Friedhelm Matten - Freelancer | FHIR Profiling and Validation

Q: Where is Friedhelm based?

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

Q: What languages does Friedhelm speak?

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

Q: How many years of experience does Friedhelm have?

Friedhelm has at least 37 years of experience. During this time, Friedhelm has worked in at least 10 different roles and for 21 different companies . The average length of individual experience is 2 years and 7 months . Note that Friedhelm may not have shared all experience and actually has more experience.

Q: What is Friedhelm's latest experience?

Friedhelm's most recent position is Project at Deutsche Gesetzliche Unfallversicherung .

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

In recent years, Friedhelm has worked for Deutsche Gesetzliche Unfallversicherung , Cloudeatery GmbH / Yobst GmbH , Cash Cow Farmers GmbH , and ISCaD GmbH - Independent Software Consulting and Development .

Q: Which industries is Friedhelm most experienced in?

Friedhelm is most experienced in industries like Information Technology , Professional Services , and Healthcare . Friedhelm also has some experience in Education , Government and Administration , and Agriculture .

Q: Which business areas is Friedhelm most experienced in?

Friedhelm is most experienced in business areas like Information Technology , Product Development , and Business Intelligence . Friedhelm also has some experience in Research and Development , Quality Assurance , and Project Management .

Q: Which industries has Friedhelm worked in recently?

Friedhelm has recently worked in industries like Information Technology , Professional Services , and Agriculture .

Q: Which business areas has Friedhelm worked in recently?

Friedhelm has recently worked in business areas like Information Technology , Product Development , and Business Intelligence .

Recommended expert

Wedemark, Germany

Experience

May 2025 - Nov 2025

7 months

Remote

Project

Deutsche Gesetzliche Unfallversicherung

Collaborated on HL7 FHIR profiling and validation
Created CodableConcepts (code/value systems), extensions and profiles like Composition and Bundle
Extensive instance creation and validation
Used Simplifier.net, Forge and the FHIR Java Validator

Nov 2023 - Oct 2024

1 year

Project

Cloudeatery GmbH / Yobst GmbH

Connected kitchens and online orders via Uber, Wolt and Lieferando
Optimized PostgreSQL database
Built a DevOps infrastructure with WireGuard and GitLab
Extensive Python programming

Jan 2021 - Apr 2025

4 years 4 months

Project

Cash Cow Farmers GmbH

Set up a ZFS-based NAS system with decentralized replication
Configured a Samba server with ACL for macOS, Windows and Linux
Developed analysis and administration applications
Migrated to object storage with MinIO cloud

Jan 2017 - Dec 2020

4 years

Project

Herzzentrum Leipzig

Captured clinical data from HL7 systems (KIS), HLM systems, legacy databases and iMedOne
Set up a MirthConnect server to process HL7 A01–A013 and ORU-R01 messages
Extended with quality assurance data for pediatric cardiology and cardiac surgery
Stored data in HDF5, Redis, Parquet and SQLite
Correlated with patient-related data streams and captured metadata
Developed a web application for automatic control and correction of quality assurance data

Mar 2014 - Oct 2014

8 months

External consultant and shareholder

HealthSafe24 GmbH

Jan 2013 - Feb 2014

1 year 2 months

CIO and shareholder

HealthSafe24 GmbH

Oct 2009 - Mar 2012

2 years 6 months

Hanover, Germany

External IT consultant, software architect/developer

Medizinische Hochschule Hannover

Oct 2007 - Oct 2009

2 years 1 month

Hanover, Germany

Research associate, software architect/developer

Medizinische Hochschule Hannover

Planning and development of a web-based evaluation system for clinical data

Oct 2007 - Mar 2012

4 years 6 months

Project

Niedersächsisches Studieninstitut

Planning and development of an intranet web application for creating and managing online catalogs
Generating print-ready catalogs for a printing company

Dec 2003 - Jan 2009

5 years 2 months

Project

ISCAD GmbH

CDV (Clinical Data View): development of a data structure for managing and analyzing complex clinical data
Migration tool NICOLAI: consolidation of clinical data from subsystems with heterogeneous database structures into the CDV

Jan 2003 - Jun 2006

3 years 6 months

Project

Medical supply store

Planning an online presentation with database integration
Developing an online ordering system and workflow-based order processing
Implementing an online employee management system and a wheelchair management system integrated with health insurance systems
Working with health insurance billing systems

Apr 2000 - Present

26 years

Managing Director and Software Architect

ISCaD GmbH - Independent Software Consulting and Development

Jan 2000 - Dec 2007

8 years

Project

Hanover Region

Development of a CMS and an image database
Setting up various online applications
Transmission and further processing of A01–A013 patient messages and ORU-R01-LIS messages

Dec 1999 - Sep 2000

10 months

Project

Deutsche Telekom AG

Internet portal for an electrical wholesaler on behalf of Deutsche Telekom

Dec 1998 - Dec 2004

6 years 1 month

Project

Association of German Chambers of Industry and Commerce

Implementation of the first German environmental company database on behalf of BUND
Development of further web applications for DIHT Bonn and ITUT Leipzig

Oct 1998 - Nov 1999

1 year 2 months

Project

Informix Deutschland GmbH

Managed a data warehouse
Intranet application using an applet and Swing GUI
Used an Informix database and Sun Directory Server
Web application for online data collection and analysis for children with heart disease

