Matthias O.-Freelance work
Check rate
Experience
Freelance work
Etengo (für Syna AG)
Consulting in the SAP EAM module as part of the migration to EON's S/4 HANA oneERP system
Review and cost estimation of customer-specific developments (e.g. cockpit for EAM orders, document flow display)
Preparation of EAM classification data for technical objects (functional locations, equipment) for migration to new classes
Freelance work
SThree (für Aareon GmbH)
Delivery of SAP ABAP software to various Aareon customers in the real estate sector
Adaptation of heating cost statements to the requirements of the HKVO Heating Cost Ordinance
Support for customers on S/4 HANA and earlier release levels
Freelance work
Hays (für Natuvion GmbH bei Sachsenenergie)
Organization of complex data transformations and migrations from two SAP ECC systems into one S/4 HANA system
Use of the PM, MM and FI modules
Participant in SAP topic seminars
Open.sap.com
SAP PLM in the process industry (with examinations)
Espresso Tutorials: Authorization management (Fiori apps, transactions); Fiori app error handling; CDS views; SAP EAM PM; SAP Build (apps)
Participant in SAP topic seminars
Open.sap.com
Adapting UI in S/4 HANA Cloud using Screen Personas (with examinations)
BlockChain Technology – Introduction and use in Business and other areas (with examinations)
Insights into Selected Logistic innovations in SAP S4HANA (with examinations)
New Employee Business Partner Model SAP S4HANA (with examinations)
Freelance Work
CSE Consulting GmbH
Consulting in SAP MM Purchasing: Fiori apps for purchase requisitions
Interface concept: Transfer of material data from an external system and assignment of EAN numbers
Freelance Work
iPAXX AG (for Aareon Deutschland GmbH)
SAP ERP work area BK01 for payment management at Aarealbank
Data exchange and processing of payment requests between SAP ERP systems, AEPP, and customer apps (CRM) via Swagger Data Portal (OpenAPI) based on HTTP protocols
Participant in SAP Topic Seminar
Open.sap.com
- Developing and Extending SAP Fiori Elements Apps (with exams)
Participant in SAP Topic Seminar
Open.sap.com
- Key Functional Topics in a System Conversion to SAP S4HANA (with exams)
Freelance Work
ECBM AG (for ONYX POWER)
Data migration in the SAP PM and MM areas to a MAXIMO IT system and an SAP Business ByDesign system
Use of agile project strategies and interface connections between both systems
Participant in SAP Topic Seminars
Open.sap.com
SAP S/4 HANA Migration Cockpit (with exams)
SAP Fiori Overview Design, Develop and Deploy (with exams)
Building Apps with the ABAP RESTful Application Programming Model (with exams)
SAP Learning Hub Trainings: HA400 ABAP S4/HANA; D75AW ABAP DELTA to 751; S4D430 CDS-Views; S4D440 Customer Code Adaption to ABAP S4/HANA; SAP Fiori UX100 Fiori Foundation
Freelance Work
HAYS AG (for Syna GmbH)
Creating OData services in the PM area (ABAP OO 7.50)
Developing CDS views and JSON formats for the MIA app frontend
Agile project strategies: Bidirectional data exchange between the frontend and SAP backend
Participant in SAP Training
HAYS AG
- GW100 SAP Gateway – Creating OData Services
Participant in SAP Training
HAYS AG
- HA400 ABAP Programming for SAP HANA
Freelance Work
HAYS AG (for Vattenfall Europe Information Services GmbH)
Migration of PM data, MM material master data, QM notifications, PP bills of material, PP routings, and technical objects as part of a carve-out
Use of ABAP OO, BAPIs, RFC function modules, and LSMWs
Complex ABAP OO programming for a service provider portal with data uploads from Excel
SAP Training Participant
HAYS AG
- HA150 SAP SQLScript
Freelance Work
ETENGO GmbH (for ista International GmbH)
Complex custom ABAP OO programming in the PM module in the context of real estate and energy management (ABAP 7.30)
Use of the Eclipse Workbench for ABAP development
Agile work strategies: Scrum, Test-Driven Development
Freelance Work
People4Project GmbH (for COMLINE AG, TLG AG)
Interface programming in the RE-FX module (ABAP 7.50, SAP HANA)
