Bill Eisenhauer

• 321 GitHub contributions across 100+ repositories in the past year
• Built production SaaS applications, an MCP server with 26 tools, cross-platform publishing pipelines, and AI agent frameworks
• Codified a repeatable AI-assisted development workflow: plan → implement (TDD) → review → demo → ship
• Developed judgment about where AI accelerates, where it misleads, and where human oversight remains critical

• Owned the event and messaging platform serving the entire engineering organization — 7 reports including Staff Engineers and Engineering Managers
• Led migration from legacy event tracking to RudderStack — stood up the instance, managed the vendor relationship, and architected the transition from third-party cookies to Conversion APIs (~$3M projected annual savings)
• Progressed an IaC-based metadata layer for event tracking with the staff engineer, moving discoverability from Slack debugging to a structured registry
• Diagnosed a persistent incident problem as cultural, proved it with data, and built automation to enforce postmortem accountability over real pushback
• Created a natural-language event analytics prototype through Claude.ai conversations — visualizing the future of event data before the organization was asking for it

• Helped scale the technology organization from 20 to 200+ engineers; influenced org design at Director scope
• Grew and promoted eleven remote engineers, several receiving multiple promotions through structured coaching
• Led redesign of the stylist workflow around algorithm-generated picks, reducing time-per-Fix and improving unit economics
• Conducted 100+ technical and cultural interviews, emphasizing product mindset and growth potential over credential matching

• Created the Smart Fix Assignment Service — a cross-platform, real-time integration with the data science platform that became the template for embedding algorithmic intelligence into products
• Established a data science plugin point that let algorithms iterate with minimal engineering friction, contributing to historic keep rate and AOV improvements leading into the 2017 IPO
• Ground-floor engineering in a product-focused, data-driven environment that hired engineers for product taste

Rebuilt team and culture after acquisition-driven attrition. Progressed from architect to development manager. Directly led development of a feature on a compressed timeline to preserve $1MM in revenue. Designed a Ruby-based data export application for 700+ tables that became a revenue-generating add-on.

Full-stack Ruby on Rails backend and JavaScript frontend for TripCase mobile travel app. Built and maintained the web services API consumed by iPhone, BlackBerry, and Android clients. Led the Android client rewrite using Backbone.js and PhoneGap — one of the first substantive HTML5 apps released on a mobile device. TripCase ran until April 2025; code I wrote in 2010 was still in production 13 years after I left.

First engineer. Inherited an outsourced application and grew the team from one developer to three practicing Agile, delivering v2 of the product. Full responsibility for the SaaS platform (Ruby on Rails / MySQL).

Independent consulting including a 10-month telecommuting contract with Google building RESTful web services and infrastructure tooling in Ruby on Rails with TDD. Additional client work for GetARoom (Hotels.com founders), Stylepath, and agency projects.

Five years architecting Java-based systems. Led the first Spring Framework deployment in the company — a federation of 20+ web applications replacing legacy architecture. Deployed Nokia’s first Ruby on Rails application. Designed the consumer database service eliminating customer data fragmentation across the corporation.