Grafo
Agentic AI workflows on OpenAI and Anthropic, at 5,000+ parallel requests a minute.
Rails 7
Sidekiq
OpenAI API
Anthropic API
AWS
Ruby on Rails architect
I rebuild and scale Ruby on Rails systems, and add the AI layer.
23 years in software, 18 of them in Rails. I work as a long-term technical partner on one product, rather than as a fixer for a queue of small tasks.
By the numbers
- years in software
- 23years in software
- years in Rails
- 18years in Rails
- Upwork clients
- 43Upwork clients
- hours tracked
- 21,500+hours tracked
- Job Success
- 100%Job Success
- Expert-Vetted
- Top 1%Expert-Vetted
What I do
AI and LLM integration
Add a production AI feature, retrieval over your data, or model routing to a Rails app that already works.
5K parallel AI requests a minute
How it works →Rails upgrades and legacy rescue
5.x/6.x to 7.x/8.x, including codebases nobody wants to touch.
Rails 6.0 to 7.2 at 50K requests a day
How it works →Architecture and performance audit
A written review with a prioritised plan, when you need a straight answer about what is wrong.
an architecture review that became a three-year engagement
How it works →Selected work
Read the case study →
Zipchat
RAG over store data, search in the function-calling flow, and a faster admin dashboard.
Ruby on Rails
Shopify
ChatGPT API
Pinecone
Minute7
Rails 6.0 to 7.2, with the React front end, the AWS pipeline and two QuickBooks integrations.
Rails 7.2
React
AWS Elastic Beanstalk
QuickBooks API
Cerebral
A HIPAA EMR, prescription workflows and provider integrations at millions of patient records.
Ruby on Rails
React
HIPAA
AWS EC2
eLocker
An architecture review that became three years of building the team and the product.
Ruby on Rails
Project architecture
Code review
Team building
LeadPro
An email parsing engine for 10+ real estate portals, running since 2016.
Ruby on Rails
Sidekiq
Email parsing
Scraping
What clients say
Konstantin has been an invaluable leader to our team at GrafoAI. He possesses a remarkable depth of technical knowledge and expertise and has consistently delivered high-quality code. Konstantin has a remarkable ability to analyze and solve complex problems, often seeing them before they appear.
Konstantin worked for us for over 2 years and did an exceptional job in contributing to our Ruby on Rails codebase. He was always willing to dive in deep and was very committed to making our code base better. He has great expertise and would be more than happy to rehire him in the future!
Konstantin is an exceptional RoR Consultant/Dev who deserves high praise for his remarkable contributions to our team in really tough situations. His profound expertise in his guidance for designing complex software systems has been a driving force behind the successful implementation of several critical projects.
Start a conversation
Tell me what the app does, what is going wrong, and the Rails and Ruby versions. I reply with what I would do first.
Full overlap with European business hours, and 9am–6pm US Eastern.
43 clients, 21,500+ hours, 100% Job Success — the reviews are on Upwork.