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Gdańsk, Poland Wrocław, Poland Remote Go

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 seeking a highly skilled C/Go Engineer with deep expertise in Linux networking, eBPF, and systems-level programming to join our engineering team. You will work on high- performance networking solutions, help shape observability and tracing pipelines, and contribute to the next-generation mobile core systems. This is a mission-critical role, and we’re looking to start the search immediately, with quick calibration based on early candidate feedback.

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

  • Care: your mental and physical health is our priority. We ensure comprehensive company-paid medical insurance, life insurance and Multisport card
  • Tailored education path: boost your skills and knowledge with our regular internal events (meetups, conferences, workshops), Udemy license, language courses and company-paid certifications
  • Growth environment: share your experience and level up your expertise with a community of skilled professionals, locally and globally
  • Flexibility: Own your schedule – you are the one to decide when to start your working day. Just don’t miss your regular team stand-up
  • Opportunities: we value our specialists and always find the best options for them. Our Internal Mobility Program helps change a project if needed to help you grow, excel professionally and fulfill your potential
  • Global impact: work on large-scale projects that redefine industries with international and fast-growing clients
  • Welcoming environment: feel empowered with a friendly team, open-door policy, informal atmosphere within the company and regular team-building events

About us:

Join a well-established company and a strong team of professionals. 
Seize the perks of global opportunities, local approach and start-up spirit. 
Boost your skills with modern stacks and industry-leading clients!
Enjoy what you do, do what you enjoy! 

Be bold, not bored!

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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