The document introduces the first Zürich SaaS meetup held on August 19, 2021, hosted by Roman Weis, a mechanical engineer turned software engineer, who is currently on a startup journey with Stamy Booking. The meetup covers topics such as software architecture for SaaS, including typical components, task-based commands, and event-driven architecture. Roman invites participants to engage with him and hints at future meetups while emphasizing the importance of core behavior and application state management in SaaS products.

1. Welcome to the first
Zürich SaaS Meetup
19. August 2021

2. About me
Let’s stay in touch!
https://www.linkedin.com/in/roman-weis
@rocketroman
roman.weis@stamybooking.com
SaaS: https://www.stamybooking.com
Medium: https://roman-weis.medium.com
• Mechanical engineer turned software engineer
• Worked several years in the industry
• Currently on my startup journey
• Stamy Booking – a SaaS for sports &
wellness industry

3. Why this group?

5. Topics
● Marketing strategies
● Software Engineering
● Business plans
● Pitches
● Investment strategies
● ...

6. Today’s topic: Software Architecture for your SaaS
● typical SaaS components
● task based commands & CQRS
● Event-driven architecture
● application state at your fingertips
● infrastructure example: serverless in the multi-cloud

7. Business value
IT related stuff
Software product

9. Always start with the core

10. Behavior First
Domain logic
Validations

11. CQRS
#nocode &
CMS
Greg Young
https://cqrs.files.wordpress.com/2010/11/cqrs_documents.pdf

12. Event-driven Architecture
★ single responsibility
★ low code coupling,
composable code
★ scalability
★ increased performance,
workload in the background
● distributed system:
increased complexity
● possible endless loops
● system overload
Gotchas

13. Application State Management

14. Inspired by the redux pattern
Command has a reference to the “whole
world” (lazy loaded) - the application state
Unit of Work pattern
Optimistic concurrency

15. Command: code example

16. commands domain events
data

17. Below the tip of the iceberg
Example: Stamy Booking Infrastructure

18. What’s next?
Let’s stay in touch!
https://www.linkedin.com/in/roman-weis
@rocketroman
roman.weis@stamybooking.com
SaaS: https://www.stamybooking.com
Medium: https://roman-weis.medium.com
Location for next Meetup?
Intoku in Zürich Altstetten
Up to 18 people