You will get Full Stack Developer for E-Commerce & Payment Integration
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Project details
You will get a full-featured e-commerce system or secure payment integration built for real transaction volume. As a Senior Full Stack Developer, I architect commerce platforms using React and Node.js, delivering structured payment flows with Stripe, PayPal, and custom billing engines.
Your solution will include product catalog management, shopping cart, checkout flow, recurring billing, invoice generation, and PCI-compliant payment processing - designed to support $1M+ in annual transactions with consistent performance.
I build commerce systems with secure backend validation, webhook-driven billing logic, subscription lifecycle management, and fault-tolerant infrastructure to ensure reliable uptime and accurate revenue tracking.
Whether you need a marketplace, subscription platform, or advanced payment gateway integration - you receive a scalable, production-grade system built to convert traffic into predictable revenue.
Your solution will include product catalog management, shopping cart, checkout flow, recurring billing, invoice generation, and PCI-compliant payment processing - designed to support $1M+ in annual transactions with consistent performance.
I build commerce systems with secure backend validation, webhook-driven billing logic, subscription lifecycle management, and fault-tolerant infrastructure to ensure reliable uptime and accurate revenue tracking.
Whether you need a marketplace, subscription platform, or advanced payment gateway integration - you receive a scalable, production-grade system built to convert traffic into predictable revenue.
Programming Languages
PHP, JavaScript, TypeScriptCoding Expertise
Performance Optimization, Security, DesignWhat's included $10,000
These options are included with the project scope.
$10,000
- Delivery Time 20 days
- Number of Revisions 1
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About Dmytro
Full Stack developer | Web Developer | Front End Developer
100%
Job Success
Zaporizhia, Ukraine - 5:55 pm local time
As a full stack engineer focused on production environments, I design and deliver complete end-to-end systems - from modern React-based frontends to scalable Node.js and Python backends, including API layers, cloud infrastructure, and CI/CD pipelines. My primary focus is on system reliability, performance optimization, security, and maintainable architecture over time.
What we deliver for our clients:
✅ SaaS products supporting 30,000+ active users with real-time collaboration features
✅ Platforms processing over 70,000 API requests per day with 99.95% uptime reliability
✅ Automation systems that replace manual spreadsheet-based workflows, reducing operational effort by 50-65%
✅ Scalable architectures designed to handle 5-8× traffic growth without requiring major redesigns
🔁 What I Do
📦 End-to-End Application Development
As a Web Developer with deep backend and frontend expertise, I build complete web platforms combining modern frontends, scalable backend logic, and clean architecture:
🔹 SaaS platforms
🔹 Admin dashboards & internal tools
🔹 Real-time systems
🔹 Multi-tenant architectures
🔹 Subscription & billing logic
From product discovery to deployment and scaling - full ownership of the lifecycle.
🎨 Frontend Engineering (React Ecosystem)
As a Front End Developer, I create responsive, conversion-focused interfaces using component-driven architecture:
🔹 React / Next.js applications
🔹 State management (Redux, Zustand, MobX)
🔹 Tailwind & modern UI systems
🔹 Performance optimization
🔹 Complex UX workflows
🔹 Real-time UI updates
Clean structure, reusable components, and maintainable frontend architecture.
⚙️ Backend Engineering (Node.js & Python)
I design backend systems that are modular, scalable, and integration-ready:
🔹 REST & GraphQL APIs
🔹 Microservices & modular monoliths
🔹 Async workers & background jobs
🔹 WebSockets & real-time events
🔹 External API integrations
🔹 Business logic & workflow engines
Systems built for reliability, observability, and long-term evolution.
🧩 Recent Experience
🔹 Multi-Tenant SaaS Platform for FinTech
Led architecture and development of a platform serving 50K+ monthly users across 30+ organizations.
100K+ daily API calls • 25M+ records • Subscription billing exceeding $500K/year.
🔹 Enterprise CRM System for Healthcare
Built a CRM operating in 12 countries with automated workflows and external integrations.
200K+ processed events/day • 70% reduction in manual operations.
🔹 Scheduling & Booking Platform for Real Estate
Designed complex availability logic and real-time booking flows.
20K+ bookings/month • sub-100ms response time • $1M+ annual payment volume.
🔹 Data & Analytics Platform for Retail
Developed a backend + dashboard system processing 3M+ records/day.
85% faster data preparation • sub-1s dashboard latency.
🔹 Workflow Automation Engine
Replaced spreadsheet-based processes with a structured automation system.
40K+ tasks/day • 92% fewer errors • 70% less manual work.
💻 Tech Stack
Languages: JavaScript, TypeScript, Python, PHP
Frontend: React, Next.js, Vue, Angular, Tailwind, Material UI, Laravel, Symfony
Backend: Node.js (Express, NestJS), FastAPI, Flask, GraphQL, REST, WebSockets
Databases: PostgreSQL, MongoDB, MySQL, Redis, Firebase, NoSQL, SQL
Cloud & DevOps: AWS, GCP, Azure, Docker, Kubernetes, CI/CD
Architectures: SaaS, microservices, event-driven systems, scalable modular systems
🚀 If you need a scalable web platform, not just code, but proper architecture - Let’s connect.
➡️ Invite me to your job, and I’ll help design and build a reliable, production-ready system using React, Node.js, and Python.
Last updated May 8, 2025
Steps for completing your project
After purchasing the project, send requirements so Dmytro can start the project.
Delivery time starts when Dmytro receives requirements from you.
Dmytro works on your project following the steps below.
Revisions may occur after the delivery date.
Commerce Strategy & System Architecture
I analyze your business model (one-time sales, subscriptions, marketplace) and define architecture, payment flow logic, tax rules, and integration strategy (Stripe, PayPal, custom billing).
Product Catalog & Core Commerce Logic
I implement product management, pricing rules, inventory logic, shopping cart, and checkout flow with secure backend validation and structured order processing.