Manager