Migration of customer data from external systems into SAP systems: RE-FX, MM purchase orders, including additional fields
FI development in FI-AA (additions, depreciation) and operating costs
Processing files to prepare the consolidated financial statements
Freelance Work
HAYS AG (for Vonovia AG)
Complex ABAP OO programming in the PM module (ABAP 7.50)
Development of a cockpit for maintenance orders with SALV display
Functions: conversion into in-house/external orders, mass planning, release with creation of MM purchase requisitions and purchase orders
SAP Training Participant
- SAP HANA Introduction
Freelance Consultant
Ratbacher GmbH (für Springer Media)
ABAP OO programming and customer-specific developments in the FI module (ABAP 7.31)
Implementation of interfaces
Testing Driven Development
Freelance Consultant
PROMOS Consult GmbH (für Vonovia AG)
ABAP programming and support in the PM and MM modules
Development of complex customer-specific solutions
Freelance Consultant
Mercoline AG
ABAP programming in the MM module
Interface programming
Creating and changing master and transactional data in MM, SD, and PP using BAPIs and SALV classes
Error display using ALV
Freelance Consultant
RSP AG (für 50Hertz AG)
ABAP programming in the PM module (ECC 6.0)
Complex programming with user exits, enhancements, and BADIs
Automated creation of MM purchase requisitions and purchase orders from PM orders
Freelance Consultant
Mercoline AG (für Bundesdruckerei und andere)
ABAP programming in the QM module (ECC 6.0)
Development of QM notification activities: creating credit memo requests and CO internal orders via dynpros
ABAP programming in MM, SD, and FI
Freelance work
SAG
ABAP programming in the CO module (ECC 6.0)
Enhancement of a monitor for planned and actual costs of WBS elements to include Easy Cost Planning (ECP)
Editable ALV display for planned cost amounts by cost type and period
Freelance work
Volkswagen AG
ABAP programming in MM, WM (ECC 6.0)
New development of an inventory monitor with customer-specific adjustments to standard transactions
Freelance work
Deutsche Bahn AG
ABAP programming in the PM module (ECC 6.0)
Rescheduling of maintenance plans via batch input
Development of interfaces to the frontend and application server
Freelance work
Deutsche Bahn AG
ABAP/ABAP OO programming in PM, SD, CS (ECC 6.0)
Adjustment of status flows in CS notifications via UserExits and FuBas
Interface development for generating and sending CS orders
SALV grids for technical objects with UserExit-based editability
Freelance work
SIEMENS AG
ABAP/ABAP OO programming in QM, PS (ECC 6.0)
SCM QM oneP Project: Data selection and display of complex equipment via ALV, generation of SmartForms PDFs
QM notification programming with SALV tree controls for causes and actions
Enhancement/UserExit programming to control the creation of inspection lots at goods receipt
PS oneP Project: Data display for network plans and standard plans using SALV classes and validation logic
Freelance work
BAYER AG
ABAP OO programming in WM, MM, SD (ECC 6.0)
Enhancement/UserExit for optimized material putaway, taking Customizing into account
Classes, methods and enhancements for quantity conversion in stock transport orders
Adjustment of transaction VA01 for characteristic proposals in variant configuration
Freelance work
ARVATO Systems
Support and programming for an SD add-on for forwarding orders (ECC 6.0)
Menu improvements and distance calculation via Customizing
Adjustments for freight cost document processing (transaction VI02) via User-Exits for Vattenfall
Freelance work
FIDUCIA AG
ABAP OO, EDI-/ALE-, BAPI- and Batch Input programming in MM, SD, FI (ECC 6.0)
Extension of IDOC structures, BAPI and Batch Input integration
ALV report programming for depreciation and accruals
SAPScript form development and adjustment of order creation (agreeNet project)
Freelance work
Ferrero GmbH
ABAP OO programming in the QM module (ERP 2005, ECC 6.0)
Processing of analysis certificates as PDFs into SAP documents with BAPIs
