System IntegrationServices
Connect the systems you already run so that data is entered once, flows where it is needed and stays consistent everywhere.
System Integration Services: what the work involves
Most companies end up with a collection of tools that each work well alone: a POS at the counter, an accounting package in finance, a CRM for sales, a website taking orders. The pain sits between them. Staff retype orders into accounts, stock figures disagree across systems, and every month someone reconciles by hand. Integration is the work of making these tools behave like one system without replacing any of them.
DevKey begins by mapping which system owns which piece of data, then chooses the lightest reliable connection for each link: a vendor API, webhooks, scheduled file exchange or, as a last resort, direct database access. We build the integration layer with queues, retries, idempotent processing and a log of every message, so failures are visible and recoverable, and a downstream outage never silently drops an order.
Core features
Data ownership mapping
For each entity, such as customer, product or invoice, we decide which system is the source of truth and which only receive copies.
Connector development
Adapters for vendor APIs, webhooks, files and databases translate between each system's format and a common internal model.
Queued, retried delivery
Messages pass through a queue with backoff and retries, so a temporary outage on either side is absorbed rather than losing data.
Idempotent processing
Each message carries an identity, so replays after a failure never create duplicate invoices or stock movements.
Monitoring and replay console
A dashboard shows message status, failures and errors, with the ability to fix the cause and replay what failed.
Reconciliation reports
Scheduled comparisons between systems highlight records that disagree, so drift is caught in days rather than at year end.
What we get right before launch
Systems without APIs
Older packages may offer nothing but a database or file export. We use these carefully, read-only where possible, and tell you plainly where support or warranty on the vendor side may be affected.
Conflicting data models
One system's customer is another's account with several contacts. Mapping these concepts deliberately, and keeping a cross-reference table of IDs, prevents slow corruption.
Who is on call when it breaks
Integrations fail at the seams between teams. We agree alerting, ownership and a runbook, and avoid silent failure by making errors visible to someone who can act.
Tools and technology
- Node.js
- TypeScript
- REST
- GraphQL
- PostgreSQL
- Redis
- Message queues
- Docker
Common questions, answered
Can you integrate software we did not build?
Yes, provided it exposes an API, webhooks, file exports or a database we may access. We review each system's options during discovery and say honestly where a link would be fragile or not supported by the vendor.
What if one of the systems goes offline?
Messages wait in a queue and are retried automatically once it returns. Nothing is lost, and the monitoring console shows what is pending, so staff know the integration is catching up rather than broken.
Is real-time sync always necessary?
No. Some links, like a new order, benefit from immediate delivery, while others, like nightly financial summaries, are better batched. Choosing the right rhythm is simpler to run and cheaper to maintain.
Will integrations survive software upgrades?
They need care, since vendors change APIs. We pin versions, write tests against the contract and monitor for failures, so an upgrade breaks a test or an alert, not your accounts at month end.
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Ready to start your System Integration Services project?
Tell us what you need and we will come back with a clear scope, timeline and the questions worth answering before any build starts.