// author

Konstantin Gredeskoul

Engineering leader and open-source author with 25+ years across distributed systems, scalability, and developer tooling — now focused on applied AI and AI-first engineering.

I've spent my career making applications fast, resilient, and pleasant to operate — from scaling Wanelo on PostgreSQL to billions of rows, to writing open-source tools used millions of times over. These days I help teams integrate large language models, vector databases, and intelligent automation into production systems through ReinventONE.

// posts

Evals To the Rescue

Evals: The Unit Tests for the Non-Deterministic Parts of Your App

2026.06.22
devops

Evaluating Terraform for DevOps Engineers

2024.12.05
consumer-electronics

Ultra-Fast External SSD Drives: Samsung X5 vs SanDisk Extreme Pro V2

2021.06.01
programming

Yes! It's 2021, and Ruby 3.0, and Ruby on Rails 6.1 are alive and thriving. Are you?

2021.01.23
programming

Turbo Agile™: Optimizing Efficiency of the Engineering Process for Maximum Velocity.

2020.09.10
programming

How to Write Awesome CLI tools in Ruby and test them with RSpec and Aruba

2020.09.06
programming

Test your Understanding of Ruby Concurrency

2020.05.31
programming

Building IntelliJ Bazel Plugin from Sources

2020.03.20
programming

C++ Newbie Tour: Getting Started with C++ on Mac OSX

2018.09.19
devops

C5 class instance on EC2: cannot create file: Read-only file system

2018.05.14
programming

Dead Simple Encryption with Sym

2017.03.09
programming

Add a Social Activity Feed for your Site in Minutes with the simple-feed Ruby Gem

2017.02.18
programming

Building Scalable Performant And Cheap Distributed Applications Part 1

2016.05.05
programming

Mixmax And My First Nodejs App.

2016.04.06
programming

Scaling Web Applications On Postgresql A Walkthrough Presentation

2015.11.27
programming

Serial Console Hacks With Arduino

2015.11.21
programming

How To Use Arduino Nano Mini Pro With CH340G On Mac Osx Yosemite

2014.12.30
programming

Announcing Laser Cutter and MakeABox.IO

2014.11.20
programming

BORAT: Bathroom Occupancy Remote Awareness Technology with Arduino

2014.10.11
programming

Arduino IDE Alternatives

2014.08.01
programming

BackSeat Driver: Autonomous Vehicle Library for Arduino

2014.07.17
programming

Twelve Step Program For Scaling Web Applications On PostgreSQL

2014.03.20
programming

Detangling Business Logic in Rails Apps with PORO Events and Observers

2013.08.04
programming

How to configure PostgreSQL for very high read/write throughput

2013.02.12
programming

The Case For Vertical Sharding

2013.02.04
programming

The Big Switch How We Rebuilt Wanelo From Scratch And Lived To Tell About It

2012.09.13