iOS App development
January 29, 2021 - February 13, 2021
Very Responsive
Poland
Skills
Full stack developer
I'm John Kowalski, a full stack developer with nearly 9 years of experience. Programming language expert with a track record of mentoring junior developers. I've been assessing needs, designing projects, developing them, and putting them into action. For over a decade, I've worked with IT firms, assisting in the development of technology-based enterprises from the bottom up. Enhanced the efficiency, data quality, scope, operability, and flexibility of applications. As needed, I managed, optimized, and upgraded PHP databases. My key skills are: React.js, Node.js, JavaScript, AngularJS, Cascading Style Sheets (CSS), jQuery, Git, MongoDB, HTML5, Bootstrap, Express.js, MySQL, Amazon Web Services (AWS), Web Development, HTML, Redux.js, PostgreSQL, GitHub.
Reviews
iOS App development
January 29, 2021 - February 13, 2021
Very Responsive
Graphic Designer Needed for Hubspot Email/Landing Page Templates
February 1, 2021 - February 11, 2021
John was flexible and quickly turned around multiple projects.
Wordpress Developer/Elementor
March 5, 2021 - March 20, 2021
Fantastic to work with. Always available. Highly recommend!
Node.js Expert
April 15, 2021 - April 23, 2021
John is talented and committed individual. would be looking forward to hire him again.
Flutter app project
May 4, 2021 - May 19, 2021
John is an excellent developer and is fluent in flutter and many other mobile app environments. He understood the project completely, followed all instructions and even gave some better ideas that we used to improve things further. He is an excellent person to have on any team. Will definitely hire again!
Blockchain developer
May 20, 2021 - May 31, 2021
Great team, amazing experience.
DeFi Trading Back-End Developer
June 2, 2021 - June 16, 2021
Great work, thank you John.
Meteor developer for e commerce site
July 7, 2021 - July 15, 2021
Would highly recommend his services and would like to work with him again in the future.
Need to create multiplayer VR based game in Unity
July 15, 2021 - July 27, 2021
He is really professional and understood exactly what i was looking for. I didn't have to explain much and got what i was looking for right on time.
Unity Game Developer needed for fixing issues and adding new levels
August 2, 2021 - August 9, 2021
John is a good worker in unity game development.
Build Mobile App With Flutter/Laravel
August 27, 2021 - September 6, 2021
John is fantastic to work with. He's smart, professional and always pleasant. Feel so fortunate to have been able to work with him to build our App. Great communicator, very thorough and delivered on time. Highly recommended! I very much appreciate the work that John has been doing for us, and would recommend him to anyone needing mobile app and website development.
Build Mobile App With Flutter/Laravel
August 27, 2021 - September 6, 2021
John is fantastic to work with. He's smart, professional and always pleasant. Feel so fortunate to have been able to work with him to build our App. Great communicator, very thorough and delivered on time. Highly recommended! I very much appreciate the work that John has been doing for us, and would recommend him to anyone needing mobile app and website development.
iOS Expert Developer
September 6, 2021 - September 22, 2021
Absolutely the best!
Shopify Web Developer
September 30, 2021 - October 14, 2021
Just a short note to tell you how much I’m enjoying working with John on several Shopify stores. He has been an extraordinary and valuable resource on our e-Commerce websites, creating a beautiful design that is light years ahead of my pathetic initial attempt. Initially, I tried using readymade themes but they had some limitations, then John came in and he is really a creative designer and Shopify Expert. He coded in liquid files, built a custom theme, and added custom Features by building a custom app that saved our money. He also offers great suggestions to improve our Conversion rate and yes it worked. Despite overseas, he is very prompt in his communication. I strongly recommend John services !
Unreal engine 4 developer
October 18, 2021 - October 28, 2021
Fast and efficient. Would and will hire again. A job well done.
Need help integrating Google Analytics with Shopify store so we can do re-marketing.
November 30, 2021 - December 9, 2021
Very smart, communicative, no fake hours.