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I’m building an e-commerce website and need an experienced web developer to handle the payment gateway integration. The product catalog and shopping cart are already in place; what’s missing is the secure, seamless checkout that lets customers pay without friction. Your task is to connect the store to a reliable gateway (Stripe, PayPal, or a comparable provider—I'm open to your recommendation) and ensure that: • all card and wallet transactions are processed securely and comply with PCI-DSS • order confirmations, payment status updates, and error handling work flawlessly • the integration plays nicely with my existing front-end and back-end stack, keeping page speed intact Once complete, I’ll test the flow end-to-end. If everything runs smoothly—no failed callbacks, no double charges, and clear logs—the job is done. Please share a brief outline of how you’d approach the integration and any similar e-commerce work you’ve shipped recently.
Project ID: 40383446
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Active 23 days ago
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282 freelancers are bidding on average $450 USD for this job

Hello, as a senior web developer with 15+ years of experience, I understand you need a secure, frictionless checkout without impacting performance. I’ll integrate Stripe/PayPal with PCI-compliant flows, robust callbacks, and clear logging, ensuring seamless compatibility with your stack. I’ve delivered similar payment integrations for e-commerce platforms. Which backend framework are you using? Any preferred gateway? Let’s discuss in chat. Best Regards, Rajat
$250 USD in 7 days
9.7
9.7

⭐️⭐️⭐️ Secure Payment Gateway Integration (Seamless Checkout + PCI Compliance) ⭐️⭐️⭐️ Hello, How are you? I understand your store is ready and you now need a secure, frictionless checkout experience. I’ll integrate a reliable gateway like Stripe or PayPal, ensuring smooth transactions without impacting performance. Deliverables: ✔ Fully functional payment integration ✔ End-to-end tested checkout flow ✔ Clean, documented code + webhook handling ✔ Support during your testing phase Let’s chat… Thanks
$580 USD in 12 days
9.6
9.6

We have few Queries : 1. Please share the link of current website. 2. Please tell whether you also need the wallet implementation on website. 3. What platform is the store built on? Regards, Rupam
$250 USD in 3 days
9.1
9.1

With thorough expertise in API integration, e-commerce, HTML, payment gateway integration, and PHP, our team at CnELIndia is well-positioned to meet your project's requirements head-on. Our proficiency extends to various payment gateway providers including Stripe and PayPal - we will ensure a seamless connection between your store and the most reliable gateway for your needs. Furthermore, our substantial experience in similar projects ensures we proactively adhere to strict security standards such as PCI-DSS compliance. Your customers' data will be handled with utmost care and their transactions will be processed without any hassle or errors. We understand that a well-integrated payment system is the backbone of any e-commerce platform, and we guarantee order confirmations, status updates, and error handling that work flawlessly 100% of the time. To wrap it up, we appreciate your focus on page speed and can confidently assure you that our integration won't compromise it. In fact, your users won't even notice a difference - the integration will be smooth enough to keep their shopping experience as seamless as ever. Choose CnELIndia for skilled professionals backed by almost two decades of experience - let us make your e-commerce venture the best it can be.
$500 USD in 7 days
9.1
9.1

As an experienced web developer specializing in e-commerce solutions, I understand the critical importance of seamless payment gateway integration. I have successfully integrated payment gateways like Stripe and PayPal, ensuring secure transactions and PCI-DSS compliance. My approach involves meticulously connecting the store to the chosen gateway, focusing on flawless order processing, payment status updates, and error handling. I prioritize maintaining page speed and ensuring smooth interaction with existing front-end and back-end systems. Recently, I completed a similar e-commerce project for a client, achieving a streamlined checkout process and enhanced user experience. I look forward to discussing my integration strategy in detail and sharing my relevant experience to ensure a successful implementation for your e-commerce website.
$350 USD in 3 days
8.4
8.4

Hi, I can seamlessly integrate either Stripe or PayPal while ensuring it meets PCI-DSS compliance. My approach would start with assessing your current setup, followed by establishing a secure connection to the gateway. I would implement a robust error handling system and integration with your front-end and back-end, ensuring optimal performance and speed. I’ve worked on similar projects, integrating payment solutions that provide a frictionless checkout experience. You can expect clear order confirmations and efficient payment processing with no double charges. Let’s discuss the specifics and make your checkout flow smooth. I’m looking forward to working with you! Best Regards, Priyanka
$500 USD in 7 days
8.5
8.5

Hi, This is Elias from Miami. I checked your project description and understand you’re looking to integrate a payment gateway into your e-commerce website. This will enable smooth and secure transactions for your customers. I have experience with payment gateway integrations, including PayPal API, and I'm well-versed in ensuring PCI compliance to keep your transactions secure. I’d be happy to go through the details and suggest the best technical approach. I have a few questions to get a better understanding: Q1 – What specific payment gateways are you considering besides PayPal? – Q2 – Are there any existing systems or platforms that we need to integrate with? – Q3 – What user roles and permissions do you envision for managing transactions? Looking forward to hearing from you.
$600 USD in 3 days
8.1
8.1

