Backend API + Integrations

The plumbing that makes everything work. Custom APIs and third-party integrations, built securely and built to scale

The work nobody sees (until it breaks)

Every product, portal and platform we build depends on what happens behind the scenes. APIs that serve data to frontends. Integrations that keep systems in sync. Webhooks that trigger workflows. Payment processing, authentication, email delivery, CRM connections, data imports, scheduled jobs.

This is engineering work that users never see directly but feel immediately when it's done badly. We build backends that are fast, reliable, well-documented and maintainable. Not clever for the sake of it. Just solid infrastructure that does its job.

Custom APIs

RESTful APIs built on .NET, designed for the consumers that need them. Whether that's a mobile app, a single-page frontend, a third-party system or all three at once. Documented, versioned and built to handle the load.

Third-Party Integrations

CRM, payment providers, email platforms, accounting software, booking systems, identity providers. We connect your platform to the tools your business already uses so data flows where it needs to without manual intervention.

Data Pipelines

Moving data between systems reliably. Imports, exports, transformations, scheduled syncs. Built with proper error handling, logging and retry logic so you know exactly what's happening with your data at all times.

How we approach it

Define the contract

Before writing any code, we define what the API needs to do, who consumes it, and what the data looks like. Clear documentation from the start means fewer surprises during integration.

Build with standards

RESTful design, proper HTTP status codes, consistent naming, pagination, error handling. We follow conventions that any developer can understand because your API might need to work with teams and systems we've never met.

Secure by default

Authentication, authorisation, rate limiting, input validation. Security isn't a layer we add at the end. It's built into every endpoint from the start.

Test and document

Automated testing, integration testing, and documentation that stays up to date as the API evolves. Your API is only useful if the people consuming it know how to use it.

Key technologies

We build portal solutions on trusted tech like Umbraco, Microsoft .NET, Azure, and integrated CRM tools - ensuring your platform is secure, scalable, and ready to evolve with your business.

Learn more

Need to connect something?

Whether it's a custom API, a third-party integration or a data pipeline, tell us what you need and we'll work out the best approach.

Reach out directly:

0121 828 8500

hello@appcentric.co.uk

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