APIs That Other Developers Actually Like Using
A well-designed API saves time for everyone who works with it. A poorly designed one creates endless confusion and support tickets. I've been on both sides of that, and I build with the consumer of the API in mind, not just the requirements doc.
Building New APIs
Whether you need a REST API, a GraphQL endpoint, or both, I design for clarity and consistency. Resources are named sensibly, error responses are informative, authentication is straightforward, and versioning is handled from the start so you're not painted into a corner later.
Third-Party Integrations
Stripe, Razorpay, Twilio, SendGrid, Shopify, HubSpot, Salesforce, QuickBooks — I've integrated most of the major platforms and know where the undocumented edge cases are. I handle the integration once and properly, rather than leaving it for you to debug later.
Connecting Existing Systems
Sometimes the challenge isn't building something new — it's getting two existing systems to talk to each other. I do this regularly: syncing data between a CRM and a custom platform, forwarding events via webhooks, building middleware that translates between different data formats.
Documentation
Every API I build gets proper documentation. I use OpenAPI/Swagger for REST and write clear examples for every endpoint. Your developers won't be guessing how things work.