Erick Katzenstein

I was the lead engineer and lead designer for Hi-BB, a personalized beauty shopper. Find the best product for you in under three minutes.

• Generative LLM (OpenAI)
• Live chat and survey
• Custom semantic search (embeddings)
• Custom decision tree classifier
• Custom taxonomic product classifier
• Retrieval augmentation generation (RAG) pipeline
• Checkouts with CC, Google Pay, and Apple Pay (Stripe)
• Data collection pipeline (publicly available data, mainly with Puppeteer)
• Push and real-time endpoints (Supabase)
• Authentication via phone/text OTP (Twilio)
• Order management, supply chain, customer emails (Resend, SMTP, Stripe)
• Full feature progress web app
• Monitoring, event tagging, and observability
• Training data for reinforcement learning with human feedback (RLHF, under development)
• Automated testing (E2E)
• Admin interface with server-side components

Atlist is a tool for making map-based lists of your favorite locations to share with friends. You can make your own map manually or with a little help from AI.

This was a personal passion project. Sharing recommendations for friends visiting my city isn't easy, so it's still a work in progress.

A custom chatbot (OpenAI GPT-4 API) to make your Spotify playlist. The website speaks for itself. This was an entirely solo full-stack project, including ideation, back-end engineering, prompt engineering, design, and front-end engineering.

A one-page prototype of Arena's core product Analyze view. The dashboard is a control/treatment comparison of machine learning (ML) campaigns deployed to Arena's clients. This link is a limited view of the full feature set.

The design challenge was to make this dashboard agnostic to the industry and surface specific and custom KPIs for different clients. The responsive design enables users to "opt-in" to a given metric for further study.

The technical challenge was to surface aggregated metrics and drill-down data. For optimal performance, the top-level aggregations were rendered with D3 and SVG, while the drill-down metrics were rendered with WebGL.

The back end is powered by an LDAP database (Snowflake) coupled with PostgreSQL for app-specific storage.

Role: designer and tech lead of a team of six.

A demo of Enigma's company graph product, a tool to navigate and analyze the complex relationships between small and medium businesses (SMBs).

I was the tech, design, and product lead on this project.

Engaged in software engineering for an interactive 3D scene designed for architectural zoning and massing models, with key accomplishments including:

• Implementation of three custom line weights for architectural rendering.
• Development of animated transitions across different design scenarios.
• Integration of ambient occlusion and tone mapping, ensuring optimal performance.
• Conversion of tilemap to GeoJSON format.
• Creation of custom generative modeling solutions.

Fitd.com provides clients with the opportunity to design and order custom cupboards within a 3D interface.

I worked on the development of WebGL, the back and front end, and the design (solo project). This comprehensive site was built in collaboration with a startup based out of London, UK.

Technology stack: Node.js, React, WebGL, Three.js, Stripe, Acuity, SendGrid

GoConfigure is a helpful estimating tool that provides you with a layout based on the size of your project area for interior or exterior spaces.

This project is developed using Three.js and React, offering estimates for configuring indoor bike racks. Its key features include:
• Bike count and sizing optimization
• PDF export of specs and floor plan, dynamically updated with user configurations
• Complex design schema and storage configuration
• Complex 3D scene with hundreds of rendered bicycle proxies

GetMyVaccine.org was a volunteer-driven project to help people find COVID-19 vaccine appointments and prevent slot waste at pharmacies. The site deployed an army of scraping bots to aggregate national availability data (USA) and display results in a common interface. GetMyVaccine.org welcomed more than 600,000 unique users in four months.

An npm module for animated expressions using SVG. It was built for an AI-powered sentiment-analysis chat room using the Watson Tone Analyzer API.

This package's initial conception was for the React Riot Hackathon 2017—where our team took home the Innovation Award.