Hi, I'm Dawid Ryłko

I design system architecture and own its security. Over ten years in IT. The work spans the whole stack: frontend interfaces, backend services, infrastructure automation, AI integration, and cybersecurity.

I weigh technical decisions against business goals and the cost of running a system for years.

My blog is in Polish, and it follows whatever I wanted to understand properly at the time. Career and background are on the about page.

What I do

• System architectureDesigning platform modules and setting technical direction. The hard part is what a system costs to keep running, not what it costs to build.
• CybersecurityThreat modelling, security reviews, and hardening, done while the design is still on the table.
• Full-stack engineeringTypeScript on both ends. React and Angular frontends, Node.js services behind them, cross-platform mobile apps on both stores.
• Infrastructure and deliveryCI/CD and cloud infrastructure, plus the production environments and monitoring that come after the release.
• AI agents and automationLLMs, MCP, and multi-agent workflows put to work on real engineering tasks.
• Engineering leadershipLeading a team, owning a product, and setting the standards other teams build against.

Interested in working together? Get in touch. Email is the fastest route.