Weka Experts in Germany
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Meet FRATCH Experts in Germany, who have recently used Weka
Kai P.
Last position:
Oracle Project Management and DBA at Scope Solutions AG
PROFILE Senior Oracle specialist, consultant and DBA with many years of experience in planning, architecture, installation, migration, operations, performance tuning and troubleshooting of large Oracle database environments. Focus on Oracle Database 19c and enterprise architectures with RAC, Active Data Guard, Golden Gate, Exadata, RMAN and CDB/PDB. Experience in heterogeneous enterprise environments on Linux, AIX, Solaris, HP-UX and Windows, as well as in cloud and migration projects. Over many years, worked as a technical consultant, DBA, architect and project manager for banks, insurers, energy providers, public institutions, industry, automotive and aviation. Combining technical Oracle expertise with operations concepts, migration, project planning, documentation and customer consulting.
ORACLE FOCUS AREAS
- Oracle Database 19c – installation, upgrade, patch/RU management, operations and troubleshooting
- Oracle Database 21c / 23ai / 26ai – knowledge of current Oracle release lines
- Oracle RAC, Active Data Guard, Data Guard, Oracle GoldenGate
- CDB / PDB, multitenant architectures and enterprise database operations
- Oracle Exadata and highly available database environments
- RMAN – backup, restore, recovery, migration and disaster recovery scenarios
- Data Pump (EXPDP / IMPDP), Transportable Tablespaces (TTS) and database-based migrations
- Performance analysis, SQL / PL/SQL, tuning, troubleshooting and capacity planning
- Oracle Enterprise Manager / monitoring and technical operational support
- Oracle Security: Wallet, TDE, Database Vault, VPD / RLS
- Oracle DWH / BI: OBIEE, ODI, OWB and Discoverer
- Oracle Applications / E-Business Suite and Oracle-based application environments
CURRENT PROJECTS
Scope Solutions AG, Basel / CH | 08/2023 – ongoing Oracle Project Management and DBA
- Installation, maintenance and regular upgrades of Oracle database systems with a focus on Oracle 19c.
- Patch and release management including OPatch and Release Updates; operations on RHEL 8.x, SLES 15.x and Windows.
- DBA support for customers in DACH and Europe and support of production, load test and other CDB/PDB environments.
- Technical operating processes and documentation via Confluence; support and service requests via My Oracle Support / Metalink.
Federal Employment Agency, Nuremberg | 04/2022 – 10/2023 Oracle Operations Support / DBA
- Operations and regular upgrades of Oracle-19c database systems on SLES 15.x.
- DBA for around 2,100 PDBs on RAC and Exadata in production, integration, load test and other environments.
- Configuration management via ARS Remedy; workflows and technical documentation via Jira and Confluence.
- Operations support and processing of service requests via My Oracle Support / Metalink.
Federal Statistical Office, Wiesbaden | 09/2021 – 03/2022 Oracle Operations and Architecture – 2022 Survey
- Merging data into a central Oracle-19c database system.
- Design of import/export procedures for the central data structure.
- KPI and performance architecture for analyses.
- Training employees in Oracle performance and DBA topics.
E.ON Digital Technology, Landshut / KKI | 03/2019 – 12/2021 Oracle Operations, Architecture and DBA
- Patch concepts, technical documentation, installation, database administration and operations of Oracle 12c/19c.
- AIX 7.x, LPAR administration including VIO server and software distribution with NIM.
- Performance monitoring and monitoring.
- Backup and restore with TSM / IBM Spectrum Protect and Oracle RMAN.
- Installation of Enterprise Manager 13c with WebLogic Server 12.1x; employee training.
KaPe Munich – various end customers in DACH / Europe | ongoing / various projects Oracle DBA, architecture, migration, DWH consulting and project management
- Many years of consulting and operational DBA work in various Oracle architectures.
- DWH/CRM platforms: planning, analysis, performance and tuning, as well as business analysis.
- RAC, Data Guard, Transportable Tablespaces, RMAN and Oracle 11g/12c in enterprise environments.
- Customer projects including Burda, Deka, E.ON, Otto Group and Augsburger Allgemeine.
AXA, Germany / Europe | 09/2018 – 02/2019 Oracle DB Operations and Migration – Cloud Architectures
- Planning, methodology and execution of Oracle database migrations to IBM Private Cloud / Spectrum and AWS Public Cloud.
- Creation of Oracle databases in the cloud with SLES and Terraform templates.
- Technical architecture work and cloud KPIs.
RWE / SÜWAG / Syna, Germany | 07/2016 – 09/2018 Oracle DB Migrations 11g/12c and Project Management
- Design, planning and execution of Oracle database migrations 11g → 12c with platform and architecture changes.
