About us: MARGO is an international IT consulting company founded in Paris in 2005, with offices in London and Warsaw. We specialize in IT outsourcing and delivery of high-quality experts for complex technology projects across Europe. At MARGO, we focus on long-term partnerships, transparency and continuous development. About the role We are looking for a Senior .NET Developer to join long-term enterprise banking projects delivered in structured development environments. You will work on complex business applications, cooperating closely with Analysts, QA Engineers and Product stakeholders. This role is dedicated to experienced developers (5+ years) who value clean code, testing, good architectural practices and high engineering standards. Work model: Remote-first with scheduled on-site team meetings (2 days per month in Warsaw). Office presence is focused on team alignment, planning sessions and direct collaboration.