You will get Stripe, PayPal, Razorpay, or payment gateway integration
Top Rated
Project details
Integrate secure payment gateways into your SaaS platform, website, marketplace, or custom application.
I build production-ready payment integrations—not fragile checkout hacks.
Supported payment providers:
✅ Stripe
✅ PayPal
✅ Razorpay
✅ Braintree
✅ Authorize.Net
✅ Amazon Pay
✅ PayU
✅ Square
✅ Adyen
✅ custom payment APIs
Supported payment features:
• one-time payments
• subscriptions / recurring billing
• webhook integrations
• checkout flows
• payment intent setup
• refunds
• invoices
• split payments
• marketplace billing
• wallet / saved cards
• customer billing portals
Perfect for:
SaaS billing
ecommerce payments
marketplaces
booking systems
subscription platforms
Top Rated Plus full-stack engineer with 12+ years building secure production payment systems.
I build production-ready payment integrations—not fragile checkout hacks.
Supported payment providers:
✅ Stripe
✅ PayPal
✅ Razorpay
✅ Braintree
✅ Authorize.Net
✅ Amazon Pay
✅ PayU
✅ Square
✅ Adyen
✅ custom payment APIs
Supported payment features:
• one-time payments
• subscriptions / recurring billing
• webhook integrations
• checkout flows
• payment intent setup
• refunds
• invoices
• split payments
• marketplace billing
• wallet / saved cards
• customer billing portals
Perfect for:
SaaS billing
ecommerce payments
marketplaces
booking systems
subscription platforms
Top Rated Plus full-stack engineer with 12+ years building secure production payment systems.
Programming Languages
PHP, JavaScript, PythonCoding Expertise
Localization, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$79
|
Standard
$199
|
Advanced
$449
|
|---|---|---|---|
| Delivery Time | 2 days | 4 days | 7 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 0 | 0 | 0 |
Design Customization | - | ||
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Frequently asked questions
35 reviews
(35)
(0)
(0)
(0)
(0)
This project doesn't have any reviews.
KK
Komal K.
Sep 23, 2025
Senior full-stack developer - SaaS MVP (Next.js, Node.js, AI, Contenful, AWS)
Hardik was absolutely fantastic to work with. He delivered a high-quality project using Next.js, React, and Tailwind CSS that exceeded my expectations. Communication was excellent throughout the entire process, and they were incredibly responsive and professional. I highly recommend them and would definitely hire him again for future projects. A true five-star experience!
MM
Margaret M.
Jul 17, 2024
Websiote speed improvement for miobile view and operations updates
Working with Hardik was a fantastic experience. They communicated promptly, delivered high-quality work, and met all deadlines. Their professionalism and attention to detail exceeded my expectations. Highly recommended!
MM
Margaret M.
Jun 22, 2024
Plugin updates and security Wordpress
MB
Murray B.
Jun 11, 2024
Builders Spec portal
Hardik did an outstanding job. He migrated the production server flawlessly, ensuring my product's stability. Additionally, he identified and resolved an existing issue with the AutoDesk Viewer, including 360 View, Floor Plan, 3D Model, and Gallery View integration. I am extremely impressed with his responsiveness, expertise, and dedication to this task. Hardik's work exceeded my expectations, and I will definitely keep him in mind for future projects.
KK
Komal K.
Apr 27, 2024
Nextjs Reactjs Nodejs AWS Full Stack developer required
We were thoroughly impressed with Hardik's expertise in Full Stack development and the exceptional work he delivered. Should the opportunity for collaboration arise again, we would gladly engage with him without hesitation. Thank you for your outstanding contributions.
About Hardik
Full-Stack Engineer | Next.js | Node.js | AWS | AI | Automation
100%
Job Success
Ahmedabad, India - 12:40 pm local time
I build and ship production-grade web applications — SaaS products, marketplaces, e-commerce platforms, and cloud-native systems. With 40+ completed contracts and repeat clients across 5+ years, I bring senior-level full-stack depth with the ability to integrate modern AI features your product actually needs.
