
Md.Fazley Rabbi
Software Engineer Laravel
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Software Engineer - Electronic First LLE
Ecommerce • Full time
Oct 2021 - Present • 4 yrs 10 mos
Five years of deep backend work: a multi-rule fraud detection engine, real-time PayPal + Checkout.com dispute sync, ClickHouse-backed analytics, an end-to-end Personalized Gift Card platform, and a versioned REST API powering web, mobile, and an AI chatbot. • Reduced fraudulent chargebacks by designing a multi-rule checkout fraud detection engine with IP/card/email velocity checks, BIN/ASN validation, bot fingerprinting, and auth-capture workflows. • Eliminated manual dispute reconciliation by building real-time PayPal and Checkout.com dispute synchronization using webhooks, file proxying, and automated customer blocking. • Enabled data-driven decision making through ClickHouse-powered analytics covering customer behavior, product sales, payment gateway performance, and operational costs. • Built an end-to-end Personalized Gift Card platform featuring recipient management, card designer, scheduled delivery, sender/receiver dashboards, and comprehensive automated testing. • Accelerated third-party integrations by developing a versioned REST API with encrypted identifiers, Swagger documentation, and AI chatbot endpoints for orders, refunds, tickets, and products. • Increased average order value (AOV) by implementing bundle commerce across PayPal, Coinbase, eWallet, and card payments, including reviews, wishlists, and post-purchase emails. • Restored accurate marketing attribution by implementing server-side GA4 add_to_cart tracking with event_id deduplication to prevent duplicate conversion reporting.