You will get Payment Gateway Integration | Stripe, PayPal, Authorize.net, Adyen & Klarna
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Project details
Stripe or Adyen? Braintree or Authorize.net? One gateway or a routing layer across several? Picking the wrong one costs you in fees, declines, and a painful migration later. I've integrated payment systems across the US, EU, and MENA markets. Not sure which gateway or losing revenue to declines? Message me for a clear answer.
I can help with:
1. Gateway Selection: Fee, decline rate, and feature comparison for your market and model
2. Decline Recovery & Routing: Smart routing, retries, and failover across processors to recover lost revenue
3. Gateway Migration: Move processors without losing saved cards or subscriptions
4. US & Global: Stripe, Adyen, PayPal, Braintree, Checkout.com, Authorize.net, Square, Worldpay, NMI
5. EU & UK: Mollie, GoCardless, Klarna, Trustly, iDEAL, Bancontact, SEPA, and PSD2/SCA compliance
6. MENA & Emerging: Tap, Tabby, Tamara, PayTabs, Moyasar, HyperPay, Paymob, Razorpay, Paystack
7. SaaS & MoR: Paddle, Lemon Squeezy, FastSpring, Chargebee, and merchant-of-record setup
8. Bank Payments & Payouts: Plaid, ACH, Wise, Deel, and multi-currency cross-border transfers
I can help with:
1. Gateway Selection: Fee, decline rate, and feature comparison for your market and model
2. Decline Recovery & Routing: Smart routing, retries, and failover across processors to recover lost revenue
3. Gateway Migration: Move processors without losing saved cards or subscriptions
4. US & Global: Stripe, Adyen, PayPal, Braintree, Checkout.com, Authorize.net, Square, Worldpay, NMI
5. EU & UK: Mollie, GoCardless, Klarna, Trustly, iDEAL, Bancontact, SEPA, and PSD2/SCA compliance
6. MENA & Emerging: Tap, Tabby, Tamara, PayTabs, Moyasar, HyperPay, Paymob, Razorpay, Paystack
7. SaaS & MoR: Paddle, Lemon Squeezy, FastSpring, Chargebee, and merchant-of-record setup
8. Bank Payments & Payouts: Plaid, ACH, Wise, Deel, and multi-currency cross-border transfers
Programming Languages
JavaScript, Python, Ruby/Ruby on RailsCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, DesignWhat's included
| Service Tiers |
Starter
$150
|
Standard
$200
|
Advanced
$300
|
|---|---|---|---|
| Delivery Time | 2 days | 5 days | 10 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
+$50 - $150
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Chris D.
Jan 21, 2026
Senior Rails Developer – AI-First Development (Claude Code / Cursor Required)
Zubair knocked it out of the park on a ServiceTitan integration project for us. He came in, got up to speed on our Rails codebase fast and wrote clean backend code that matched our existing patterns without hand-holding. Highly recommended.
IA
Irena A.
Aug 26, 2025
DevOps & Database Engineer and a senior ruby on rails developers for SaaS EMBS Platform–Multi-Tenant
Great experience working with Zubair. He set up our infrastructure efficiently, communicated clearly, and delivered everything on time. Highly reliable and skilled in DevOps—would definitely work with him again.
TB
Timo B.
Aug 4, 2024
Redesign platform product flow (figma)
Exceptional freelancer. Went above and beyond to finish the job. Very skilled designer and Figma pro. I'm overall very pleased and look forward to working more with Zubair.
About Zubair
Full-Stack Ruby on Rails Dev | AI, JS, React, Python, AWS
100%
Job Success
Lahore, Pakistan - 2:09 am local time
With 5+ years of full-stack experience in Ruby on Rails, Python, and JavaScript, I've built AI-powered products, SaaS, fintech, healthcare, edtech, marketing, SEO, and D2C solutions used by the 𝐔𝐒 𝐆𝐨𝐯𝐭, 𝐌𝐢𝐜𝐫𝐨𝐬𝐨𝐟𝐭, 𝐔𝐛𝐞𝐫, 𝐏𝐞𝐩𝐬𝐢𝐂𝐨, and 𝐇𝐚𝐫𝐯𝐚𝐫𝐝.
💡𝐇𝐨𝐰 𝐈'𝐥𝐥 𝐛𝐮𝐢𝐥𝐝 𝐲𝐨𝐮𝐫 𝐯𝐢𝐬𝐢𝐨𝐧:
✔️ AI-Powered Development: Faster and higher-quality delivery using AI coding tools like Claude, Codex, Cursor, Kiro, and GitHub Copilot.
✔️ Forward Deployed Engineering: Turn complex requirements into production-ready solutions, working closely with your team from technical discovery through deployment.
✔️ Ruby on Rails Development: Build high-performance SaaS platforms and custom web applications, engineered to scale and meet your unique business needs.
✔️ AI Integration, LLM & Smart Automation: Enhance your apps with AI-driven features, predictive analytics, and smart automation, including AI chatbots, AI-powered search, content generation, and workflow automation using OpenAI and Claude.
✔️ Full-Stack Web Development: Modern, responsive, user-centric frontends in React, Next.js, and Vue.js, seamlessly integrated with robust Ruby on Rails, Python, and Node.js backends, plus database design, background jobs, and performance optimization.
✔️ API Development & Integration: Secure, efficient GraphQL, RESTful, and SOAP APIs to connect your services and third-party platforms.
✔️ Cloud Deployment & DevOps: Reliable CI/CD pipelines and cloud hosting on AWS, Render, and Heroku with Docker for smooth, scalable deployments.
🛠️ 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤:
✔️ Rails Ecosystem: Hotwire, Turbo, Stimulus, Sidekiq, ActiveRecord, Devise, Action Cable
✔️ Backend: Ruby on Rails, Python, Node.js, REST, GraphQL, MVC
✔️ Frontend: React, Next.js, Vue.js, JavaScript, TypeScript, Tailwind CSS
✔️ AI & Automation: OpenAI, Claude, Intercom, LLM integration, chatbots, workflow automation
✔️ Cloud & DevOps: AWS, Render, Heroku, Docker, Kamal, CI/CD, Git
✔️ Databases: PostgreSQL, MySQL, MongoDB, Redis
✔️ Testing: RSpec, Selenium, Capybara, Cucumber, Jest, Minitest
✔️ Analytics & Tracking: Google Analytics 4 (GA4), Google Tag Manager (GTM), Google Search Console, Conversion tracking
✔️ SEO Engineering: Programmatic SEO, schema markup (JSON-LD), sitemap architecture, canonicalization & redirects, technical audits, Ahrefs, Semrush, Screaming Frog
📩 Let's build something great together.
Steps for completing your project
After purchasing the project, send requirements so Zubair can start the project.
Delivery time starts when Zubair receives requirements from you.
Zubair works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery, Integration & Testing
We start with a quick call to confirm your gateway (Stripe, PayPal, Adyen, Klarna, etc.), currencies, and flows like payments, subscriptions, or refunds. I then integrate the API securely, handle webhooks, and test in sandbox before going live.