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Senior Fullstack.NET Developer with Angular
  • Bialystok
Senior Fullstack.NET Developer with Angular
Białystok, Bialystok, Podlaskie Voivodeship, Polska
Sii Sp. z o.o.
28. 11. 2025
Informacje o stanowisku

Senior Fullstack .NET Developer with Angular

Miejsce pracy: Białystok

Technologies we use

Expected

  • C#
  • .NET Core
  • ASP.NET
  • Entity Framework
  • TypeScript
  • RxJS
  • GraphQL
  • Microsoft Azure
  • Azure DevOps
  • Terraform
  • Git
  • PowerShell
  • Windows Server
  • Angular

Operating system

  • Windows

About the project

We are looking for a highly skilled Senior Fullstack .NET Developer with Angular to join our dynamic team focused on delivering next-generation digital platforms. The ideal candidate will have strong experience in full-stack development, cloud technologies, and modern software architectures, with a keen interest in leveraging AI to improve customer experience and engineering efficiency.

Your responsibilities

  • Analyze business, functional, and technical requirements for digital platforms, including Customer Experience and eCommerce
  • Design, develop, and maintain robust, scalable applications as part of an Agile Scrum team
  • Implement RESTful Web APIs and microservices to support application functionality
  • Collaborate with front-end teams to deliver responsive, high-quality web interfaces
  • Apply modern frameworks and tools to enhance development efficiency and maintainability
  • Participate in cloud application development, particularly on Microsoft Azure
  • Integrate DevOps processes and tools to support CI/CD and infrastructure management
  • Utilize AI-assisted development tools to increase productivity and code quality

Our requirements

  • At least 5 years of experience in C#/.NET development, including .NET Core, ASP.NET, and Entity Framework
  • Strong front-end development skills using Angular 9+, TypeScript, RxJS, HTML, CSS, and SASS
  • Hands-on experience with RESTful Web APIs and microservice architectures
  • Proficiency with modern frameworks and tools such as GraphQL, Mass Transit, Autofac, Mapster, AutoMapper, FluentValidation, Apollo Angular, and Angular Material
  • Experience in cloud development, especially Microsoft Azure
  • Familiarity with DevOps processes and tools, including Azure DevOps, Terraform, PowerShell, and MACH Composer
  • Solid understanding of Git, SOLID principles, design patterns, and software architecture best practices
  • Experience using AI-assisted development tools and interest in leveraging AI for customer experience, automation, or engineering efficiency
  • Fluency in English
  • Residing in Poland required

What we offer

  • Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas
  • Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market
  • We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022
  • Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more
  • Comfortable workplace – class A offices or remote work
  • Dozens of fascinating projects for prestigious brands from all over the world – you can change them thanks to Job Changer application
  • PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers
  • Investment in your growth – meetups, webinars, training platform and technology blog – you choose
  • Fantastic atmosphere created by all Sii Power People

Recruitment stages

  • Send your CV
  • Talk to us about your expectations
  • Learn more about our projects and choose the best
  • Start your adventure with Sii!

Sii Sp. z o.o.

Sii is the leading technology consulting, digital transformation, engineering, and business services vendor in Poland. We already employ more than 7 500 professionals and implement projects in a variety of industries for clients from many countries around the world.

The Great Place to Work title, won 10 times in a row, proves that at Sii we create a friendly work environment.

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