Martin Schaefer - Measurement Data Provision via LoRa

Q: Where is Martin based?

Martin is based in Hanover, Germany .

Q: What languages does Martin speak?

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

Q: How many years of experience does Martin have?

Martin has at least 19 years of experience. During this time, Martin has worked in at least 26 different roles and for 18 different companies . The average length of individual experience is 1 year and 6 months . Note that Martin may not have shared all experience and actually has more experience.

Q: What is Martin's latest experience?

Martin's most recent position is MS Fabric Certification .

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

In recent years, Martin has worked for End Customer Project , KfW , Client Migration Project , Savings Banks Finance IT , and End-Customer Projects .

Q: Which industries is Martin most experienced in?

Martin is most experienced in industries like Agriculture , Banking and Finance , and Automotive . Martin also has some experience in Information Technology , Healthcare , and Government and Administration .

Q: Which business areas is Martin most experienced in?

Martin is most experienced in business areas like Information Technology , Business Intelligence , and Research and Development . Martin also has some experience in Quality Assurance , Accounting , and Finance .

Q: Which industries has Martin worked in recently?

Martin has recently worked in industries like Banking and Finance , Information Technology , and Insurance .

Q: Which business areas has Martin worked in recently?

Martin has recently worked in business areas like Information Technology , Business Intelligence , and Quality Assurance .

Recommended expert

Hanover, Germany

Check rate

Experience

Mar 2026 - Present

2 months

Hanover, Germany

Hybrid

MS Fabric Certification

MS Fabric certification with creation of pipelines and notebooks in Fabric using data from Azure, Azure Repos, Azure Boards, and GitHub. Data ingestion via OneLake Explorer, direct IP connection, and API (REST) are the main topics

Sep 2025 - Sep 2025

1 month

Measurement Data Provision via LoRa

End Customer Project

Measurement data provision from LoRa Things Network to PC.
Technologies: Python, Postgres, C#, Eagle

Jun 2025 - Aug 2025

3 months

Frankfurt, Germany

Quality Assurance, Code Review

KfW

Quality assurance and code review for SAS, DB2, VBA, and R.
Internal audit of compliance with documentation and source code standards according to BaFin rules.
Keywords: ISTBQ, MS Office, NIS, DORA, Idgart, Git.

May 2025 - May 2025

1 month

Postgres SQL Training

Instructor-led training.
EDB PostgreSQL administration and performance tuning.
Setting up backup and failover scenarios.

Feb 2025 - Apr 2025

3 months

Software Developer

Client Migration Project

Migration from a Delphi–MS-SQL Windows application to a C# Wisej.NET Azure web application.

Oct 2024 - Dec 2024

3 months

Further Training

ISTQB Foundation Certificate – study and exam.
Python update.

Apr 2024 - Sep 2024

6 months

Frankfurt, Germany

Reporting

Savings Banks Finance IT

Working in the CCR-III area.
Participated in 2 production release packages / go-live events.
Agile development in direct contact with the business unit.
Programming to specification.
Code review of source code from the team.
Responding to tickets for customers (branches) under guidance of specialist colleagues.
Netting packages and risk allocation: merging individual instruments into netting packages under an existing netting framework agreement (go-live: July 2024).
Calculation of RWA (Risk-Weighted Assets) for credit risk using the internal approach based on Probability of Default (PD), Loss Given Default (LGD) and Exposure at Default (EAD) (go-live: Sept. 2024).
Tools: Unix shell, SAS 9.4, MS SQL, DB2, testing with OpenText ALM / OpenText QC, IBM Code Pipeline, WinSCP, Confluence and MS Office.

Jan 2024 - Mar 2024

3 months

Software Developer

End-Customer Projects

Set up Docker files and Hyper-V for development environments.
Gained initial experience with Kubernetes.
Performed maintenance work on Delphi-UniGui.
Renovated the office.

Feb 2023 - Dec 2023

11 months

Frankfurt, Germany

DevOps Engineer and Tester

Deutsche Bank

Assigned to the Infrastructure area.
Mainframe job monitoring / ad-hoc error analysis.
Code review.
Documenting Oracle, VBA and SAS source code.
Version control in Git.
Time-shifted work model with colleagues in Bangalore.
Trainings: Risk Awareness, Anti-Financial Crime, Compliance, Market Participation & Banking Rules, Sanctions Essentials, Market Abuse & Antitrust, Data Protection & Privacy.
Technologies: SAS-9.4-zOS / SAS-PC / PL/I / ISPF / B92 / SFDF / TSO / VBA, Confluence / Office 365 (MS-Access/MS-Excel/MS-Word).

