I designed and developed an iOS app, Coin Portrait AI (released in 2024), that uses trained ML models and shaders to create realistic coin images from photos, with better results than Midjourney or Photoshop. ML models and shaders have been adapted to run completely on a mobile device, without a server

Design and implementation of a Version Control system for playcanvas.com (owned by Snap Inc.). Playcanvas is an online platform for WebGL/JavaScript-based game development, provided as a service. The Version Control system supports fully independent branches and intelligent merging of playcanvas-specific data structures (deeply nested JSON). Merge is mostly automatic and guarantees consistency of the final result. The system uses AWS DynamoDB for storing the checkpoint graph and metadata, and AWS S3 for game assets.Design and implementation of prefabs/templates for playcanvas.com with override and nested prefab support.Design and implementation of playcanvas-sync, an open source utility for writing playcanvas code on local machines.

Profile and query classifiers (Python, Machine Learning, Natural Language Processing).Design and implementation of a system for large scale concurrent task processing (Kafka, C++, Ruby on Rails).A system for automated finding of family members among billions of person records (C++).

Domain name classifier and algorithms for ad keyword generation for the German market that outperformed local competition in a split-traffic monetization test

Determining similarity between users/clustering, 2 US Patents

Handling of symbolic values in checkers for memory buffer overruns in C and C++ source code