Jakub Dajczak

Hello!

I'm Jakub, a fullstack developer from Gdańsk, Poland. I got a Bachelor's degree in Computer Science from Gdańsk University of Technology.

Currently, I'm working at DocHub with technologies like Ruby on Rails, Python, Vue and Ember, mostly on AI integrations and new features.

These days, I mostly use Mac and Linux for development, and Cursor and Claude Code when it comes to new AI tools.

Over the years as a developer, I've worked with several programming languages and frameworks, but I feel that in the age of LLMs this doesn't matter as much as understanding the ideas and planning your work properly.

I decided to build this website not out of necessity, but because I wanted to better organize my thoughts and projects (which I’ve created and abandoned more times than I can count) and maybe share them with others.

In my free time, I’m traveling the world, tinkering with small projects, learning new random things, building and setting up servers for my friends, playing video games and watching movies.

Work Experience

Fullstack Developer

2026 - Present

DocHub

Ruby on RailsPythonVueEmberRESTSidekiq

Fullstack Developer

2025 - 2026

Lipscore

  • Developing and maintaining a Ruby on Rails monolith with Sidekiq and embedded JavaScript widgets
  • Database query optimization and performance improvements
  • Building comprehensive API documentation using OpenAPI
  • Improving AI moderation pipeline using latest LLMs
  • Modernizing client-facing integration and widget stack
Ruby on RailsJavaScriptRESTOpenAPISidekiq

Fullstack Developer

2022 - 2025

Qtravel.ai

  • Lead developer of GraphQL API based on Ruby on Rails
  • Building and optimization of complex Solr queries
  • Research and integration of NLP tools for query analysis
  • Development of comprehensive unit and end-to-end tests
  • Creation and maintenance of technical documentation
Ruby on RailsGraphQLApache SolrNLPPythonDocker