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Serhii Kalyna

Full-stack developer with 18+ years of experience. Writing about AI tools, Claude API, MCP, and automation for developers at kalyna.pro

Location Kyiv, Ukraine Joined Joined on  Personal website https://kalyna.pro/

Education

Nikopol, Ukraine

Pronouns

he/him

Work

Team Lead | AI driven developer

Vector Databases Comparison: Pinecone vs Chroma vs Weaviate (2026)

Vector Databases Comparison: Pinecone vs Chroma vs Weaviate (2026)

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3 min read

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Building a Telegram Bot with Claude API (Python, 2026)

Building a Telegram Bot with Claude API (Python, 2026)

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2 min read
RAG vs Fine-Tuning: When to Use Which (Developer's Guide)

RAG vs Fine-Tuning: When to Use Which (Developer's Guide)

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3 min read
n8n + Claude API: Complete Automation Guide (2026)

n8n + Claude API: Complete Automation Guide (2026)

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2 min read
LangChain for Beginners: Complete Guide (2026)

LangChain for Beginners: Complete Guide (2026)

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2 min read
How to Use Claude API with Node.js (Complete Guide, 2026)

How to Use Claude API with Node.js (Complete Guide, 2026)

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3 min read
How to Configure Cloudflare for WordPress: Caching & Security Headers

How to Configure Cloudflare for WordPress: Caching & Security Headers

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3 min read
How to Build an AI Agent with Python: Step-by-Step Tutorial (2026)

How to Build an AI Agent with Python: Step-by-Step Tutorial (2026)

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5 min read
Prompt Engineering Guide for Developers: Best Practices & Techniques (2026)

Prompt Engineering Guide for Developers: Best Practices & Techniques (2026)

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5 min read
RAG Tutorial with Python: Build a Retrieval-Augmented Generation System

RAG Tutorial with Python: Build a Retrieval-Augmented Generation System

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4 min read
How to Build an MCP Server with Claude: Complete Tutorial (2026)

How to Build an MCP Server with Claude: Complete Tutorial (2026)

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7 min read
Claude API Pricing Explained: What Does It Really Cost in 2025?

Claude API Pricing Explained: What Does It Really Cost in 2025?

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3 min read
How to Use Claude API with Python: Complete Beginner's Guide (2026)

How to Use Claude API with Python: Complete Beginner's Guide (2026)

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3 min read
What is Model Context Protocol (MCP)? A Developer’s Guide

What is Model Context Protocol (MCP)? A Developer’s Guide

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3 min read
How to Update Immich in Docker: Step-by-Step Guide (2026)

How to Update Immich in Docker: Step-by-Step Guide (2026)

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2 min read
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