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I build production
AI systems.

Jonathan Kumin — Senior Engineer, AI Platforms at Signature Aviation — building production AI systems. Previously AI Engineer at JOANN Stores, after a decade leading SEO and marketing engineering across retail and e-commerce. I work end to end, from in-house models to the tools and platforms around them — including NextOS, a full operating system I built to run in a browser tab.

See my workExplore NextOSor boot it
years shipping software
10+
apps in NextOS, built solo
44
model providers integrated
5
web OS, in a browser tab
1

01Selected work

Shipped systems,
not slideware.

A few projects spanning AI content systems, SEO tooling, and production ML infrastructure.

01 · 2024

CreAIt: AI-Powered Content & SEO Platform

Jonathan's newest venture, CreAIt, leverages AI and Marketing Data Warehouses to automate content strategy and creation. It analyzes competitor content, identifies gaps, and generates SEO-optimized content. The platform features advanced RAG integration and custom fine-tuned models for Enterprise clients, delivering consistent, high-quality content at scale.

PythonTensorFlowRAGReactNext.jsMarketing Data WarehousesPostgreSQLRedis
creait.ai
95%
Content Efficiency
90%
SEO Performance
92%
Client Satisfaction
85%
Time Saved

02 · 2020

GPT-3 Powered SEO Tools for Giant Vapes

Pioneering implementation of GPT-3 powered SEO tools during its closed beta phase, specifically designed to leverage BERT's natural language understanding capabilities. The system automatically generates and optimizes product descriptions, category pages, and technical content, resulting in significant organic traffic improvements.

PythonGPT-3BERTFastAPIRedisPostgreSQLElasticsearchDocker
giantvapes.com
85%
Search Visibility Boost
92%
Organic Traffic Increase
95%
Content Generation Speed
88%
Conversion Rate Improvement

03 · 2024

AI Architecture at JOANN Stores

As AI Architect at JOANN Stores, pioneered the implementation of cutting-edge AI solutions including Mamba and Liquid Neural Networks for efficient, lightweight inference. Developed systems for inventory optimization, customer behavior analysis, and personalized recommendations.

PythonMambaLiquid Neural NetworksPyTorchKubernetesAWSMLflowApache Kafka
joann.com
96%
Inference Speed
94%
Model Accuracy
98%
System Reliability
92%
Resource Efficiency

Figures are Jonathan’s own reported results, rendered verbatim from the same data module the MCP server exposes.

02The road here

A decade of search,
then the models caught up.

Over a decade across SEO, marketing, and now AI engineering. The through-line: shipping GPT-3 tools in its closed beta, building in-house models at a Fortune-scale retailer, and now AI platforms for aviation.

FrontendNext.js · ReactJS · Javascript
BackendPython · FastAPI · Flask
DataMongoDB · PostgreSQL · Firebase
AI / MLLLM Fine-Tuning · Dataset Preparation · Synthetic Data

education

Wittenberg University

BA & BS — Computer Science and Classical Guitar Performance

  1. Jan 2026 - Present

    now

    Senior Engineer, AI Platforms · Signature Aviation

    Building AI platforms at Signature Aviation, the world’s largest network of private aviation terminals.

  2. Jun 2023 - May 2025

    AI Engineer · JOANN Stores

    Promoted to a newly created role to design and implement AI solutions across the organization. Led the development of cutting-edge, in-house AI models using innovative architectures like Mamba/LNN for efficient inference, until JOANN wound down operations in May 2025.

    • AI Engineer — Jan 2024 – May 2025
    • SEO & Search Specialist — Jun 2023 – Jan 2024

  3. Aug 2022 - Apr 2023

    SEO Team Lead · Searchbloom

    Led a team of SEO specialists, driving organic growth for clients. Implemented AI-powered content creation processes that significantly increased content output and efficiency.

  4. Sep 2021 - May 2022

    Search Engine Optimization Marketing Manager · Rocket Central

    Managed SEO strategy and execution for Rocket Central, the central hub of Rocket Companies. Implemented innovative AI techniques but was limited in pursuing a full-time engineering role.

  5. Sep 2019 - Sep 2021

    Director of SEO · Giant X (Giant Vapes / AVAIL)

    Led SEO for Giant X, developing and deploying GPT-3 powered SEO tools during GPT-3’s closed beta. These tools resulted in a 20% overnight boost in search visibility after Google’s BERT update.

    • SEO Manager — Apr 2020 – Sep 2020
    • Store Manager — Sep 2019 – Apr 2020

  6. Jan 2018 - Present

    ongoing

    Owner · Kumin Consulting, LLC

    Founded and managed Kumin Consulting, providing SEO, digital marketing, traditional marketing, and application development services. Worked independently full-time here between JOANN’s closure (May 2025) and joining Signature Aviation (Jan 2026).

  7. May 2017 - Jan 2019

    Chief Marketing Officer · Star Products Corporation

    Oversaw all marketing efforts, including SEO, social media, email marketing, and web development. Implemented early AI techniques for SEO content optimization.

    • SEM Manager & Web Developer — Oct 2017 – Feb 2018
    • Sales Representative — May 2017 – Oct 2017

  8. Jun 2013 - Present

    ongoing

    Web Application Developer · Kumin Web Design

    Freelance web developer, creating websites and mobile applications for a diverse client base. Skills include front-end development, UI/UX design, and SEO.

03The flagship

NextOS
a computer in a browser tab.

The project I’m proudest of: a full operating system that runs in a browser tab, built solo, end to end. It is the résumé you can boot, and it is also just a genuinely useful machine.

  • A Unix-style filesystem and a real Terminal with CPython, Node.js and more
  • 44 built-in apps, plus a VS Code workbench that runs real extensions
  • AI agents that operate any app through hundreds of tools, under your approval
  • Syncs to your own Google Drive; installs as a PWA; runs offline
Learn more about NextOSBoot it
field.shell — next.os
NextOS: the Field shell with several apps open at once

04Take it with you

The portfolio doesn’t
end at the tab.

model context protocol

Query me from your editor

A real MCP server speaks for this site. Add it to Claude Code, Claude Desktop, or Cursor and ask your own AI about the work — seven read-only tools over the same canonical data this page renders.

shell
claude mcp add --transport http portfolio https://jonkum.in/api/mcp
MCP docs

The one-pager

A print-perfect resume built from the same data module as everything else here. One page at default scale, honest URLs, save as PDF from your browser.

Open the resume

How it was built

Architecture, counted-not-estimated numbers, security posture, and the engineering war stories — including what this site deliberately is not.

Read the colophon

05Get in touch

Got a project in mind?

I'm always up for talking about AI systems, SEO, or the next thing to build.

Emailjkumin@seoptimization.orgGitHubgithub.com/kumin-consultingLinkedInlinkedin.com/in/jonathan-kumin