Interesting project, I will integrate your payment gateway — Stripe and PayPal — with secure checkout, order confirmations, webhook-driven status updates, and clear error handling, all without disrupting your existing stack or page speed. One thing I will prioritize: using Stripe's Payment Intents API with server-side confirmation rather than client-side tokenization alone. This ensures idempotent charges — eliminating double-charge risks if a customer refreshes mid-payment — and keeps your PCI scope minimal since raw card data never touches your server. Questions: 1) What is your current back-end stack — Node, PHP, Python, or something else? 2) Do you need subscription or recurring billing support, or is this strictly one-time purchases? Looking forward to your response. Best regards, Kamran
$270 USD in 10 days
8.4
8.4

Hello, I can integrate a secure Stripe or PayPal gateway into your existing store, ensuring smooth checkout, PCI compliance, and reliable transaction handling. I understand how critical error-free payments and fast performance are. Would you like me to implement both gateways for flexibility and testing? Let’s have a chat to discuss further. Regards, Ranjika.
$250 USD in 7 days
7.8
7.8

Hi, I can handle your payment gateway integration and ensure a smooth, secure checkout experience without affecting your current setup. I’ll integrate Stripe or PayPal (or recommend the best fit), configure secure transaction handling (PCI-compliant flow), and ensure proper order confirmations, callbacks, and error handling. I’ll also test edge cases like failed payments, retries, and duplicate charge prevention to guarantee reliability. The integration will be optimized to work seamlessly with your existing frontend/backend while maintaining performance and page speed. Timeline: 2–3 days Let’s connect to finalize the gateway and get started. Best Regards, Jitendra N.
$250 USD in 3 days
7.7
7.7

Hi there, You already have the catalog and cart in place, so the priority is adding a secure checkout that works cleanly with your existing front-end/back-end and does not slow the store down. I can integrate Stripe, PayPal, or the best-fit gateway for your stack, handling secure card/wallet payments, payment status callbacks/webhooks, order confirmations, failed-payment handling, clear logs, and end-to-end testing to prevent double charges or missed orders. My approach would be to review your current checkout flow first, connect the gateway in sandbox, test all success/failure scenarios, then move to live mode safely. This fits my eCommerce work with payment gateways, checkout flows, webhooks, and order-status logic. What platform or stack is the store built on? Do you already have Stripe/PayPal accounts ready? Should checkout be hosted or embedded? Qasar
$250 USD in 3 days
7.7
7.7

Hi, I’ve read your requirements carefully and I can handle the payment gateway integration to deliver a secure, smooth checkout experience. I’ve already developed similar e-commerce platforms with Stripe and PayPal integrations, including end-to-end payment flows. My approach: • Review your current stack and cart flow to align the integration cleanly • Implement Stripe/PayPal (or suggest best-fit) with secure tokenization (no sensitive data stored) • Set up webhooks for real-time payment status, order confirmation, and retries • Add robust error handling (failed payments, retries, edge cases) • Ensure fast checkout performance with minimal impact on page speed • Test thoroughly Quick questions: Which backend and frontend stack are you currently using? Do you need support for wallets/UPI or just cards initially? Happy to get started right away. Thanks Espsofttech
$500 USD in 7 days
7.8
7.8

Hi, We’ve integrated multiple payment gateways like Stripe and PayPal in various e-commerce projects, ensuring PCI compliance and seamless user experiences. We also handle server-side logic to manage webhooks and ensure that order statuses are updated accurately. For your project, I’d recommend using Stripe as it offers a fully customizable checkout experience, allowing us to create a checkout page that matches your site’s branding. We can also implement features like one-click payments for returning customers. We can schedule a 10-minute introductory call to discuss your project in more detail and see if I’m the right fit. I usually respond within 10 minutes. Let’s connect and get your project moving. Best regards, Adil
$569.05 USD in 7 days
7.3
7.3

Hi, I can seamlessly integrate a secure payment gateway into your store, ensuring fast, reliable checkout with proper error handling, logging, and PCI compliance. I’ll test callbacks, confirmations, and edge cases to avoid failures or duplicate charges. I’ve handled similar integrations and can deliver a stable, production-ready setup quickly. Thanks Joya.
$250 USD in 7 days
7.1
7.1

