Sujip Thapa sudiptpa

Sujip Thapa

Senior Software Engineer for commerce platforms, payment systems, SDKs, and production PHP packages.

I build software for the parts of a product that must keep working after launch: checkout, payments, shipping, APIs, webhooks, admin tools, catalog flows, and third-party integrations.

My work sits mostly in the PHP and Laravel ecosystem, with React and TypeScript on the frontend when the product needs rich interfaces. I like systems with clear domain boundaries, small package surfaces, typed models, useful tests, and documentation that helps another developer ship with confidence.

I also use modern automation and machine-assisted workflows for research, review, refactoring, documentation, and maintenance. The point is simple: better feedback, better code, and less manual drag around serious engineering work.

12+ years
_{software engineering}

17
_{Packagist packages}

247k+
_{package downloads}

20+
_{payment integrations}

Work With Me

I am open to selected freelance, contract, and casual work, from focused fixes to full web application builds. I am a strong fit for Laravel, PHP, commerce, payments, API integrations, dashboards, internal tools, and production systems that need careful engineering. I am also comfortable taking a product from code to a stable live environment, with attention to servers, databases, DNS, security, and deployment flow.

For larger projects, I have a close circle of trusted developers and product designers I can bring in to help deliver a high-quality product.

Web applications
_{Laravel platforms, React interfaces, admin tools, dashboards, customer portals, internal systems.}

Commerce and payments
_{Checkout flows, gateway integrations, webhooks, order state, shipping, marketplace and accounting links.}

Product delivery
_{API design, SDKs, legacy modernization, production debugging, documentation, and team-friendly handover.}

Engineering Profile

Backend and Platform _{PHP, Laravel, REST APIs, queues, webhooks, MySQL, MariaDB, package design, service boundaries.}	Commerce Systems _{Checkout, payments, shipping, inventory, marketplaces, product data, multi-storefront workflows.}
Integrations _{PayPal, Adyen, eBay, Xero, carrier APIs, manufacturer feeds, webhook verification.}	Frontend and Delivery _{React, TypeScript, Inertia, Livewire, Blade, Alpine.js, Tailwind CSS, PHPUnit, Pest, Docker, GitHub Actions, AWS, Linux.}

Open Source Portfolio

All packages below are published on Packagist under sudiptpa/*, sorted by current download count, highest first.

sudiptpa/guid	Lightweight GUID generation for modern PHP applications. _{Small package surface, zero runtime dependencies, stable helper API, modern tooling.}
sudiptpa/ipstack	PHP client for ipstack geolocation APIs. _{Typed responses, clear client boundaries, PSR transport support, predictable exceptions.}
sudiptpa/paypal-ipn	Modern PayPal IPN verification for legacy PayPal workflows. _{Fluent API, framework-agnostic transport, migration path, production-focused behavior.}
sudiptpa/omnipay-nabtransact	Omnipay gateway for NAB Transact payment processing. _{Checkout and transaction flows built around the Omnipay payment ecosystem.}
sudiptpa/xero-php-sdk	Fluent PHP SDK for Xero APIs. _{Tenant-aware OAuth2 flows, rich domain models, broad API coverage, custom transport support.}
sudiptpa/geoip	Simple IP geolocation library for PHP. _{Earlier geolocation package, now superseded by the newer ipstack client.}
sudiptpa/omnipay-esewa	eSewa payment integration package for PHP applications. _{Checkout, verification, status flows, callback validation, test-friendly integration patterns.}
sudiptpa/omnipay-openpay	Omnipay gateway for OpenPay payment processing. _{Payment gateway integration for checkout and transaction workflows.}
sudiptpa/wise-php-sdk	Framework-agnostic SDK for Wise Platform integrations. _{Request and response models, explicit client boundaries, maintainable finance workflows.}
sudiptpa/khalti-sdk-php	PHP SDK for Khalti payment integrations. _{Clean package structure, safer request handling, framework-agnostic usage, practical docs.}
sudiptpa/paypal-rest	Omnipay gateway for PayPal REST payments. _{Payment processing integration built around the Omnipay ecosystem.}
sudiptpa/zippay	ZipPay driver for Omnipay payment processing. _{Checkout integration for ZipPay-style payment flows.}
sudiptpa/paypal-notifications	PayPal notifications SDK for Webhooks and IPN. _{Webhook models, signature verification, retry controls, token cache patterns, idempotency support.}
sudiptpa/filament-turnstile	Cloudflare Turnstile field for Filament forms. _{Bot-resistant form protection for Filament applications.}
sudiptpa/transdirect	Dependency-free PHP client for the Transdirect REST API. _{Shipping and logistics API integration with a small package surface.}
sudiptpa/laravel-sent-dm	Laravel adapter for the Sent.dm unified messaging API. _{SMS, WhatsApp, and RCS messaging through a fluent Laravel interface.}
sudiptpa/omnipay-mpgs	Omnipay gateway for MPGS payment processing. _{Payment gateway integration for MPGS-backed transaction flows.}