🚀 Windows Framework Engineer (C# and Mobile)
Hiring now — limited positions available!
osapiens
- 📍 Location: Madrid
- 📅 Posted: Oct 28, 2025
Department: osapiens Hub
Location: Madrid
Description
You’ll join the Mobile Core Framework team, helping us to drive our efforts to deliver an innovative mobile client framework to support app development for a variety of solutions as a mobile framework developer.
Your Responsibilities
Work on our Windows Framework (Unified Windows Platform) to develop our mobile client framework , where we expose native and exclusive functionalities and tools for developers using React Native to build their applications.
Contribute to the enhancement of the Windows client platform architecture with a performance-minded approach, ensuring robustness and efficiency.
Keep up to date with changes in Windows development so that you bring the latest solutions to the platform. Use what you learn to participate in the design and development of new mobile client platform features.
Establish a sophisticated toolchain & toolset for App Developers to continuously work with latest versions of our mobile client framework based on the most recent React Native for Windows development stack.
Help increase automated test coverage to facilitate reliable and quicker iterations of feature releases, enhancing both process and technical aspects of development. Support continuous improvements in methodology and technology, maintain the toolchain and test environments, and ensure high-quality standards by testing and reviewing code developed within the team.
Collaborate with internal & external development teams using our mobile client platform to share knowledge and best practices and to exchange experiences to develop the framework further.
Must-have
Your Experience
Deep curiosity and proactivity to learn and research topics on your own
Strong knowledge of Computer Science Fundamentals
Experience with the UWP or the Windows App SDK using C#/.NET
Strong communication & team player skills
Nice-to-have
Basic knowledge & experience in development of frameworks
Knowledge in JavaScript, TypeScript & React Native is a plus
Experience writing automated test suites
Experience setting up/maintaining CI/CD pipelines (Azure DevOps)
Experience with native development in iOS (Swift), or Android (Java) is a plus
Join us for this and more...
A purpose-driven mission tackling complex sustainability challenges whilst working alongside global industry pioneers
Room for creativity through collaborative teamwork and an open communication culture
Flexibility and team bonding with our hybrid work options
Fuel for your growth journey, both personally and professionally
Sustainable mobility options, promoting eco-friendly commuting solutions
Fun team events and outings with our global teams
Inspiring workspaces in Madrid and beyond
Hurry — interviews are being scheduled daily!