the-worst.dev

Hello, I'm

Patryk
Roguszewski.

Software Engineer

Coding since 2006. I build products around real business needs — pragmatic, fast, without cutting the corners that matter. Technology is a means; shipping quality is the goal.

More about me
Patryk Roguszewski

The problem always comes before the stack. Deep domain understanding, tight feedback loops, frequent releases — that's what makes software worth shipping. The stack follows the problem, not the other way around. My goal is always the same: ship quality fast — without skipping what actually matters.

Led teams building products used by millions. Currently focused on bringing LLMs into real production workflows.

Off-screen: dad, gym, keto, trading, sci-fi, games, swimming & cycling.

What I work with

Backend
C# / .NET · Microservices · Modular monolith · Performance engineering · Node.js
AI Engineering
LLMs (OpenAI, Claude, Perplexity) · Semantic Kernel · OpenAI Agents SDK · Claude Code · Promptfoo evals · Langfuse
Frontend
Angular · Flutter · Nuxt
DevOps & Cloud
Azure · Docker · Kubernetes · CI/CD · Infrastructure as code
Data
SQL Server · PostgreSQL · PostHog · Data-driven product decisions
Product mindset
Technology is a means, not an end — quality and delivery speed over gold-plating. Deep domain knowledge, close work with business stakeholders.

Recent posts

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