Access follows the subscription clock.
Make membership changes understandable in the product.
Where this work fits
Opening checkout does not mean a customer has paid. Confirmation arrives separately, and a subscription can later renew, fail, expire, or be cancelled. Each change needs to leave the account with the right access.
I connected membership state with access to protected product features and worked on lifecycle maintenance. The backend needed to enforce what an account could use as trials and paid periods changed.
Make a confirmed purchase useful
demo-checkout-01Almost there.
A confirmed payment and matching record are required.
Different purchase channels, consistent access.
A card-payment event and an in-app purchase receipt arrive differently and require their own checks. I used signature and receipt verification before updating account access, then handled the subscription states beyond the initial purchase.
The skills behind the work
- NestJS
- Organize backend endpoints, validation, and services around product responsibilities.
- Access control
- Check which actions and resources an authenticated account is allowed to use.
- Scheduled jobs
- Run time-based work without waiting for a person to open the application.
The billing work supported subscription growth and improved transaction success. Customers could move from a verified purchase into the membership features, with access tied to the subscription lifecycle.
- Subscriptions in 3 months
- +50%Growth after launching billing with free trials and webhook automation.