Marko Cirkvenčić, Developer in Šenkovec, Croatia
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Marko Cirkvenčić

Verified Expert  in Engineering

Software Developer

Šenkovec, Croatia
Toptal Member Since
November 19, 2019

Marko is an IT specialist with a Master's degree in Informatics and 11 years of experience in software development with .NET and Microsoft SQL Server platforms. He's reliable, responsible, and an ambitious person, ready to master new skills and achieve new successes. He enjoys following new technologies with a focus on HTML5 and JavaScript.


React, Web API, Microsoft SQL Server, .NET
NTH Mobile
jQuery, Spring, Java, Java EE, MySQL
Windows Communication Foundation (WCF), Windows Forms (WinForms)...




Preferred Environment

SQL Management Studio, Mercurial, Git, Visual Studio Code (VS Code), Visual Studio, Windows

The most amazing...

...thing I have developed is a Casino mobile site with 500+ concurrent users and over 100+ transaction per second!

Work Experience

Senior Full-stack Developer

2016 - PRESENT
  • Contributed to the mobile web application for a casino with more than 500 concurrent users.
  • Worked on private CRM projects for small businesses and software as a service.
  • Focused on optimization, SEO, high-availability, and high-performance of the casino site.
Technologies: React, Web API, Microsoft SQL Server, .NET

Senior Full-stack Developer

2015 - 2016
NTH Mobile
  • Developed a CRM system for internal use and our customers' use.
  • Imported massive amount of CRM tags into system and searching thru them.
  • Contributed to an internal CMS system for managing multiple sites from our customer.
Technologies: jQuery, Spring, Java, Java EE, MySQL

Senior Developer

2013 - 2015
  • Developed SolidWorks and CATIA PLM plugins for CAD systems.
  • Developed Microsoft Office plugins for CAD systems.
  • Maintained and upgraded Java REST service to the newest features of the CAD system.
Technologies: Windows Communication Foundation (WCF), Windows Forms (WinForms), Microsoft SQL Server, .NET

Senior Developer

2011 - 2013
  • Developed a web-based support portal for IT crew to help them with their work.
  • Developed IPTV live betting application in InfoPages technology.
  • Developed live betting backed for mobile applications with REST API.
  • Implemented over 30 reports in SQL Server Reporting Services for the management team.
Technologies: SQL Server Reporting Services (SSRS), Web, ASP.NET, Microsoft SQL Server, .NET


2008 - 2011
  • Implemented a web-based module for the DMS system to easily access documents.
  • Implemented a B2B solution for an IT distribution company.
  • Created a customized web solution for a construction firm for managing people and resources.
Technologies: Windows Communication Foundation (WCF), iTextSharp, ASP.NET Web Forms, ASP.NET, Microsoft SQL Server, .NET

Mobile Application for Casino
Mobile web-based application for a casino. I worked on the front end with React and CSS3 and on the back end REST API with web API. While fetching data from the database, I had to ensure a very fast response.

Hivergen DMS
Hivergen DMS is a customizable document and knowledge management system for managing document archives and business processes with advanced workflow, developed on Microsoft stack with SQL Server and ASP.NET. Users could drag and drop items and tasks to the workflow and work within a wide range of possibilities.

IPTV Live Betting On-screen

Developed an IPTV live betting application on InfoPages technology for the largest IPTV distributor in the country. Users could watch a live match and create a ticket on television, shown on a transparent modal window.

SolidWorks PLM Plugin

Worked on SolidWorks plugin, with many featured integrated directly in SolidWorks. Users could log in, fetch models or create new ones, update them, and create a new version, then push the changes to the repository.
2003 - 2008

Master's Degree in Informatics

Faculty of Organization and Informatics - Varaždin, Croatia


Microsoft Specialist: Programming in HTML5 with JavaScript and CSS3



Microsoft® Certified Technology Specialist: SQL Server 2008, Database Development



Microsoft® Certified Technology Specialist: .NET Framework 4, Web Applications



jQuery, React, Node.js, iTextSharp, Windows Forms (WinForms), Web API


Visual Studio, Git, Mercurial, SQL Management Studio


.NET, ASP.NET, ASP.NET Web API, ASP.NET Web Forms, Spring


iOS, Windows, Visual Studio Code (VS Code), Web, Java EE


C#, HTML5, JavaScript, CSS3, Java


Microsoft SQL Server, SQL Server Reporting Services (SSRS), MySQL


Web MVC, Windows Communication Foundation (WCF)

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