Integration engineering

API & Systems Integration

Every manual re-entry of data between two systems is a recurring cost and a recurring source of errors. Integration is usually the cheapest software project available to a business, and the one most often postponed.

Laravel Node.js Python REST GraphQL OpenAPI RabbitMQ Kafka

The typical mid-sized company runs a CRM, an accounting package, an ERP or inventory system, a website, a support desk and several spreadsheets holding it together. The gaps between them are filled by people copying data, and every copy is a chance to introduce an error nobody notices until month end.

We build the connections — properly, with retries, idempotency, reconciliation and alerting, so that a failed sync raises a flag instead of silently dropping a record. We also build the APIs that let your own product be integrated by your customers and partners.

Capabilities

What API & Systems Integration covers

Make the systems you already pay for talk to each other.

REST & GraphQL API development

Versioned, documented, authenticated APIs for your product, with rate limiting, pagination and error semantics that client developers can rely on.

ERP & CRM integration

SAP, Odoo, Zoho, Salesforce, HubSpot, Tally, QuickBooks and Dynamics connected to your web platforms and operational systems.

Middleware & orchestration

An integration layer that centralises mapping, transformation and retry logic instead of scattering point-to-point scripts across servers.

Third-party service integration

Payments, shipping and courier APIs, SMS and WhatsApp Business, e-signature, KYC, tax and government portals.

Legacy system bridges

Wrapping old systems that have no API in a modern interface using database access, file exchange or screen-level automation where nothing else exists.

Webhooks & event pipelines

Event-driven synchronisation with guaranteed delivery, dead-letter handling and replay for when a downstream system was offline.

Why it works

What you get that you might not expect.

These are the commitments clients tell us mattered most once the project was underway.

Failures are visible

Every integration ships with retry logic, a dead-letter queue and alerting — no more discovering a two-week gap in synced orders.

Reconciliation built in

Scheduled comparison between systems that proves the data matches, rather than assuming it does.

Documented for your team

OpenAPI specifications, sandbox credentials and worked examples so your own developers and partners can self-serve.

Fast payback

Integration projects are typically small, and the saved hours and avoided errors usually repay the build within months.

How we deliver

Our integrations process

Every stage produces something you can look at, use or disagree with. Nothing is invisible until the end.

  1. 1

    Systems & data mapping

    Every system, the records that must move, the direction, the frequency and which system is authoritative for each field.

  2. 2

    Contract design

    API contracts or mapping specifications agreed in writing before build, including error and conflict behaviour.

  3. 3

    Build & test

    Development against sandboxes, with automated contract tests and simulated failure conditions.

  4. 4

    Controlled rollout

    Parallel running with manual process retained until reconciliation reports come back clean.

  5. 5

    Monitor

    Dashboards for sync health and alerting on failure rates, latency and reconciliation gaps.

Technologies we use for this

Chosen per project rather than by house policy. We will explain the trade-off in plain terms before anything is decided.

Laravel Node.js Python REST GraphQL OpenAPI RabbitMQ Kafka Redis n8n

Questions

API & Systems Integration — your questions

Not covered here?

Ask us directly

Usually yes. Options in order of preference are a supported API, direct read-only database access, scheduled file exchange, or automated interaction with the interface itself. We assess which is safe and durable for your case.

We agree a system of record per field during mapping, then apply deterministic rules — last-write-wins, source priority, or routing to a human review queue for the fields where getting it wrong is expensive.

A single well-documented two-system integration is commonly USD 4,000 to 12,000. A middleware layer connecting several systems with reconciliation typically runs USD 15,000 to 40,000.

Yes — including authentication, rate limiting, versioning strategy, developer documentation, sandbox keys and the deprecation policy that keeps partners from being surprised.

Either party. Third-party APIs change, so most clients keep a small monthly agreement covering monitoring and adaptation to upstream changes.

Thinking about api & systems integration?

Tell us the problem. You will get a rough cost, a rough timeline and an honest view on whether it is worth building — before anyone talks about a contract.