Anton Fedoruk

Hi! I'm an Engineering Lead at kay.ai, building pragmatic systems and doing applied AI research.

Previously, I was a founder at Array AI, working on learning algorithms inspired by the human brain 🧠. Earlier, I founded WarSpark Studios and Blaster Studio, shipped mobile games reaching 7M+ players, and was featured by the App Store (Game of the Day in the U.S.).

Research

ROIBench

Autonomous agents iterate against three metrics (Activation ROI, Payoff, Retention Signal) until the app delivers real, measured value. Loss functions for products.

In progressroibench.com

Guaranteed Long-List Extraction via Item-Count Adaptive Chunking

Five-stage pipeline avoiding truncation via adaptive chunking. 100% recall on FCC Invoices and 10,000-claim synthetic tables.

In preparation

LongListBench: A Benchmark for Long-List Entity Extraction Under Layout and OCR Noise

Anton Fedoruk, Serhii Shchoholiev, Akhil Mehta

80-document benchmark for long-list extraction from semi-structured PDFs. Includes ground-truth JSON, OCR transcripts, and 7 failure modes.

Internal reviewPDF GitHub

Story

AI has been my childhood dream. In 2020 I committed to it full-time after years of building game studios as a way to learn, ship, and fund long-term research.

I started with visual understanding and kept returning to a hypothesis: saccade-like attention is key for making vision systems efficient and human-like.

During COVID, I was doing AI research for my startup Array AI in Kyiv. When the war in Ukraine started, everything changed quickly. In the following year, I joined kay.ai as a contractor and was soon invited to the U.S. to become the startup's first official employee.

Outside of work, I like running and pair-vibe-coding with my son.