I build systems that survive exponential growth, handle ambiguity, and are resilient to human optimism.

-- KG.

Resume • Blog • Consulting • LinkedIn • GitHub • RubyGems • Talks • SlideShare

I’m a hands-on Staff / Principal-level software engineer and former CTO who builds reliable, scalable production systems.

My background spans distributed systems, PostgreSQL, Ruby/Rails, infrastructure, developer productivity, and, more recently, applied AI systems: retrieval pipelines, eval harnesses, production automation, and embedding-based services.

I like hard problems with real constraints:

• scaling transactional systems
• eliminating operational risk
• improving developer experience
• shipping AI features without turning the product into a probabilistic mess

• Build and scale large distributed backend systems with strong reliability and observability baked in
• Design production AI workflows around real business use cases
• Improve CI/CD, onboarding, deployment safety, developer productivity, and operational simplicity
• Comfortable in all levels of abstractions, from back-of-the-napkin architecture, to nitty-gritty code details.
• Turn messy systems into maintainable ones, and have successfully rewritten systems from scratch under two months.
• Practice 90%+ test coverage and will convince you to do the same.

• Applied AI engineering
• LLM product architecture
• Evaluation-driven development
• Retrieval and ranking systems, in particular Power Law distribution
• PostgreSQL performance, scalability, replication architecture, and security
• Ruby, Python, TypeScript, C/C++, BASH, Rust
• Distributed systems, with high availability, fault tolerance, and auto-healing architectures
• Developer tooling, automated onboarding, and build systems
• Gaming Algorithms, Mini-Max, Alpha Beta Pruning
• Networking Systems, CISCO routers, VLANs, etc.
• Hardware, ESP32, Arduino, Raspberry PI, and more.

A few projects that reflect the range of work I enjoy:

• gomoku-ansi-c
  ANSI-C-based game engine for 5-in-a-row (or Gomoku) that runs in a TTY terminal, and you can play using arrow keys.

  Or you can use the networked version running on Google Cloud Run, which offers a ReactJS frontend to the C99/HTTPD backend via JSON API. You can play the game here: app.gomoku.games

• simple-feed
  Redis-backed social feed architecture similar to Twitter, with O(1) feed read-time property

• colored2
  Terminal color support for Ruby

• sym
  Symmetric encryption via CLI and Ruby API

• puma-daemon
  Puma daemonization support

• cmake-project-template
  C++ / CMake starter project with sensible defaults

• bashmatic
  Bashmatic — 900+ DSL functions written in BASH for readable script feedback, terminal graphics, headers, and more.

You can also browse the full collection of public gems written in Ruby here:

• RubyGems profile

I write and speak about:

• PostgreSQL scaling
• Ruby and systems design
• developer productivity
• DevOps and release engineering
• applied AI systems

Some links:

• Conference Talks
• Tech Blog
• SlideShare

Originally from Kharkiv, Ukraine. Now based in the San Francisco Bay Area.

I graduated Suma Cum Laude from Monash University, majoring in pure mathematics and applied statistics, which permanently damaged my tolerance for fuzzy thinking.

• Agentica Group — parent company of my consulting one
• LinkedIn