- Windows Server 2012/2016 and setup and migration of Enterprise Manager/WebLogic-based monitoring environments.
- Use of Data Guard, TTS, EXPDP/IMPDP and RMAN based on analysis of application requirements.
- Performance and tuning for Oracle 11g/12c.
MTU Aero Engines, Munich | 01/2016 – 03/2017 Oracle DBA / Requirements Engineer
- Operations and development of Oracle 11g/12c databases and application workflows.
- Interfaces to SAP via BAPI.
- Design and management of APPS modules with Visual Basic / Visual Studio and PL/SQL; version control with SVN.
UBIS (HVB), Munich | 04/2012 – 08/2015 Oracle Operations, Architecture, DBA and Project Management
- Oracle-based operations and migration of MUREX and Sophis trading platforms.
- Oracle Security, Wallet, Tablespaces, RAC, Data Guard, Database Vault, GoldenGate and DWH.
- Project management for Oracle DWH migrations and release changes from 10g to 11gR2.
- Migration OWB 11gR2 → ODI 12c and introduction of Oracle Database 12c.
- Platforms: Red Hat, AIX and Solaris.
WWK Deutschland a.G., Munich | 09/2010 – 03/2012 Oracle DB and HP-UX → Linux Migration
- Architecture, planning, operations concept and migration of 104 databases from an HP-UX cluster to Red Hat Linux.
- Single Instance with Veritas Cluster and 2-node RAC 11.2.0.2; four Data Guard databases.
- Project management for OWB/DWH migrations (>1 TB), including tuning, PL/SQL, mappings and metadata.
Allianz Deutschland, ACAS Stuttgart | 03/2010 – 09/2010 Technical DWH Project Manager
- DWH project for processing European ETL data sources.
- Business analysis and requirements management for automated loading processes.
- OWB, PL/SQL, SQL*Loader, Oracle Advanced Security / TDE, Oracle BI and Database Vault.
NETMA, Munich-Taufkirchen | 08/2007 – 02/2010 Oracle Specialist and DBA for Oracle Applications 11i
- Operations of Oracle 9i/10g and Oracle Applications 11.5.10.
- Design and development of APPS modules with PL/SQL and SVN.
- Oracle RAC, Enterprise Manager, Oracle Application Server and migration tests.
- Platforms: AIX, SLES, Windows and HP-UX.
BT Germany, Munich | 11/2007 – 04/2008 Oracle DB Migration
- Migration from Oracle 8i to 10gR2 in a Solaris cluster environment.
- Preparing offers, project planning and process planning.
Itellium (KQ), Nuremberg | 02/2007 – 08/2007 Oracle DWH Specialist
- Design and analysis of a DWH focusing on master data and logistics.
- Oracle Designer, OWB, Oracle Database, ETL, PL/SQL and External Tables; data volumes up to approx. 5 TB.
Oracle Deutschland GmbH, Munich | 10/2006 – 02/2007 and further assignments Oracle Specialist / Consultant – Data Migration and DWH
- Consulting for customers such as Volkswagen, GE Money Bank, WeKa, KSB, Swisscom and British Telecom.
- Migration Discoverer EUL4 → EUL5i, database optimization, Data Guard and web/database analysis.
- Performance and tuning on Solaris and Linux.
HaSpa, Hamburg | 07/2006 – 10/2006 Oracle Specialist / Consultant – Data Migration and DWH
- Setup of an Oracle-10gR2 environment for banking applications.
- Data transfer from DB2 / OS390, architecture, sizing, tuning and performance.
- Data preparation and integration with OWB.
AUDI, Ingolstadt | 02/2005 – 06/2006 Oracle Consultant and DBA
- Operations, installation and maintenance of Oracle 9i/10g and IAS 10g.
- RMAN, Oracle RLS, Oracle HTMLDB, Veritas Cluster, Solaris and AIX / HACMP.
- Database cloning and migration 9i → 10g; approx. 200 systems up to 4.5 TB.
Photocolor, Kreuzlingen / CH | 11/2003 – 01/2005 Project Manager / Oracle
- Implementation, configuration, technical support and acceptance of an Oracle ERP/CRM solution.
- Oracle Applications, Oracle 9i, Solaris, HP-UX, OWB and Mercury TestDirector.
- Project scope approx. 2 TB; reporting to management.
ZPD NRW, Duisburg | 05/2003 – 10/2003 Oracle Consultant
- Consulting, PL/SQL training and project planning for a nationwide Oracle Forms integration.