Feb 2022 - Dec 2022

11 months

Munich, Germany

Data-Analyst / Data-Engineer

Bavarian Insurance Chamber

SAS mainframe to SAS BI migration for the Mathematics and Controlling departments.
Conversion of Host-SAS, REX, PL/I programs into SAS-BI stored processes.
Assisted in analyzing existing reports on insurance contracts and cost overviews.
Functional and technical post-documentation of long-running reports in source code and Word, in collaboration with specialist colleagues.
Agile working with Scrum sprints and an iterative approach.
KPI creation around costs and volumes of contract types and insurance categories for private and public health insurance.
Tools: DB2 / SAS / ISPF / PL/I / PowerShell / MS Office / Confluence.

Feb 2021 - Dec 2021

11 months

Frankfurt, Germany

Data Analyst

Commerzbank

Data analysis and reporting using SAS 9.4 and SAS Viya in MS Office and Power BI.
Documentation (EUC / manual).
Simulations for controlling.
Support in defining allocation keys.
KPI and status/ad-hoc reporting.

May 2020 - Dec 2020

8 months

Hanover, Germany

Software Developer

CalRes DV

Redevelopment of a Delphi accounting application in C# and partly in JavaScript using TMS WebCore components.
Data exchange with Tesseract OCR.
Technology: C# (WinForms) / Lazarus / Delphi / TMS WebCore, Oracle 12c / Oracle SQL Developer / Tesseract.

Apr 2019 - Mar 2020

1 year

Eschborn, Germany

Management Reporting

Deutsche Bank

Area of Identity and Access Management.
Documentation of data runs and time windows of data flows.
Creating Oracle VIEWS / MVIEWS and PL/SQL routines for retrieving data from the central data warehouse.
VBA in a PowerPoint report.
Team language is English.
Time-shifted work model with colleagues in Bangalore and London.
Technologies used: SQL, PL/SQL, Oracle 12c / Oracle SQL Developer.

Jul 2017 - Dec 2018

1 year 6 months

Hanover, Germany

Software Developer

Kassenärztliche Vereinigung

Implementing a layer of VIEWS and SYNONYMS as an abstraction layer for exchanging the data model under downstream applications.
Use of VIEWS in Oracle packages and PostgreSQL packages.
Extension of the business view layer (PL/SQL) with data provided from the department data mart.
Project documentation and tracking in JIRA.
Agile development using Scrum methodology.
The Association of Statutory Health Insurance Physicians in Lower Saxony looks after about 40,000 doctors and ensures medical care.
Technologies used: SQL, PL/SQL, Oracle 11g / Oracle 12c / Oracle SQL Developer.

Feb 2017 - Jun 2017

5 months

Time-out / Training

Training in SAS DI / SAS VA reporting / Git / C# / R / Markdown.

Jan 2016 - Jan 2017

1 year 1 month

Frankfurt, Germany

SAS-BI Developer / Documentation Specialist

Commerzbank

Documentation and regulatory-compliant deployment of several SAS-BI program packages.
Creating user documentation for functional testing with HPQC and using the web frontend.
Documentation for business and system developers: developer guide, permission concept, report creation.
Technical HPQC tests and logged deployment of functionally tested programs.
Creation of EUC for the context's reporting system.
Post-documentation of SAS macros.
Technologies used: HPQC, SharePoint, MS Office, EUC database, SAS-BI.

Jul 2015 - Dec 2015

6 months

Frankfurt, Germany

SAS-zOS to SAS-BI Migration Specialist

Commerzbank

Program migration from SAS-zOS to SAS-BI (Unix/Windows).
Integration into new DWH / customization and alternative development.
Testing and further development of a technical template that encapsulates the new system environment.
Adapting about 280 legacy programs and embedding them into the new system template within the team.
Integrating new data from the cross-domain data warehouse / data lake.
Integrating the programs into the stored process web environment.
Targeted delivery of result and runtime reports via email.
Conversion of a VBA / SAS combo application to the new system.
Technologies used: SAS-zOS, SAS-BI, Stored-Process-Server / Workspace-Server, VBA.

