Configure 35 E-Commerce Payment Gateways

I need a developer who can take full ownership of opening, configuring, and technically integrating accounts for thirty-five separate payment providers on my e-commerce sites. All integrations will run on standard website stacks, not mobile or desktop apps, and each gateway must successfully process both credit/debit card transactions and the cryptocurrency options that the providers allow.

Here’s what the job looks like from my side: I will supply access to the sites, the list of providers, and any required corporate documentation. You will handle the account applications where needed, obtain and secure API keys or SDKs, install the gateways, map the required webhooks, and make sure that successful, failed, and refunded payments are reported correctly in the site’s back-office. Every provider must pass end-to-end sandbox testing before we go live, and then complete a live $1 test charge in production.

Deliverables:
• Active, verified merchant accounts for all 35 providers
• Cleanly coded integrations (PHP or Node are fine, but keep the architecture consistent across all gateways)
• Transaction, refund, and error logging wired into the existing admin dashboard
• A concise implementation guide covering credentials, callback URLs, and any cron jobs or webhooks you added
• Final test report showing sandbox and live transaction IDs for every provider

I’m looking for someone who has already connected multiple gateways—Stripe, PayPal, Coinbase Commerce, Authorize.Net, etc.—and understands PCI-DSS, SSL, and basic cryptography best practices. If you’ve built tokenized card flows or on-chain payment confirmations before, mention it.

Timeline is tight, so let me know how many gateways you can onboard per week and any prerequisites you need from me up front.

the underlisted are the providers we need

Aamarpay 1 0 Enabled

Authorize.net 11 0 Enabled

bKash 1 0 Enabled

BTCPay 2 0 Enabled

Binance 3 0 Enabled

Blockchain 1 0 Enabled

Cashmaal 2 0 Enabled

Checkout 10 0 Enabled

Coinbase Commerce

Coingate

CoinPayments

CoinPayments

Flutterwave

Instamojo

Mercado Pago

Mollie

NMI

Now payments checkout

Now payments hosted

Payeer

Paypal
Paypal Express

PayStack

PayTM

Perfect Money

RazorPay

Skrill
SslCommerz

Stripe Hosted
Stripe Storefront

Stripe Checkout

2Checkout