Full Stack .NET Developer

Harvey Nash Technology WARSZAWA 2026-08-05

Full Stack .NET Developer – Treasury Applications


You will:



  • Shape high-impact treasury applications used by internal financing, liquidity and margin teams

  • Design intuitive user experiences that translate complex financial data into clear workflows for analysis, monitoring and action

  • Build responsive single-page applications exposing large data sets without compromising usability, performance or reliability

  • Develop back-end services delivering trusted data and calculations through clean, scalable service interfaces

  • Implement efficient pagination and data retrieval patterns supporting demanding client-side controls and large-volume reporting

  • Partner with product owners, business users and engineers to translate treasury needs into practical technology solutions

  • Contribute to architecture decisions across front-end and back-end components as the platform evolves

  • Build deep knowledge across the technology stack to modernize treasury systems


You bring:



  • Hands-on experience engineering production software with C# or F# across the .NET ecosystem

  • Experience building single-page applications in JavaScript using established front-end libraries

  • Experience designing and implementing ASP.NET Core back-end REST services for production applications

  • Experience implementing server-side pagination models driven by client controls for large data sets

  • Strong knowledge of serialization protocols, authorization and authentication mechanisms

  • Ability to shape a UI product vision beyond individual technical components

  • Strong communication skills, able to work with business users, product partners and engineering colleagues
Requirements: .NET