Senior Software Engineer Kraków, Poland
Reliable software, from database to interface.
I’m Ivan Bondarenko, a product engineer with 12+ years of experience. I turn complex product problems into maintainable Ruby on Rails and React systems.
Toolkit
A pragmatic stack for products that need to last.
Product thinking first, proven tools second. I work across the full path from data modeling and APIs to accessible interfaces and production delivery.
- Ruby on Rails
- React
- TypeScript
- Node.js
- Python
- PostgreSQL
- Redis
- RabbitMQ
- GraphQL
- Elasticsearch
- AWS
- Docker
- Claude Code
- Codex
Latest writing
Notes from the workbench.
- Claude Opus 5, T3 Connect, Conductor Cloud, and More: Dev News WeeklyClaude Opus 5, T3 Connect, Conductor Cloud, Rails CVE-2026-66066, Kimi K3, GPT-5.6 pricing, and SuperGrok's $30 three-month offer.
- Latest AI Technology Highlights: July 2026The latest AI technology highlights for July 2026: agentic models, real-time voice, multimodal media, local AI, and the safety lessons developers should know.
- What Is Python, Really?Understand the difference between Python the language, CPython the implementation, and the runtime and standard library that execute Python programs.