Avaron AB - Logo

Senior .NET Architect with Focus on Security and Integration

Avaron AB

Stockholms län, Stockholm

Previous experience is desired

5 days left
to apply for the job

About the Company

At Avaron, you get the security of a permanent position combined with the variety of working on-site at different clients. We recruit specialists in everything from technology, IT, and industry to project management and business support – and regardless of the assignment, you have a consulting manager who is there for you and your development.

About the Role

You will step into a socially important operation where stable systems, secure integrations, and high availability make a real difference. In this role, you combine modern .NET development with architectural responsibility in a central system support that needs to function every day. You work closely with an agile Scrum team and contribute to new development, further development, operations, and technical decisions in a complex environment with many integrations.

You move between long-term architectural decisions and practical development work, with a clear focus on quality, security, and sustainable solutions. The role also involves rotating support responsibility for the team's applications, so you need to thrive in an environment where you both improve, maintain, and solve problems close to the core of the business. This is an exciting opportunity for you who want to influence both technical choices and implementation in a system with high demands for robustness.

Responsibilities
  • You drive the development of technical solutions based on .NET and .NET Core.
  • You contribute to architecture, design, and technical decisions in a business-critical system.
  • You develop, further develop, and secure REST APIs, including integrations handled in the Mulesoft platform according to the platform's standards.
  • You work with automated tests and strengthen the quality of the delivery through testability and continuous improvement.
  • You develop solutions in Blazor WebAssembly and work with integrations against Active MQ.
  • You handle database development and integrations related to SQL Server and Oracle.
  • You work with continuous integration in OpenShift and ArgoCD.
  • You share the team's responsibility for operations, troubleshooting, and support according to a rolling schedule.
Requirements
  • At least 5 years of documented work experience leading the development of technical solutions based on .NET and .NET Core.
  • At least 5 years of documented work experience as a software architect or system architect in agile Scrum teams.
  • At least 5 years of documented work experience with technical frameworks, standards, modeling, and agile development methods.
  • At least 3 years of work experience with the implementation of automated tests.
  • At least 5 years of work experience with design, development, and security within REST API, including experience developing APIs that are handled and integrated in the Mulesoft platform according to the platform's standards.
  • At least 3 years of documented work experience with Blazor WebAssembly.
  • At least 5 years of documented work experience with application development against Active MQ.
  • At least 5 years of work experience with SQL Server and Oracle.
  • At least 3 years of documented work experience with continuous integration using OpenShift and ArgoCD.
  • Fluent in Swedish, both spoken and written.
Preferred Qualifications
  • Experience with Kibana, Git, Jira, Confluence, Jenkins, JMS Toolbox, Bitbucket, Figma, and Kubeseal.
  • Experience with MVC, Serilog, REST/SOAP, Hangfire, Minimal APIs, JWT, MediatR, EF Core, and React.js.
  • Experience with the test frameworks xUnit and bUnit as well as automated Postman tests with Newman.
  • Experience with the unemployment insurance that came in autumn 2025 and its content.
We Offer
  • Permanent employment at Avaron AB
  • Occupational pension
  • Wellness allowance of 5,000 SEK per year
Application

We are hiring continuously – please apply as soon as possible.

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