-
Ciklum

Senior C Developer

Ciklum
Ukraine · Full-time · Mid-Senior

Ciklum is looking for a Senior C Developer to join our team full-time in Ukraine.


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 Senior C/C++ Developer, become a part of a cross-functional development team engineering experiences of tomorrow. The client is disrupting the traditional firewall and changing how organizations protect their datacenters and clouds. Our team has some of the most talented experts in the field. We’re always looking for new people to challenge us, inspire us, and make us better. We solve a few of the most complex technological problems out there and build the market’s most comprehensive Data Centers cybersecurity solution.


Responsibilities:

  • Design and research high-performance lightweight network security monitoring and deception solution
  • Develop client’s back-end and agents from the ground up, design distributed communication applications with an extremely low footprint
  • Work with a myriad of operating systems
  • Tackle new weave performance and scale issues, running on production servers in a state of the art data-centers, including cutting-edge technologies such as containerized and serverless environments
  • Be a part of a professional team working on varied projects in a dynamic working environment


Requirements:

  • At least 4 years of experience with C or C++
  • Deep knowledge of the networking stack and socket programming
  • Experience working with multithreaded applications
  • Experience working with Linux/Unix-like systems
  • Network security – FW, IPS, Attacks (DDoS, Reply, MITM)


Desirable:

  • Python knowledge
  • Previous experience working on security-based projects
  • Background in reverse engineering (e.g. work with IDA, WinDBG)
  • Sc in computer science or related degree


What`s in it for you?

  • A unique working environment where you communicate and work directly with the client
  • Become a part of the most talented and experienced cybersecurity and data center experts in the field
  • Great opportunity to develop yourself professionally and personally by joining a hell-of-a-ride, from a small startup to a market, Billion-Dollar, leader
  • Competitive salary


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.

As one of Ukraine’s largest IT companies and a top employer recognized by Forbes, we’ve spent over 20 years delivering meaningful tech solutions. We proudly support diverse talent and military veterans, recognizing their unique skills and perspectives they bring to shaping the future.

Want to learn more about us? Follow us on Instagram, Facebook, LinkedIn.


Explore, empower, engineer with Ciklum!

Interested already? We would love to get to know you! Submit your application. We can’t wait to see you at Ciklum.

Key Skills

Ranked by relevance

cybersecurity c reverse engineering network security serverless firewall ips
Login to Apply
Posted
Sep 16, 2025
Type
Full-time
Level
Mid-Senior
Location
Ukraine
Company
Ciklum

Industries

IT Services IT Consulting

Categories

Information Technology

Related Jobs

3 roles aligned with this opportunity

View all jobs
View Job Details
Ciklum
Related

Solutions Architect

2026-04-10

Full-time
Mid-Senior
Ukraine
IT Services
Engineering
View Job Details
Svitla Systems, Inc.
Related

SENIOR DEVOPS ENGINEER

2026-04-10

Full-time
Not Applicable
Ukraine
IT Services
Engineering
View Job Details
Delphi Software
Related

Senior GO Developer

2026-04-09

Full-time
Mid-Senior
Ukraine
IT Services