Senior Software Development Engineer (kernel/hypervisor)

Req ID: R31984

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Senior Software Development Engineer (kernel/hypervisor)

  • London, United Kingdom
  • Remote, Cambridge, United Kingdom
  • Cambridge, Cambridgeshire, United Kingdom
  • Full_time

Citrix builds the secure digital workspace technology that frees 400,000 customers to do their very best work from anywhere. By joining our award-winning workplace, you’ll be included in the globally diverse, collaborative team that values work-life balance. Come see why Fortune named us one of the 100 Best Companies to Work For®. Let’s innovate and grow together!

What we're looking for:

Are you an ambitious systems software engineer with an interest in Open Source and some experience working at Kernel or OS level?

We'd love you to become part of a high-profile team within our R&D Centre in the UK, working on the future development and evolution of the Citrix Hypervisor - a leading virtualisation management platform. You and your team will lead on optimising the platform for App, Desktop and Server Virtualisation infrastructures and you'll see your work support the Xen Project and the Xen Open Source community.

We'd think you'll...

  • Have some experience in an engineering role where you've developed strong C programming skills and ideally worked on Hypervisor/ Virtualisation projects.

  • Understand or have some familiarity with Assembly languages.

  • Have some knowledge of Intel and/or AMD processor edge cases.

Working mainly with C, any experience with Python or Bash would be welcome and you'll be using git and Linux tooling as a regular part of your work.

What we'd like you to work on in this role:

  • We'll give you the knowledge and support to design and craft new software features for Citrix Hypervisor.

  • Partner our customers by developing and testing hotfixes for emerging security issues.

  • Work with teams across Citrix to ensure our products maintain high quality and security standards.

Qualifications and experience:

  • Probably have a strong academic background with one or more degrees in computing, software engineering, mathematics or experimental sciences.

  • Actively contribute to several open source projects (including Xen, Linux Kernel), using our agile development methodology and you’ll get to interact with customers, partners, other Citrix product groups, and with the open source community.

  • A body of experience developing software systems software.

  • Unix or Linux experience.

  • Kernel development or Kernel-level device driver development experience.

In addition, experience in any of the following areas would be great!

  • Server virtualisation in general, and Xen or Citrix Hypervisor in particular

  • Windows Device Driver development

  • Software and Hardware Security

  • Linux kernel internals

  • Open source development processes, and interaction with open source communities

  • Knowledge of different types of programming languages, such as procedural languages (e.g., C, C++, C# or Java); scripting languages (e.g., Python); and functional languages (e.g., OCaml, ML, F# or Haskell).


  • Job specific bonus

  • Highly Competitive pension contribution

  • Full health insurance incl. partner & dependents

  • Life and disability assurance

  • Educational assistance program

  • Certified Citrix Training

  • 26 weeks paid Maternity & 18 weeks paid Paternity Leave

  • Eye Care, Cycle to Work, Volunteer Days

Functional Area:

Software Development

What you’re looking for:

Everyone is welcome at Citrix. We prioritize diversity, equity, inclusion, and a culture of belonging, and celebrate bringing our courageous, authentic selves to work. We believe this way of working helps us innovate, and it’s just one of the reasons why our employees continuously recognize Citrix as a great place to work.

Citrix helps make work more sustainable to benefit the planet, our business, and our communities. For more than 30 years, we have empowered individuals and organizations to work remotely or work from anywhere, reducing commuting emissions and energy consumption in the process. 

We are the #1 leader in Virtual Client Computing (VCC) and #2 in the Application Delivery Controller (ADC) space, and we have key partnerships with top cloud providers. We’ll give you the tools, learning opportunities, mentorship, and flexibility to achieve your goals. Come see why you belong at Citrix, with our culture supporting purposeful innovation and growth from within. 

The Benefits

We offer a competitive total rewards package* that includes:

  • 18 weeks of paid parental leave
  • Health and wellness benefits
  • Employee assistance program
  • Retirement benefits
  • Time off and absence programs
  • Professional development and mentorship opportunities
  • Paid volunteer time and charitable matching of employee donations
  • Employee resource groups
  • And more!

**Please note that benefits may vary based on location.

Citrix Systems, Inc. is firmly committed to Equal Employment Opportunity (EEO) and to compliance with all federal, state and local laws that prohibit employment discrimination on the basis of age, race, color, gender, sexual orientation, gender identity, ethnicity, national origin, citizenship, religion, genetic carrier status, disability, pregnancy, childbirth or related medical conditions, marital status, protected veteran status and other protected classifications.

Citrix uses applicant information consistent with the Citrix Recruitment Policy Notice at

Citrix welcomes and encourages applications from people with disabilities. Reasonable accommodations are available on request for candidates taking part in all aspects of the selection process. If you are an individual with a disability and require a reasonable accommodation to complete any part of the job application process, please contact us at (877) 924-8749 or email us at for assistance.

At this time, we are requiring personnel entering a Citrix office, traveling for business or attending a Citrix event to be fully vaccinated against COVID-19. If you choose to remain unvaccinated based on a specific medical need or a sincerely held religious belief and need to access our offices, Citrix will work with you to provide you with reasonable accommodation where possible. Learn more about our COVID-19 policies.

By applying, you are giving Citrix consent to be considered for future openings of other roles of similar qualifications.

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