Henri Koller - Hire at Ithire

Henri Koller


  • Hourly Rate$27-30 / Hr
  • Total Earned$36389
  • Experience8 Years


  • HTML5
  • CSS3
  • JavaScript
  • jQuery
  • Ajax
  • Bootstrap
  • Foundation
  • UI / UX
  • React js
  • React Native
  • Node js
  • Wordpress
  • PHP
  • MySql
  • Magento
  • Opencart
  • Shopify
  • Woocommerce
  • Laravel
  • Codeigniter
  • Object-oriented Programming (OOP)
  • SEO
  • SVG
  • C++
  • C#
  • Java
  • Python
  • Ruby
  • Jade
  • Web Developers
  • Software Developers
  • Software Engineer
  • Front-end developer
  • Back-end developer
  • .NET developer
  • Game Developer
  • 3D Animator
  • Motion Graphics Designer
  • Mobile Developer
  • Designer
  • Mendix Developer
  • QA

Full stack developer

I am a Full Stack developer with 8 years of experience. I have wrote numerous unit and API tests. I have developed web design solutions and applications for clients winning past and current employers six-figure contracts. Resolved critical bugs to improve performance and user experience. Designed and deployed database technology to the website. I have integrated front-end user interface with API. I have optimized websites for devices like mobiles and tablets. Let me mention that I have insured the responsiveness of the websites. Implemented enhancements that improved web functionality and responsiveness. I have designed and maintained both corporate and client websites, using scripting languages and content management systems including WordPress. Designed and executed security measures such as firewalls and encryption. I have introduced new security measures in SQL databases, reducing the risk of data theft. Created expert technical design documents to speed up development processes I have advanced proficiencies in HTML, CSS, JavaScript, PHP, Ruby, JSON, JAVA, Python, C#,C++, Perl, Scala, Vue.JS, TYpeScript, Jquery, React excellent customer service skills and am familiar with SQL.I also have a solid foundation in MongoDB, Express, AngularJS, and Node.JS, Spring, Ruby, MariadB, Laravel, Django, React, Thank you for your time and consideration. Please let me know if there is anything further you need from me.


Metaverse / VR product ideas for voice ai

January 4, 2021 - January 21, 2021

102 Hours | $20 / hr

We did a brief call with Henri and I got many insights from our brief interactions. Would recommend him for VR / Unity projects.

CAD Designer / Engineer Needed To Redesign Wooden Gameboard To Be Manufactured in China Using CNC

January 28, 2021 - February 12, 2021

99 Hours | $21 / hr

I am satisfied with Henri's work and I'm going to use his knowledges and skills in the futur.

Need an experienced website developer to update new site

February 21, 2021 - March 13, 2021

117 Hours | $22 / hr

It was a pleasure working with Henri. He had a deep understanding of what work was needed and performed above and beyond expectations. Im looking forward to work with him again.

OSTicket Conversion and Migration

March 22, 2021 - April 2, 2021

79 Hours | $21 / hr

Henri worked tirelessly on our project. He went beyond the call of duty to make sure that everything was just the way we wanted it. He even ventured outside his area of expertise to meet our requirements. I hope to start another project soon with Henri, as I know he will make sure the job is done.

Factoring/Invoice Financing desktop platform

April 11, 2021 - May 5, 2021

123 Hours | $20 / hr

Henri did an excellent job, he fully understand the requirements set and always give his best service whenever required. Will likely work again with him for future projects. Thank you very much.

Developer to work on WebAPP

May 13, 2021 - May 30, 2021

85 Hours | $21 / hr

Henri has great mix of expertise for a complete full stack development. He is quick to understand the requirement and turn around project's quickly.

Zencoder API plugin

June 8, 2021 - June 19, 2021

75 Hours | $20 / hr

I was very happy with his understanding of what to me was hard to explain. His skill set was more than I had hoped for and he was very easy to deal with.

Laravel + Vue developer

June 28, 2021 - July 15, 2021

109 Hours | $22 / hr

Henri is an excellent professional with tremendous knowledge and skills. I would hire him again without a doubt.

Build and promote WordPress Site

July 24, 2021 - August 5, 2021

78 Hours | $20 / hr

Henri is a very talented web designer with a great eye for detail. He is a pleasure to work with, highly responsive, and just an all-around great collaborator. I highly recommend.

Shopify Store Edits and Fixes

August 15, 2021 - August 31, 2021

85 Hours | $21 / hr

Henri was fantastic to work with. Very responsive and great work. Above all though his attitude was tremendous. Even as I added some tweaks he never hesitated to take care of what I needed. Highly recommended and will definitely be working with him in the future.

iBeacon Management Web-app

September 11, 2021 - October 2, 2021

123 Hours | $22 / hr

Great working with Henri on my PHP / SQL beacon project. I will 100% be using him again, and again, for continued development.

API integration with Nuxt App

October 13, 2021 - October 30, 2021

91 Hours | $21 / hr

Henri helped me successfully with the integration using Vue.js & Nuxt.js. He is very knowledgeable I will definitely be working on the future. Also, I'd recommend his service to anyone in the same situation.

Some edit of VueJS webpage

November 8, 2021 - November 26, 2021

104 Hours | $22 / hr

He has been a pleasure to work with every step of the way in a complex, multi-month contract. I will definitely work with Henri again!.

Update a javascript

December 5, 2021 - December 21, 2021

96 Hours | $21 / hr

Henri completes tasks super quickly with regular communication. He makes changes almost instantly if needed. Thank you so much.

Need hands-on learning: MERN (MongoDB, Express, React, Nodejs) and CSS flexbox

January 3, 2022 - January 22, 2022

116 Hours | $22 / hr

Henri is the first and only person that I have worked with on Upwork so far because he is awesome at what he does. On top of all other work that I have had Salman do for me, he is an excellent teacher. I learned so much from him and his real world work experience! Looking forward to any and every opportunity to work with him again!

Chrome Extension Developer (JS/HTML/CSS)

January 30, 2022 - February 13, 2022

84 Hours | $20 / hr

Quality code and great communication. He has great attention to details and knows how to solve complex tasks. Recommending him for sure!

Angular Frontend Developer needed to finish a project

February 22, 2022 - March 12, 2022

96 Hours | $21 / hr

Henri was great. He completed the tasks quickly without any overhead. I highly recommend him and will consider him for future projects.

ecommerce shop development

March 15, 2022 - March 24, 2022

69 Hours | $20 / hr

Henri did a great job and was able to get the work done with a quick turnaround. Thanks! Happy to work together again.