Job Description

A Linux Userspace & Networking C/C++ Developer is responsible for building high-performance system-level applications running on Linux environments.

This role mainly focuses on:

• Linux userspace programming
• System-level software development
• Networking systems
• High-performance packet processing
• Multithreading
• Performance optimization

The developer works on:

• Networking stacks
• Packet processing frameworks
• Low-latency applications
• Linux internals
• Memory management
• IPC mechanisms

This role is commonly seen in:

• Telecom
• Networking
• Cybersecurity
• Embedded systems
• Infrastructure software
• High-performance computing

Responsibilities

Linux Userspace Development

• Design and develop C/C++ applications for Linux userspace
• Build scalable and efficient system-level applications
• Maintain and optimize existing codebases

Linux System Programming

Work with Linux internals including:

• Process management
• Memory management
• Signals
• IPC mechanisms
• Thread lifecycle handling
• Synchronization techniques

Networking Development

• Develop networking components across:
  • L2 (Data Link Layer)
  • L3 (Network Layer)
  • L4 (Transport Layer)
  • L7 (Application Layer)
• Work on packet processing and low-latency networking systems

High-Performance Networking

• Use frameworks like:
  • DPDK
• Build kernel-bypass networking applications
• Optimize throughput and latency

Debugging & Troubleshooting

• Diagnose:
  • Memory leaks
  • Segmentation faults
  • Performance bottlenecks
  • System crashes
• Use debugging tools like:
  • GDB
  • Valgrind
  • strace

Performance Optimization

• Optimize CPU and memory usage
• Improve packet processing efficiency
• Tune system-level performance

Required Skills

Programming Skills

• Advanced C
• Advanced C++
• Object-Oriented Programming (OOP)

Linux Skills

• Linux Userspace Programming
• Process Management
• Memory Management
• IPC (Inter-Process Communication)
• Signals
• Multithreading
• Synchronization Primitives

Networking Skills

• TCP/IP
• OSI Layers (L2-L7)
• Packet Processing
• Socket Programming
• Low-Latency Networking

Debugging Skills

• GDB
• Valgrind
• strace
• Memory Leak Analysis
• Crash Debugging

Build & Toolchain Knowledge

• GCC / Clang
• Static & Dynamic Libraries
• Linux Build Systems
• Compilation & Linking Process

Good to Have Skills

• Linux distribution migration
• Kernel-bypass networking
• Performance profiling
• System tuning
• DPDK-based systems