Thomas Grevenkamp - Senior .NET / Cloud Engineer

Q: Where is Thomas based?

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

Q: What languages does Thomas speak?

Thomas speaks the following languages: German (Native), English (Advanced) .

Q: How many years of experience does Thomas have?

Thomas has at least 15 years of experience. During this time, Thomas has worked in at least 2 different roles and for 1 company . The average length of individual experience is 3 years . Note that Thomas may not have shared all experience and actually has more experience.

Q: What is Thomas's latest experience?

Thomas's most recent position is Senior .NET / Cloud Engineer at Freelance .

Q: What companies has Thomas worked for in recent years?

In recent years, Thomas has worked for Freelance .

Q: Which industries is Thomas most experienced in?

Thomas is most experienced in industries like Information Technology and Utilities .

Q: Which business areas is Thomas most experienced in?

Thomas is most experienced in business areas like Information Technology , Product Development , and Business Intelligence . Thomas also has some experience in Operations .

Q: Which industries has Thomas worked in recently?

Thomas has recently worked in industries like Utilities and Information Technology .

Q: Which business areas has Thomas worked in recently?

Thomas has recently worked in business areas like Information Technology , Product Development , and Operations .

Recommended expert

Dortmund, Germany

Check rate

Experience

Apr 2026 - May 2026

2 months

Remote

Senior .NET / Cloud Engineer

Freelance

Setup of an observability and alerting solution for Business Central job queue monitoring

Set up a centralized monitoring solution to watch the Business Central job queue in a multi-organization environment on Azure DevOps
Integrated Azure Application Insights and Log Analytics for structured capture and analysis of job runtimes and error events
Developed KQL queries for targeted analysis of failed jobs and detection of error patterns
Connected Grafana and Power BI to visualize operational metrics and job status in real time
Implemented an automated alerting workflow with Power Automate – a notification email is sent immediately on job failure
Ensured transparency of the state of productive background processes during live operations

Result: Full transparency over failed Business Central jobs · Significant reduction in response time through automated email alerting · Stable foundation for proactive operation of productive background processes

Mar 2024 - Mar 2026

2 years 1 month

Dortmund, Germany

Senior .NET / Cloud Engineer

Freelance

Migration and modernization of a billing system for e-mobility to Microsoft Dynamics 365 Business Central

Migrated a business-critical Navision solution to Microsoft Dynamics 365 Business Central
Technically enhanced a production billing system in the e-mobility sector
Developed and extended integration interfaces for eRoaming partners (OCPI, OICP)
Analyzed and optimized data-intensive billing processes in SQL Server
Ensured performance, stability, and integration capability in live operations

Result: Successful migration without downtime, significant performance improvement through SQL optimization

Technologies: Business Central (AL), Navision (C/AL), C#, .NET Framework, SQL Server, Azure, Azure DevOps, Azure SQL, TypeScript, AWS, EC2, REST, JSON, XML, OCPI, OICP

Apr 2022 - Dec 2023

1 year 9 months

Dortmund, Germany

Senior .NET / Cloud Engineer

Freelance

Cloud migration and modernization of .NET applications into an AWS multi-account architecture

Migrated existing .NET applications into a scalable AWS target architecture (multi-account/multi-environment)
Built containerized services with Docker
Introduced Infrastructure as Code with Terraform
Developed REST-based and serverless components (AWS Lambda, SQS, SNS)
Set up modern CI/CD pipelines and deployment processes using Azure DevOps

Result: Modernized cloud architecture, improved maintainability, and automated deployments

Technologies: C#, .NET Core, .NET Framework, SQL Server, Azure DevOps, DynamoDB, Docker, Terraform, Entity Framework Core, TypeScript, REST, AWS, EC2, Lambda, SQS, SNS, SES

Nov 2019 - Mar 2022

2 years 5 months

Dortmund, Germany

Senior .NET / Cloud Engineer

Freelance

Design and setup of a billing system for e-mobility based on Microsoft Dynamics Navision

Designed and enhanced a production billing system for charging infrastructure
Implemented robust interfaces to eRoaming partners (OCPI, OICP)
Optimized data-intensive SQL processes and stored procedures
Collaborated closely with business units and IT management

