AI agents
Building agents that work through tasks step by step on their own: splitting roles across subagents and setting up reusable skills.
Certificates:
- Introduction to subagents
- Introduction to agent skills
Anthropic Academy
About me
I'm Oleg Leonenko, an AI engineer. I build digital products with AI agents – SaaS applications and websites. In this blog I record what I observe along the way: what works, what doesn't, and why.
How I work
I plan a task, an agent carries it out, and it only counts as done when there is proof: a test, a screenshot, a working page.
That is how Fixik, a platform for small everyday help, is being built right now. This website was built the same way.
What I write about here
Two things: what working with AI agents really looks like day to day, and how Fixik is taking shape step by step. I write from my own experience – with a date, with sources, and also when something didn't work.
Hard skills
- Building digital products: SaaS applications and websites
- Working with AI assistants and coding agents (Claude, Claude Code): planning tasks, verifying results
- Next.js, Supabase and Vercel – the stack behind Fixik
- Astro – the framework behind this website
Certificates
19 certificates earned in 2026: 17 from Anthropic Academy and 2 from Make Academy. Here is what they stand for.
Automation with Make
Automating workflows between services and using AI steps inside them – from the basics to a custom agent.
Certificates:
- AI Automation Explorer (Foundation Track)
- AI Agent Builder (Advanced Builder Track)
Make Academy
Development with Claude Code
Building software with a coding agent: setting clear tasks, letting the agent work, verifying the result.
Certificates:
- Claude Code 101
- Claude Code in Action
Anthropic Academy
Claude API and MCP
Integrating Claude into applications through the API and connecting it to tools and data through the Model Context Protocol.
Certificates:
- Claude Platform 101
- Building with the Claude API
- Introduction to Model Context Protocol (MCP)
- Model Context Protocol: Advanced Topics
Anthropic Academy
Claude in the cloud
Running Claude through Amazon Bedrock and Google Cloud.
Certificates:
- Claude with Amazon Bedrock
- Claude on Google Cloud
Anthropic Academy
AI fluency
Working with AI safely and sensibly – and showing others how to do it.
Certificates:
- Claude 101
- Introduction to Claude Cowork
- AI Fluency: Framework & Foundations
- AI Fluency for educators
- AI Fluency for students
- AI Fluency for nonprofits
- Teaching AI Fluency
Anthropic Academy
Write to me
Questions, ideas or a project? Send me an email.