Most applications I work on need to talk to something external — a payment provider, a CRM, an API model/tool or a custom API. Building that well means thinking about error handling, retries, rate limits, and what happens when the third-party goes down.
Common integrations
Stripe is the one I’ve done the most. I’m a Stripe Certified Architect, so payments — subscriptions, one-off charges, invoicing — is something I’m very comfortable with. Beyond that: HubSpot, Tesla Powerhub, Enphase, Sigenergy, and more. The list is long.
I also build internal APIs when teams need their own services to communicate.
What reliable integration work includes
A working API call is the easy part. The important work is making sure the integration behaves well when data is missing, a provider is slow, a webhook is retried, an access token expires, or a payment state changes outside your app.
I usually think through request validation, retries, queues, webhook verification, logging, alerts, backfills, and reconciliation. That makes the difference between an integration that works in a demo and one that keeps working in production.
Payment and subscription systems
For Stripe projects, I can help with Checkout, Billing, subscriptions, invoices, customer portals, webhook handling, and internal admin flows. The goal is to keep money-related state consistent and make support cases easier to diagnose.
Who it’s for
Teams adding a new integration to an existing application. Companies whose product relies on third-party services working reliably. If you need something connected and want it done properly, I’m happy to help.
Questions I can help answer
Can you work with an API that has poor documentation?
Usually, yes. I start by isolating the critical flows, testing the provider behavior directly, and building a small integration surface that can be debugged when something changes.
Can you build the internal API too?
Yes. If your application needs its own API for internal tools, mobile apps, partner access, or background services, I can design and build that alongside the integration work.