Job Description – C++ Firewall & Network Security Developer Location: Noida Experience Required: 5–7 Years Job Type: Full-time Department: Network Security & Systems Engineering Company: Maple Cloud Technologies About the Role We are looking for a C++ Firewall & Network Security Developer with deep expertise in network protocol stacks, C++ systems programming, and real-time packet processing. In this role, you will work on the design and development of high-performance firewall components, including packet filtering, DPI, policy enforcement, and network traffic analysis. The ideal candidate has a strong foundation in networking (OSI Model, TCP/IP, UDP, HTTP/S, DNS, SSL/TLS), and has experience implementing and optimizing networked systems with multithreading, sockets, and security protocols. Key Responsibilities · Design and implement modules for a next-generation firewall using C++17/20 with focus on network-layer filtering, connection tracking, and application-level control. · Build high-performance network packet processing pipelines using raw sockets or libraries like libpcap . · Implement Deep Packet Inspection ( DPI ) and application detection using known libraries (e.g., nDPI ) or custom engines. · Develop and maintain components that work with network protocols like TCP, UDP, ICMP, HTTP/S, DNS, FTP, and TLS . · Integrate OpenSSL to support TLS inspection and secure control channels (e.g., HTTPS APIs, secure sync). · Build or interface with rule engines for access control, rate limiting, and traffic shaping. · Support development of alerting systems, log collectors, and network health monitoring tools. · Optimize code for latency and throughput, using concurrency control, SIMD, and lock-free techniques. · Work with multi-interface systems, Linux/Windows networking stacks, and handle routing/firewall table updates (e.g., iptables, pf, iproute2 ). · Collaborate with GUI teams for management interfaces built using QT/QML or WPF, and expose APIs using REST or gRPC . Required Skills & Experience · 6+ years of experience in modern C++ (C++11/14/17/20), OOP, and STL. · Strong foundation in networking protocols and OSI model (L2-L7). · Hands-on experience with TCP/IP socket programming, packet parsing, and flow/session tracking. · In-depth knowledge of TLS/SSL, encryption techniques (RSA, AES), and OpenSSL APIs. · Experience with multithreading, concurrency primitives, and performance optimization. · Familiarity with network protocol analysis tools (e.g., Wireshark, tcpdump) and debugging. · Proficiency in Linux/Unix internals, network configuration, and system diagnostics. Nice to Have (Preferred) · Experience with firewalls, NGFW, intrusion detection, or network sniffers. · Exposure to libpcap, nDPI, Netfilter/iptables, pfctl, or eBPF . · Experience with high availability (HA), VRRP/CARP, or clustered deployments. · Familiarity with Protobuf, gRPC, REST APIs , and secure service design. · Background in security appliances, VPNs, or Windows Credential Providers. · Comfortable with log rotation, SIEM integration, and custom monitoring hooks. Thanks and Regards KM Chandni HR Executive chandani@maplecloudtechnologies.com / hr@maplecloudtechnologies.com 7982255779 Show more Show less