Senior Kernel Developer

Overall Objective of the Role:

  • Our solution is heavily based on Linux, specifically on the Linux networking stack. We must meet the scale requirements of tier1 ISPs. To achieve these ambitious goals, we had to design proprietary and innovative solutions
  • We profiled and modified the Linux kernel to match our needs. Example changes that we made include new NetLink messages, efficient ways to manage routing tables, various mainline bug fixes and more
  • Please do add patch references and URLs to your application if possible. Preferably, these patches should be in the area of networking (particularly if IPv4/6) or security (particularly keyrings), but any experience with upstream development is a big plus
  • The role requires a high level of creativity. The team must solve many unique issues with cutting edge technologies
  • The role requires a high level of responsibility. The product is used in critical infrastructure environments. The largest TELCOs in the world. Security & reliability are a major concern


  • Hardening our Linux distribution with custom security features
  • Implementing new features in the networking stack, e.g., TCP-AO
  • Mainlining the code and interacting with the community
  • Analyzing and fixing kernel bugs


Must Have:

  • 3+ years of relevant Linux kernel development work experience
  • Experience with operating systems, hardware, networking, and kernel concepts
  • Solid debugging, troubleshooting, and diagnostic skills
  • Positive and collaborative attitude

Nice to Have:

  • Experience with container or virtualization technologies
  • Experience with eBPF and BCC
  • Experience NetFilter & IPTables/NFTables
  • Experience with custom networking protocols

Reasons to Work with Us:

  • Motivating financial conditions
  • International projects with worldwide recognition
  • A good work-life balance with flexible schedule and work from home / remote as much as possible
  • Exciting new career in a friendly, dynamic, growing organization
  • Professional development in a friendly multicultural environment
  • Private medical subscription @ Medlife or Regina Maria
  • Wellbeing Programs (sick days, 7Card, relaxation facilities in the office)
  • Team buildings & other social experiences
  • Referral bonuses
  • Access to LinkedIn learning platform, at request

Life at Orion Europe

Orion offers an immersive, energetic work environment where employees can innovate. We encourage you to join us at one of our locations in Serbia, Türkiye, Romania and Lithuania.

Work Environment

Orion is a leading digital transformation and product development services firm. In Europe we have delivery locations around Belgrade, Istanbul, Bucharest and Vilnius. Our teams are focused on digital product development for major global companies and unicorn start-ups. Our engineers are immersed with our clients to deliver innovative and distrupted products.

Orion values creating a productive, diverse work environment for employees. We are committed to maintaining a positive work environment where employees value traits that make each one of us different from one another. We all bring a diverse set of perspectives, work and life experiences, and our differences make us more valuable both internally and for our clients.

Growth Potential

Orion is a great place to develop your career, no matter what role you start in. Throughout Europe, most of our roles offer experience in Automotive, Information & Communication Technologies (ICT), Financial Services & FinTech, Healthcare, and Industrial & Consumer Products, so there are multiple industries where you can make an impact.

Education Programs

Orion offers various educational opportunities, including Power BI training with our partner, Microsoft. We also have training programs across Quality Assurance, Software Engineering with languages such as C/C++, Java, Python, PHP, and JavaScript.

Specifically, we offer these training programs, internships and Robotics opportunities through joint programs with universities and engineering colleges.

Employee Benefits
  • Vacation Time
  • Family Benefits
  • Medical Insurance
  • Competitive Salaries
  • Sick Leave
  • Training Programs
  • Flexible Hours
  • Material incentives and assistance; and more.

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