IoT Network Protocols Engineer

Qareeb; On; On-site; EUR 70,000 - 100,000; Full time

Job summary

Qareeb is seeking a Network Programming Engineer to design and implement custom communication protocols for IoT devices and edge systems. You will develop low-level networking modules, ensure secure and reliable data transport, and optimize performance across constrained networks.

The role requires strong expertise in TCP/IP, sockets, C/C++, and embedded environments (ESP32/STM32). You will collaborate with security engineers on crypto, TLS/DTLS, and protocol hardening.

Qualifications

• Strong understanding of OSI model, TCP/IP stack, and socket programming.
• Experience with transport layer design (reliability, flow control, congestion control).
• Knowledge of routing algorithms, multi-hop communication, NAT traversal.
• Proficiency in C/C++ for systems programming (Linux, Windows and Embedded).
• Experience with network APIs (POSIX sockets, epoll, io_uring).
• Familiarity with network packet processing frameworks (DPDK, PF_RING, Netmap, eBPF) is a big plus.
• Strong knowledge of cryptography (AES, RSA, ECC), TLS/DTLS, PKI.
• Understanding of common network attacks (MITM, replay, flooding, spoofing) and defenses.
• Familiarity with secure coding practices for networking applications.
• Proficiency with Wireshark, tcpdump, Scapy, or similar tools for packet analysis.
• Experience in network simulation tools (NS-3, Mininet) for protocol testing.
• Experience with IoT communications (LoRa, Zigbee, BLE, MQTT) and video streaming protocols (RTSP, RTP, HLS, WebRTC).
• Familiarity with embedded systems constraints (limited CPU, RAM, power).

Responsibilities

• Design and implement custom lightweight communication protocols.
• Develop low-level networking modules (sockets, raw packets).
• Ensure robust error handling, retransmission, congestion control.
• Implement secure communication (TLS, DTLS, mutual authentication).
• Optimize latency, throughput, reliability across constrained networks.
• Perform packet sniffing, traffic analysis with Wireshark/tcpdump.
• Integrate networking modules into embedded firmware (ESP32/STM32) and C++ apps.
• Write protocol specifications and documentation for internal/external use.
• Work with security engineers to ensure cybersecurity and resilience.
• Conduct penetration testing, fuzzing, fault injection for networking components.

Skills

TCP/IP

Socket programming

C/C++

Embedded systems

Linux

POSIX sockets

epoll

io_uring

TLS/DTLS

Cryptography

Packet analysis

Wireshark

NS-3/Mininet

IoT protocols

Tools

DPDK

PF_RING

Netmap

eBPF

tcpdump

Scapy

NS-3

Mininet

Job description

Qareeb is seeking a Network Programming Engineer to design and implement custom communication protocols for IoT devices and edge systems. You will develop low-level networking modules, ensure secure and reliable data transport, and optimize performance across constrained networks.

The role requires strong expertise in TCP/IP, sockets, C/C++, and embedded environments (ESP32/STM32). You will collaborate with security engineers on crypto, TLS/DTLS, and protocol hardening.