Duende Identityserver Consulting Services

Helping development teams to create smooth, secure and compliant user experiences. 

Ensure Seamless Identity and Access Management

Whether you need customized authentication flows, need to overcome legacy technology, ensure compliance, or speed up the deployment of secure and streamlined authentication processes, I can help you. 

As a specialist in Duende IdentityServer, I bring expert-level insight into implementing authentication, authorization, OpenID Connect, and IdentityServer in .NET applications. With a track record of successfully training and mentoring development teams, I’m here to help your team navigate the complexities of secure identity management.

Why Work With Me?

Tailored to the needs of each developer and organization, I offer the expertise, hands-on approach, and personal attention needed to help developers and applications reach their full potential.

My Experience

  • 20+ years of experience with .NET and C# (since it began in 2002!).
  • 14+ years of global teaching and mentoring experience.
  • Co-founder of Edument, a software development and training company. 
  • I’m a Microsoft MVP in .NET (2025)
  • 1,100+ Stack Overflow answers on .NET, IdentityServer, and security topics.
  • Silver Badge holder for IdentityServer4 on Stack Overflow.
  • Co-authored a 300+ page C# eBook for learning C#.
  • Multiple Azure certifications, including AZ-204 and AZ-900.
  • Founder of .NET Skåne.
  • Regular speaker at Swedish and international conferences
  • Developed an original Azure Cloud Debugger tool for Azure developers.
  • I work with startups & enterprises. 
  • I cover advanced topics like CQRS, Event Sourcing, and OpenID Connect.

My Competencies

  • C#
  • .NET Framework, .NET
  • .NET Core and .NET
  • ASP.NET Core
  • SQL Server
  • Web Security
  • Domain-Driven Design
  • CQRS pattern
  • Event-driven architecture
  • Test-Driven Development
  • Clean architecture
  • Micro Services
  • Cloud development
  • API development
  • Build and deployment
  • OpenID-Connect & OAuth
  • .NET Authentication and authorization
Tore Nestenius presenting at the Øredev conference in Malmö, November 2024.

Have A Question? Want to get Started? Let's Talk!

Whether you’re looking for solutions, a practical hand, or some expert guidance, I’m here to help you. If you’d like to get in touch, please complete the form or reach out to me directly using the details below.

Remove Risk and Focus on What Matters

I’m engaged in the IdentityServer community. On Stack Overflow, I’ve contributed over 1,100 answers on IdentityServer, authentication, OpenID Connect, and .NET, making me the only expert outside the product’s creator to earn the silver badge for IdentityServer4! My dedication extends to training workshops and posts on my blog, where I tackle common challenges and share insights on IdentityServer and related security topics.

Secure Users and Apps

Systematically secure your solution from data theft, disruptions, and cyber attacks.

Smooth User Experiences

Ensure end-users can log in and out smoothly and securely around the world.

Meet Standards

Meet legal and industrial data protection standards such as GDPR and FAPI.

Leading Expertise

I'm the only expert outside of Duende's creators to earn a silver badge for IdentityServer4.

Range Of Services

Whether it's coaching, team workshops, or direct implementation support, I can help you.

1000s of Devs Helped

1100+ Stack Overflow answers on IdentityServer, authentication, OIDC, and .NET.

Key Training Workshops and Content for Duende IdentityServer

Duende Identityserver Coaching and Mentoring

Want to develop the in-house expertise that you need to ensure secure and smooth user login experiences? No problem! I offer coaching and mentoring for junior and senior developers that helps them to learn the intricacies of implementing IAM through Duende faster and more deeply. I can help your developers with specific challenges, offer training sessions, and inspect and provide feedback on your authorization and authentication flows while tailoring the coaching to your wider goals. 

How does it work? 

I can coach developers individually or as a team, giving an insightful space for questions and navigating challenges together. Meetings can be flexibly arranged to suit each developer’s schedule, and can be more or less structured depending on your unique goals and challenges. 

Identityserver Consulting and Development

Need an experienced pair of eyes and hands for your Identityserver deployment? Whether it’s ensuring compliance and securing user data or streamlining and improving your authorization and authentication flows, I can help you with a range of challenges, including:

  • Reviewing your protocol requirements and designing a secure and scalable architecture. 
  • Direct deployment and configuration of identityserver services on Duende. 
  • Authentication flow customization.
  • Review of IAM cyber security and IAM security hardening. 
  • Migration from legacy IAM systems and architectures. 

IAM and Duende Identityserver Workshops

I offer a range of introductory workshops to Identityserver and OpenID Connect that are designed to help developers to practically navigate the challenges of ensuring smooth and secure IAM experiences. 

My workshops are designed to be a better alternative to e-learning; by giving the right mix of resources, immersive demonstrations, and step-by-step guides, I help developers to learn faster and more deeply. 

My workshops include: 

Tore Nestenius presenting about authentication at the Copenhagen .NET User Group
Tore Nestenius - Freelance instructor and consultant

Book A Free Workshop

Experience is the key to a great workshop! Why not put me to the test? Get in touch for a free 30-45 minute workshop tailored to the topics and challenges you’re facing, delivered either in-person or remotely. 

FAQs

Where are you located?

I am located in Helsingborg, Sweden.

Do you travel?

Yes, I travel short distances, both within and outside Sweden.

Do you provide remote services?

Absolutely! Working remotely comes quite naturally to me and I’m happy to arrange a remote call to discuss working together.

Want to know more?

Don’t hesitate to contact me for more details.

Identity Challenges? IAM Here to Help!

Need to upskill your team or make some faster headway on deploying a secure, manageable, and scalable IAM solution? Struggling to find answers to your questions? I can offer practical guidance for navigating a range of IAM challenges, including: 

  • Guidance on IAM architecture as well as authentication and authorization protocols. 
  • Identifying the right IAM solution for your business. 
  • Achieving compliance with data protection standards using modern solutions. 
  • Any questions or challenges you’re facing in the world of authentication and authorization.

Feel free to get in touch using the details below, submitting a form on the contact page, or connect with me on LinkedIn.

Tore Nestenius - Freelance instructor and consultant