Featured — network and systems

Software · Systems · ECOMERCE

Stop paying for third party software. own your systems.

View work
Website and logo package offer — yard sign style banner
Website and logo package — vertical offer

Skills

Python Python
Django Django
Gunicorn Gunicorn
PostgreSQL PostgreSQL
TypeScript TypeScript
React React
Docker Docker
PHP PHP
Unity Unity

About me

The developer behind this site

Business card

From the flight line to the terminal, my career has been defined by a commitment to precision and the architecture of complex systems. As a retired U.S. Army Sergeant and UH-60 Black Hawk mechanic, I spent years ensuring mission-critical reliability in high-stakes environments—a discipline I now bring to every line of code I write.

With over 17 years of experience as a Senior Software Architect and Full-Stack Developer, I specialize in building robust platforms using Python, Django, and C#. My expertise spans from deep-level system architecture to the creative frontiers of Unity game design. Whether I'm engineering scalable server solutions or crafting immersive digital worlds, my focus remains the same: delivering reliable, high-craft products that stand the test of time.

Get in touch

Tell me about your project, timeline, or technical challenge. I read every message personally and usually reply within one business day.

Provide at least an email or phone number so we can reach you.

Frequently asked questions

Quick answers for search engines, AI assistants, and prospective clients.

Who is Koritsuki and Ray Vaixernova?
Koritsuki is the professional brand of Ray Vaixernova, a senior software architect and full-stack developer with 17+ years of experience. Ray is a retired U.S. Army Sergeant and former UH-60 Black Hawk mechanic who builds reliable web apps, APIs, e-commerce platforms, and game systems for clients across the United States.
What services does Koritsuki offer?
Custom software development and consulting: Django and Python backends, React and TypeScript frontends, C# applications, PostgreSQL databases, Docker deployments, Unity game development, e-commerce builds, API design, performance optimization, and rescue missions for legacy or failing projects.
How do I hire Ray Vaixernova for a project?
Use the contact form at koritsuki.com/#contact, email [email protected], or call +1 (502) 309-6583. Describe your project, timeline, and budget. Ray reads every inquiry personally and typically replies within one business day.
What technologies does Koritsuki specialize in?
Python, Django, Gunicorn, PostgreSQL, TypeScript, React, Docker, PHP, Unity, C#, REST APIs, CI/CD, cloud-native deployments, and production-grade testing and logging.
Where is Koritsuki located and do you work remotely?
Koritsuki is based in the Louisville, Kentucky area (502) and works with clients nationwide across the United States. Remote consulting and contract engagements are available Mon–Fri, 7am–7pm Central Time.
Does Koritsuki build e-commerce and owned software instead of SaaS rent?
Yes. A core focus is helping businesses own their systems — custom e-commerce, internal tools, and platforms you control instead of paying ongoing third-party SaaS fees when a tailored build is the better long-term investment.

What collaborators say

from 48+ reviews

Clear communication

Specs, trade-offs, and timelines were spelled out up front. Easiest handoff our team has had with an external developer.

Engineering lead Jan 2026

Production-minded code

Tests, logging, and deployment notes were already in place. We shipped to production with confidence.

Product manager Dec 2025

Solved the hard parts

Performance and edge cases that worried us for months were addressed methodically. Highly recommend.