Koen Bekkenutte, Scalable Architecture Developer in Lisbon, Portugal
Koen Bekkenutte

Scalable Architecture Developer in Lisbon, Portugal

Member since March 20, 2015
Koen is a passionate developer with a love for a wide range of technological practices and a keen eye for quality and communication. He brings over a decade of experience in building services and applications, both solo as well as in teams. Koen can be trusted to complete a project on time and within budget while staying true to the expected quality.
Koen is now available for hire


  • Freelance
    Umbraco, WordPress, T-SQL, TypeScript, JavaScript, PHP, Python, C#...
  • ZampleBox
    Azure, Microsoft SQL Server, AngularJS, ASP.NET Core, C#, JavaScript, SQL...
  • WeTrada
    Azure, .NET, C#, ASP.NET Core, JavaScript, SQL, Bootstrap, Git, HTML, CSS, CTO



Lisbon, Portugal



Preferred Environment

Microsoft Visual Studio, .NET, ASP.NET, C#, .NET Core, ASP.NET Core, JavaScript, SQL, Git

The most amazing...

...thing I've created is an app to help people with limitations get online using only their voice, long before the iPhone became popular.


  • Consultant, Developer

    2005 - PRESENT
    • Built a ticket management system for events.
    • Created numerous company and product websites and applications.
    • Joined existing teams to temporarily boost productivity.
    • Designed and implemented a CRM with automation capabilities.
    • Acted as an external auditor reviewing quality, robustness, and security.
    Technologies: Umbraco, WordPress, T-SQL, TypeScript, JavaScript, PHP, Python, C#, ASP.NET Core, SQL, Bootstrap, Git, HTML, CSS, PostgreSQL, Node.js, Cloudflare
  • Developer

    2016 - 2018
    • Worked as a core developer on the main eCommerce product.
    • Helped drive the development of new core business features.
    • Migrated the application from ASP.NET MVC 5 to ASP.NET Core.
    Technologies: Azure, Microsoft SQL Server, AngularJS, ASP.NET Core, C#, JavaScript, SQL, Bootstrap, Git, HTML, CSS
  • Tech Lead

    2015 - 2017
    • Set up a brand new unique online shopping portal.
    • Automated a shopping experience that offers customized communication flows.
    Technologies: Azure, .NET, C#, ASP.NET Core, JavaScript, SQL, Bootstrap, Git, HTML, CSS, CTO
  • Founding CTO

    2013 - 2016
    Postvid, Ltd.
    • Built a highly scalable back-end service for uploading, handling, converting, and composing user media (photos, videos, and audio).
    • Created a web application for creating a fully customized video greeting card.
    • Created a full-stack order pipeline service for order and payment tracking with full QOS reporting and alerting.
    • Established the technical vision and led all aspects of IT-related development.
    • Conducted research and case studies on cutting-edge technologies.
    Technologies: Azure, Durandal, C#, ASP.NET Core, JavaScript, SQL, Bootstrap, Git, HTML, CSS, CTO
  • API Developer

    2015 - 2015
    Litmus (via Toptal)
    • Created a high performance API with synchronization capabilities for external services.
    Technologies: Amazon Web Services (AWS), AWS, .NET, C#, ASP.NET Core, SQL, Git
  • .NET Developer

    2015 - 2015
    hopIN (via Toptal)
    • Migrated over an existing software solution to a more efficient hosting plan on Azure.
    • Solved a number of issues with the application.
    Technologies: Azure, .NET, C#, ASP.NET Core, JavaScript, SQL, Git, HTML, CSS
  • PHP Developer

    2015 - 2015
    Bumptext (via Toptal)
    • Solved numerous issues with the existing software solution.
    • Proposed a path forward.
    Technologies: XAMPP, PHP, Git, HTML, CSS
  • Azure Expert

    2015 - 2015
    Silec (via Toptal)
    • Helped to create a deployment strategy for hosting the in-house web application on Azure.
    Technologies: .NET, Azure, C#, ASP.NET Core, SQL, Git, HTML, CSS
  • Consultant, Developer

    2011 - 2015
    Web Power
    • Served as product owner and architect for a major new email marketing product.
    • Developed and implemented various web applications and integration solutions for numerous clients.
    • Worked as lead architect on an experimental new back-end system for handling all data transactions for the entire product family.
    • Consulted both internally and externally on various IT-related topics.
    • Handled developer training for clean and testable code with state of the art technologies and practices.
    Technologies: JavaScript, MySQL, PHP, C#, ASP.NET Core, SQL, Git, HTML, CSS
  • Lead Developer

    2006 - 2011
    • Created services for mass news profiling and analytics.
    • Built a recommendation system matching users based on online behavior, suggesting contacts and sources.
    • Created online web portals for displaying and managing news (similar to Google Now).
    • Created desktop applications for numerous clients, combining features such as RSS tracking, weather information, and commenting.
    • Built various in-house websites and applications for top 500 enterprises.
    Technologies: T-SQL, JavaScript, PHP, C#, ASP.NET Core, SQL, Git, HTML, CSS


  • Postvid Consumer Platform

    Postvids are a new breed of direct marketing and impact marketing communication tools. Postvids drive home your brand and campaign messages through hi-definition LCD screens and powerful audio speakers encased in a full color, fully customizable, printed brochure or booklet.

  • WeTrada Website

    You get together with others who want to buy the same product. You buy the things you love together as a group! Now it’s possible to place orders directly with the manufacturer without having to deal with cost-adding merchants and middle men. Straight from the factory to your home. The savings are spectacular!

  • Toptal Mentor
    Koen is a mentor in the Toptal Global Mentor’s Program. This program is a partnership between Toptal and General Assembly to provide high quality mentorship for students from minority and low income backgrounds who are looking to begin their careers as professional software engineers. Koen shows commitment to diversity in tech by mentoring a General Assembly student every week for a year, covering everything from coding tips and tricks to advice on making it in the industry.


  • Languages

    C#, SQL, JavaScript, HTML, CSS, T-SQL, TypeScript, PHP, Python, Java, F#, Scala
  • Frameworks

    ASP.NET Core, ASP.NET Core 2, Aurelia, .NET, ASP.NET, Durandal, ASP.NET Web API, ASP.NET MVC, .NET Core, Bootstrap, Angular, AngularJS, Windows Presentation Foundation (WPF), Windows Communication Framework (WCF), PhoneGap, Knockout (Knockout.js)
  • Platforms

    Azure Functions, Azure, WordPress, Umbraco, XAMPP, Amazon Web Services (AWS)
  • Other

    Front-end Development, Architecture, CTO, Azure Service Bus, Scalable Architecture, Cloudflare, AWS, Cordova, Big Data
  • Libraries/APIs

    Node.js, jQuery UI, jQuery, SignalR, Twitter API, LinkedIn API, Facebook API
  • Tools

    Azure IoT Suite, Microsoft Visual Studio, Git, Subversion (SVN), Mercurial
  • Storage

    Azure Cosmos DB, MySQL, Microsoft SQL Server, PostgreSQL
  • Paradigms

    Functional Programming, Reactive Programming, Concurrent Programming


  • Bachelor's Degree in Computer Science
    2005 - 2008
    Windesheim University - Netherlands


  • Azure Developer Associate
    JUNE 2020 - JUNE 2022
  • DevOps Engineer Expert
    JUNE 2020 - JUNE 2022
  • Azure Solutions Architect Expert
    FEBRUARY 2020 - FEBRUARY 2022
  • Associate Cloud Engineer
    DECEMBER 2019 - DECEMBER 2021
    Google Cloud

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