Least but not last

• Enterprise / SaaS applications using open source technologies like PHP / MySQL using Laravel / Symfony / Code Igniter
• E-Commerce applications using Interspire (Big Commerce) / Open Cart / Magneto. Payment Gateway (Paypal - IPN, Stripe, SagePay, Authorize net, Worldpay, ECheckout, Paytabs, SecPay etc...).
• APIs Integrations (Eventbrite, Microsoft Graph APis, MailChimp, SurveyMonkey, Slack, Shipohi).
• Identity Management & Single Sign On (SSO) SAML integrations, SCIM protocol Implementation.