API Development & Integrations

REST and GraphQL API development

We design and build APIs that are a pleasure to consume: consistent naming, predictable behaviour, clear error responses and sensible pagination and filtering. We use REST where simplicity and caching matter, and GraphQL where clients need flexible, efficient access to related data, choosing the right approach for your use case rather than by fashion.

Good API design pays off for years, because every client and integration built on it inherits that quality. We model the domain carefully, version from the start, and document as we go, so the API stays stable and extensible as your product grows.

• RESTful API design & build
• GraphQL schemas & resolvers
• Consistent data modelling
• Pagination, filtering & sorting
• Versioning strategy
• Developer-friendly error handling

Related: Web app development

Third-party and SaaS integrations

Most businesses depend on tools they did not build: payment providers, CRMs, ERPs, email, maps, logistics and more. We integrate these cleanly so they work as part of your system, handling the quirks of each provider's API, the authentication, the webhooks and the edge cases that break naive integrations.

We build integrations to be resilient. External services go down, change their APIs and rate-limit you, so we design for retries, graceful degradation and clear alerting, meaning a wobble at a provider does not become an outage for you.

• Payment gateway integration
• CRM & ERP connectors
• Email, SMS & notification services
• Maps, logistics & data providers
• OAuth & third-party authentication
• Resilient retry & error handling

Related: Workflow automationEnterprise software development

Middleware and data synchronisation

When several systems need to share data, point-to-point connections quickly become a tangle. We build middleware that sits in the middle and orchestrates the flow: transforming data between formats, keeping records in sync, and giving you one place to manage and monitor how everything connects.

This turns a fragile mesh of ad hoc scripts into a maintainable integration layer. Adding a new system becomes a matter of connecting it to the middleware rather than wiring it to everything else, which keeps future changes cheap.

• Integration middleware
• Real-time & batch data sync
• Data transformation & mapping
• Event-driven architecture
• Central integration monitoring
• Scalable, maintainable connections

Related: Application modernisation

Webhooks, events and real-time data

Polling an API every few minutes is wasteful and slow. We build event-driven integrations using webhooks and message streams so your systems react the moment something happens: an order is placed, a payment clears, a record changes. That makes your software feel instant and keeps data fresh.

We handle the hard parts of event systems, delivery guarantees, ordering, idempotency and dead-letter handling, so events are processed exactly once and nothing is silently lost when a system is briefly unavailable.

• Webhook design & delivery
• Event streams & message queues
• Real-time data propagation
• Idempotent event processing
• Delivery guarantees & retries
• Dead-letter & replay handling

API security, performance and monitoring

An API is a door into your systems, so it has to be secured properly. We implement authentication and authorisation, rate limiting and input validation, and follow secure defaults so the API is safe to expose to partners or the public. We also tune performance with caching and efficient queries so it stays fast under load.

Once live, we monitor the API's health, latency and error rates, with alerting so problems surface before your users or partners notice. An API you cannot see into is an outage waiting to happen.

• Authentication & authorisation
• Rate limiting & throttling
• Input validation & secure defaults
• Caching & performance tuning
• Health, latency & error monitoring
• Alerting & incident visibility

Related: Cloud services (AWS / Azure / GCP)Software maintenance & support

Who API and integration work is for

We build APIs and integrations for product teams whose software needs a solid API layer, for businesses drowning in manual data entry between disconnected tools, and for companies that want to offer an API to their own partners or customers. If your systems do not talk to each other, or talk badly, this is the fix.

We work across sectors and happily integrate with whatever you already run. The common thread is the need for data to move reliably between systems, which is exactly what good API and integration work delivers.

• Product teams needing an API layer
• Businesses with disconnected tools
• Companies offering a public or partner API
• Operations plagued by manual rekeying
• Teams consolidating a tangle of scripts
• Anyone integrating a new SaaS tool

Related: Web app developmentWorkflow automation