CRM Synchronization Middleware
Custom middleware that keeps two CRMs and a data warehouse in perfect sync — without duplicate records or lost updates.
−96%
Duplicate records
< 2s
Sync latency
10k+/mo
Records synced
0
Data disputes
The problem
Two teams, two CRMs, one truth — and it didn't exist. Duplicates, overwritten fields, and reps arguing about whose data was right.
What I built
A middleware layer with a canonical schema, field-level conflict resolution (last-write-wins with pinned fields), idempotency keys and a full replay log. Anything that fails is retried and visible — nothing silently disappears.
Architecture
4 stages- 1
Canonical contact/deal schema + field mapping registry
- 2
Bi-directional webhooks with idempotency keys
- 3
Conflict resolver (pinned fields + timestamps)
- 4
Replay log + admin console for failed events
Stack
Got a process like this eating your team's week? Let's kill it.