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Read moreAPIs & Integrations
Systems that talk to each other — reliably, with proper error handling.
We build and wire third-party API integrations, custom REST and GraphQL APIs, webhook handlers, and the middleware that connects your web platform to external services.
Available worldwide — fully remote, timezone-flexible.
What is apis & integrations?
API and integration development connects separate software systems so data flows between them reliably — a website that triggers a CRM update on form submission, an ecommerce store that syncs inventory with a warehouse system, or a client portal that pulls live data from an ERP. Cortexley builds these integrations as part of larger web projects and as standalone integration work, covering REST, GraphQL, webhook pipelines, and OAuth flows.
What's included
- Third-party API integration (CRM, ERP, payments, logistics)
- Custom REST and GraphQL API development
- Webhook ingestion and event pipeline architecture
- OAuth and API authentication flows
- Middleware and integration layers for legacy systems
- Error handling, retry logic, and monitoring
FAQ
Common questions
CRM integrations (HubSpot, Salesforce, Pipedrive), payment gateways (Stripe, PayPal, Adyen), shipping and logistics APIs (DHL, FedEx, ShipStation), ERP and inventory systems, marketing platforms (Klaviyo, Mailchimp), and custom internal APIs. If it has a documented API, we can integrate it.
From the blog
Writing on custom web development
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