Apr 2014 - Jun 2015

1 year 3 months

Wolfsburg, Germany

Database Development

Volkswagen-AG

Database development with zOS-DB2 and Windows MS SQL Server for data delivery to VMware-ITBM and Bissantz DeltaMaster.
Building a zOS-DB2 application that standardizes proportional billing data and delivers it on time.
Porting the application to MS SQL Server, taking into account the import structure for DeltaMaster reporting.
Application documentation with data flow and procedure analysis of the new system.
Support in resolving customer inquiries.
Creating import routines in VMware-ITBM and Excel sheets with SQL statements for database re-import.
Runtime reports for applications using Pacific Systems SMF Writer.
Technologies used: zOS-DB2, JCL, OFTP, BETA92/93, QMF, IBM Data Studio, PL/I, PostgreSQL, MS SQL Server, MS SSIS, MS VBA, DeltaMaster, Perl scripting, Bash, VMware-ITBM, COBOL, Pacific Systems SMF Writer.

May 2012 - Mar 2014

1 year 11 months

Wolfsburg, Germany

Application-Owner / SAS Developer

Volkswagen-AG

Taking over a legacy SAS application and doing post-documentation.
Creating a user manual.
Researching cost drivers, revenue losses, and analyzing causes of bad data.
Technical application documentation with data flow and procedure analysis.
Taking over the SAS accounting system as application owner: ensuring the monthly billing.
Updating the SAS-MXG system to the current version while keeping VW-specific adjustments.
Technologies used: SAS Windows and remote on z/OS, IBM Host on Demand, ISPF, JCL, BETA92/93, PL/I, MS Office, MS Visio, SAS-MXG, OFTP/RVS, DB2 host tools.

Jan 2012 - Mar 2012

3 months

Mönchengladbach, Germany

SAS Data Management / Analyst

Santander Consumer Bank

Creating datasets for statistical analysis.
Data management for the statistics department and ad-hoc evaluations for products and segments.
Frequency and occurrence analyses.
Data integration with verification via Proc Compare using ODS / ODS Trace.
Post-documentation of existing code in source and in MS Office.
Technologies used: SAS Windows and remote on Unix, SSH, SAS macros, MS Office, MS Visio, MS PowerPoint, SQL.

Sep 2011 - Dec 2011

4 months

Mönchengladbach, Germany

SAS Data Management / Key Figure Calculation

Santander Consumer Bank

Calculation of key figures for valuation allowances under HGB and comparison to the corresponding IAS key figures.
Development of macros for the monthly production run for controlling.
Extensive pre-tests on multiple data sources.
Excel VBA frontend for SAS routines and parallel remote processing.
Technologies used: SAS Windows and Renote on Unix, SSH, sasautos routines, and check macros.

Jun 2011 - Aug 2011

3 months

Hanover, Germany

Software Developer / Product Development

CalRes DV

Maintenance and product development of the CalRes SAS-CodeLib (program for managing SAS routines in a multi-user environment).
Integration of statistical routines with MySQL and VFront connection for data exchange on the internet.
Development of CalRes Central (program for data management in occupational and physiotherapy practices - 1st prototype).
Technologies: SAS, C++, Delphi, Oracle.

Feb 2011 - Mar 2011

2 months

Hanover, Germany

Product Development

CalRes DV

CalRes Central: program for data management in occupational and physiotherapy practices - 1st prototype.
Technologies: Delphi, Oracle.

Apr 2010 - Dec 2010

9 months

Heddesheim, Germany

SAS Developer

DASTA-GmbH

Analyses for clinical studies (Kaplan-Meier, risk tables, clinical data sets).
Pharmaceutical reporting.
Technologies: SAS 9.2, SAS/GRAPH/ANNOTATE, Windows, UNIX-AIX.

Feb 2010 - Mar 2010

2 months

Software Developer

Druckerei Görich & Weiershäuser

Conversion of an address management system to UTF-8.
Technologies: Delphi, UTF-8.

