Do you work with Stripe Connect?

Connect marketplaces and platforms are outside this offer and quoted separately after a short written brief.

Which stacks do you work in?

Node.js and TypeScript backends, Firebase Cloud Functions and Python services are the usual ones. Ask by email if yours is different.

Can you move existing subscribers to new prices?

Not in this offer. Migrating live subscribers carries billing risk and is quoted separately, with a plan you approve first.

Is my code kept private?

Simon asks only for the access the work needs: the repository, plus read-only or test-mode access where the offer lists it. Production keys are never asked for. Your code is never shared or reused, and Simon deletes his local copy at delivery, when you can remove his access. An NDA is fine; send yours with the access.

Do I need a call before I pay?

No. The scope, price and delivery time are on this page, and everything happens in writing. If you want to talk live, calls cost $100 per 15 minutes, paid upfront.

Who owns what you deliver?

You do. The code, videos and files delivered under this offer belong to you once paid.

Fixed-price offerStripe subscription billing, set up or fixed and tested

Customers stay active after their card fails, upgrades don’t change their plan, or webhooks fail and nobody notices. Your Stripe billing is set up or repaired in your own codebase, and every flow is run in Stripe test mode before you switch anything live.

Pay $950 & start

Full refund if Simon can’t take it on once he sees your project, or if you cancel before work starts.

Check fit by email

Simon does the work himself
5.0 from 127 Fiverr reviews, checked Oct 30, 2026
Paid to App369 LLC through Stripe. Receipt by email, invoice with your company name on request.

$950 fixed price, 5 business days after repo access and a test-mode key. Live mode is never touched.

Work starts as soon as payment and the access arrive.

Price checked October 25, 2026.

No call needed. Ask a question first by email at contact@app369.com or with the contact form; we reply by email, usually within one business day.

Short answer

Stripe Billing Fix and Setup sets up or fixes Stripe subscriptions in your codebase: up to 3 plans, Checkout, a webhook handler, the customer portal and failed-payment handling, tested in Stripe test mode before you switch to live. It costs $950 and takes 5 business days from repo access and a test-mode key. It fits apps adding or repairing subscriptions.

Stripe Billing Fix and Setup

Subscriptions that don’t renew right, webhooks that fail quietly, or no way for customers to change plans. Stripe billing set up or fixed in your codebase, and every flow tested in Stripe test mode.

$950

fixed price, 5 business days

You get

Products and prices for up to 3 plans, monthly or yearly
Sign-up through Stripe Checkout or the Payment Element
A webhook handler for the subscription lifecycle (created, updated, payment failed, cancelled) with signature checks and no double-processing
The Stripe customer portal for plan changes, card updates and cancellations
Failed-payment handling: retries and emails switched on, and clear access rules for past-due accounts
Every flow run in test mode with test clocks, delivered as a pull request with notes
One revision round

Not included

Stripe Connect marketplaces (quoted separately)
Tax registration or accounting advice
Moving existing subscribers to new prices
Switching your account to live mode, which you do yourself

Delivery

5 business days after repo access and a test-mode restricted key arrive.

Test mode only: your live Stripe data is never touched.

Simon built and runs the Stripe subscriptions, webhooks and payment links behind Workspace369’s billing.

Pay $950 & start

Full refund if Simon can’t take it on once he sees your project, or if you cancel before work starts.

After you pay

Simon emails you within one business day to confirm and send the access checklist. You can also send it straight away to contact@app369.com. What the work needs:

Access to the repository
Your plans and prices, and what is broken today (if anything)
A test-mode restricted key for your Stripe account

Delivery takes 5 business days from repo and test-mode access. Live mode is never touched.

Full refund if Simon can’t take it on once he sees your project, or if you cancel before work starts.

Your code stays private: it is never shared or reused, and Simon deletes his copy at delivery. An NDA is fine; send yours with the access.

Not sure it fits? See who it fits, or email a question about this offer; we reply by email, usually within one business day.

This fits when

You are launching paid plans and want billing right the first time
Webhook events fail, arrive twice or are ignored
Customers email you to change plans or update cards
Past-due customers keep full access
Nobody on the team is sure what happens when a renewal fails

Errors this fixes

Each page explains the error from the vendor’s own docs, with what to try first.

See every error fix

How it works

Pay and share access
Repo access, your plans and prices, and a test-mode restricted key. No live keys are needed.
Map the billing flows
Sign-up, upgrade, downgrade, card update, failed renewal and cancellation, written down with what your app should do at each step.
Build or fix
Checkout, the webhook handler with signature checks and no double-processing, the customer portal and failed-payment rules.
Test and hand over
Each flow is run in test mode with test clocks, then delivered as a pull request with notes. You switch to live keys yourself.

What the billing flow map looks like

Step 2 of this offer, filled in for an example app with two monthly plans. The Stripe events come from Stripe’s subscription webhooks guide, and the duplicate-event and signature rows from its general webhooks guide (both checked October 23, 2026); what the app does in each row is this example app’s choice. The build then makes the code follow the map, and each row is run in test mode.

