Senior .NET Developer (Azure)

B3 Consulting's vision is to create a world of technology in which people come first. We come from Sweden, and our mission is to take care of how we live and work.

Our "Care" philosophy results in technology meeting care, which allows us to build long-term relationships while creating innovative solutions.

At B3, we build technology that works — scalable, reliable, and designed to last.

Now we’re looking for a Senior .NET Developer who wants to go beyond writing code and actively shape cloud-based backend systems used in a global environment.

This is a long-term opportunity to join a US-based engineering team, working on core applications and continuously improving testing and quality standards.

If you enjoy designing solid backend services and care about automation, reliability, and clean architecture — this role is for you. 

🎇Your impact:

• Design and develop high-performance backend services using C# and .NET.

• Build and evolve cloud-native solutions in Azure, working with services such as App Services, AKS, Service Bus and CosmosDB.

• Improve and extend automated testing frameworks to increase reliability and stability.

• Implement and maintain test automation scripts.

• Collaborate closely with frontend engineers to ensure seamless integration.

• Participate in architecture discussions, code reviews and sprint ceremonies.

• Contribute to continuous improvement of engineering standards and practices.

This is not a “ticket-only” role — you will have influence on architecture and quality.

🎇 What we're looking for:

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

• Hands-on experience with Azure cloud services and CosmosDB.

• Experience working with TypeScript or JavaScript.

• Strong understanding of scalable backend design and clean architecture.

• Experience in automated testing and quality-focused development.

• Degree in Computer Science or related field.

• Ability to work aligned with US time zones.

• Fluent English communication skills.

• Polish - min B2.

• You need to live in Poland and/or be eligible to work here.

🎇 Nice to have:

• Experience with Git and modern version control workflows.

• Familiarity with Playwright, Selenium or other test automation tools.

• Experience working in Agile environments.

• Background in Electrical Engineering or related technical domains.

• Interest in hardware, system simulation, or mixed-signal concepts.

• Experience in QA methodologies.

• Familiarity with Drupal.

🎇What you get with B3:

• Scandinavian-inspired work culture built on trust and ownership.

• Real impact on scalable, cloud-based systems.

• Stable, long-term cooperation.

• Health and sports benefits tailored to your needs.

• Development opportunities aligned with your technical growth.

• Work in a mature, low-ego environment focused on solutions.