Firewall C++ Developer

Persistent Systems; Pune District; Hybrid; INR 4,000,000 - 7,000,000; Full time

Job summary

Persistent in Pune is seeking a Firewall C++ Developer to design, implement and optimize secure networking features. You will work on firewall components, IPSec, VPN, and high-performance packet processing, with TCP/IP, sockets, and low-level networking.

The role requires 8+ years of network/security software experience, strong C/C++, Linux/Unix development, and a collaborative, hybrid work environment that rewards innovation and growth.

Qualifications

• 8+ years of experience in network/security software development.
• Strong programming skills in C or C++.
• Hands-on experience in firewall development.
• Solid knowledge of IPSec and VPN technologies.
• Experience with packet processing and network protocols.
• Proficient in socket programming and TCP/IP stack.
• Linux/Unix-based development experience.
• Strong troubleshooting and debugging skills in networking environments.
• Good understanding of network cybersecurity concepts.

Responsibilities

• Design, develop, and enhance firewall features using C/C++.
• Work on firewall development, including rule processing, packet filtering, NAT, and traffic management.
• Develop and maintain IPSec, VPN, and secure communication protocols.
• Implement efficient packet processing and optimize network traffic handling.
• Work with TCP/IP, UDP, ICMP, HTTP/HTTPS, and related protocols.
• Perform socket programming and low-level networking development.
• Debug and troubleshoot complex network and security issues.
• Analyze system performance and improve security, scalability, and throughput.
• Collaborate with QA, product engineering, and support; contribute to architecture discussions.

Skills

C/C++

Firewall development

IPSec

VPN technologies

Packet processing

Network protocols

Socket programming

TCP/IP stack

Linux/Unix

Job description

We are looking for a highly skilled Firewall Developer with strong expertise in C/C++ programming and deep understanding of network security technologies. The ideal candidate should have hands-on experience in firewall development, IPSec, VPN, packet processing, network protocols, and socket programming (TCP/IP). This role requires a strong troubleshooting mindset and experience in building secure, high-performance networking solutions in the cybersecurity domain

• Role: Firewall C++ Developer
• Location: Pune
• Experience: 8+ Years
• Job Type: Full-Time Employment

What You'll Do:

• Design, develop, and enhance firewall/security product features using C/C++
• Work on firewall development, including rule processing, packet filtering, NAT, and traffic management
• Develop and maintain features related to IPSec, VPN, and secure communication protocols
• Implement efficient packet processing and optimize network traffic handling
• Work with network protocols such as TCP/IP, UDP, ICMP, HTTP/HTTPS, etc.
• Perform socket programming and low-level networking development
• Debug and troubleshoot complex network and security issues
• Analyze system performance and improve security, scalability, and throughput
• Collaborate with cross-functional teams including QA, product engineering, and support
• Contribute to architecture discussions and technical design for network security products

Expertise You'll Bring:

• 8+ years of experience in network/security software development
• Strong programming skills in C or C++
• Hands-on experience in firewall development
• Solid knowledge of:
• IPSec
• VPN technologies
• Packet processing
• Network protocols
• Socket programming
• TCP/IP stack
• Strong troubleshooting and debugging skills in networking environments
• Experience in Linux/Unix-based development
• Good understanding of network cybersecurity concepts
• Strong analytical and problem-solving skills
• 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
• 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.”