If you need a reliable engineer who can own the full execution — frontend to backend to AWS infrastructure — and also add LLM-powered features, automation workflows, or AI chatbots on top, I'm the right fit.
🌐 FULL-STACK WEB DEVELOPMENT
(Where my 40+ job track record lives)
➜ Next.js 15 App Router, React, TypeScript, Tailwind CSS, SvelteKit, Angular, Vue 3
➜ Node.js, NestJS, Express, Laravel, Go, GraphQL, tRPC, REST APIs, Prisma
➜ PostgreSQL, Supabase, MongoDB, Redis, MySQL, Firebase, DynamoDB
➜ Stripe payments, Supabase Auth, Sentry, PostHog, third-party API integrations
➜ Shopify, WooCommerce, and e-commerce platform development
➜ SaaS MVPs, marketplace platforms, and subscription products
➜ Performance optimization, bug fixing, and production hardening
➜ Real-time features with WebSockets and event-driven architecture
📦 HEADLESS CMS
(Proven across 10+ platforms)
➜ Contentful, Craft CMS, Payload, Sanity, Strapi, Storyblok, WordPress (headless)
➜ CMS migrations, custom field architecture, and content modelling
➜ Headless frontend builds with Next.js and GraphQL content APIs
☁️ CLOUD & DEVOPS
(AWS across multiple production projects)
➜ AWS: EC2, S3, RDS, Lambda, ECS, CloudFront, Cognito, Bedrock
➜ Docker, Kubernetes, Terraform, GitHub Actions, CI/CD pipelines
➜ Cloud migrations, serverless architectures, infrastructure setup
➜ Vercel, Netlify, Railway deployments
➜ Security hardening, performance monitoring, and production support
🤖 AI INTEGRATION & AUTOMATION
(Actively building — strong foundation, real capability)
➜ OpenAI GPT-4o and Claude (Anthropic) API integrations into web products
➜ RAG pipeline development using LangChain, pgvector, Pinecone, and FAISS
➜ AI chatbots and conversational interfaces added to existing SaaS products
➜ Python/FastAPI backends powering AI microservices and LLM workflows
➜ n8n, Make (Integromat), and Zapier automations enhanced with LLM intelligence
➜ Slack, WhatsApp, Telegram, and email workflow automation
➜ Vector search and semantic search over internal docs and product data
➜ MCP server integrations and custom agent workflows
✅ WHY CLIENTS COME BACK
➜ Full ownership — frontend, backend, infrastructure, and integrations
➜ 40+ jobs completed, repeat clients, consistent 5-star feedback across 5 years
➜ Reliable delivery — on time, on budget, with clear communication throughout
➜ I use Claude Code and Cursor as serious engineering tools: clear specs, clean PRs, tested edge cases
➜ Deep headless CMS expertise across 10+ platforms including large-scale deployments
➜ 4+ hour overlap with US Eastern from IST — async-friendly, fast communicator
➜ Clean, documented, maintainable code — not vibe-coded chaos your next dev has to untangle
🎯 BEST-FIT PROJECTS
✔ SaaS MVP or web application from zero to production
✔ Adding AI features — chatbot, RAG system, or automation — to an existing product
✔ Headless CMS build, migration, or content architecture
✔ AWS infrastructure setup, serverless architecture, or cloud migration
✔ Marketplace, e-commerce, or subscription platform
✔ Performance optimization and production hardening
✔ Codebase cleanup — including Claude/Cursor-generated code
✔ Long-term part-time development partnership
Have a project that needs reliable senior execution? Let's talk — I'll give you an honest scope and own it from day one.
Steps for completing your project
After purchasing the project, send requirements so Hardik can start the project.
Delivery time starts when Hardik receives requirements from you.
Hardik works on your project following the steps below.
Revisions may occur after the delivery date.
Requirements Review
Understand payment provider, checkout flow, and technical requirements.
Payment Integration Development
Implement checkout, APIs, webhooks, billing logic, and secure processing.