Modification of table controls for horizontal scrolling and new displays for inspection result evaluations
Development of a transaction for sample registration with ALV controls and double-click functionality
Collective inspection lots with Excel OLE export/import and BAPI integration
XI proxy programming for data exchange with external laboratories
Mass processing and ALV lists for inspection lot results
Freelance work
WincorNixdorf AG / TMI AG
Dialog programming in the retail sector (ERP 2005, ECC 6.0)
Data model in the Data Dictionary (tables, maintenance views, validations)
Complex dialog programs for merchandise usage and exchange plans with ABAP OO and dynamic ALV grids
Freelance Consultant
FIDUCIA AG
Upgrade from 46C to ERP 2005 (ECC 6.0)
Conversion from batch inputs to BAPIs in SD, SCM, PLM, FI with monitoring
Performance optimization and use of SAP Enjoy Controls
Improvement of file interfaces and Unicode adjustments
Freelance Consultant
Groupe DANONE
ABAP programming in PP, MM, SD, WM (ECC 6.0)
Reporting and reconciliation of inventory data using ALV Controls
Performance optimization through table indexes
Dialog programming with SAP Enjoy Controls and Customer Exits
Mass updates of PP orders via batch input
Freelance Consultant
Siemens France SA
Programming in the PS Project System: data retrieval and ALV Grid/Tree display for projects and subprojects
Programming in CS Customer Service: interface for notification tasks via batch input and file archiving
Freelance Consultant
Fresenius Netcare GmbH
ALE (IDOCs) and interface programming in an SAP scenario between healthcare institutions and health insurers
Inbound IDOC processing and outbound message control with ABAP OO and Application Log
Freelance Consultant
Element System GmbH
Inventory controlling reporting with ALV Grid Controls
Provision of key figures via LIS, data conversion in ABAP Memory
Event handling and hotspot mechanism in ALV
Freelance Work
SAP System Integrations AG (for Forschungszentrum Jülich)
Interface programming in MM for migration from R/2 to R/3 4.7 via BAPIs
Reporting in CO, MM, FI using SAP Enjoy Controls and object-oriented methods
Transferring data to local PC directories
Training Participant
Cimdata GmbH
JavaScript: Dynamic websites, forms, pop-ups
HTML: Website design, tables, CSS, hyperlinks
SAP Certification Participant
Siemens Business Services GmbH & Co. OHG
ABAP Objects Developer: Specialist Software Development ABAP Objects
Topics: Data Dictionary, reporting, dialog programming, BAPIs, SAP Enjoy Controls, customer exits, BADIs, basic UML knowledge
Training Participant
Cimdata GmbH
Java: Servlets, network programming, threads, JDBC, Swing
C++: Basics, object-oriented programming
SAP Consultant/Developer
Hewlett Packard
ABAP developments for interfaces to external servers using UNIX scripts
Selection and uploading of material master data for web-based inventory overviews
SAP Consultant/Developer
Raiffeisen-Banken Schweiz
- Reporting in the MM and SD modules
SAP Consultant/Developer
Swisscom
Concept and partial project management for the selection of material master data
Uploading the data with LSMW
SAP Consultant/Developer
Hewlett Packard
Release upgrade from 40B to 46C
Support for SD, MM, PP: IDOC processing, monitoring, troubleshooting
SAP Consultant/Developer
CLARIANT
Programming and maintenance of customer-specific MM programs (goods receipt)
Reporting in MM (reservations, inventory management)
Development of Customer Exits, Field Exits and Batch Inputs
IDOC processing in SD and support during the release upgrade 30F–46B
SAP Consultant Training
Siemens Business Services GmbH & Co. OHG
- Certification as an SAP R/3 Consultant in the MM module and logistics training
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology, Real Estate, Banking and Finance, Chemical, Utilities, and Energy.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Supply Chain Management, Procurement, Finance, Product Development, and Operations.