Aug 2009 - Dec 2009

5 months

Frankfurt, Germany

Plausibility Checks for Data Ingestion

Commerzbank AG

Plausibility checks (Basel II) during data ingestion with report output in Excel XP tagset.
SAS on z/OS / Excel as the input frontend.
Systematika / Commerzbank.
Technologies: SAS, z/OS, Excel.

May 2009 - Jun 2009

2 months

Hanover, Germany

Product Development

CalRes DV

CalRes – Simulate: Program to generate DataSteps for SAS from an Excel workbook.
Enabled SAS command generation without any macro knowledge.
Technologies: SAS, Delphi ADO, Access, Delphi OLE.

Jan 2009 - Apr 2009

4 months

Braunschweig, Germany

Software Developer

Thünen-Institut

Delphi-based frontend for the SAS project grant evaluation system.
Market analysis at the Thünen Institute.
Technologies: SAS, Delphi, XML, OLE, DevExpress, Zeos, FastReport.

Jun 2008 - Dec 2008

7 months

Braunschweig, Germany

Software Developer

Thünen-Institut

Automated data import system and code management for SAS.
Excel macro to prepare SAS reports.
Mondrian project: OLAP with Mondrian and Firebird for market analysis.
Technologies: SAS, Oracle 10g, Delphi, OLE, Excel VBA, OLAP, Mondrian, Firebird.

Aug 2007 - May 2008

10 months

Braunschweig, Germany

SAS – Statistics and Reporting

Thünen-Institut

Economic indicators / econometric calculations.
Physical calculations / unit conversion.
Project scoring procedures.
Technologies: SAS-Base, SAS Macro, SAS-Connect, XML, SAS-SQL.

Feb 2007 - Jul 2007

6 months

Braunschweig, Germany

Software Developer

Thünen Institute

Management system for project sheets based on Excel with import and export routines for SAS-XML/CSV.
Template management; client/server.
Technologies: DELPHI, DEVEXPRESS, ZEOS, FIREBIRD, POSTGRES, XML.

Dec 2006 - Jan 2007

2 months

Writer / Documentation

Various

No programming.
Writing articles in Word.
Word mail merge letters.

Mar 2006 - Nov 2011

5 years 9 months

Braunschweig, Germany

SAS Developer

Thünen Institute

SAS statistics: regional models with factor, cluster, and variance analyses.
New edition of a survey form: import macro system with XML output.
Excel VBA, CSV import following guidelines of the involved state banks and authorities.
Technologies: SAS-BASE, FORECAST, Excel VBA, XML.

Jan 2006 - Feb 2006

2 months

Braunschweig, Germany

SAS-TemplateSystem Reporting

Thünen Institute

PROC Tabulate / PROC Report.
Getting familiar with EU evaluation regulations.
Technologies: SAS, SAS-BASE.

Jun 2005 - Sep 2005

4 months

Braunschweig, Germany

Web Developer

Thünen Institute

Web development with Mambo (now Joomla).
Creating manuals.
Technologies: Joomla, JS, CSS, MySQL, MS Office.

Industry Experience

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

Experienced in Agriculture, Banking and Finance, Automotive, Information Technology, Healthcare, and Government and Administration.

Agriculture

Banking and Finance

Automotive

Information Technology

Healthcare

Government and Administration

Business Area Experience

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

Experienced in Information Technology, Business Intelligence, Research and Development, Quality Assurance, Finance, and Accounting.

Information Technology

Business Intelligence

Research and Development

Quality Assurance

Finance

Accounting

Summary

Nearly twenty years of experience transitioning I have from public administration to the private sector, working in data management, KPI reporting, and software development. There is deep expertise in technical documentation and agile methodologies while being comfortable working with international teams.

