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You will get reliable Stripe webhook and billing automation for your SaaS
Top Rated
Project details
Are you losing revenue due to missed payments, manual invoicing errors, or unreliable Stripe webhook processing? This project, "StripeFlow," delivers automated billing, seamless Stripe checkout and invoicing, coupled with robust webhook handling to ensure transactional integrity and mitigate financial risk. Many businesses experience "lost" orders or revenue leakage due to inadequate payment system integration. Our process involves a comprehensive audit of your current payment workflows, designing a secure and efficient automated billing system, and implementing resilient webhook listeners to accurately capture and process every transaction event. We focus on building a robust system where no order is ever lost, ensuring proper customer billing, subscription management, and invoice generation. The business ROI is substantial: increased revenue protection, reduced manual administrative burden, elimination of lost orders, improved customer satisfaction with accurate billing, and significant time savings for your team.
Programming Languages
JavaScript, Python, C#Coding Expertise
Localization, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$500
|
Standard
$1,500
|
Advanced
$2,500
|
|---|---|---|---|
| Delivery Time | 4 days | 5 days | 7 days |
Number of Revisions | 0 | 0 | 0 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code | - | - | - |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$150 - $200Frequently asked questions
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GB
Goran B.
Oct 7, 2025
UpWork API Key Specialist
AO
Alex O.
Jun 23, 2025
Bubble Developer for Hotel Booking Flow (using booking API)
David helped integrate a complex API into our Bubble platform and he was fantastic to work with. Always quick to respond, he went above and beyond to build custom code solutions that really fit our needs. Super reliable, knowledgeable, and easy to communicate with - we really enjoyed working with him and would definitely recommend him for any API or Bubble-related work.
PC
Piers C.
Jun 16, 2025
Bubble.io / Python - Need to send data to a python script and return the result to bubble
Great work
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EL Mahdi C.
May 13, 2025
Automate Q&As Flashcards
Great as always
SW
Swetlana W.
Apr 28, 2025
Fix push notification in firebase.
I have been working with David for a long time. Every task has been implemented superbly so far. I can recommend him!
About David
API Integration Specialist | System Architect | Backend Developer
100%
Job Success
London, United Kingdom - 8:38 am local time
I've solved this exact problem inside Mastercard and Vodafone — I know what breaks at scale before it breaks.
✮ Expert-Vetted — Top 1% on Upwork
✮ Reliably committed for 11+ years to delivering solutions for large corporations like Mastercard & Vodafone.
✮ Experienced solving enterprise-grade backend problems
✮ Architected APIs handling 100,000+ requests/second
✮ Data Driven decision making
✮ 100% customer satisfaction guarantee
Prior to freelancing I solved the hardest integration problems inside two of the world's most demanding enterprises real-time payment sync, event-driven pipelines, and third-party API orchestration under enterprise SLAs at Mastercard and Vodafone. Having architected systems supporting 1M+ daily active users and protected $2M+ in revenue through reliable API design, I can guarantee I will add measurable value to your backend. If I can't deliver, I won't charge for my time — and nobody works for free.
[ What I Build For You ]
✮ RESTful & GraphQL API Design & Architecture
✮ Payment Processor Integrations
✮ Real-Time Data Pipelines & Kafka Systems
✮ Third-Party API Orchestration & Webhooks
✮ PostgreSQL Optimisation & Query Tuning
✮ AWS Infrastructure — Lambda, API Gateway, RDS, SQS
✮ Zero-Downtime Deployments & CI/CD Pipelines
✮ SOC2 & GDPR-Compliant API Security
✮ OAuth, JWT & IAM Implementation
✮ Docker & Container Architecture
✮ API Design Reviews & Technical Leadership
✮ Engineering Team Mentorship & On-Call Rotation Setup
[ Database Expertise ]
✮ PostgreSQL — optimisation, scaling, replication
✮ Amazon RDS & Aurora
✮ Amazon DynamoDB
✮ Redis & ElastiCache
[ Infrastructure & DevOps ]
✮ AWS — Lambda, API Gateway, SQS, RDS, ECS
✮ Docker & Kubernetes
✮ CI/CD Pipeline Design
✮ Zero-Downtime Deployment Architecture
✮ Load Balancing & Rate Limiting
✮ Monitoring & Incident Runbooks
[ Proven Numbers ]
✮ 25x latency improvement — 5s → 200ms on production APIs
✮ 100,000 requests/second throughput architected
✮ $600K/year saved through query optimisation
✮ 99.99% uptime SLA delivered
✮ 1M+ daily active users supported
✮ 40% reduction in engineering incident response time
✮ $2M+ in revenue protected through reliable API uptime
[ My Domain Experience ]
✮ Payment & Fintech API Integration
✮ Real-Time Event-Driven Systems
✮ SaaS Backend Architecture
✮ Enterprise API Transformation
✮ High-Traffic Consumer Platforms
✮ API Security & Compliance (SOC2, GDPR)
✮ Engineering Team Leadership & Mentoring
I love what I do — working with founders and CTOs across industries has given me the opportunity to solve genuinely hard problems at scale. My approach goes beyond the task in front of me. I focus on building the right foundation the first time, and a long-term relationship built on results.
Drop me a message — I'll reply with a personalised Loom walking through exactly what I'd do with your specific situation.
My 6 Promises:
💎 Data-driven API decisions backed by impact metrics
💎 Production-ready delivery with 99.99% uptime mindset
💎 Proactive mentoring and knowledge transfer to your team
💎 Full ownership with formal on-call API support
💎 Professional, efficient execution under pressure
💎 Partnership approach focused on long-term scaling
Steps for completing your project
After purchasing the project, send requirements so David can start the project.
Delivery time starts when David receives requirements from you.
David works on your project following the steps below.
Revisions may occur after the delivery date.
Payment Workflow Audit
Analyze existing billing processes, Stripe integration, and identify pain points.
Solution Design & Architecture
Plan the automated checkout, invoicing, and webhook infrastructure.