As time goes by... (technical challenges of bi-temporal Event Sourcing)

When building an Event Sourcing system, can we change the past? Can we also forecast “events” in the future?

If we want to provide various projections/visions of things that happened over the time, what are the consequences and trade-offs on our code?

All these questions will be answered during this talk. But moreover, I'll tell you our learning story about Bi-temporal Event Sourcing. Yet another illustration of the power of modelling, sketches and concrete examples when we need to understand each other.

Speaker: Thomas PIERRAIN

Organizer of the DDD FR (France) meetup since more than 3 years now, Thomas is an eXtreme Programmer & technical architect obsessed by use cases (vs. solution-driven approaches). He likes using DDD, TDD and Process Comm to boost his efficiency at work. Enthusiast promoter of Hexagonal Architecture for years, Thomas has also written and done lots of live-coding on the subject, especially once on stage with Alistair Cockburn.

After working 12 years in market finance (over 20 years of experience), Thomas created the 42 skillz company with his friend & associate Bruno Boucard and continued to discover various domains such as Online gaming, Transport, Finance, Hospital care. For the past few months, Thomas has enjoyed discovering the Hospitality industry with one of his recent clients.