Build & Modernize
Systems Integration
Data stops being re-keyed between systems by someone with a spreadsheet.
What this engagement is
Integration work is mostly about what happens when things go wrong: partial failures, duplicate messages, a vendor API that returns 200 with an error in the body. A naive integration works in the demo and corrupts data in production. We design for the failure cases first, because that's where the actual engineering is.
We map every field, transformation, and failure mode across the systems involved and get both sides' teams to sign off on the contracts before anything is built. The middleware layer we deliver processes messages idempotently (the same message twice has the same effect as once), keeps a replayable log of everything it has seen, and raises alerts your operations team can act on without calling a developer.
Before the manual process is retired, the integration runs in shadow mode alongside it, and we reconcile the results daily until they match. After cutover you get reconciliation reports that surface mismatches as they happen — not three weeks later, when a customer calls.
Who this is for
- Companies where staff manually move data between two systems daily
- Teams that need a new SaaS tool talking to a system from 2004
- Operations groups discovering data mismatches after the fact
What you get
- Integration services with documented API contracts
- Idempotent processing and a replayable message log
- Error handling, retries, and dead-letter handling
- Reconciliation reporting and alerting
- Deployment pipeline and operational documentation
Scope
Exactly what the quoted price covers
The scope document for this engagement lists both columns below in writing. Nothing moves between them without a conversation.
Included in the engagement
- Field-by-field contract mapping for every connected system
- Middleware services with idempotent, replayable message processing
- Failure handling: retries, dead-letter queues, and alert routing
- Shadow-run period with daily reconciliation against the manual process
- Operational runbook: how to replay, pause, and monitor each flow
Not included
- Changes inside the connected systems themselves
- Vendor license or subscription costs for integration platforms
- Historical data backfills beyond the agreed initial load
Working together
What we need from you
Fixed dates only hold when both sides show up. These are the commitments we ask for in exchange for ours.
- 01
API documentation and sandbox access for every system being connected
- 02
A contact at each system vendor who can answer behavioral questions
- 03
Someone from operations to walk us through the current manual process
Process
How it runs
- 01
Contract mapping
Every field, transformation, and failure mode across both systems documented and agreed before build.
- 02
Build and verify
Services built against the contracts with automated tests covering the failure paths, not just the happy path.
- 03
Shadow run
Integration runs alongside the manual process and results are compared until they match.
- 04
Cutover
Manual process retired, alerting handed to your team, documentation delivered.
Scope a systems integration engagement.
Send us the situation in a few sentences. You'll get a scope, a price, and a date back — or an honest no.