- Oracle on HP Superdome / HP-UX; data volume 1.2 → 2.5 TB, sizing up to 5 TB.
Messe München GmbH | 11/2002 – 05/2003 Project Manager / Oracle
- MIS/DWH solution with OWB, Discoverer, Oracle 11i / 9i and RAC.
- Architecture, design, integration, troubleshooting and consulting for data volumes of 1.5–2 TB.
Aria SA Integration, Geneva / CH | 09/2002 – 11/2002 Oracle DBA and Consultant
- Oracle 8.1.7.4 / 9i; merging the Stuttgart and Geneva databases via replication.
Narges D.
Last position:
Research Assistant at Hochschule München
Introduced an integrated approach for structural damage detection across concrete, steel, and glass using advanced technologies such as LiDAR and thermal imaging. Highlighted cross-material interactions to enhance diagnostics and enable predictive maintenance.
Developed an NLP-based medical note simplifier that transforms complex clinical instructions into plain, child-level English. Applied prompt engineering with Flan-T5 transformer models to extract patient-relevant actions and rephrase them into clear to-do items. Built dual Flask and Tornado backends with a printable web interface.
David R.
Last position:
Lead Developer/Technical Architect
- Design, extension, and implementation of interfaces (REST, GraphQL, Kafka)
- Architecture and implementation of cloud-native microservices on Azure Kubernetes Service
- Domain-Driven Design, Event-Driven Architecture with Kafka
- Development of an extensive query engine for REST endpoints based on business objects
- Design and implementation of master data classification using machine learning algorithms (Weka library, Spotify Voyager)
- Analysis and evaluation of complex load test scenarios and derivation of optimizations
- Increase in system resilience (Kafka error handling, circuit breaker, sidecar service mesh in Go)
- Integration with CIAM systems (asynchronous real-time synchronization and definition of data ownership, authorization, authentication)
- Connection to Azure ServiceBus (AMQP protocol)
- Design and implementation of complex authorization concepts (including delegated administration)
- Documentation of the results (Confluence, architecture descriptions, architecture decisions)
Christian S.
Last position:
Data-Scientist/AI Engineer at The Marcom Engine GmbH & Co. KG
- Concept creation and implementing AI Agents in AWS Cloud
- Continuously alignment with stakeholders
- Collaborate with DevOps
- Technologies: Git, CI/CD (GitHub Actions), Python/ML, Streamlit, Deno/typescript, AWS SAM, AWS Bedrock, AWS Lambda, AWS Dynamo DB, AWS S3, AWS Event Bridge etc.
Nooshin O.
Last position:
Senior Computational Biologist at Max-Planck-Institute for Molecular Genetics
- Conducting research at the interface of proteomics and artificial intelligence, focusing on the application of machine learning models (e.g., neural networks, clustering algorithms, and feature extraction) to analyze complex biological datasets.
- Developing and teaching AI-based analytical workflows for molecular and proteomic data, integrating tools such as Python (scikit-learn, TensorFlow, Pandas) for predictive modeling and data visualization.
- Collaborating with interdisciplinary teams to explore data-driven hypotheses in molecular genetics and enhance biological interpretation through AI-assisted pattern recognition.
- Implementing automated data processing pipelines to improve reproducibility and FAIR data management in high-throughput experiments.
Matti L.
Last position:
FullStack Developer at Ing DiBa GmbH
- Developed and extended Fiori UI5/WebApps for areas such as general ledger, asset accounting, and others.
- Implemented backend logic and OData services for a new S/4 HANA system
- Analyzed the current state of SAP GUI transactions and derived suitable standard and custom developments
- Designed technical concepts and implemented custom UI5 apps in the Fiori Launchpad
- Automated OPA tests, extended and adapted standard Fiori apps
- Documented and created developer manuals in the wiki
- Conducted code reviews, approved and delivered software units via GitLab and SAP transports
Discover over 15,000 top freelancers
Statistics of experts using Weka
Aggregated from the professional profiles of matched freelancers.
Experience
22 years
Position duration
1.5 years
Positions per freelancer
22
Top business areas
Information Technology, Product Development, Research and Development
Top industries
Information Technology, Automotive, Banking and Finance
Bachelor's degree or higher
80%
Master's degree or higher
60%
Doctorate
20%
Certifications per freelancer
0
Most common languages
German, English, Spanish
Speak two or more languages
100%
Based on our profile pool as of 29 Oct 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology in Germany are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows the share of experts charging within that range.
Average rates of experts in Germany using Weka
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 29 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
Weka experts industry focus
See which industries our matched freelancers work in most often — every figure is calculated live from the freelancers on FRATCH.
