Sem Jansen - Hire at Ithire

Sem Jansen


  • Hourly Rate$27-27 / Hr
  • Total Earned$49832
  • Experience10 Years


  • HTML5
  • CSS3
  • JavaScript
  • jQuery
  • Ajax
  • Bootstrap
  • Foundation
  • UI / UX
  • React js
  • React Native
  • Node js
  • Wordpress

I’m a Full-Stack software developer

Heyy! I’m a Full-Stack software developer with more than 10 years of experience in the industry. The main technologies which I used in my previous projects were Python, Angular, React, SQL, Linux, AWS, Javascript, HTML, CSS. My skills are listed below but not limited to: ASP.NET, .NET, .NET Core, Angular.js, C#, MVC, CSS, HTML, JavaScript, JQuery, Bootstrap, SQL Server, WebAPI(RESTFull & SOAP), Drupal, Laravel,React Native, Native, Django, Python, PHP, Node.js,WordPress, Shopify, Wix, Squarespace, WebFlow, Flutter Strong communication, interpersonal, intuitive, planning, analysis, troubleshooting, and leadership skills Thanks & Regards, Sem Jansen.


Developer needed for creating a CRM website

February 15, 2019 - March 10, 2019

108 Hours | $22 / hr

"I want to thank Sem for a job well done. It wasn't an easy one but he managed to develop the right tools in my favourite application. I wish you all the best and we'll work together again soon. Cliff"

Front End developer

April 13, 2019 - April 28, 2019

71 Hours | $24 / hr

"Sem did really well. His creativity and hard-work is remarkable. Did whole project without any drag or interruptions."

Magento Expert Required

June 6, 2019 - July 12, 2019

175 Hours | $23 / hr

"Sem is a great developer. I'd recommend for anyone looking for good Magento developer."

React.js Developer needed to create custom Components

September 10, 2019 - September 29, 2019

102 Hours | $20 / hr

"He was the best freelancer we ever had! Good code quality, delivered in time, every time. The communication was superb. We will work definitely again with him."

MERN stack developer for additional features

October 10, 2019 - October 30, 2019

116 Hours | $24 / hr

"Huge thank you to Sem for prompt work, clean code and perfect working features he implemented and tested. Highly recommend dealing with him. He is really professional in their stack. I hope to work with youagain!"

Webflow Edits

December 1, 2019 - December 15, 2019

62 Hours | $24 / hr

"Thank you very much"

Transition MS Access Database / SQL Server to AWS Option

January 30, 2020 - February 29, 2020

143 Hours | $20 / hr

"Sem is an excellent and exceptionally talented Full Stack Developer. I have enjoyed working with him, and I look forward to hiring him again for additional projects. Sem is patient, kind, and always willing to assist. His creative and innovative approach has provided me with efficient and cost-effective upgrades that stem from his expertise with ASP.Net, MS Access, and MS SQL DBA. I would highly recommend Sem for any individuals or companies looking for professional and knowledge-based Full Stack Development requirements."

Database expert needed to build database

April 1, 2020 - April 28, 2020

125 Hours | $20 / hr

"Sem was awesome to work with. His communication was clear and timely and he delivered exactly what we needed. Couldn't be happier and would highly recommend him to anybody looking for a database architect! Thanks Sem!!"

Need help fixing custom code in Squarespace that is interfering with menu functionality

May 10, 2020 - May 20, 2020

61 Hours | $25 / hr

"Sem was hired and completed my job in one day. He was easy to work with, affordable, and did fantastic work. Very satisfied."

Build admin portal for a Platform that connects makers to consumers

July 20, 2020 - August 25, 2020

177 Hours | $19 / hr

"We enjoyed working with Sem! He was engaged in the project and helped us create a back end for our project that is highly scalable. Good communication skills and work ethic."

Full Stack or Back End Developer with Azure experience

October 1, 2020 - October 15, 2020

74 Hours | $25 / hr

"Sem did a good job"

Full Stack Developer - Advice Needed on the Development of a Project Management Reporting Portal

December 5, 2020 - December 30, 2020

111 Hours | $19 / hr

"Sem is amazing. He was professional, prompt, trustworthy and a pleasure to work with. I would definitely recommend Sem and I look forward to working with him again."

RoR/Spree + React Developer for eCommerce

January 24, 2021 - February 27, 2021

184 Hours | $23 / hr

"Working with Sem I can say that he is verry knowledgable and experienced fullstacker. Great command of english and flexible! Enjoyed discussing various technical solutions for our comlex ecommerce admin panel. His vast experience meant that we could quickly agree on an implementation strategy with satisfactory result. Sem was also instrumental in testing and debuging our app along the way. Will definitely work with Sem for other features of our app."

Migrate Power BI embedded JS script to Vue.js

April 2, 2021 - April 25, 2021

101 Hours | $23 / hr

"Sem migrated my PowerBI js script to Vue and did a great job. Very happy with the result. I highly recommend him."

React - Fix a Countdown component to work and display correctly CONTINUATION

May 26, 2021 - June 10, 2021

63 Hours | $25 / hr

"Good job once again"

Senior React/Node Developer

July 1, 2021 - July 26, 2021

129 Hours | $19 / hr

"Sem did a great job. His skill is professional and he delivered a perfect result every time. I hope to work with him again. Thank you!"

Build Cloud Based Software to Interact with Mobile App

September 1, 2021 - September 24, 2021

99 Hours | $26 / hr

"This contractor was fantastic and I would highly recommend. He was able to complete the job successfully, and advised me on how I may complete another task with the most efficiencies, very helpful."

python to extract and manipulate excel data

November 10, 2021 - December 13, 2021

173 Hours | $21 / hr

"Sem is a skilled Python programmer, and delivered good work on this project. It is a real pleasure to work with him, he met our deadline, and his skills met our expectation. We will continue working with him in future projects."

Android app and Windows 10 service

January 1, 2022 - February 28, 2022

221 Hours | $20 / hr

"Great communication great flexibility and overall a very constructive development relationship. Will hire him again..."