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Mustafizur Rahman

@mustafizurrahman4

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E-commerce systems engineer at KPOP USA who secured checkout and scaled a platform processing 236,000+ orders.

Bangladesh

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At KPOP USA, I own technical operations and checkout reliability for an e-commerce platform that has processed 236,000+ orders. I developed SentinelGuard to block card-testing attacks and unauthorized store-API scraping, and upgraded the database to HPOS while cleaning 7–8 GB of legacy metadata.

Through my independent consulting practice, I’ve delivered 200+ client engagements covering WooCommerce development, payment troubleshooting, and performance optimization. I also built open-source tools including a Shopify order-health app and a WooCommerce HPOS database patch.

Experience

Work history, roles, and key accomplishments

Current

E-Commerce & Systems Developer

Current

KPOP USA

Dec 2020 - Present (5 years 10 months)

Sole engineer owning technical operations, checkout reliability, and server uptime for a retail platform with 236,000+ orders and multi-million dollar gross sales volume. Engineered SentinelGuard checkout protection and upgraded core database to HPOS.

WooCommerce Authorize.Net Stripe PHP MySQL Redis Linux Docker Prometheus Grafana GitHub Actions Cloudflare HPOS SentinelGuard

Current

Independent E-Commerce & Platform Consultant

Current

Commercial Practice

Jan 2018 - Present (8 years 9 months)

Delivered 200+ specialized commercial client engagements including custom WooCommerce plugin development, checkout bug fixes, and performance optimization. Audited and remediated compromised e-commerce stores.

WooCommerce Payment Gateway Debugging Performance Optimization Malware Removal Security Audits Core Web Vitals

Contract Web Developer

Agency Engagements

Jan 2018 - Dec 2020 (2 years 11 months)

Built bespoke e-commerce websites and custom WooCommerce themes/plugins for European and international retail businesses. Configured payment gateways, shipping rules, tax engines, and multi-currency checkouts.

WooCommerce Payment Gateways Shipping Tax Engine Multi Currency Checkout

Education

Degrees, certifications, and relevant coursework

CoderTrust

Advanced Web Application Development, Web Application Development

Certified in Advanced Web Application Development, covering full-stack development, database architecture, and secure web application patterns.

Daffodil International University

Bachelor of Science, Computer Science and Engineering

BSc in Computer Science and Engineering, graduated in 2020. Undergraduate thesis on a computer vision sign-language recognition system using YOLOv8, TensorFlow, and CUDA.