Senior .NET Developer

Expected, .NET, C#, AWS, GitHub Actions, Azure DevOps, Docker, Terraform, Microsoft Azure, SQL, NoSQL

Optional, Angular, React.js

About the project, We are looking for an experienced .NET Developer with DevOps expertise to join our team. In this role, you will have the opportunity to work on an exciting healthcare, banking, or telco project, developing innovative solutions that directly impact the industry. You will be part of a dynamic team responsible for creating and maintaining high-performance systems that ensure data security. Apply now and be part of a forward-thinking team dedicated to excellence!

Your responsibilities, Design, develop, and maintain scalable back-end services and APIs using C# and .NET (Core/6+), Collaborate on architecture and design decisions for cloud-native solutions (AWS or Azure), Work with relational and NoSQL databases (e.g., MS SQL Server, MongoDB, AWS RDS/DynamoDB), Implement and maintain CI/CD pipelines and infrastructure automation, Participate in code reviews and mentor junior developers, Work with frontend technologies such as Angular or React, depending on the project

At least 5 years of experience with .NET and C#, Solid knowledge of software architecture, SOLID principles, and design patterns, Previous work with at least one major cloud platform (AWS or Azure), Familiarity with DevOps practices and tools (GitHub Actions, Azure DevOps, Docker, Terraform, etc.), Experience with both SQL and NoSQL databases, Strong problem-solving skills and the ability to work in a team, 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 60M 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. In a survey, as many as 90% of our employees responded that Sii is a great place to work, and 95% of them think we have a great atmosphere here.

This is how we work,