Portfolio

Production applications I've built — from multi-tenant SaaS to enterprise platforms

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Medical Cleaning Services Management Platform

Upwork (Oct 2023 - Present)

Solo-builtEnterprise-gradeReal-time tracking

Solo-built enterprise operations platform with complete job scheduling, GPS tracking, QR code integration, multi-role access system (Employee, Client, Admin, Super Admin), real-time notifications, client portal, PDF reports, and bulk Excel imports. Production-ready with comprehensive RSpec testing.

Ruby on RailsHotwireTurboSolid QueueMySQLDockerKamal
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Book Publishing Management Platform

GoTabs Consulting (Jun 2022 - Present)

Multi-tenant SaaS4 API integrationsComplex royalty logic

Multi-tenant SaaS with automated royalty calculations (chain, direct, legacy methods), contract management, author portal with earnings visibility, and sales analytics. Integrated with Forlagssentralen, WooCommerce, Tripletex, and Stripe for billing.

Rails 8PostgreSQLHotwireStripeMulti-tenantDockerKamal
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Beauty Pro Job Board & Hiring Platform

Upwork (Jan 2022 - Present)

Two-sided marketplaceOAuth APISubscription billing

Two-sided marketplace for beauty professionals and companies. Features include professional portfolios with tier system, company workspaces with role-based access, Stripe subscription tiers, two-way review system, and OAuth API provider via Doorkeeper for third-party integrations.

Ruby on RailsPostgreSQLTurboStripeDoorkeeperActiveAdmin
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Domain Registration & Management Platform

Upwork (Sep 2019 - Present)

E-commerceDNS managementDomain sniping

Complete domain management system with multi-TLD registration, bulk operations, DNS record management, domain sniping service, auto-renewal system, and full e-commerce with Stripe/PayPal integration. Includes admin panel for platform management.

Ruby on RailsMySQLPythonJavaScriptStripePayPal
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Payroll & HR Management System

Knit People, Canada (2016-2019)

Payroll processingHR featuresCompliance

Backend development for payroll processing, HR features, employee management, and tax calculations. Handled complex business logic for multi-region compliance and data processing at scale.

Ruby on RailsJavaScriptPostgreSQLREST API
📁

Business Directory Platform

Yoolk, Cambodia (2013-2016)

High-volume dataSearch optimizationReporting

Backend systems for comprehensive business directory with internal reporting, search optimization, and database performance tuning. Supported thousands of business listings with fast query responses.

Ruby on RailsPostgreSQLMySQLRedis

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