Hannah De vries
Fullstack Developer
Experience
Jan 2025 - Present
5 monthsFullstack Developer
DB Cargo (Freelance)
- Development of Blazor-Server Applications for data management.
- Focus on unifying design and user experience.
- Mentoring junior developers, establishing and consulting for coding guidelines and best practices.
- Technologies: .NET 9, Blazor Server, MudBlazor, HTML, CSS, MS SQL Server (T-SQL, Views, Trigger, Stored Procedures, Table-Valued Functions), Entity Framework, Visual Studio, Scrum, agile, git
Aug 2024 - Dec 2025
5 monthsFullstack Developer
LeafConnect (co-founder)
- Co-Founder of a startup focused on delivering innovative software solutions, taking on responsibilities in fullstack development with angular and Java.
- Contributed to a wide range of startup activities, including product strategy, team collaboration, and operational decision-making, ensuring the company's growth and success.
- Technologies: Angular, Java, Springboot, REST, prostgres, github, Linear, IntelliJ IDEA, figma, wordpress, Elementor
Sep 2023 - Sep 2024
1 year 1 monthApp Developer
rc-tec (Freelance)
- Development of mobile applications for monitoring and steering of alarm systems.
- Frontend and backend development in .NET Maui, enabling cross-platform compatibility for iOS and Android devices.
- Technologies: .NET 8, MAUI, XAML, WPF, Visual Studio, agile, git, Jira, Azure DevOps
Nov 2022 - Present
2 years 7 monthsCloud Developer
Carl Zeiss IMT (Freelance)
- Development of an Azure Function App for displaying machine data from different sources in Azure.
- Management of resources in Azure, design of data structures for Azure Cosmos DB, refactoring of legacy code.
- Design of infrastructure and pipelines.
- Technologies: .NET, Azure Functions, Cosmos DB, angular, AzureDevOps, Countious Integration, cypress, automated testing, Entity Framework, Visual Studio, Scrum, agile, git, bicep
Sep 2022 - Apr 2024
1 year 8 monthsSoftware-Engineer
DB Cargo (valantic STI)
- Database design, optimization and maintenance for a monthly accounting application, programming of stored procedures for data processing in MS SQL Server.
- Development of a Blazor Server application for data import in .NET 7.
- Technologies: .NET 7, Blazor Server 5.0, MudBlazor, HTML, CSS, MS SQL Server (T-SQL, Views, Trigger, Stored Procedures, Table-Valued Functions), Entity Framework, Visual Studio, Scrum, agile, git, Scheduler framework experience
May 2022 - Sep 2022
5 months Frankfurt, Germany
Full Stack Developer
Stadt Frankfurt (valantic STI)
- Development of a Blazor Server application for managing rental deposits in .NET 5, database design (MS SQL Server) and requirements engineering.
- Unit and integration testing with xUnit.
- Technologies: .NET, Blazor Server, MS SQL Server, HTML, CSS, REST API, Swagger, Syncfusion Blazor Components, DevExpress Blazor Components, AutoMapper, Azure DevOps, Visual Studio, xUnit, Entity Framework, git, Unit Testing, automated
Mar 2022 - May 2022
3 monthsFull Stack Developer
HAGE (valantic STI)
- Development of a web application for administration of invoices for therapeutic treatments in schools with Blazor Server .NET 6.
- Database design in MS SQL Server and data migration from legacy software.
- Unit testing and integration testing with xUnit.
- Technologies: .NET, Blazor Server, MS SQL Server, HTML, CSS, Syncfusion Blazor Components, DevExpress Blazor Components, AutoMapper, Azure DevOps, Visual Studio, xUnit, Unit Testing, automated
Nov 2019 - Feb 2022
2 years 4 monthsBackend Developer
Carl Zeiss Microscopy
- Development of a machine learning segmentation extension for a desktop application with .NET Framework, WPF and python.
- Design and implementation of API for machine learning backend.
- Implementation of image processing algorithms in C# and python.
- Technologies: C#, .NET Framework, MVVM, WPF, Visual Studio, NUnit, python, scikit learn, Machine Learning, REST API, Scrum, Unit Testing
Summary
As a fullstack developer, I bring hands-on experience in building robust web and mobile applications using .NET, Blazor Server, Angular, and Java. My focus is on delivering clean, maintainable code and creating seamless user experiences, whether for enterprise data management, cloud-based solutions, or cross-platform mobile apps.
I have a strong background in database design and optimization with MS SQL Server and Azure Cosmos DB, and I’m comfortable with both backend and frontend development. My work includes mentoring teams, setting up coding standards, and driving agile processes. I’m experienced in cloud infrastructure on Azure, automated testing, and continuous integration.
With a track record in startups and large organizations, I adapt quickly and deliver solutions that scale. My certifications in Azure administration and development support my ability to design and implement modern, cloud-native applications.
Languages
German
Native
English
Advanced
Education
Oct 2011 - Jun 2015
OTH Regensburg
Bachelor of Science · Informatik · Regensburg, Germany
Certifications & licenses
AZ-104: Microsoft Azure Administrator
AZ-204: Developing Solutions for Microsoft Azure
Similar Freelancers
Discover other experts with similar qualifications and experience