Skills
Overview Of Sap Experience:
- Abap Oo (Sap Certification)
- Abap 7.5x
- Odata Services
- Json Formats
- S/4hana
- Cds Views Abap
- Sap Controls (Alv Ida, Salv, Alv)
- Sap Fiori Apps
- Sap Odata Services
- Sap S/4 Hana Migration Cockpit
- Bapis
- Interface Programming
- Data Migrations (Including Preparation And Loading Of Material Masters)
- Forms (Sapscript, Smartforms, Sap Adobe Forms)
- Modifications And Sap Enhancements (Badis, User-Exits, Etc.)
- Ale And Edi (Programming, Idoc Processing And Monitoring)
- Modules Scm, Ps, Mm, Sd, Plm, Cs, Fi, Co, Qm, Pm And Sap Eam
- Knowledge Of Pp
- Sap Security And Authorization Management (Fiori Apps, Transactions)
- Customizing And Sap Support
- Sap Jobs (Scheduling And Monitoring)
- Several Release Upgrades
Programming Languages:
- Abap Oo
- Abap 7.5x
Operating Systems:
- Windows 11
Databases:
- S/4 Hana
Languages
Education
Technische Fachhochschule Berlin
Diplom-Wirtschaftsingenieur · Industrial Engineering · Berlin, Germany
Max-Planck-Institut Stuttgart
Promotion · Stuttgart, Germany
Gymnasium
Allgemeine Hochschulreife · Germany
Certifications & licenses
ABAP Objects Developer
Siemens Business Services GmbH & Co. OHG
SAP R/3-Berater Für Das Modul MM
Siemens Business Services GmbH & Co. OHG
Statistics
Experience
Expertise
Qualifications
Frequently asked questions
Have questions? Find more information here.
Matthias is based in Berlin, Germany and can operate in on-site, hybrid, and remote work models.
Matthias speaks the following languages: German (Native), English (Advanced).
Matthias has at least 21 years of experience. During this time, Matthias has worked in at least 12 different roles and for 38 different companies. The average length of individual experience is 5 months. Note that Matthias may not have shared all experience and actually has more experience.
Based on recent experience, Matthias would be well-suited for roles such as: Freelance work, Participant in SAP topic seminars, Freelance Work.
Matthias's most recent position is Freelance work at Etengo (für Syna AG).
In recent years, Matthias has worked for Etengo (für Syna AG), SThree (für Aareon GmbH), Hays (für Natuvion GmbH bei Sachsenenergie), Open.sap.com, and CSE Consulting GmbH.
Matthias is most experienced in industries like Information Technology, Chemical, and Real Estate. Matthias also has some experience in Banking and Finance, Energy, and Professional Services.
Matthias is most experienced in business areas like Information Technology, Supply Chain Management, and Procurement. Matthias also has some experience in Finance, Product Development, and Logistics.
Matthias has recently worked in industries like Professional Services, Banking and Finance, and Utilities.
Matthias has recently worked in business areas like Information Technology, Procurement, and Finance.
Matthias holds a Doctorate from Max-Planck-Institut Stuttgart, a Master in Chemistry from Universität Stuttgart and a Bachelor in Industrial Engineering from Technische Fachhochschule Berlin.
Matthias has 2 certificates. These include: ABAP Objects Developer and SAP R/3-Berater Für Das Modul MM.
Matthias is immediately available full-time for suitable projects.
Daily rate distribution
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Average rates for similar positions
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
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 6 Nov 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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