May 1998 - May 2007

9 years 1 month

Managing Director and Software Architect

Phoenix Database Informationstechnologie GmbH

Developed web applications with database connectivity

Sep 1997 - Apr 1998

8 months

Hanover, Germany

IT Consultant, Software/Database Developer, System Administrator

Technologie-Zentrum Hannover GmbH

Consulted and developed in the printing and media sector
System administration

Nov 1996 - Aug 1997

10 months

Duisburg, Germany

IT Consultant, Software/Database Developer

Pageline Layout & Satz GmbH

Consulted and developed in the printing and media sector

Nov 1995 - Oct 1996

1 year

Duisburg, Germany

IT Consultant, Software/Database Developer

Dahmen & Morgenstern

Consulted and developed in the printing and media sector

Oct 1994 - Oct 1995

1 year 1 month

Bad Oeynhausen, Germany

Research Associate

Heart and Diabetes Center NRW

MRI
Software and database development

Dec 1993 - Sep 1994

10 months

Freelance Software Developer

Dec 1988 - Nov 1993

5 years

Research Associate

University of Duisburg-GH

Mathematical methods in physics
Vectorization of Fortran programs
Assembly programming

Industry Experience

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

Experienced in Information Technology, Professional Services, Healthcare, Education, Government and Administration, and Agriculture.

Information Technology

Professional Services

Healthcare

Education

Government and Administration

Agriculture

Business Area Experience

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

Experienced in Information Technology, Product Development, Business Intelligence, Research and Development, Quality Assurance, and Project Management.

Information Technology

Product Development

Business Intelligence

Research and Development

Quality Assurance

Project Management

Summary

Software architect and data analyst with over 30 years of experience in developing, integrating and analyzing complex IT and healthcare data systems. Many years working in clinical and public health settings with a focus on interoperability, data consolidation and quality assurance.

Extensive experience in processing and evaluating structured and unstructured clinical data as well as integrating heterogeneous source systems. Very strong analytical depth due to a solid background in physics and mathematics. Structured, solution-oriented approach with high perseverance and a focus on sustainable, practical solutions.

Skills

Stakeholder Management
Fhir Profiling
Clinical Systems
Data Architecture
Data Analysis
Quality Assurance
Metadata
Migration
Standardization
Healthcare It

Programming Languages

Python
Java
Javascript
Bash

Standards & Interfaces

Hl7 V2
Fhir
Dicom

Databases

Postgresql
Oracle
Mysql
Mssql
Sqlite

Data Formats / Storage

Hdf5
Parquet
Redis

Frameworks & Tools

Mirthconnect
Django
Flask

Devops & Infrastructure

Gitlab
Docker
Proxmox
Vmware
Minio

Operating Systems

Linux (Debian, Ubuntu)
Windows
Macos

Languages

German

Native

English

Intermediate

Education

Oct 1982 - Jun 1989

Gerhard-Mercator-Universität Duisburg

Diploma · Mathematics · Duisburg, Germany · very good

Oct 1980 - Jun 1988

Gerhard-Mercator-Universität Duisburg

Diploma · Physics · Duisburg, Germany · good

Statistics

Experience

Total positions 23

Experience in Information Technology 28.5 y

Avg length 3 y 10 m

Longest experience 25 y 11 m

Global Experience

Countries worked in 1 (Germany)

Primary country Germany

Expertise

Recent roles Project, External consultant and shareholder, CIO and shareholder

Main industries Information Technology, Professional Services, Healthcare

Main business areas Information Technology, Product Development, Business Intelligence

Qualifications

Highest degree Master

Profile

Created

February 2026

Last Update

February 2026

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Friedhelm based?

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

What languages does Friedhelm speak?

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

How many years of experience does Friedhelm have?

Friedhelm has at least 37 years of experience. During this time, Friedhelm has worked in at least 10 different roles and for 21 different companies. The average length of individual experience is 2 years and 7 months. Note that Friedhelm may not have shared all experience and actually has more experience.

What roles would Friedhelm be best suited for?

Based on recent experience, Friedhelm would be well-suited for roles such as: Project, External consultant and shareholder, CIO and shareholder.

What is Friedhelm's latest experience?

Friedhelm's most recent position is Project at Deutsche Gesetzliche Unfallversicherung.

What companies has Friedhelm worked for in recent years?

In recent years, Friedhelm has worked for Deutsche Gesetzliche Unfallversicherung, Cloudeatery GmbH / Yobst GmbH, Cash Cow Farmers GmbH, and ISCaD GmbH - Independent Software Consulting and Development.

Which industries is Friedhelm most experienced in?

Friedhelm is most experienced in industries like Information Technology, Professional Services, and Healthcare. Friedhelm also has some experience in Education, Government and Administration, and Agriculture.

Which business areas is Friedhelm most experienced in?

Friedhelm is most experienced in business areas like Information Technology, Product Development, and Business Intelligence. Friedhelm also has some experience in Research and Development, Quality Assurance, and Project Management.

Which industries has Friedhelm worked in recently?

Friedhelm has recently worked in industries like Information Technology, Professional Services, and Agriculture.

Which business areas has Friedhelm worked in recently?

Friedhelm has recently worked in business areas like Information Technology, Product Development, and Business Intelligence.

What is Friedhelm's education?

Friedhelm holds a Master in Mathematics from Gerhard-Mercator-Universität Duisburg and a Master in Physics from Gerhard-Mercator-Universität Duisburg.

What is the availability of Friedhelm?

Friedhelm is immediately available part-time for suitable projects.

What is the rate of Friedhelm?

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