I HAVE IMPLEMENTED SECURE, HIGH-PERFORMANCE PAYMENT GATEWAY INTEGRATIONS (STRIPE, PAYPAL) FOR E-COMMERCE SYSTEMS—ENSURING SMOOTH CHECKOUT AND ZERO PAYMENT FAILURES. I can seamlessly integrate a reliable payment gateway into your existing store while maintaining speed, security, and a frictionless user experience. **Approach:** • Review your current frontend/backend flow and checkout logic • Integrate Stripe/PayPal (recommended based on your region & needs) • Implement secure payment handling (tokenization, no sensitive data storage) • Set up webhooks for real-time payment status updates • Handle edge cases (failed payments, retries, duplicate prevention) • Ensure proper order confirmation, logging, and error handling **Core Features:** • PCI-DSS compliant integration (via gateway standards) • Smooth checkout experience (cards, wallets if enabled) • Reliable webhook/callback system • Clear transaction logs and status tracking • Optimized performance (no impact on load speed) **User Roles:** • Admin: Monitor payments, orders, and logs • Customers: Fast, secure, and seamless checkout I will ensure zero issues like double charges, failed callbacks, or inconsistent states. Additionally, I provide **2 years of free ongoing support** for maintenance and fixes. Ready to review your stack and start immediately.
$300 USD in 7 days
7.3
7.3

Hi Your checkout is the last critical layer, and the main technical risk is making payment processing secure and reliable without slowing down the current shopping experience. I work with Stripe, PayPal, REST APIs, webhooks, JavaScript, and backend integrations to add PCI-aware checkout flows that fit cleanly into existing e-commerce systems. A common issue in payment gateway projects is that the checkout appears to work, but webhook failures, duplicate requests, or weak error handling create missing orders or double charges later. I solve that by implementing idempotent payment handling, verified webhook processing, clear transaction logs, and a checkout flow that keeps payment status, order confirmation, and customer messaging fully synchronized. I can integrate Stripe, PayPal, or another suitable provider based on your stack and target customers, while keeping the frontend responsive and the backend maintainable. My recent e-commerce work has included secure payment integrations, callback validation, refund handling, and end-to-end checkout testing across live and sandbox environments. You’ll get a smooth payment experience, strong logging, and a setup that is easier to monitor and support after launch. Thanks, Hercules
$750 USD in 7 days
6.6
6.6

Hello, I understand you need secure payment gateway integration for your e-commerce site. Connecting Stripe or PayPal for seamless transactions, ensuring PCI-DSS compliance, and smooth order updates are key. I can handle this with your existing setup. I'm confident I can deliver a flawless checkout experience. Regards, Parvesh M.
$250 USD in 3 days
6.4
6.4

Greetings, I'm a full stack developer with 10+ years of experience, I can implement a secure, production-ready payment gateway integration (Stripe/PayPal recommended based on your stack and region) with full PCI-compliant flow, reliable webhook handling, and clean order state management. I’ve integrated checkout systems for e-commerce platforms ensuring zero double-charging, accurate payment reconciliation, and smooth UX without impacting performance. Why work with me? ★ Proven track record: 73 successful projects with 5-star reviews ★ Expertise in Node.js, Angular, React, Express, Python, Django, Flask, PHP, Laravel, Codeigniter and more ★ Responsive, deadline-focused, and committed to results ★ 3 months of free post-launch support Let’s schedule a quick chat to discuss your preferred tech stack, timelines, and launch goals. I’m confident I can bring your vision to life. Best regards, Samar H.
$400 USD in 7 days
6.1
6.1

Greeting! I specialise in secure payment integrations for eCommerce with 9+ years of experience implementing Stripe, PayPal, and custom checkout flows that convert reliably. Here’s how I can help: * Recommend the best gateway (Stripe for flexibility + wallets, PayPal for trust/alt payments) * Integrate secure checkout (PCI-compliant via tokenization, no card data stored) * Handle payments, webhooks, and callbacks for accurate order status updates * Implement robust error handling (failed payments, retries, edge cases) * Ensure no duplicate charges with idempotency and proper session handling * Optimise checkout speed and UX so it stays frictionless * Set up logs and test flows (sandbox → live) for full reliability My approach: 1. Review your current cart/backend 2. Implement gateway SDK + secure endpoints 3. Configure webhooks (success, failure, refunds) 4. Test full flow end-to-end before launch Quick questions: What stack is your backend built on? And do you need subscriptions/recurring payments or just one-time checkout?
$500 USD in 7 days
6.0
6.0

Hello There!!! ★★★★ (Reliable payment gateway integration with secure checkout & flawless transaction flow) ★★★★ I understand your store is ready and you need a smooth, secure payment integration with Stripe/PayPal ensuring PCI compliance, proper callbacks, and no failed or duplicate transactions. ⚜ Stripe / PayPal API integration ⚜ Secure checkout implementation ⚜ PCI-DSS compliance handling ⚜ Webhooks & callback setup ⚜ Order & payment sync ⚜ Error handling & logging ⚜ Performance optimization I have experince in integrating payment gateways in e-commerce platforms, ensuring safe and fast transactions with proper validation and logs. I will integrate using secure APIs, test all edge cases like failures, retries, refunds and ensure smooth flow without breaking speed. Let’s connect and finalize the gateway and flow. Warm Regards, Farhin B.
$256 USD in 10 days
6.5
6.5

Waldorf, United States
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