I’m Kert, a software engineer based in Tallinn, Estonia, with over a decade of experience building data-intensive systems. My work centres on event-driven architecture, streaming data pipelines and, more recently, running LLM-based agents in production.

I’ve spent most of my career on the backend of SaaS products, from a mobile payments platform to CRM integrations and the streaming infrastructure behind them, as an individual contributor, as a team lead and, for a while, as a head of engineering. That mix shaped what interests me: the hard part of software is rarely writing it, but keeping it correct, understandable and fast as the system and the team around it grow.

In this blog, I write down the challenges and discoveries I’ve met on the path to building maintainable and scalable software.

You can find me on LinkedIn, GitHub, Twitter, or by email at kert@pjatk.in.