Event Sourcing in a Functional World

F# has become Flare's tool of choice for a few areas inside their operation. As this adoption trend continues, they're keen to share their experience with us.

At this meetup:

1. The Journey So Far: F# benefits and challenges, by Mark Schaschke (VP of Tech Ops)
2. Event Sourcing In A Functional World, by Vitaly Brusentsev (Functioneer in residence)

In more detail:

1. when a company "flipped" and went more functional by Mark Schaschke from Flare

• Benefits for the business
• Adoption
• Recruitment and on-boarding

2. Event Sourcing in the Functional World by Vitaly Brusentsev from Flare

• A practical journey of using F# and event sourcing in modern microservices
• Domain Design: Event Storming
• Events, Aggregates and DTOs
• Domain Logic as Pure Functions
• Error Handling: Railway-Oriented Programming
• Cosmos DB: Event Store and Change Feed
• Strong(-er) Consistency at Scale
• Eventually Consistent Read Models
• Dependency Rejection