I design and build business applications on the Microsoft platform.

Freelance solution architect

Vít Lachner — Freelance solution architect

I am a freelance solution architect and consultant. For fifteen years I have worked on CRM, Dynamics 365 and Power Platform — from pre-sales analysis through architecture and development to long-term support. Between 2017 and 2025, at Seyfor — formerly Solitea CDL — I led a development and consulting team that grew from two people to eight. Since 2025 I work independently, delivering part of my projects through ACTUM Digital.

years of practice
15years of practice
growth of the team I led
2→8growth of the team I led
years, longest engagement
14years, longest engagement

What I am working on

  • AI agents in Copilot Studio

    Not chatbots answering questions, but agents that handle incoming mail and open a case in CRM.

  • Architecture on Dynamics 365 and Power Platform

    Including ERP integrations and guardrails for citizen development.

  • Applications beyond the standard

    Power Platform and Next.js where the out-of-the-box tooling is not enough.

  • Long-term sustainability

    Several solutions I have supported and developed for over ten years.

My longest engagement has been running since 2012. It has been through two platform generations and a cloud migration, and it is still being developed — I consider that a better reference than any list of certifications.

Projects I have worked on

Looking for someone to architect a solution?

Reach out by e-mail or on LinkedIn. I am most useful on work that needs an architecture designed, not just a specification implemented.