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English
$
USD
I will integrate stripe paypal square apple payment gateway on wordpress, wix, shopify
Malcom D
Level 1
4.5
4.5
About this gig
STOP LOSING SALES TO CHECKOUT ERRORS
Your payment gateway shouldn't be a barrier, it should be a money-printing machine.
I specialize in seamless payment integrations that actually WORK:
Stripe, PayPal, Square, Klarna, Apple Pay, Google Pay, Wise
Shopify, WordPress (WooCommerce), Wix tested on real transactions
Error-free setup with webhooks, tax calculations, and currency conversion
Mobile-optimized checkout (70% of sales happen on phones)
WHAT I INTEGRATE:
- PayPal
- Stripe
- Apple Pay
- Square
- Skrill
- Klarna
- Payoneer
- Google Pay
- BitPay
- WorldPay
- PayU
- CoinGate
- Afterpay
- Sofort
- ZipPay
- Authorize.Net
- Flutterwave
- Paystack
- GB Prime
- Payment settings configuration
- Payment gateway testing
- MicroPayment
- Billpz
- CenPos WebPay
- PinWheel
- Sopay
- Viva Wallet
WHAT I FIX:
-"Invalid credentials" errors
- Abandoned carts due to payment failures
- Missing webhook configurations
- Regional payment method restrictions
Get in touch with me now to discuss and get started right away.
Malcom.
Delivery style preference
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Get to know Malcom D
Malcom D
Here for YOU !
Level 1
- FromNigeria
- Member sinceJan 2025
- Avg. response time1 hour
- Last delivery4 weeks
Languages
English, Spanish
Struggling with a broken Shopify checkout, a payment gateway that won't go live, or a API integration issues? That's exactly what I fix.
I build conversion-focused stores from scratch and untangle the technical problems that are costing you sales: failed checkouts, misconfigured gateways, broken API connections, and slow or buggy storefronts.
I'm Malcolm, a Shopify and payments specialist with 35+ completed projects across Stripe, Shopify, PayPal, Klarna, Square, and WooCommerce integrations.
Kindly message me before you order, I'll make sure we're the right fit before you spend a dollar
My Portfolio
FAQ
Can you set up a custom pricing form that feeds directly into my existing checkout (without forcing me to use a cart)?
Absolutely. I’ve worked with tools like WPForms, custom JavaScript or backend hooks so that your customers fill out a bespoke form (for quotes, subscriptions, donations, etc.) and get sent straight to your payment gateway checkout. No extra cart pages needed!
Is it possible to offer multiple gateways (Stripe, PayPal, Flutterwave, etc.) on the same checkout page and have them all play nicely together?
Yes, whether you want to let customers choose at checkout or process behind the scenes, I can integrate two or more processors in parallel. I’ll configure routing rules, ensure compatibility on desktop & mobile, and test transactions so you never hit gateway limits or errors.
How can I ensure my payment flow works smoothly on mobile browsers?
Mobile checkout quirks happen (modals, pop‑ups, 3D Secure toggles). I’ll audit your theme or front‑end scripts, adjust modal behaviors, and optimize for browsers like Safari, Chrome, and Brave on iOS/Android, so payments never break when customers tap “Pay” on their phones.
I want to collect tips or add‑on fees (e.g., donation, service charge) mid‑flow. Can you integrate that?
For sure. Whether it’s a “tip” button, optional upgrade, or dynamic fee, I can build in extra line‑items that seamlessly pass through to your payment gateway. I’ll handle the front‑end button, backend math, and final checkout so every extra cent lands in your account.
I'm getting errors like “Invalid Client ID” or “Authentication failed”, can you fix that?
Yes, I can troubleshoot these types of issues. These errors usually mean the API keys are wrong, you're mixing up sandbox/live credentials, or something's missing in your app setup. I’ll help you audit and fix the configuration so your payment gateway connects correctly.
How can I test if my payment system is working before going live
I’ll help you set up sandbox (test) mode using sample card numbers and payment scenarios. You’ll also learn how to trigger and verify webhooks, simulate payment errors, and make sure everything works perfectly, before accepting real money.
Can I make the payment form match my website’s design?
Yes, I can customize the checkout form or payment buttons to fit your brand. Whether you want a full-page checkout, a popup modal, or embedded fields, I’ll make sure it looks and feels just right while staying secure and compliant.
Is your setup secure and PCI compliant?
Definitely. I follow best practices like using tokenization, HTTPS, and secure JavaScript SDKs from the gateway provider. You won’t have to store sensitive card data yourself, keeping you safe and reducing your PCI scope.
Reviews
10 reviews for this Gig
| (7) | ||
| (2) | ||
| (0) | ||
| (0) | ||
| (1) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
A aljawharah97
Saudi Arabia
Cooperative, patient, and truly one of a kind. He completes his work in an excellent and professional manner. I am grateful for his dedication and hard work🙏✨✨.
Up to $50
Price
1 day
Duration
Helpful?J jay_ray72
United States
His very understanding and tries his best to accommodate for you in order to get you what you need. I will contuine working with him because of that, and I cant wait.
$200-$400
Price
6 weeks
Duration
Helpful?D diaz_turner89
Repeat Client
United States
Seamless Experience After his fixes, everything loads instantly and my checkout feels smoother. He’s reliable, fast, and really knows payment integrations. Will definitely come back for more :) Highly recommended
Up to $50
Price
4 days
Duration
Helpful?D diaz_turner89
Repeat Client
United States
Malcom was incredible I was stuck with an Airwallex ‘invalid credentials’ error for days, but he quickly diagnosed the real issues, the missing webhook, activation problems, and wrong Shopify sync. Fixed everything fast, explained each step clearly, and my store now processes payments perfectly. Highly recommended
Up to $50
Price
3 days
Duration
Helpful?K 
kjtwist
United States
Malcom is a true professional. A very difficult and complex job. perfectly executed
Up to $50
Price
12 days
Duration
Helpful?
Reviews
10 reviews for this Gig
| (7) | ||
| (2) | ||
| (0) | ||
| (0) | ||
| (1) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
A aljawharah97
Saudi Arabia
Cooperative, patient, and truly one of a kind. He completes his work in an excellent and professional manner. I am grateful for his dedication and hard work🙏✨✨.
Up to $50
Price
1 day
Duration
Helpful?J jay_ray72
United States
His very understanding and tries his best to accommodate for you in order to get you what you need. I will contuine working with him because of that, and I cant wait.
$200-$400
Price
6 weeks
Duration
Helpful?D diaz_turner89
Repeat Client
United States
Seamless Experience After his fixes, everything loads instantly and my checkout feels smoother. He’s reliable, fast, and really knows payment integrations. Will definitely come back for more :) Highly recommended
Up to $50
Price
4 days
Duration
Helpful?D diaz_turner89
Repeat Client
United States
Malcom was incredible I was stuck with an Airwallex ‘invalid credentials’ error for days, but he quickly diagnosed the real issues, the missing webhook, activation problems, and wrong Shopify sync. Fixed everything fast, explained each step clearly, and my store now processes payments perfectly. Highly recommended
Up to $50
Price
3 days
Duration
Helpful?K kjtwist
United States
Malcom is a true professional. A very difficult and complex job. perfectly executed
Up to $50
Price
12 days
Duration
Helpful?
