Payment and subscription billing integration with Stripe, Chargebee, and Orb.

We connect your product to the billing platform you chose, or help you choose one: checkout, subscriptions, plan changes, usage-based billing, and the webhooks that keep your database in sync with what customers actually paid.

Platforms we have integrated

Stripe

Payments, Checkout, subscription billing, and webhooks.

Chargebee

Subscription management, plans, and invoicing on top of your payment gateway.

Orb

Usage-based and hybrid pricing: metering events from your product turned into invoices.

What we build

Checkout and payments

One-off and recurring payments, saved payment methods, and the failure paths: declines, retries, and extra authentication.

Subscriptions and plan changes

Trials, upgrades, downgrades, proration, cancellations, and renewals, with access in your app following the billing state.

Usage-based billing

Metering usage inside your product and sending it to the billing platform, so invoices match what customers used.

Webhooks and reconciliation

Verified, idempotent webhook handling through a queue, so a retried or out-of-order event never charges twice or grants access by mistake.

Stack, and why

Python, Django and FastAPI

Billing logic, entitlements, and webhook endpoints.

RabbitMQ and Celery

Billing events processed in the background, with retries.

Postgres

Subscriptions and entitlements stored with a clear history of changes.

Redis

Idempotency keys, locks, and short-lived state.

Proof, not promises

Proxy serviceA proxy service, built end to endFull-cycle backend for a proxy service: payment gateway and subscription billing integrations, SDK integrations, and the service logic in between. Client name withheld at their request.

PythonPostgresPayment gatewaysSubscription billingSDKs

How a project runs

1
Call
A short call about what needs to be built or connected, and why it matters to your product.
2
Discovery sprint
We map your systems, the external APIs, and the risks, then give you a range of hours.
3
Build in short iterations
Working pieces in your environment as we go, not a big reveal at the end.
4
Launch and after
Release with monitoring, then a handover to your team or ongoing support on the Scale tier.

How we bill

Hourly or monthly. Never a fixed price per project.

Hourly or a monthly block

You pay for the hours we work, or a fixed monthly amount for a reserved block of hours. Either way, you can scale up or down between months.

Why no fixed project price

Integrations always hide surprises: an undocumented rate limit, a webhook that fires twice, data that does not match between systems. A fixed price means either padding it for every risk or cutting corners when one shows up. We estimate a range of hours instead and revise it as we learn.

Starting small

A short call, then a discovery sprint to map your systems, the third-party services, and the risks before anyone commits to an estimate.

Engagement tiers

FeatureStarterGrowthScale

Discovery sprint✓✓✓

Dedicated engineer—✓✓

Production on-call——✓

Weekly engagement—20 hrs40+ hrs

FAQ

Which billing platforms do you work with?

We have integrated Stripe, Chargebee, and Orb. If you are still choosing, we will compare them against your pricing model before any code is written.

How do you avoid double charges and missed webhooks?

Webhooks are verified, stored, and processed through a queue with idempotency checks. We also reconcile your records against the billing platform, so drift gets caught early instead of by a customer.

Do our servers handle card data?

We design it so they do not. Card details go straight to the payment provider through its hosted checkout or fields, which keeps your PCI scope small.

How do you price it?

Hourly or as a monthly block of hours. We do not quote a fixed price per project, because billing edge cases tend to surface once real payments start flowing.

Other services

Tell us what needs connecting.

We reply within one business day.