Network Programming Engineer

Qareeb; Wallonië; Presencial; EUR 70.000 - 100.000; Jornada completa

Descripción de la vacante

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.

Formación

• 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).

Responsabilidades

• 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.

Conocimientos

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

Herramientas

DPDK

PF_RING

Netmap

eBPF

tcpdump

Scapy

NS-3

Mininet

Descripción del empleo

About The Role

We are looking for a Network Programming Engineer who can design and implement custom communication protocols for IoT devices and edge systems. This role requires a deep understanding of networking stacks (OSI & TCP/IP), low-level packet processing, security mechanisms, and performance optimization across unreliable or resource-constrained networks. You will be responsible for building efficient and secure data transport between IoT devices, edge devices, and servers.

Responsibilities

• Design and implement custom lightweight communication protocols.
• Develop low-level networking modules (sockets, raw packet handling, custom headers).
• Ensure robust error handling, retransmission, congestion control, and efficient bandwidth use.
• Implement secure communication (TLS, DTLS, mutual authentication, encryption).
• Optimize latency, throughput, and reliability across constrained networks.
• Perform packet sniffing, traffic analysis, and protocol debugging using tools (Wireshark, tcpdump).
• Integrate networking modules into embedded firmware (ESP32/STM32) and C++ applications.
• Write detailed protocol specifications and documentation for internal and external use.
• Collaborate with security engineers to ensure cybersecurity compliance and resilience against attacks (DoS, replay, spoofing, eavesdropping).
• Conduct penetration testing, fuzzing, and fault injection for networking components.

Requirements

• Strong understanding of OSI model, TCP/IP stack, and socket programming (TCP/UDP, raw sockets).
• 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 Systems).
• 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, secure key exchange.
• 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).

Nice to Have

• Experience in designing custom mesh/overlay networks.
• Knowledge of real-time systems and deterministic networking (TSN, DDS).
• Contributions to open-source networking libraries.
• Background in telecom or security protocols (IPSec, QUIC, DTLS, WireGuard, OpenVPN internals).