Kensink Labs
CQRS & Event SourcingApplication Design Patterns8-week engagement
PATTERN · CQRS + EVENT SOURCING

CQRS and event sourcing, for systems that must remember.

Separate reads from writes, and store every change as an immutable event. Powerful for audit, complex domains, and time travel, and overkill for most CRUD. We apply it surgically.

PostgreSQLMessage queueTypeScript
Cycle
8 weeks · fixed price
Stack
CQRS / ES
Output
Production code + eval suite
Handoff
Full source ownership
[THE SHORT VERSION]

An audit log as the source of truth.

Event sourcing stores every state change as an immutable event, so the current state is a projection you can rebuild, replay, and audit. CQRS pairs it by splitting read and write models. The payoff is auditability and complex-domain clarity; the cost is real complexity. We use it where regulation or domain complexity earns it, not by default.

When it fits
  • Strong audit and history requirements
  • Complex domains with rich business rules
  • Systems needing to replay or reconstruct state
When it does not
  • Standard CRUD apps, where it is overkill
[HOW WE BUILD IT]

How we build with CQRS & Event Sourcing.

01

Scope and fit

We decide where CQRS & Event Sourcing earns its place in your system, and where a simpler tool wins. No resume-driven architecture.

02

Build on a tested foundation

We integrate CQRS & Event Sourcing against a foundation we trust: typed code, CI, and observability from the first commit. Boring infrastructure, modern surface.

03

Eval before launch

An eval suite proves the build behaves before it reaches a user. We measure, then ship.

04

Handoff with ownership

Your team gets the code, the tests, and a runbook. No lock-in to us or to a vendor framework.

[WHAT YOU GET]

What the engagement leaves behind.

8 wks
Problem to production
100%
Source ownership at handoff
Eval-first
Tested before it ships
0
Framework lock-in
APPLIED K-FRAMEWORK

Bring the problem.
We’ll bring the build.

Eight weeks, fixed price, eval suite at handoff. Senior engineers, full source ownership, no framework lock-in.