- Information Technology (83%)
- Automotive (67%)
- Banking and Finance (67%)
- Healthcare (67%)
- Education (50%)
- Energy (50%)
- Insurance (50%)
- Manufacturing (50%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What Weka is
Weka is a well-known machine learning workbench for data mining, prediction, and analysis. It helps specialists load data, prepare features, train models, and compare results without building every step from scratch. Many teams use it for fast experimentation and for clear, repeatable analytic workflows.
Common use cases
- Classification for business or research datasets
- Clustering and exploratory data analysis
- Feature selection and data preprocessing
- Model comparison and validation
- Teaching, prototyping, and proofs of concept
Ecosystem and skills
Strong Weka professionals know the Explorer interface, the Experimenter for fair comparisons, and the KnowledgeFlow environment for visual pipelines. They also understand common data formats, filtering, evaluation methods, and how Weka fits beside Java-based data stacks. This matters when a project needs both speed and traceable results.
When companies bring in help
Teams often seek Weka expertise when internal staff need support with dataset cleanup, algorithm selection, or reproducible test runs. In Germany, this comes up in research groups, industrial analytics, and regulated environments where documentation matters. Freelancers are useful when a project needs focused delivery without a long hiring cycle.
What strong specialists deliver
A good Weka specialist does more than run a few models. They explain why a method fits the data, compare alternatives honestly, and leave behind workflows others can reuse. They also spot weak inputs, leakage risks, and evaluation mistakes before they become expensive.
Hiring for a Weka project
Look for clear communication, solid data handling, and practical experience with real datasets. Ask for examples of preprocessing, algorithm tuning, and validation work, especially if the project needs to run on site in Germany or collaborate smoothly with remote teams. The best experts make results understandable, not just accurate.
Frequently asked questions
Curious about Weka? Here are the answers that come up again and again.
Weka is used for data mining, machine learning, and practical model testing. Teams use it to clean data, compare algorithms, run classification or clustering tasks, and document results in a way that is easy to review.
Weka is often chosen for quick experimentation and a guided workflow, while Python stacks offer more flexibility for custom production systems. If a project needs transparent testing, classic algorithms, or a strong visual workbench, Weka can be a very good fit.
A strong Weka specialist usually understands data preprocessing, evaluation methods, and basic machine learning concepts such as overfitting and feature selection. Useful adjacent skills include Java, CSV and ARFF data handling, and the ability to explain results clearly to non-specialists.
A small proof of concept may only need someone who knows the interface and common filters. Larger or more sensitive projects need a specialist who can design sound experiments, avoid leakage, and choose metrics that match the real goal.
Weka works well with remote collaboration because datasets, workflows, and result files can be reviewed without being in the same room. On-site support can still help when the data is sensitive, the environment is hard to access, or business stakeholders want hands-on workshops.
Ask which parts of Weka they have used, how they handle missing values and feature selection, and how they validate models. Good answers mention the data, the evaluation plan, and the business goal, not just the algorithm name.
For most Weka work, the Explorer is used for interactive analysis, the Experimenter for comparing models, and KnowledgeFlow for building repeatable pipelines. A capable specialist knows when each one is the better tool for the job.
A strong Weka expert explains trade-offs, shows clean preprocessing steps, and can defend why a model was selected. They also produce outputs that others can reuse, which is important for teams that need more than a one-off result.
The average hourly rate of freelancers in Germany who have used Weka in their recent projects is 100 €, which corresponds to a daily rate of about 800 € based on an 8-hour working day.
Of the freelancers in Germany who have used Weka in their recent projects, 80% hold at least a Bachelor's degree, 60% hold at least a Master's degree, and 20% hold a doctorate.
On average, freelancers in Germany who have used Weka in their recent projects have 22 years of professional experience, with a single engagement typically lasting around 1.5 years.
The most common languages among freelancers in Germany who have used Weka in their recent projects are German (100%), English (100%), and Spanish (50%).
The most common industries among freelancers in Germany who have used Weka in their recent projects are Information Technology (83%), Automotive (67%), and Banking and Finance (67%).
The most common business areas among freelancers in Germany who have used Weka in their recent projects are Information Technology (100%), Product Development (83%), and Research and Development (67%).
Main locations of FRATCH Experts, who have recently used Weka
Our freelancers and interim experts are at home across the DACH region — available on-site in the major business hubs or fully remote. Choose a location to discover matched specialists, local market insights and up-to-date availability.
Berlin Hamburg Munich Cologne Frankfurt Stuttgart Dusseldorf Leipzig Dortmund Essen Bremen Dresden Hanover Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
