Senior Full-Stack Developer (Optimizely)

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! 

Join Us as a Senior Full-Stack Developer (Optimizely)

We’re building something exciting—a new e-commerce and marketing platform based on composable, headless, cloud architecture. Our goal? To create a seamless, tailored end-to-end customer experience. As a Senior Full-Stack Developer with Optimizely, you’ll be part of a collaborative web development team based mainly in Poznań, known for its strong cooperation and good humor.

This is the role you’ll be:

• Developing robust, scalable technical solutions.
• Implementing and maintaining automated build and deployment pipelines.
• Developing features across the stack—from data access and business logic to UI.
• Writing unit tests, fixing bugs, and documenting when needed to support sprint goals.
• Troubleshooting and resolving production issues.
• Collaborating closely with business stakeholders. 

Stack Overview:
 

• Backend: .NET 8+, Episerver/Optimizely CMS, Microservices, Apache Kafka, SQL Server.
• Frontend: NextJS, Webpack, React, TailwindCSS.
• DevOps: Azure Devops, Github Actions, Docker.
• Tools: Storybook, Chromatic.
• Development Tools: Rider, Visual Studio.
• Source Control: Git, Github, Gitflow.

What You Bring:

• 4+ years of hands-on experience in Microsoft .NET/ASP.NET Core and SQL Server.
• Solid grasp of software design patterns and architectural principles.
• Proven experience in full-stack development with C# and web technologies.
• Strong understanding of performance, quality, and security in web applications.
• Familiarity with Agile practices like CI/CD, TDD, and code reviews.
• Experience with React is a plus.
• English proficiency at B2 level or higher (spoken and written).
• Excellent communication skills and a collaborative mindset.
• A proactive, can-do attitude and openness to new ideas.
• Passion for GenAI and its potential to enhance and automate the software development lifecycle.
• Self-motivation and a drive for technical excellence.

 Preferred Skills:

• Serverless/microservices architectures (Docker)
• RESTful APIs on .NET
• Headless CMS Optimizely setups – Optimizely DXP
• Azure cloud
• Algolia Search (as a bonus)
• React (as a Bonus)

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.  

Diverse and Inclusive Culture   

We want all our people to feel valued, respected, included and heard.  We employ 79 different nationalities worldwide and are committed to providing equal opportunities to all employees, promote diversity, and work against all forms of discrimination among ROCKWOOL employees.   

At ROCKWOOL, you will experience a friendly team environment. Our culture is very important to us.  In fact, we refer to our culture as “The ROCKWOOL Way”.  This is the foundation in which we operate and is based upon our values of ambition, responsibility, integrity and efficiency.