Andreas Grutz - Senior Full-Stack .NET & Angular Developer

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Erkrath, Germany

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Experience

Oct 2023 - Present

3 years 2 months

Germany

Remote

Senior Fullstack .NET (Core) & Angular Developer

IT Service Provider

Supported several agile teams in developing a new enterprise CRM and ERP application
Web frontend development with Angular 17–21 (Microfrontends, Domain-Driven Design, MDB-Bootstrap)
Backend development with C# and .NET 7–10, MongoDB, MassTransit, RabbitMQ, Entity Framework Core, ElasticSearch (microservices, DDD)
Technical feature design for assigned tasks
Technical architecture planning, including forward-looking plans for AI-powered enhancements
Proof-of-concept implementation of AI-powered workflows with n8n and a locally hosted LLM (Ollama)
Coordinated with stakeholders and Product Owners and supported sprint planning

Result: Delivered production-ready microservices and frontend modules in agile sprint cycles.

Environment: .NET 7–10 · Angular 17–21 · C# · TypeScript · OpenAPI · Microfrontends · DDD · Kubernetes · Docker · Helm · MS SQL Server · PostgreSQL · MongoDB · MassTransit · RabbitMQ · EF Core · ElasticSearch · Kibana · Azure DevOps · KeyCloak · n8n · Ollama

Jun 2022 - Sep 2023

1 year 4 months

Germany

Senior Fullstack Developer .NET (Core) & Azure Developer Associate

Compliance Management

Developed a cloud-based compliance management solution from scratch as part of an agile team (SCRUM)
Set up and used a containerized Kubernetes application infrastructure (Azure AKS)
Supported the replacement of an Azure Service Bus solution with Azure RabbitMQ Server (operations and development)
Supported the replacement of Auth0/Okta as the identity and access management solution and migration to KeyCloak (operations and development)
Web frontend development (React.js)
Backend development (.NET Core 6/7 & Entity Framework & Azure MS SQL databases)
Developed new automated GitLab CI/CD pipelines using the HELM package manager to deploy Kubernetes applications in a structured and scalable way
Ensured software quality by developing and using unit and integration tests, as well as SonarQube for statistical quality analysis
Coordinated with stakeholders & Product Owners
Supported sprint planning

May 2021 - Jun 2022

1 year 2 months

Germany

Fullstack Developer .NET (Core) & Angular

Media

Supported an agile team in enhancing an enterprise-wide Media Asset Management system for images and videos
Developed a new web-based frontend for media ingestion (SPA, Angular 12)
Maintained other web-based frontends in use (SPA, Angular 9)
Developed and enhanced (micro)services and APIs for the media workflow (.NET 5 & 6, Entity Framework Core, RabbitMQ, Docker, Kubernetes)
Developed and enhanced NuGet libraries (.NET Standard 2.1)

Jun 2020 - Apr 2021

11 months

Germany

Senior Backend Developer .NET Core

Retail / Logistics

Developed a platform for logistics track-and-trace processes in retail based on .NET Core and Entity Framework Core

Sep 2019 - Apr 2020

8 months

Emmerich, Germany

Senior Angular Frontend Developer

Industry

Developed a roaster management system as a web-based frontend (SPA)
Implemented components for roaster configuration (GUI Template-Driven-Forms/Styles, Custom Controls CDX)
Implemented components for PDF document export (pdfmake Angular library)
Implemented components for centralized translation management, including export/import functionality (GUI Template-Driven-Forms/Styles, ExcelJS Angular library)
Coordinated GUI design with an external design studio

Jan 2015 - Aug 2019

4 years 8 months

Ebikon, Switzerland

Senior Fullstack Developer

Industry

Further development of a web-based customer portal dashboard (ASP.NET Web Forms, HTML, jQuery, AJAX, C#, SharePoint 2010/2013)
New development of a web-based planning and design tool (ASP.NET MVC 4 Razor, HTML5, jQuery, C#)
New development of cloud-based solutions as part of the Ahead strategy – ActionBoard (Azure Cloud & DevOps, ASP.NET Core, Angular, C#, Typescript, SCSS, EF, Extensible Framework)
Implementation of SOA architecture (SOAP WCF, REST Swagger) on-premise and in Azure
Web API design and development
Database development using MS SQL Server 2012-2016/Azure with T-SQL and CTE
Unit test development

Aug 2014 - Dec 2014

5 months

Munich, Germany

Senior Fullstack Developer

Bank

New development and maintenance of specific intranet applications

Oct 2013 - Jun 2014

9 months

Ebikon, Switzerland

Senior Fullstack Developer

Industry

New development of a corporate portal (ASP.NET Webforms, C#, SharePoint)
Development of web services for data communication (C#)
Database development using MS SQL Server 2012 with T-SQL and CTE
Creation of reports with MS SSRS

