Identity and Access Management
Sign-in, roles and permissions for applications that have grown over the years.
- Microsoft Entra ID as identity provider
- OAuth2 and OpenID Connect on the consumer side
- Replacing grown login solutions
Software that still works years later.
I am Boris Bosnar. For over 13 years I have been building software, running it and carrying the responsibility for keeping it running. As Bosnar GmbH, with one point of contact instead of a hotline.
What I work on
Three areas, the same way of working: understand what is needed, then build something that lasts.
Software Development and Project Support
Full-stack inside your team or as a self-contained build. Systems that stay maintainable years later.
- Full-stack inside your team
- Modernising existing systems
- Custom applications
Websites and Ongoing Support
Custom-built and fully managed. No WordPress, no site builders.
- Custom Websites
- Hosting & Infrastructure
- Maintenance & Support
Selected projects
Server maintenance was documented without a common structure, and the information needed sat in four systems, each with its own interface and its own authentication method.
Read the caseA Visible Object, Data Behind It seit 2025
A Configurator That Produces Manufacturing Data, Not Just Orders
Fertigung
E-Commerce
A manufacturer sells large format cuts made to measure. What has to come out at the end is data that the printer and the router can work from without rework.
Read the caseMembership, Courses and Material seit 2026
IGuKS: Permissions for a Network of Organisations and Locations
Bildung
Berechtigungen
A platform for sign-supported language education whose hardest part is not the content but the question of who may edit which facility.
Read the caseWhat my clients say
Bosnar GmbH has looked after BilderKraft for 13 years now, and the recent work on our website was a full success as always. Loading times are excellent, and the design is both visually appealing and precisely matched to what we do.
Mr Bosnar is always easy to reach and has the right answer for everything we bring to him. We are glad to have such a reliable partner at our side!
Great to work with, and a clear recommendation!
Who is behind it
I started with vocational training as a systems IT specialist at Berlin's public transport operator, followed by a computer science degree at HTW Berlin and positions at Mercedes-Benz Tech, MMS Technology and PREA Group, the last of these as software engineering manager.
Today I run Bosnar GmbH, hold a stake in a platform for sign-supported communication and work as an authorised INQA coach. Some systems have been in my care for more than a decade.