Skip to content
radicalsoft

API & Integration Engineering

Systems that connect reliably and are easy for others to build on.

Most business friction sits between systems. We design clean APIs and build integrations that cope with retries, outages and changing data, then document and monitor them so they stay healthy.

What we build

What this service covers, in detail.

Well-designed APIs, third-party integrations, webhooks, MCP servers and developer portals.

  1. 01

    REST APIs

    Resource-oriented, versioned APIs with consistent errors, pagination and idempotency.

  2. 02

    API gateways

    Authentication, rate limiting, routing and observability at a single, well-governed entry point.

  3. 03

    Third-party integrations

    Connectors for CRMs, ERPs, payment, shipping and marketing tools built to survive vendor changes.

  4. 04

    Webhooks

    Signed delivery with retries, replay and a console so customers can debug their side.

  5. 05

    OAuth integrations

    Secure authorization flows with token storage, refresh and revocation handled properly.

  6. 06

    Background processing

    Queues and workers for long-running jobs with back-pressure and dead-letter handling.

  7. 07

    Data synchronisation

    Incremental, conflict-aware sync with reconciliation to prove records match.

  8. 08

    Developer portals

    Interactive documentation, API keys, sandboxes and sample clients.

  9. 09

    MCP servers

    Model Context Protocol servers that expose your systems to AI agents safely, with scoped permissions.

  10. 10

    AI service integrations

    Wrap model providers behind internal APIs with caching, quotas and observability.

  11. 11

    Usage metering and monitoring

    Per-customer analytics on requests, errors and latency that feed billing and support.

Example use cases

Where teams put this to work.

  • 01

    Public or partner API

    Turn internal capabilities into a stable product with documentation and keys.

  • 02

    ERP to storefront sync

    Keep stock, prices and orders aligned between the commerce site and back office.

  • 03

    Expose systems to AI agents

    Publish an MCP server so assistants can perform approved actions.

  • 04

    Legacy connectivity

    Place modern APIs in front of systems that only offer files or databases.

Technical approach

Tools we typically use here.

A starting point, not a mandate. We adapt to your existing stack and constraints.

How we choose technology
  • TypeScript
  • Node.js
  • Python
  • FastAPI
  • OpenAPI
  • GraphQL
  • Redis / queues
  • PostgreSQL
  • OAuth 2.0
  • MCP

How it works

The engagement, step by step.

  1. 1

    Map flows and ownership

    Which system owns which record, and what happens when they disagree.

  2. 2

    Design the contract

    Endpoints, payloads and error behaviour agreed and documented before code.

  3. 3

    Build resilient workers

    Idempotency, retries and back-pressure so bad hours never corrupt data.

  4. 4

    Reconcile and verify

    Automated comparison against source systems.

  5. 5

    Monitor and own

    Alerts, runbooks and a named owner per integration.

FAQ

Frequently asked questions

REST or GraphQL?

REST suits most partner APIs for simplicity. GraphQL helps when many clients need flexible reads. We recommend per case.

What if a third-party API goes down?

Requests queue and retry with back-off, alerts fire at thresholds, and data is delayed rather than lost.

What is an MCP server?

A standard way to expose tools and data to AI applications. We build them with scoped permissions and audit logs.

Planning a API & Integration Engineering project?

Tell us the problem you are solving. We will reply with questions, options and a realistic next step.