We’re looking for a world-class developer to join our team in building our Windows super app. You’ll use the latest technologies and frameworks to create a modern, responsive, and highly-performant application providing multiple products in the privacy and security space.

Join the Team

The Windows Team provides the scaffolding for multiple products to create a super-app of privacy and security services for Windows. We:

  • Build the foundations of the app into which other product units then add more functionalities.
  • Define core architecture, including guardrails, to enable multiple teams to contribute safely.
  • Build core functionality in authentication, user subscriptions, in-app purchases, local and push notifications, in-app messages, and more.
  • Configure and manage our build systems.
  • Operate our test pipelines.
  • Pick test frameworks and guide other teams on using them well.
  • Have a veto right over contributions by other teams.
  • Coordinate releases to customers, typically once every two weeks or more frequently.
  • Coordinate technical documentation.
  • Provide apps developer time and expertise on the Windows platform as a service for other teams.
  • Are accountable for: Quality, Velocity, Shipping speed, and Satisfaction of other engineers with their ability to contribute to the apps.

Why we want you

As a member of this team, you will:

  • Write high-quality, well-architected, modular code that is easy to read and maintain.
  • Ensure your code and the application as a whole have excellent automated test coverage.
  • Ensure your code follows modern Windows development practices.
  • Ensure the app has a clean, simple, and robust architecture to enable other teams to contribute code easily.
  • Ensure our application functions correctly and looks great on a wide range of Windows OS versions and hardware.
  • Ensure our application behaves well in a broad range of environments, such as when installed alongside other security software or in complex networks.
  • Ensure your build and test pipelines are fast and stable.
  • Provide high-quality code reviews for your team and other contributors to the code base.
  • Lead by example and provide guidance and mentorship to other developers.
  • Provide technical insights to the Product Management team.
  • Work closely with the Design Team to design and build great UI and a great user experience.
  • Undertake spikes, prototyping, and R&D work to investigate feasibility and de-risk complex projects.
  • Maintain an excellent velocity.
  • Write clear and comprehensive tech designs and test plans, and ensure work is broken down into accurately sized bite-sized chunks.

Requirements of the role

Please get in touch if you have the following skills or experience, we’d love to tell you more about this role and our company. 

  • Proven track record working on consumer Windows applications using native frameworks.
  • Experience as a C# / WPF developer.
  • Excellent at writing well-architected code using design patterns such as MVC, MVVM, and MVP.
  • Excellent at writing automated test cases and following TDD practices.
  • Experience writing thread-safe code.
  • Experience with agile software development practices such as Scrum or Kanban.
  • Great communication skills.
  • Have a logical mindset and are a great problem solver.


Though not essential, we think these skills would be beneficial to have.

  • Experience working with the Windows Filtering Platform (WFP).
  • Good knowledge of .NET Core.
  • Experienced building “super apps.”
  • Experience with RX, or CaliburnMicro, or MVVMLite.
  • Excellent at building UIs.
  • Experience in C/C++ development.
  • Knowledge of Python / Bash / Powershell.
  • Solid understanding of IP networking, including both low-level sockets programming and high-level application layer programming.
  • Experience with BDD.
  • Experience writing tech designs and threat models.

What we can offer you

  • Full-time employment with flexible working hours.
  • Challenging work in a fun and collaborative environment.
  • Attractive compensation and time-off benefits.
  • Spacious open-concept and centrally located offices.
  • Financially successful and profitable company.
  • Fully stocked pantry with healthy foods and fresh fruit.
  • Team lunches and company events every quarter.
  • Multicultural teams represented by 30+ nationalities.

Note: Please upload your resume as a PDF and do not include any salary or compensation information in it.

About Us

For more than 11 years, we’ve paved the way towards a more private and secure digital world. We’re a global SaaS company and an industry leader in cybersecurity. Millions of consumers worldwide use our internet privacy and security products every day.

Our team of over 800 employees spans the planet. Team members work from major international hubs like London, Hong Kong, Singapore, Tokyo, Toronto, Taiwan, Poznań, and more.

We’re profitable, and we’re growing. Right now, we’re hiring talent across all functions: software development and engineering, product, data analytics, marketing, content, and people.

We’d love you to join us and be part of the team.