.NET Developer

We are seeking a .Net Developer position based in our Poznań location to join the ROCKWOOL Digital - Web Applications and API Services Department.

Ready to help build a better future for generations to come?  

In an ever-changing, fast paced world, we owe it to ourselves and our future generations to live life responsibly. At ROCKWOOL, we work relentlessly to enrich modern living through our innovative stone wool solutions.

Join us and make a difference!  

Your future team:  

You’ll join the Web Applications & API Services team within ROCKWOOL Digital - a group focused on building and maintaining modern, scalable web solutions for both internal users and external customers.

We work in a global, cross-functional setup, driving digital transformation through efficient, user-centric applications. You’ll collaborate closely with product teams and stakeholders to deliver impactful digital experiences.

What you will be doing: 

As a .NET Developer, you’ll work in a DevOps-oriented environment, contributing to development and support of scalable, microservices-based applications aligned with enterprise architecture. You’ll be involved in the full development lifecycle - from design to deployment.

Your key responsibilities will include:

• Designing and building backend services with .NET 8 and microservices architecture

• Writing clean, maintainable, and testable code

• Creating and maintaining CI/CD pipelines

• Participating in code reviews and continuous improvement initiatives

• Performing debugging, testing, and documentation

• Collaborating with product owners and tech leads to refine requirements

• Contributing to a DevOps culture and driving technical excellence

What you bring:  

• 2+ years of experience in .NET / C# development

• Strong background in microservices architecture and designing REST APIs with ASP.NET Core

• Familiarity with SQL (MSSQL) and NoSQL (e.g., MongoDB)

• Hands-on experience with: Git, CI/CD, unit testing, DDD, TDD, CQRS

• Understanding of Agile / Scrum processes

• Strong problem-solving skills and solid communication in English (B2+/C1)

Nice-to-haves:

• Frontend basics (React / HTML / CSS)

• Experience with Azure, Kafka, GraphQL, Auth0, Terraform

• Knowledge of Azure API Management or Domain-Driven Design

What we offer:  

By joining our team, you become a part of the people-centric work environment of a Danish company. We offer you a competitive salary, permanent contract after the probation period, development package, team building events, activity-based office in Poznan’s city center in the new prestigious office building – Nowy Rynek. The building is recognized as a building without barriers, which means that it is fully adapted to the needs of people with disabilities.

Our compensation package on employment contracts includes:   

• An office-first approach: home office is available up to 2 days per week

• Adaptable Hours: start your workday anytime between 7:00 AM and 9:00 AM

• Home office subsidy

• Private Medical Care

• Multikafeteria MyBenefit

• Wellbeing program

• Extra Day Off for voluntary activities

… and while in the office you can also use modern office space with beautiful view and high standard furniture, bicycle parking facilities & showers, chill-out rooms with PlayStation, football table, pool table, board games, subsidized canteen with delicious food & fruit.

Interested?  

If you recognize yourself in this profile and challenge, we kindly invite you to apply with CV written in English.  

Who we are  

We are the world leader in stone wool solutions. Founded in 1937 in Denmark, we transform volcanic rock into safe, sustainable products that help people and communities thrive. We are a global company with more than 12,200 employees, located in 40+ countries with 51 manufacturing facilities… all focused on one common purpose – to release the natural power of stone to enrich modern living.    

Sustainability is central to our business strategy. ROCKWOOL was one of the first companies to commit to actively contributing to the United Nations Sustainable Development Goals (SDGs) framework and are actively committed to 11 SDGs, including SDG 14, Life Below Water. Through our partnership with the One Ocean Foundation and in connection with our sponsorship of the ROCKWOOL Denmark SailGP team, we will help raise awareness around ocean health challenges in an effort to accelerate solutions to protect it.