REGISTER
Krystian Kościelniak
Krystian Kościelniak
Software Developer

A husband and a father of one. Passionate about developing software for modern environments. Spends way too many on vinyl music since he fixed the dead Unitra G 8010 record player. Likes caps.

technologies

I provide expertise in

Backend

  • Express
  • Node.js

Frontend

  • React
  • Redux
  • (S)CSS
  • styled-components
  • React Native Web

Mobile

  • React Native

Other

  • ESLint
  • Webpack
  • Unit testing (Jest)
  • E2E testing (Cypress.io)
  • Git
  • Electron

contributions

Hire React Native Experts
for your new project

I hereby agree for sending me by Callstack.io Sp. z o.o. with seat in Wrocław, by means of electronic communication to the e-mail address indicated by me, commercial information, within the meaning of the Act of 18 July 2002 on the provision of electronic services. For details see our Privacy Policy.