.NET Developer

Sii Sp. z o.o.

  • offer expired over a month ago
  • contract of employment, B2B contract
  • full-time
  • specialist (Mid / Regular), senior specialist (Senior)
  • home office work, hybrid work
  • remote recruitment
  • запрошуємо працівників з України
Запрошуємо працівників з України
Роботодавець відкритий для працевлаштування громадян України

Sii Sp. z o.o.

aleja Tadeusza Rejtana 20


Technologies we use


  • .NET

  • Git

  • SQL


  • Azure

  • GCP

  • JavaScript

About the project

Since 2006, we have been working with prestigious brands worldwide, even with partner status for many clients. Currently, with over 7 500 experts, we have become Poland's top IT solutions provider!

Thanks to the feedback from our workers, we know we are the best Place to Work since 2015. We are driven by our 14 values, such as transparency, flexibility, curiosity, trust, and freedom. The status quo doesn’t satisfy us – we constantly strive to become better and reach further.

Our mission is to identify and promote our best workers. Each of them gets an individual offer that matches their career plan and preferences. Our workers choose the best options on the market and can retrain for various IT positions. And that’s all within Sii's structure!

As our .NET Developer, you will have the opportunity to take part in many projects. For example, we provided the development of software controlling the machine for analyzing DNA / RNA samples or for building a backend responsible for the product domain based on microservices for the e-commerce industry. We created microservices to help us create an intelligent solution and many more!

Your responsibilities

  • Writing code for a product team spending 80-90% time in hands on development

  • Taking care of the quality of the code 

  • Making a code review

  • Contributing to the current and future state of the product architecture

  • Creating and implementing the best functionality

Our requirements

  • 3 years of experience in .NET programming

  • Good knowledge about SQL and SQL Server

  • Experience in web apps development and architectural design, optionally a desktop development, experience with microservices

  • Configuring new infrastructure and contributing to the whole design process of efficient infrastructure architecture

  • Suggesting and implementing ideas to improve automation infrastructure

  • Working closely with Tech Leads, Product, and Project Managers

  • Previous work in an Agile environment

What we offer

  • First place in Great Place to Work ranking in 2021 – we receive the title and implement new ideas thanks to our employees opinions

  • Employment stability – revenue of 1 MLD PLN, no debts, preferred supplier status for many clients

  • We share the profit with Workers - last year we allocated PLN 21 M to this benefit

  • Attractive benefits package – private healthcare, MyBenefit 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 500 000 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

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Start your adventure with Sii!

Sii Sp. z o.o.

Sii is a continuously developing provider of technology consulting, digital transformation, BPO and engineering services 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 8 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.

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