You will get Secure Payment Architecture (Stripe Connect / PayPal / Custom)
Project details
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# **Secure Payment Architecture (Stripe Connect / PayPal / Custom)**
*(Keywords: Stripe, PayPal, Payment Gateway, Fintech, Marketplace)*
**Project Summary: Process payments. Prevent fraud. Track every cent.**
I am a Senior Full-Stack Engineer who has processed millions in volume for platforms like **ProRecruit**. I don't just "add a button"—I architect secure, PCI-compliant payment flows that protect your revenue.
**Why trust me?**
Most developers implement payments on the frontend (client-side), which is vulnerable to manipulation. I build **Zero-Trust Server-Side Architectures** using Cloud Functions to verify every transaction before unlocking features.
**What I Deliver:**
• **Universal Checkout:** Stripe (Credit Cards), PayPal, and region-specific methods (CinetPay/Mobile Money).
• **Deep Telemetry:** Integration with GA4/Sentry so you see revenue data in real-time.
• **Complex Logic:** Split payments (Marketplaces), Tax calculation, and subscription proration.
# **Secure Payment Architecture (Stripe Connect / PayPal / Custom)**
*(Keywords: Stripe, PayPal, Payment Gateway, Fintech, Marketplace)*
**Project Summary: Process payments. Prevent fraud. Track every cent.**
I am a Senior Full-Stack Engineer who has processed millions in volume for platforms like **ProRecruit**. I don't just "add a button"—I architect secure, PCI-compliant payment flows that protect your revenue.
**Why trust me?**
Most developers implement payments on the frontend (client-side), which is vulnerable to manipulation. I build **Zero-Trust Server-Side Architectures** using Cloud Functions to verify every transaction before unlocking features.
**What I Deliver:**
• **Universal Checkout:** Stripe (Credit Cards), PayPal, and region-specific methods (CinetPay/Mobile Money).
• **Deep Telemetry:** Integration with GA4/Sentry so you see revenue data in real-time.
• **Complex Logic:** Split payments (Marketplaces), Tax calculation, and subscription proration.
Programming Languages
JavaScript, Python, GoCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$500
|
Standard
$1,200
|
Advanced
$2,800
|
|---|---|---|---|
| Delivery Time | 3 days | 7 days | 14 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 1 | 1 | 1 |
Design Customization | - | - | |
Content Upload | |||
Responsive Design | |||
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$300 - $1,500
Additional Revision
+$300
Additional Page
(+ 1 Day)
+$200
Design Customization
(+ 2 Days)
+$300
Security Audit
(+ 1 Day)
+$300Frequently asked questions
About Kwami
Senior AI & Cloud Engineer | Full-Stack | SaaS & Automation | 15+ year
Allentown, United States - 8:10 pm local time
With 15+ years of experience across AI automation, cloud architecture, and full-stack engineering, I help companies transform complex ideas into reliable, revenue-generating software.
I’ve engineered solutions for Comcast, Idea Evolver, the Federal Reserve, and multiple startups across the US, Europe, and Africa. As a former Senior Software Engineer, Senior Cloud Engineer, and CTO/founder, I bring a rare combination of deep technical expertise and business strategy.
What I Build
🔹 AI/ML Integration & Automation
AI-powered scoring engines
Predictive analysis features
OpenAI & custom model integrations
Data workflows (Airflow, Kafka, Spark)
Intelligent automations for SaaS
🔹 Cloud Architecture & DevOps (AWS, GCP, Hetzner)
Scalable cloud systems (Lambda, ECS, Fargate, GKE)
Microservices & distributed architectures
CI/CD pipelines (GitHub Actions)
Docker containerization
Security, monitoring, & cost optimization
🔹 Full-Stack & Backend Engineering
Golang high-performance services
Node.js/Express microservices
React / Next.js front-ends
REST APIs, GraphQL
PostgreSQL, MongoDB, DynamoDB
Why Clients Trust Me
✔ 15+ Years Engineering Experience
Across enterprise, startup, and high-security environments.
✔ Delivered Multi-Million-User Solutions
Including Comcast’s omni-voice platform and ML-driven sales systems.
✔ Founder & CTO Mindset
I do more than write code — I architect systems, anticipate edge cases, and ensure long-term scalability.
✔ Cross-Cultural & Bilingual
Fluent in English & French, ideal for international teams.
✔ Strong Communication & Leadership
Led engineering teams, mentored devs, and drove projects from concept → launch → optimization.
Example Results
⚡ Built a machine-learning sales platform predicting customer pain points for Comcast
⚡ Designed cloud infrastructures reducing operational costs by 20%
⚡ Developed automated testing frameworks for enterprise SaaS platforms
⚡ Architected AI-powered scoring and automation engines for SaaS products
⚡ Delivered secure microservices and APIs supporting tens of thousands of users
Tech Stack
Languages: Go, Python, JavaScript/TypeScript
Front-End: React, Next.js, Angular
Back-End: Golang, Node.js, Microservices
Cloud: AWS (Lambda, ECS, RDS, DynamoDB, Aurora), GCP (GKE, Firestore), Hetzner
Data: Kafka, Spark, Airflow, Pandas
Infra: Docker, Kubernetes, GitHub Actions, Cloud Foundry
Databases: PostgreSQL, MongoDB, DynamoDB, Firestore
Other: Redis, ElastiCache, API design, CI/CD, security best practices (OWASP 10)
Certifications
Google AI/ML Certification
AWS Certified Solutions Architect – Cloud Quest
AWS Certified Serverless Developer – Cloud Quest
Portfolio Highlights
1. AI-Powered Applicant Scoring Engine (ATS)
Reduced screening time by 60% using custom AI workflows.
2. Omni-Voice Platform (Comcast)
Designed and built Go-based voice services integrated with Amazon Alexa and Google Actions.
3. Sales Prediction ML Platform (Comcast)
Delivered predictive analytics to power smarter sales cycles.
4. Custom CRM (KCRM) – SME Automation
Full-stack CRM with lead scoring, dashboards, and reporting.
5. Cloud Infrastructure Optimization
Migrated and modernized systems, reducing cloud costs by 20%.
Availability
✔ Full-time or part-time
✔ Flexible to US/EU/Global time zones
✔ Immediate start for serious projects
Let’s Build Something Exceptional
If you want production-grade AI features, scalable cloud architecture, or fast high-quality engineering, I’m ready to help.
Send me a message — I can share a free architecture sketch within 20 minutes.
Steps for completing your project
After purchasing the project, send requirements so Kwami can start the project.
Delivery time starts when Kwami receives requirements from you.
Kwami works on your project following the steps below.
Revisions may occur after the delivery date.
Environment & Security Audit
I review your API keys (Stripe/PayPal), current codebase, and cloud environment (AWS/GCP/Firebase). I verify that webhooks are correctly configured and that your environment variables are secure before writing any code.
Architecture & Logic Design
I map out the payment flow diagram. For standard projects, this defines the success/failure paths. For marketplaces (Advanced), I define the fund-splitting logic, platform fees, and tax reporting requirements (1099/KYC) to ensure compliance.