Jul 2013 - Sep 2013

3 months

Cologne, Germany

Senior Fullstack Developer

System House Security

Frontend development for a new customer product (WPF, XAML, C#)
Design and implementation of the required business and data layers in C#

Apr 2013 - Jun 2013

3 months

Hanover, Germany

Application Developer C#/C++ Windows Embedded Systems

Industry

Maintenance and further development of components for embedded systems (TVM Ticket Vending Machines) in C# (business layer and GUI) and C++ (hardware layer)
Code analysis and performance tuning
Creation of unit tests

Aug 2011 - Mar 2013

1 year 8 months

Essen, Germany

Senior Fullstack Developer

Energy Industry

Designed and developed a high-performance SOA for transferring and processing real-time data from connected wind turbines (OPC DA, OPC XML DA)
Analyzed, designed, and developed interfaces for connecting and processing aggregated operating data from alternative power plants
Maintained and enhanced a Silverlight frontend (Silverlight 4, C#, MVVM)
Maintained existing interface modules (VB.NET, C#)
Server management via PowerShell Cmdlets

Oct 2010 - Jul 2011

10 months

Düsseldorf, Germany

Senior Fullstack Developer

Bank

Replaced an existing banking application
Frontend design and implementation with Telerik RAD Controls (MVC 3)
Supported data modeling with Entity Framework 4.x
Developed web and WCF services in C#
Prototyped the application being replaced with WPF (XAML, MVVM)

Mar 2007 - Sep 2010

3 years 7 months

Bonn, Germany

Technical Architect & Senior Fullstack Developer

Postal Services

Maintained and enhanced a retail application for branch operations
Process and data modeling with ARIS
Analysis, planning, design
Migration .NET 1.1 → .NET 2.0 and SQL Server 2000 → 2005
Development with C#/ASP.NET (.NET 2.0-4.0), WCF, WPF, LINQ, JavaScript, Silverlight 3/4
Developed automated unit tests
Development leadership and technical architecture
Developed customer self-service prototypes (Silverlight, TELERIK, WCF Data Services)

Oct 2006 - Feb 2007

5 months

Düsseldorf, Germany

Senior Fullstack Developer

Bank

Maintained a Primanota application (VB6, Oracle 8i, ODBC)
Migrated a central banking application from VB6 to VB.NET 2005 and Oracle 8i to 10g R2

Nov 2004 - Aug 2006

1 year 10 months

Vaduz, Liechtenstein

On-site

Backend Developer

Bank

Project for national and international payment transactions (SIC, euroSIC, SWIFT, EZAG, LSV+)
Analyzed existing payment interfaces and prepared business and technical documentation, including extending the data model
Backend development for online and batch processing
Quality assurance based on the V-model: test coordination, test data, module, integration, and regression testing

Sep 2004 - Oct 2004

2 months

Bad Homburg, Germany

Test Developer (MS .NET)

Internet Service

Creation of test concepts and test scenarios
Development of automated test cases with C#, ASP.NET, VBScript, NUnit
Document reviews
Test execution in C# (IIS, AD, SQL Server, XML, HTTP)
Load testing with Empirix
Planning and conducting performance tests

Aug 2004 - Aug 2004

1 month

Frankfurt, Germany

Project Management / Development Coach

Service Provider

Design of application components
Coaching the development team
Project management
Support with development

Jun 2004 - Jul 2004

2 months

Düsseldorf, Germany

Test Developer (MS .NET)

Internet Service

Creation of test concepts and test scenarios
Development of automated test cases with C# and NUnit
Document reviews
Test execution and bug tracking
Load and performance testing with Empirix

Feb 2004 - Mar 2004

2 months

Düsseldorf, Germany

Fullstack Developer

Association

Expansion of existing data structures
Migration and new development on the .NET platform
Updates to online help
Test planning and execution
Application setup and packaging
User training and support
Administration of networks and operating systems

Oct 2002 - Jul 2003

10 months

Frankfurt, Germany

On-site

Test Developer

Bank

Loan syndication project
Maintenance of existing applications and implementation of functional change requests according to the requirements catalog
Scheduling and organizational manual for integration testing (ISO 9001:2000, V-Model)
Control of test activities, problem and error reporting, audit-compliant test documentation
Coordination with business departments for integration and acceptance testing, including facilities and tranches, consortium shares, cash flows, guarantees, assignments, forfaiting, netting transactions and the cover register

Apr 2002 - Aug 2002

5 months

Düsseldorf, Germany

Fullstack Developer

Association

Extended reporting and user management
Integrated additional queries and stored procedures
Automated update checks
Extended online help
Planned and carried out testing
Set up and packaged the application
Network and system administration