Flow	Stripe event	What the app does	How it is tested
Renewal paid	invoice.paid	Fetches the subscription, confirms its status is active, then extends access	A test clock moved past the renewal date
Renewal fails	invoice.payment_failed	Emails the customer a link to update their card; access follows your past-due rule	A test clock renewal with a test card that declines
Plan change	customer.subscription.updated	Sets the plan in your database from the subscription’s current price	An upgrade and a downgrade in the customer portal
Subscription ends	customer.subscription.deleted	Removes access	A cancellation in the customer portal, then the test clock moved to the end of the period
Same event delivered twice	Any	Logs each event ID and skips one it has already processed	The same event sent twice
Request not from Stripe	Any	Rejects it unless the Stripe-Signature header checks out against the endpoint secret	An unsigned request

Renewal paid
Stripe event
invoice.paid
What the app does
Fetches the subscription, confirms its status is active, then extends access
How it is tested
A test clock moved past the renewal date
Renewal fails
Stripe event
invoice.payment_failed
What the app does
Emails the customer a link to update their card; access follows your past-due rule
How it is tested
A test clock renewal with a test card that declines
Plan change
Stripe event
customer.subscription.updated
What the app does
Sets the plan in your database from the subscription’s current price
How it is tested
An upgrade and a downgrade in the customer portal
Subscription ends
Stripe event
customer.subscription.deleted
What the app does
Removes access
How it is tested
A cancellation in the customer portal, then the test clock moved to the end of the period
Same event delivered twice
Stripe event
Any
What the app does
Logs each event ID and skips one it has already processed
How it is tested
The same event sent twice
Request not from Stripe
Stripe event
Any
What the app does
Rejects it unless the Stripe-Signature header checks out against the endpoint secret
How it is tested
An unsigned request

Sample only: an example app, not a client’s billing. A real map uses your plans and prices, and your rules, such as how long a past-due customer keeps access, which you decide.

Read Stripe’s subscription webhooks guide

Built before

Work Simon has shipped that uses the same kind of build. Every project links to something you can check.

2023–nowOur own product

Workspace369

SaaS, iOS & web

An all-in-one workspace for service businesses: CRM, proposals, invoicing and payments, scheduling and a shared email, SMS and voice inbox. Designed, built and run by App369.

Flutter app on iOS and the web, live on the App Store
Firebase backend split into 20+ Cloud Functions codebases
Stripe billing, Twilio voice and SMS, inbound email security

FlutterFirebaseTypeScriptStripeTwilio

Case study App Store

Questions before you pay

Do you work with Stripe Connect?: Connect marketplaces and platforms are outside this offer and quoted separately after a short written brief.
Which stacks do you work in?: Node.js and TypeScript backends, Firebase Cloud Functions and Python services are the usual ones. Ask by email if yours is different.
Can you move existing subscribers to new prices?: Not in this offer. Migrating live subscribers carries billing risk and is quoted separately, with a plan you approve first.
Is my code kept private?: Simon asks only for the access the work needs: the repository, plus read-only or test-mode access where the offer lists it. Production keys are never asked for. Your code is never shared or reused, and Simon deletes his local copy at delivery, when you can remove his access. An NDA is fine; send yours with the access.
Do I need a call before I pay?: No. The scope, price and delivery time are on this page, and everything happens in writing. If you want to talk live, calls cost $100 per 15 minutes, paid upfront.
Who owns what you deliver?: You do. The code, videos and files delivered under this offer belong to you once paid.

Fiverr reviews / 3 hand-picked of 127

What buyers said about Simon’s development work

Read 126 of the 127 reviews

“Working with Simon makes everything run so smoothly and better than I could ask for it. Amazingly communicative, extremely knowledgeable of coding and the backend processes. I strongly recommend.”
A buyer in the United States, January 2026. App development on Fiverr
“Working with Simon has been an absolute pleasure. He’s not only incredibly skilled with his code, but he also brought so much care and attention to detail, especially when creating a custom section template for my Shopify site. He made the entire process smooth and collaborative, and consistently went above and beyond to make sure everything looked and functioned beautifully, very much the way I've envisioned. Highly recommend him for anyone looking for thoughtful, top-notch development support!”
A buyer in China, April 2025. Custom order on Fiverr
“Very responsive, attentive to fixing bugs, and completed the project as needed! Thank you!”
A buyer in the United States, July 2022. Shopify on Fiverr

Read the whole story

Sixteen five-star reviews from one buyer: mobile apps, app design and a Shopify store (Mark, United States)
A large custom app build, delivered on the back end and the front end (A buyer in the United States)

Ready to start?

Pay online and send what the work needs by replying to the Stripe receipt. Simon, who builds and runs the SaaS Workspace369, does the work himself.

Pay $950 & start

Full refund if Simon can’t take it on once he sees your project, or if you cancel before work starts.

Related fixed-price offers

Fixed scope, fixed price, paid upfront. The work happens in writing; no call needed.

Looking for something else? See all fixed-price offers

Fixed-price offerStripe subscription billing, set up or fixed and tested

Short answer

Stripe Billing Fix and Setup

You get

Not included

Delivery

After you pay

This fits when

Errors this fixes

How it works

Pay and share access

Map the billing flows

Build or fix

Test and hand over

What the billing flow map looks like

Built before

Workspace369

Questions before you pay

What buyers said about Simon’s development work

Read the whole story

Ready to start?

Further reading

Related fixed-price offers