Development Services API Integrations
Development Services API Integrations
Your tools should talk to each other — automatically, reliably, and without manual data entry bridging the gaps. We build the integration layer that connects your platforms, syncs your data, and keeps your business logic consistent across every system you rely on.
What This Service Covers Custom API integrations built for reliability — not just connectivity
Connecting two platforms is the easy part. Building an integration that handles authentication token refresh, API rate limits, partial failure recovery, webhook signature verification, and schema changes without breaking your production environment — that’s the work. We architect and build integrations that hold up in the real world, with monitoring, alerting, and documentation included as standard.
REST API & GraphQL Integration
We consume and build REST APIs and GraphQL endpoints — authentication (API keys, OAuth 2.0, JWT), request/response transformation, pagination handling, and data normalisation. Whether you’re pulling data from a third-party service or exposing your own data to external consumers, we architect the integration layer cleanly.
Every integration is typed, documented, and built with schema versioning in mind — so a third-party API update doesn’t silently break your data pipeline at 2am.
Webhook Architecture & Event Processing
Webhooks are only reliable when they’re built correctly — signature verification, idempotency keys, retry logic, dead letter queues, and event ordering all need to be handled deliberately. We build webhook consumers and emitters that process events reliably under load and fail gracefully when they don’t.
Event-driven integrations we build regularly include payment provider webhooks (Stripe, Mollie), e-commerce order fulfilment triggers, CRM activity sync, and booking system confirmations.
Two-Way Data Sync & Transformation
Most business integrations require data to flow in both directions — orders created in WooCommerce need to appear in your ERP, customer records updated in your CRM need to reflect on your platform, inventory changes in your warehouse system need to update your product catalogue. We build the sync logic, conflict resolution rules, and transformation layer that makes bidirectional data flow work correctly.
Sync jobs are monitored and logged — when something goes wrong, you have a clear audit trail showing exactly what data was processed and what failed.
Authentication, Security & Credential Management
API security is routinely underbuilt in integration projects. We implement OAuth 2.0 flows correctly — including token refresh, scope management, and revocation — store credentials in environment variables or secrets managers rather than codebases, validate webhook signatures on every inbound request, and enforce rate limiting on outbound calls to avoid third-party account suspension.
Every integration we build passes a security review before it touches production data.
Our Approach Integration architecture before integration code
The most common reason API integrations fail in production isn’t a coding error — it’s a missing architectural decision. What happens when the third-party API is down? What happens when a webhook arrives twice? What happens when the API returns a schema you didn’t expect? We answer these questions in a written integration specification before writing a single line of integration code.
That specification becomes the contract for development, the basis for testing, and the reference document your team uses when something needs to change six months after launch. Integration work without documentation is a liability, not an asset.
Platforms We Integrate With Common third-party services we connect regularly
Integration types we build regularly
From payment processing to full ERP sync — common integration scopes we’ve delivered for clients.
Payment Gateway Integrations
Stripe, PayPal, Mollie, Klarna — full integration including checkout flows, webhook handling, refunds, subscription billing, and payment method management.
CRM & Marketing Automation
HubSpot, Salesforce, Mailchimp, ActiveCampaign — contact sync, deal creation, form-to-CRM pipelines, segmentation triggers, and automated email sequence enrolment.
ERP & Inventory Sync
Bidirectional stock, order, and customer data sync between your eCommerce platform and ERP or inventory management system — with conflict resolution and audit logging.
Booking & Rental Systems
Availability sync, reservation creation, pricing feeds, and confirmation flows connecting external booking engines to your WordPress or web application frontend.
Custom REST & GraphQL APIs
Design and build of custom API endpoints exposing your platform data to mobile apps, third-party partners, or internal tools — with authentication, versioning, and API documentation.
Notification & Messaging
Transactional email (SendGrid, Postmark), SMS (Twilio), push notifications, and in-app messaging — triggered by platform events and delivered reliably at scale.
WordPress, headless & custom platform integrations
- Fault Tolerance — Custom middleware integration modules built with robust dead-letter queues
- Signature Audits — Mandatory structural authorization testing mapping inbound webhook vectors cleanly
- Bidirectional Integrity — Sync loops engineered explicitly with clear conflict-resolution models
- Contract Scoping — Comprehensive architectural contract reviews reducing production-drift risk parameters
Frequently asked questions
Common questions about API integration projects.
A single, well-documented third-party integration — payment gateway, CRM sync, or webhook pipeline — typically takes 1–3 weeks depending on the complexity of the data model and the quality of the third-party API documentation. Multi-system integrations with bidirectional sync and custom transformation logic take longer and are scoped after a discovery session.
It’s more common than it should be. We’ve worked with APIs ranging from excellently documented (Stripe) to almost entirely undocumented legacy systems. In these cases, we dedicate time to API exploration and contract discovery before committing to a full development scope — so timeline estimates reflect the actual state of the API, not an optimistic assumption.
Every integration we build includes error handling, retry logic with exponential backoff, and alerting for persistent failures. Failed events are logged with full request and response payloads so they can be diagnosed and replayed. We also provide a monitoring dashboard or integration with your existing observability stack where applicable.
Sometimes, yes — depending on what the legacy system exposes. Options include database-level integration (reading or writing directly to the system’s database), file-based exchange (CSV/XML imports and exports on a schedule), screen scraping as a last resort, or building a thin API wrapper around the legacy system. We assess the options and recommend the most maintainable approach for your specific situation.
Yes. We design and build custom REST and GraphQL APIs — typically to expose WordPress, WooCommerce, or web application data to mobile apps, external partners, or internal tooling. Custom APIs are documented with OpenAPI specs and include authentication, rate limiting, and versioning from the start.
Yes — always. Every integration we deliver includes a technical specification document covering the data flow, authentication mechanism, error handling behaviour, environment variables required, and instructions for testing and redeploying the integration. Documentation is a deliverable, not an optional extra.
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