CTO
2012 - PRESENTMy Daily Bits, LLC- Designed and implemented a Xamarin Forms-based consumer mobile app for iOS, Android, and UWP.
- Delivered over 6 million downloads, at a 4.5 star review average.
- Implemented an A/B testing based experimentation platform to improve several KPIs including downloads, rating, conversion to paid subscription, and retention.
- Trained and implemented a machine vision model to classify camera stream in real time on Android and iOS.
Technologies: Amazon Web Services (AWS), Core ML, TensorFlow, Azure, AWS, Xamarin.Forms, CTO, Architecture, Data, Market fit, Headless SoftwareSenior Product Engineer
2014 - 2017Intapp- Developed high-performance, consumer-grade mobile apps from scratch.
- Improved web application performance by 80+%.
- Realized advanced modules including automated document generation and score profile calculation.
- Improved the development process to increase predictability and software quality.
- Enabled AWS-based cloud deployment of an enterprise grade web application.
Technologies: Mobile Device Management (MDM), HTML5, ASP.NET, C#, Android, iOS, Architecture, Data, Market fitSenior Engineering Lead
2008 - 2014Microsoft- Revolutionized SharePoint online service management. Identified, planned, designed, and delivered enterprise class data center monitoring, diagnostics, and manual and automated issue recovery with on-call rotation management solutions.
- Implemented and used usage instrumentation and big data analysis, stakeholder and partner requirement management, investment prioritization, feature design, and high level architecture.
- Created a highly available service diagnostics console on SOA architecture (Merlin) used by 350 engineers per day. Provided real-time access to big data (200TB/day) for service investigation, analysis, and recovery.
- Implemented professional data center management software that improved service availability by 75% and reduced manual change implementation by 80% (Joblets).
- Delivered FISMA and Chinese government compliant service management software.
- Enabled automated investigation and problem resolution (reduced service outages from days of SLA missed to <15 min recovery times).
Technologies: SharePoint, Visio, Microsoft PowerPoint, Microsoft Excel, Windows PowerShell, Windows Communication Framework (WCF), C#, Architecture, DataLead Software Developer
2005 - 2008Sogeti Consulting- Managed the development of a front-office internet application in a MS CMS and SharePoint 2003 portal system environment.
- Refined intake and development on a procedural level including project initiation, planning, and controlling.
- Reviewed and approved business requirements, specifications, and technical designs.
- Collaborated with business managers/engineers to build consensus around architectural solutions.
- Implemented a customer-facing front-end system for a major insurance company.
- Oversaw a team SharePoint implementation for a multi-national company.
- Led the project to create a cross-departmental knowledge management system for a global investment bank.
Technologies: BizTalk, SQL, ASP.NET, C#, DataSenior Software Developer
2002 - 2005Xeed Marketing- Performed extensive coding in Microsoft .NET (C#, ASP.NET) in a web-based environment. Designed and reviewed high-level architecture and the design of solution components.
- Communicated with businesses to identify high-level and detailed requirements.
- Directed the team of onsite and offshore developers. Led through all phases of the project lifecycle.
- Led projects from concept through completion. Liaised with project managers, business stakeholders, QA, and other team members.
- Designed and implemented marketing collateral management and a template-based advertising publishing portal for Mitsubishi, Nissan, MG Rover, Citroen, and the Profile Tire Center.
Technologies: PDF, SQL, ASP.NET, C#, Data, Content Management Systems (CMS)Software Developer
2000 - 2002Adis Retail- Implemented complex technical solutions.
- Prototyped a visual configuration tool.
- Created a website for an asset movement display.
- Designed a middle tier framework for flexible architecture, usable on servers worldwide.
- Produced several retail data analysis tools, a Unix to Windows software conversion tool, and an asset management website.
Technologies: Microsoft Access, VB.NET, SQL, Visual Basic 6 (VB6)
Wouter Steenbergen
Native Mobile Apps Developer in San Ramon, CA, United States
Member since February 10, 2014
A highly motivated, versatile, and skilled Xamarin Forms expert, Wouter has demonstrated expertise in software design and delivery covering large-scale cloud services, mobile apps, and on-premise software. He has proven ability to identify and drive strategic programs from inception to launch and thrives in collaborative, team-oriented, and ambiguous environments. He has excellent interpersonal skills and is passionate, creative, and dedicated.
Wouter is now available for hire
Portfolio
- My Daily Bits, LLCAmazon Web Services (AWS), Core ML, TensorFlow, Azure, AWS, Xamarin.Forms...
- IntappMobile Device Management (MDM), HTML5, ASP.NET, C#, Android, iOS...
- MicrosoftSharePoint, Visio, Microsoft PowerPoint, Microsoft Excel, Windows PowerShell...
Availability
Part-time
Preferred Environment
Visual Studio
The most amazing...
...Xamarin phone app I've ever built has been downloaded over 6 million times, consistently getting 4.5+ star reviews.
Employment
Experience
- Food Diary App (Xamarin Forms)https://ieatbetter.com
The most recent phone app, currently available in 42 markets, for iPhone, Android, and UWP.
The app started on Windows Phone, but was migrated to Xamarin.Android and Xamarin.iOS at first. When Xamarin Forms became available, the whole application was ported to that platform. - iPad and Windows App
This application is being used for factory and oil rig inspections; quality, stability, and ease of use are prioritized.
It was originally developed for iOS only, with Xamarin.iOS. I worked with the company to port the application to Xamarin Forms for use on multiple platforms. We also delivered several extensions and additional modules. - Xamarin Forms for Medical Devices
Implemented a production quality version of a medical imaging application in Xamarin Forms, for UWP, Android, and iOS.
The existing team at this Toptal customer developed a proof of concept based on a website that is developed internally. When management approved the production quality implementation, they contracted with me to get it done.
Part of the project involved getting the team up to speed on contemporary software design principles. The project was organized with scrum, with daily standups. - Order Form App
This greenfield development project involved creating an order form application for use on Windows Desktop, laptops, iPads, and Android tablets. Some of the most interesting aspects include:
• A custom control for moving items into groups
• Automatic sync conflict resolution for users with multiple devices
• An XLS to configuration converter with an upload website with extensive validation
• Real-time and permissive business rule validation in the UI
Skills
Languages
JavaScript, C#, Java, Python, SQL, Visual Basic 6 (VB6), VB.NET, HTML5Frameworks
ASP.NET, Spring, .NET, Windows Communication Framework (WCF), Windows PowerShell, Core MLLibraries/APIs
WinForms, Node.js, Azure Cognitive Services, TensorFlowParadigms
Agile Software Development, DevOps, Waterfall DevelopmentPlatforms
Xamarin, SharePoint, Windows, Azure, Amazon Web Services (AWS), iOS, AndroidOther
Xamarin.Forms, Freelance, Software Development, Data, CTO, Architecture, Market fit, Headless Software, Content Management Systems (CMS), BizTalk, PDF, Mobile Device Management (MDM), AWS, Native Mobile Apps, Machine Vision, Natural Language Processing (NLP)Tools
Visual Studio, Microsoft Excel, Microsoft PowerPoint, Visio, Microsoft Access
Education
- Bachelor's Degree in Philosophy and Information Technology1997 - 2000Vrije Unversiteit Amsterdam - Amsterdam