Oct 2001 - Dec 2001

3 months

Düsseldorf, Germany

Fullstack Developer

Association

Extended reporting and data structures
Modified queries and stored procedures
Optimized code for performance
Extended online help
Planned and carried out testing
Set up and packaged the application
Network and system administration

Dec 2000 - Jun 2002

1 year 7 months

Cologne, Germany

On-site

Test Developer

Telecommunication

Ensured the quality of all aspects of a software component
Reviewed code and documentation
Created test plans and concepts
Set up an automated test bed

Sep 2000 - Jun 2001

10 months

Düsseldorf, Germany

On-site

Fullstack Developer

Association

Redesigned the application (3-tier)
Created high-level and detailed concepts and specifications
Designed data structures, queries, and stored procedures
Planned testing phases and put the application into production
Performed module, functional, and integration testing
Migrated data from legacy systems to Access/SQL Server
Managed users, reporting, and data import/export (XML, Excel)
Packaged the application and handled system administration

Feb 2000 - Nov 2000

10 months

Gütersloh, Germany

On-site

Backend Developer

Media Service Provider

Designed and developed interfaces for automated payment data exchange with financial institutions
Developed reports
Managed projects directly with customers and financial institutions

Apr 1999 - Jan 2000

10 months

Frankfurt, Germany

On-site

Backend Developer

Bank

Designed and implemented applications for creating customer and institutional pricing models with history tracking
Accounted for standard and special models, commissions, fees, and tiered pricing

Aug 1998 - Mar 1999

8 months

Düsseldorf, Germany

On-site

Backend Developer

Wholesale

Merchandise management system project (Year 2000 conversion)
Technical analysis of applications, programs, and databases
Implemented changes for the Year 2000

Aug 1997 - Jun 1998

11 months

Düsseldorf, Germany

On-site

Backend Developer

Wholesale

Automated claims processing project
Expanded reporting functionality
Expanded existing interfaces to external systems, including the merchandise management system

Jun 1996 - Sep 1997

1 year 4 months

Düsseldorf, Germany

Fullstack Developer

Service Provider

Developed the Universal Converter project for flexible data conversion and routing
Developed a custom scripting language and parser
Implemented interfaces to existing systems
Client/server architecture with history tracking and restart capabilities
Created custom reports

Apr 1993 - Apr 1995

2 years 1 month

Düsseldorf, Germany

Project Manager

Wholesale

Led a project to automate claims processing using data transmission technologies
Centralized databases and automated error and plausibility checks
Implemented decision logic and documentation of all processes
Interfaces to SAP and the merchandise information system
Created reports and user configurations

Industry experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology, Banking and Finance, Transportation, Retail, Media and Entertainment, and Energy.

Information Technology

Banking and Finance

Transportation

Retail

Media and Entertainment

Energy

Business area experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Product Development, Project Management, Quality Assurance, Customer Service, and Supply Chain Management.

Information Technology

Product Development

Project Management

Quality Assurance

Customer Service

Supply Chain Management

Summary

Senior Fullstack Developer specializing in Microsoft .NET, C# and Angular. IT experience since 1993, self-employed since 1997.

My focus is on established systems: enhancing and modernizing existing applications, replacing legacy systems and moving monolithic architectures to service- or microservice-based structures—with Azure, Docker, Kubernetes and end-to-end CI/CD.

My current focus is Agentic Engineering: designing and implementing agent-based systems, from orchestrating tools to connecting them to existing applications. I also integrate AI into existing .NET environments, connecting language models and retrieval to proprietary data, including fully on-premises environments without a cloud connection.

I work as a freelancer on a service contract basis, mostly remotely, in agile teams and as a technical architect.

