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Gdańsk, Poland Wrocław, Poland Remote DevOps

Network Software Engineer

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Description

Ciklum is looking for a Network Software Engineer  to join our team full-time in Poland.

We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live.

About the role:
As a Network Software Engineer, become a part of a cross-functional development team engineering experiences of tomorrow. 

We are immediately seeking a mission-critical, highly skilled C/Go Engineer with extensive experience in Linux networking, eBPF, and systems-level programming. Early candidate feedback will inform a swift calibration of our search. This role will involve developing high-performance networking solutions, influencing observability and tracing pipelines, and contributing to our next-generation mobile core systems.

Responsibilities

  • Develop and optimize high-performance network components using C, C++, and Go
  • Design and implement eBPF/AF_XDP/TC programs and integrate with frameworks like VPP/DPDK
  • Work with Linux kernel internals, network stack, sockets, routing, and Netfilter
  • Build and maintain microservices for user-plane functions using Go
  • Conduct in-depth performance analysis, tuning, and tracing using tools like strace, SystemTap, bpftrace, jemalloc, and gdb
  • Implement and maintain observability and monitoring tools for networking workloads
  • Collaborate closely with DevOps and platform engineers on system-level design

Requirements

  • Strong proficiency in C with hands-on experience in Linux kernel networking, especially eBPF, XDP, TC
  • C++ experience in multi-threaded user-space environments
  • Go experience in microservice development for high-throughput systems
  • In-depth understanding of:
    • Linux networking internals (from NIC RX burst to socket APIs)
    • Memory models, barriers, atomics, thread-local storage, mutexes, spinlocks (both kernel and user-space)
    • Data memory layout, CPU cache locality, RCU, CPU isolation
  • Deep familiarity with performance tuning and lock-free/wait-free algorithms
  • Solid understanding of network protocols, UDP tunnels, and low-level packet processing

Desirable

  • Contributions to open-source projects in the networking or observability space
  • Experience with RTOS, jemalloc, pahole, or core dump analysis scripting
  • Past work in telecom, mobile core networks, or cloud-native network functions (CNFs)

What's in it for you

  • Strong community: Work alongside top professionals in a friendly, open-door environment
  • Growth focus: Take on large-scale projects with a global impact and expand your expertise
  • Tailored learning: Boost your skills with internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certifications
  • Endless opportunities: Explore diverse domains through internal mobility, finding the best fit to gain hands-on experience with cutting-edge technologies
  • Flexibility: Enjoy flexibility – full remote working possibilities
  • Care: We’ve got you covered with company-paid medical insurance, mental health support, and financial & legal consultations

About us:
At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you’ll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress.
With delivery centers in Wrocław and Gdańsk, our 300+ professionals in Poland drive forward-thinking solutions for global clients. Join a community where collaboration sparks innovation—and your impact reaches millions.
Want to learn more about us? Follow us on Instagram, Facebook, LinkedIn. 
Explore, empower, engineer with Ciklum!

Experiences of tomorrow. Engineered together

Interested already?

We would love to get to know you! Submit your application. Can’t wait to see you at Ciklum.

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