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API development & integration

Systems that talk to each other reliably.

Well-documented APIs and integrations between your products, partners and business systems.

Why teams call us

Problems this solves

  • 01

    Data re-typed between systems

    Orders, leads and invoices copied by hand between tools.

  • 02

    Fragile integrations

    Connections that fail silently and are noticed days later.

  • 03

    Partners need access

    Customers and partners want an API you do not yet have.

  • 04

    Undocumented endpoints

    Nobody knows what the existing API does or who uses it.

Our approach

We design and build APIs that are consistent, versioned, secured and documented, and integrations that retry, log and alert when something fails. Common integrations include payment gateways, CRM and ERP systems, accounting, logistics, messaging such as WhatsApp and email, and government or banking APIs.

Every integration has an owner, a log and an alert, so failures are seen and fixed rather than discovered later in the accounts.

Application Engineering

What is included

  • API design

    REST or GraphQL APIs with clear contracts and versioning.

  • Authentication

    OAuth 2.0, API keys and scoped access.

  • Webhooks

    Signed webhooks with retries and replay protection.

  • Third-party integrations

    Payments, CRM, ERP, accounting, courier and messaging.

  • Monitoring

    Logs, alerts and dashboards for every integration.

  • Documentation

    OpenAPI specifications and developer guides.

What you receive

  • API design and specification
  • Working API or integration
  • OpenAPI documentation
  • Monitoring and alerts
  • Automated tests
  • Handover and runbook

Technology we work with

  • REST
  • GraphQL
  • OpenAPI
  • OAuth 2.0
  • Webhooks
  • Laravel
  • Node.js
  • Razorpay
  • Salesforce
  • WhatsApp Business Platform

Industries

How an engagement runs

Every engagement starts with a signed agreement and an advance payment as set out in your proposal. Work begins once both are complete.

  1. 01

    Map

    Systems, data flows and owners documented.

  2. 02

    Design

    API contracts and integration patterns agreed.

  3. 03

    Build and test

    Implementation with automated and end-to-end tests.

  4. 04

    Monitor

    Go-live with logging, alerts and support.

Ready to start? Talk to us directly.

Tell us what you need in a few lines. A specialist replies with next steps and a written proposal before any work begins.

Frequently asked questions

Can't find your answer? Ask us

Can you integrate with systems that have no API?
Sometimes, through file exchange, database integration or robotic process automation. We assess the safest option.
Do you secure the APIs?
Yes: authentication, authorisation per resource, rate limiting and input validation, with an API security test available.
Who maintains the integrations?
We can, under a support plan, or your team can, using the documentation and runbooks we hand over.

Start with a conversation.

Share a few details. A specialist replies with next steps, usually starting with a short call.

VD Hosts