Skills

Languages: C#, Typescript, Javascript, T-Sql, Html5, Css/Scss, Powershell (Automation In Development And Deployment Environments), Pl/Sql
.Net: .Net 7–10 And .Net (Core) From Version 2, .Net Framework 1.1–4.8, Asp.Net Core (Web Api, Mvc, Razor), Entity Framework Core, Entity Framework From Version 4, Wcf, Linq, Signalr
Frontend: Angular 4–21, Angular Signals & Effects, Rxjs, Ngrx, Angular Material / Cdk, Microfrontends, Bootstrap / Mdb-Bootstrap, React, Jquery
Databases: Ms Sql Server (All Versions From 2000), Postgresql, Mongodb, Oracle 8–18
Interfaces And Integration: Rest, Openapi / Swagger, Soap / Xml / Xsd, Json, Sap Integration (Soap With Netweaver 7.X, Rest Via Sap Gateway With Odata V2), E-Invoicing (En 16931, Xrechnung, Zugferd)
Messaging And Search: Rabbitmq, Masstransit, Azure Service Bus, Elasticsearch, Kibana
Cloud And Devops: Microsoft Azure (App Service, Aks, Acr, Azure Sql, Keyvault, Service Bus, Signalr, Apim), Docker, Kubernetes, Helm, Azure Devops (Repos And Pipelines), Gitlab Ci/Cd, Github
Application Security: Oauth 2.0 / Openid Connect, Keycloak, Auth0
Agentic Engineering And Ai: Design Of Agent-Based Systems, Model Context Protocol (Mcp), Llm Integration And Tool Orchestration, Retrieval From Proprietary Data, Locally Hosted Models (Ollama), Workflow Automation (N8n)
Testing And Quality: Xunit, Mstest, Nunit, Moq, Jasmine / Jest, Sonarqube, Tdd / Bdd, Code Reviews, Load And Performance Testing
Tools: Visual Studio (2002–2026), Visual Studio Code, Jetbrains Rider, Resharper, Datagrip, Git, Jira, Confluence
Architecture And Methods: Software Architecture, Domain-Driven Design, Microservices, Service-Oriented Architecture (Soa), Clean Code (Solid, Dry, Kiss), Ooa / Ood According To Uml, Data Modeling (Erd), Mvc / Mvvm / Mvp, Scrum, V-Model, Iso 9001:2000
Focus Areas: Modernization Of Established Systems (Redesign, Refactoring, Re-Engineering), Planning And Specifications, Quality Assurance
Earlier Technologies (Up To 2013): Wpf / Xaml, Silverlight, Vb.Net, Visual Basic 6, Opc Da / Xml Da

Languages

German

Native

English

Intermediate

Education

Mar 1993 - May 1993

Düsseldorf Chamber of Skilled Crafts

AdA - Trainer Aptitude Examination · Vocational and Work Education · Germany

Oct 1991 - Mar 1995

DAA Business School Düsseldorf

State-certified Business Administrator, specialization in Business Information Systems · Business Information Systems · Germany

Dec 1986 - Nov 1987

Essen Vocational Training Center

Data Processing Clerk · Organization and Data Technology · Germany

...and 1 more

Certifications & licenses

Master Management with AI (MMAI®)

academy4ai

Statistics

Experience

Total positions 30

Experience in Information Technology 12 y

Avg length 1 y

Longest experience 4 y 7 m

Global experience

Countries worked in 3 (Germany, Switzerland, Liechtenstein)

Primary country Germany

Expertise

Recent roles Senior Fullstack .NET (Core) & Angular Developer, Senior Fullstack Developer .NET (Core) & Azure Developer Associate, Fullstack Developer .NET (Core) & Angular

Main industries Information Technology, Banking and Finance, Transportation

Main business areas Information Technology, Product Development, Project Management

Qualifications

Certifications earned 1

Member since

September 2025

Last update

November 2026

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Frequently asked questions

Have questions? Find more information here.

Andreas is based in Erkrath, Germany and can operate in on-site, hybrid, and remote work models.

Andreas speaks the following languages: German (Native), English (Intermediate).

Andreas has at least 31 years of experience. During this time, Andreas has worked in at least 14 different roles and for 15 different companies. The average length of individual experience is 1 year. Note that Andreas may not have shared all experience and actually has more experience.

Based on recent experience, Andreas would be well-suited for roles such as: Senior Fullstack .NET (Core) & Angular Developer, Senior Fullstack Developer .NET (Core) & Azure Developer Associate, Fullstack Developer .NET (Core) & Angular.

Andreas's most recent position is Senior Fullstack .NET (Core) & Angular Developer at IT Service Provider.

In recent years, Andreas has worked for IT Service Provider, Compliance Management, and Media.

Andreas is most experienced in industries like Information Technology, Banking and Finance, and Transportation. Andreas also has some experience in Retail, Media and Entertainment, and Energy.

Andreas is most experienced in business areas like Information Technology, Product Development, and Quality Assurance. Andreas also has some experience in Project Management, Customer Service, and Supply Chain Management.

Andreas has recently worked in industries like Information Technology and Media and Entertainment.

Andreas has recently worked in business areas like Information Technology, Product Development, and Project Management.

Andreas attended Düsseldorf Chamber of Skilled Crafts for Vocational and Work Education.

Andreas has 1 certificate: Master Management with AI (MMAI®).

Andreas will be available full-time from January 2027.

Daily rate distribution

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Average rates for similar positions

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Daily rate avg. 913 €

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Median rate 960 €

The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.

Calculated based on our freelancers’ daily rates as of 14 Nov 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.