Kamil Owczarek

About

Kamil Owczarek

Kamil Owczarek

Senior Full-Stack Engineer

About Me

I'm a Senior Full-Stack Engineer with a track record of building high-traffic, multi-market platforms. I specialize in performance optimization, scalable architecture, and shipping production systems that handle real-world complexity.

What I Do

  • Build and scale multi-market e-commerce platforms serving users across 13 languages
  • Optimize system performance at every layer - from database queries to frontend bundles
  • Design architecture for high-traffic applications with Redis caching, PostgreSQL optimization, and efficient API design
  • Ship open-source tools that solve real developer problems

Production Results

  • -60% API response size through smart object mapping and payload optimization
  • 6x cache capacity via gzip compression on constrained infrastructure
  • +80% faster search with PostgreSQL CTE query optimization
  • -92% bundle size through lazy translation loading
  • -70% bandwidth costs by eliminating aggressive prefetch

Tech Stack

TypeScript, React, Next.js, Vue, Nuxt 3, Node.js, PostgreSQL, Redis, Prisma, Tailwind CSS, Turborepo, Vercel

Beyond Code

I work as a digital nomad, building from wherever I am. I run Juicify, an AI-powered fitness platform, and maintain several open-source projects. I write about performance engineering and architecture decisions on this blog.