APIs & Integrations
Systems that talk to each other, reliably.
Modern business systems are ecosystems. The hard part is rarely a single application — it is making payments, marketing platforms, marketplaces, accounting tools and communication channels behave as one coherent system, and keeping them behaving when any of them change.
We have designed, consumed and — crucially — maintained a wide range of third-party integrations in production. That maintenance experience shapes how we build: defensive, observable and resilient to the other side having a bad day.
Payments & finance
- Stripe, including subscription billing with Stripe.NET
- Card payment and consumer-finance provider integrations
- TrueLayer and open-banking flows
- Xero and Kashflow accounting integrations
Marketing, analytics & communications
- Google Ads, Google Analytics Data and Google Business Profile APIs
- Microsoft Advertising, LinkedIn conversion tracking and Meta integrations
- Brevo, SendGrid and MailChimp email platforms
- WhatsApp Business API and messaging workflows
- Microsoft Graph, Exchange and SMTP/IMAP integrations
Commerce, logistics & compliance
- eBay, Shopify and WooCommerce APIs
- Google Merchant Centre feed generation and transformation
- UPS and Parcel Pro shipping integration
- Companies House API and filing integrations
- Salesforce, HubSpot and Calendly
How we build integrations
- API-first design with clear, versioned contracts
- Retry, backoff and idempotency as standard, not afterthoughts
- Webhook handling with verification and replay protection
- Monitoring and alerting so failures surface before customers notice
Have a project in mind?
Tell us what you're trying to build — or untangle — and we'll tell you, plainly, how we'd approach it. No obligation, no hard sell.
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