I have successfully handled complex tasks using technologies like Python, C#, Delphi, and SAS in Finance, Automitive and Insurance. My work consistently delivers clear and reliable solutions by transforming data processes and adapting to varied industry needs including documentaion an presentation.

kind regards

Martin Schaefer

Skills

Technical Documentation Development, Project Reporting, Quality Control
Sas, Rex, Pl/i, Vba, Delphi, C++, Python, R
Sas Macro, Sql, Xml, Xbrl, Powershell, Bash, Jcl, Perl, Fortran
Sas 9.4, Viya, Ms-sql T-sql, Ms Access, Mysql, Db2, Postgres, Oracle, Sqlite, Firebird
Excel, Access [Vba], Power Bi 2020 [Dax], Linear Optimization, Skr03, Kpi, Kci
Opentext (Formerly Hp), Opentext Alm, Opentext Qc, Opentext™ Alm Octane
Tso, Ispf, Tso Beta92, Tso Beta93, Tso Rvs
File Management, Log Manager, Output Management, File Transfer
Jcl Iebgener, Jcl Dsntiaul, Jcl Dfsort, Jcl Rex
Xinfo, Twgraph, Jcl Iebcopy, Pacific-smf Writer
Sas 9.4 Foundation, Sas Enterprise Guide, Sas Viya, Sas Mxg, Sas Stat, Sas Access, Proc Report, Proc Sql, Datastep
Qmf Z/os, Qmf Win, Db2 Admin, Data Studio, Db2 Load Utility, Db2 Unload
Pgadmin, Pgdash (Monitoring), Pgmodeller
Visual Studio, Ms Project, Ms Office, Ms Sql Server Management Studio, Ms Visio, Power Bi, Azure, Powershell
Oracle Sql Developer, Oracle Virtualbox
Opentext Alm, Opentext Qc, Opentext™ Alm Octane
Github, Git, Svn
Python, Delphi, Ollama, Zeta Producer, Inno Setup
Embedded Development With Msp430 And Arduino Iot
Using Oscilloscopes, Measurement Devices, Frequency Generators, Volterra V-one, Soldering Station
Controls With Miac And Controllino
Knowledge In C, Flowcode, Codesys

Languages

German

Native

English

Advanced

Education

Dr. rer. hort., Production Horticulture with specialization · Production Horticulture

Certifications & licenses

ISTBQ Foundation Certificate

ISTBQ Foundation Tester

Postgres Specialist

SAS Advanced Programmer

SAS Certified

Statistics

Experience

Total positions 35

Experience in Agriculture 6 y

Avg length 7 m

Longest experience 5 y 8 m

Global Experience

Countries worked in 1 (Germany)

Primary country Germany

Expertise

Recent roles MS Fabric Certification, Measurement Data Provision via LoRa, Quality Assurance, Code Review

Main industries Agriculture, Banking and Finance, Automotive

Main business areas Information Technology, Business Intelligence, Research and Development

Qualifications

Highest degree Doctorate

Certifications earned 5

Profile

Created

July 2025

Last Update

March 2026

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Frequently asked questions

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

Where is Martin based?

Martin is based in Hanover, Germany.

What languages does Martin speak?

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

How many years of experience does Martin have?

Martin has at least 19 years of experience. During this time, Martin has worked in at least 26 different roles and for 18 different companies. The average length of individual experience is 1 year and 6 months. Note that Martin may not have shared all experience and actually has more experience.

What roles would Martin be best suited for?

Based on recent experience, Martin would be well-suited for roles such as: MS Fabric Certification, Measurement Data Provision via LoRa, Quality Assurance, Code Review.

What is Martin's latest experience?

Martin's most recent position is MS Fabric Certification.

What companies has Martin worked for in recent years?

In recent years, Martin has worked for End Customer Project, KfW, Client Migration Project, Savings Banks Finance IT, and End-Customer Projects.

Which industries is Martin most experienced in?

Martin is most experienced in industries like Agriculture, Banking and Finance, and Automotive. Martin also has some experience in Information Technology, Healthcare, and Government and Administration.

Which business areas is Martin most experienced in?

Martin is most experienced in business areas like Information Technology, Business Intelligence, and Research and Development. Martin also has some experience in Quality Assurance, Accounting, and Finance.

Which industries has Martin worked in recently?

Martin has recently worked in industries like Banking and Finance, Information Technology, and Insurance.

Which business areas has Martin worked in recently?

Martin has recently worked in business areas like Information Technology, Business Intelligence, and Quality Assurance.

What is Martin's education?

Martin holds a Doctorate in Production Horticulture.

Does Martin have any certificates?

Martin has 5 certificates. Among them, these include: ISTBQ Foundation Certificate, ISTBQ Foundation Tester, and Postgres Specialist.

What is the availability of Martin?

Martin is immediately available full-time for suitable projects.

What is the rate of Martin?

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