Result: Successful rollout of a production system, high availability despite growing data volumes

Technologies: Navision (C/AL), C#, ASP.NET, .NET Framework, .NET Core, SQL Server, Azure SQL, Azure, Azure DevOps, TypeScript, REST, JSON, XML, OCPI, OICP

Feb 2011 - Sep 2019

8 years 8 months

Dortmund, Germany

Senior .NET / Cloud Engineer & Technical Lead

Freelance

Technical responsibility for backend, data architecture, and operations of a production SmartHome system

Optimized performance, stability, and database processes in live operations
Built and evolved a data warehouse on SQL Server basis (SSIS, SSAS)
Coordinated technically between development, operations, and the client
Migrated central system components to Microsoft Azure

Result: Successful Azure migration, consolidated data warehouse, sustainable performance improvements

Technologies: C#, ASP.NET MVC, .NET Framework, .NET Core, SQL Server, SSIS, SSAS, Azure, Azure DevOps, Angular

Industry Experience

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

Experienced in Information Technology and Utilities.

Information Technology

Utilities

Business Area Experience

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

Experienced in Information Technology, Product Development, and Business Intelligence.

Information Technology

Product Development

Business Intelligence

Summary

Senior .NET / Cloud Engineer with many years of experience in developing, modernizing, and stabilizing business-critical applications. Focus on backend, cloud, and integration solutions in production enterprise environments. Solid experience in the technical advancement of existing systems, migrations, and performance optimization of applications and databases.

Skills

.Net / C#
Asp.Net Core
.Net Core
.Net Framework
Entity Framework Core
Azure
Azure Devops
Azure Sql
Aws
Aws Lambda / Ec2 / Sqs / Sns
Sql Server
Postgresql
Dynamodb
Performance Tuning
Database Optimization
Docker
Terraform
Ci/Cd Pipelines
Infrastructure As Code
Containerization
Rest Apis
Json / Xml
Ocpi / Oicp
Api Integration
Microservices
Typescript
Business Central (Al)
Navision (C/Al)
Erp Migration
Cloud Migration
Ai-Assisted Development

Languages

German

Native

English

Advanced

Statistics

Experience

Total positions 5

Experience in Information Technology 10.5 y

Avg length 2 y 11 m

Longest experience 8 y 7 m

Global Experience

Countries worked in 1 (Germany)

Primary country Germany

Expertise

Recent roles Senior .NET / Cloud Engineer, Senior .NET / Cloud Engineer & Technical Lead

Main industries Information Technology, Utilities

Main business areas Information Technology, Product Development, Business Intelligence

Profile

Created

April 2026

Last Update

May 2026

Need a freelancer? Find your match in seconds.

Try FRATCH GPT

Frequently asked questions

Have questions? Find more information here.

Where is Thomas based?

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

What languages does Thomas speak?

Thomas speaks the following languages: German (Native), English (Advanced).

How many years of experience does Thomas have?

Thomas has at least 15 years of experience. During this time, Thomas has worked in at least 2 different roles and for 1 company. The average length of individual experience is 3 years. Note that Thomas may not have shared all experience and actually has more experience.

What roles would Thomas be best suited for?

Based on recent experience, Thomas would be well-suited for roles such as: Senior .NET / Cloud Engineer, Senior .NET / Cloud Engineer & Technical Lead.

What is Thomas's latest experience?

Thomas's most recent position is Senior .NET / Cloud Engineer at Freelance.

What companies has Thomas worked for in recent years?

In recent years, Thomas has worked for Freelance.

Which industries is Thomas most experienced in?

Thomas is most experienced in industries like Information Technology and Utilities.

Which business areas is Thomas most experienced in?

Thomas is most experienced in business areas like Information Technology, Product Development, and Business Intelligence. Thomas also has some experience in Operations.

Which industries has Thomas worked in recently?

Thomas has recently worked in industries like Utilities and Information Technology.

Which business areas has Thomas worked in recently?

Thomas has recently worked in business areas like Information Technology, Product Development, and Operations.

What is the availability of Thomas?

Thomas is immediately available full-time for suitable projects.

What is the rate of Thomas?

Thomas's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.