
Zachary Donhauser
Full Stack Software Engineer
Full stack software engineer with a proven track record of delivering and maintaining production systems that power live businesses. Proficient in React, Node.js, Express, and PostgreSQL, with a focus on usability, performance, and continuous iteration. Designed and built a fully integrated POS and operations platform for a multi-department amusement park, supporting daily ticketing, event and party booking, food service, memberships, and employee time tracking. I take a user-centered approach to development, blending technical expertise with functional design, and bring cross-functional leadership experience that equips me for roles requiring both engineering excellence and strategic collaboration.
FEATURED PROJECTS
Kitchen Display System
Real-time KDS with synchronized front-of-house and back-of-house order lifecycle management using webhooks. Streamlines food service operations with live order tracking.

Employee Time Tracking
Employee clock-in terminal and time tracking tools with administrative controls for industry-specific hours handling and live time-clock monitoring.

Membership Management
Comprehensive membership access management system with recurring billing options via Shopify integration. Handles member check-ins and subscription management.

Mobile Party Booking PWA
Progressive Web App for mobile party and group booking with remote availability access. Streamlines the booking process for special events and group visits.
Mobile PWA