
Nasir Ali
Full Stack Web Developer, PHP, Laravel, Vue js, Payment Gateways, PSPs
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Portfolio
Work experience
Senior Software Engineer
Developers Studio • Full-time
Jun 2022 - Present • 4 yrs 4 mos
. Designed and optimized relational databases and system architecture for scalable fintech applications . Integrated multiple Payment Service Providers (PSPs) including Stripe, Checkout.com, Worldpay, PaySafe, Intergiro, Rendix, Paymatico, Apple Pay, and Google Pay . Built secure payment processing workflows following PCI-DSS compliance standards . Developed a PCI-compliant hosted payment gateway allowing merchants to securely redirect customers and manage transactions . Implemented KYC/KYB verification systems integrating providers such as Onfido, seBankID, and Alice AML, including auto-capture verification flows . Engineered high-performance backend services handling high-volume transaction processing . Optimized database queries and backend logic resulting in significant improvements in API response time and system performance . Designed and implemented scalable payment orchestration supporting multiple PSPs with high daily transaction volumes . Developed fintech features including: . Virtual card issuance systems . Crypto buy/sell integrations . Digital currency transaction processing . Transaction monitoring and risk scoring modules . Performed backend testing and code quality improvements through structured code reviews and automated testing . Collaborated with frontend teams using Vue.js to build transaction dashboards, merchant panels, and risk management tools . Built secure REST APIs with authentication using JWT and OAuth . Improved system reliability through logging, monitoring, and performance optimization