ETL Experts in Essen
to connect data faster with vetted and available freelancers matched by AIHire experts who design reliable extract, transform and load workflows, integrate ERP and CRM data, and prepare trusted datasets for analytics. FRATCH matches you quickly and precisely with vetted, available freelancers who fit your ETL project.
Meet FRATCH Experts in Essen, who have recently used ETL
Fadi S.
Last position:
Development of a production-ready Enterprise Document AI & Recommendation Platform at Freelancer
- Development of a production-ready Enterprise AI solution for the automated processing of invoices and business documents
- Integration of Azure AI Document Intelligence and LLM technologies into existing business processes
- Development of robust REST APIs for automated document processing and system integration
- Extraction, validation, and storage of structured invoice data in Azure SQL as a base for analytics and machine learning models
- Development of an AI-based recommendation engine with machine learning and deep learning to generate personalized product recommendations based on historical purchase data
- Implementation of logging, monitoring, error handling, and validation mechanisms for stable production use
- Collaboration with business teams to define business rules and integrate the solution into existing enterprise processes
Technologies: Python, Azure AI Document Intelligence, Azure OpenAI, Azure SQL Database, REST APIs, Machine Learning, Deep Learning, OCR, Pandas, JSON, Workflow Automation
Hervé T.
Last position:
Senior Data Engineer at Schweizerische Post AG
Tools: Fabric, AWS, dbt, Power BI, SQL, DWH, R, Python
- Supported customers in implementing an architecture design for extracting and preparing data
- Planned the design and implementation of the BI and DWH platform
- Ensured the scalability and performance of the data platform
Laurin H.
Last position:
Software Architect (Freelance) at Care4Sure
- Delivered MVP-focused full-stack architecture for a health-sector client: Vite/React frontend, backend services on Google Cloud Run, and Supabase for database plus IAM/authentication.
- Supported product requirements engineering and prioritized cost-aware workload placement, implementing browser-side/edge computation where feasible before moving logic to backend services.
Saruna M.
Last position:
Master's Thesis at Heinrich Heine Universität
- Title: Enhancing Syntactic Awareness in Transformer Language Models for Hindi Dependency Parsing
- Investigated syntactic knowledge captured by transformer language models (RoBERTa, XLM-RoBERTa) for Hindi dependency parsing, a morphologically rich and low-resource language.
- Developed structure-aware model variants (Struct_Roberta_hi, Struct_XLMR) by integrating a CNN-based parser network between transformer layers, inspired by the StructFormer architecture.
- Conducted extensive error analysis including label-wise, distance-based, direction-based, sentence length-based, and LVC/Non-LVC evaluations.
- Evaluated models on downstream NLP tasks (NER, POS tagging) using the IndicXTREME benchmark.
Henok A.
Last position:
Founder and Managing Director at Afworki GmbH IT-Consulting
The goal of Afworki GmbH IT-Consulting is to make small and medium-sized companies more competitive by overcoming challenges in digitalization, automation, and data management.
Tailored technology, strategy, and specialist consulting designed to meet the individual needs of each company.
Analyzing the company's current situation and developing the best possible solution together with the client.
Using both agile and classical IT project management methods to deliver projects on time and within budget.
Focusing on automating and orchestrating all data flows in a data warehouse to create a unified and standardized data foundation.
Considering the dependencies between IT and business to achieve sustainable positive effects.
Employing modern strategies and tools specifically tailored to the company's needs.
Supporting digitalization, the introduction of agile working methods, and the creation of up-to-date reports and analyses.
Objective: streamlining management and enabling well-founded, data-driven decision-making.
Asım Y.
Last position:
Freelance BI/DWH/ETL Specialist at Akbank
- Setting architectural standards for Informatica Power Center development teams
- Maintenance-performance-health for DWH (Exadata) environments
- Qlik Sense / BO reports architectural standards
- Implementing best practices in ETL tasks
- Documentation ETL standards on Confluence
- Dynamic Data Masking rules for GDPR/KVKK regulations by using Informatica DDM tool
- DWH Data model Power Designer
- Upgrade Qlik Sense versions
- Merge all Informatica server's repository databases on one Oracle DB
Ateet B.
Last position:
AI Engineer at MASX AI
Strategic transition into AI Engineering through intensive mentoring and project execution.
Developed MASX AI, an agentic AI platform integrating LangGraph, AutoGen, and RAG for geopolitical forecasting and real-time ETL.
Designed and delivered functional AI prototypes for prospective clients showcasing applied expertise in multi-agent systems, real-time data pipelines, and LLM integrations.
Alain Gérard E.
Last position:
Business Analysis / Requirements Engineering at 1&1
- Creating the functional specification for a dashboard solution for E2E management in the 5G deployment team in an Open RAN architecture
- Developing dashboards and reports with Power BI Desktop (data connection using Power Query, KPI calculations with DAX, publishing to Power BI Service)
- Developing solutions with Power Apps
- Integrating Power BI reports into Dynamics 365 Business Central
Rüdiger K.
Last position:
Data Analyst and Reporting Manager at Energieversroger
Implemented Power BI reporting for various departments at an energy provider. Agile project: responsible for organizing and coordinating with departments and IT, and regularly presented interim steps and results to project management.
Jochen R.
Last position:
Independent IT Consultant at Verti AG
- Project: Migration of large data sets
- Result: ETL route development with AWS Glue and Talend Open Studio
Discover over 15,000 top freelancers
Statistics of experts using ETL
Aggregated from the professional profiles of matched freelancers.
Experience
15 years (Germany: 17 years)
Position duration
1.9 years (Germany: 5.2 years)
Positions per freelancer
13 (Germany: 11)
Top business areas
Information Technology, Business Intelligence, Product Development
Top industries
Information Technology, Insurance, Automotive
Certification focus areas
Information Technology, Project Management, Business Intelligence
Bachelor's degree or higher
100% (Germany: 95%)
Master's degree or higher
78% (Germany: 67%)
Doctorate
11%
Certifications per freelancer
4 (Germany: 3)
Most common languages
German, English, French
Speak two or more languages
100% (Germany: 97%)
Based on our profile pool as of 19 Sep 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology in Essen are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows how many freelancers charge within that range.
Average rates of experts in Essen using ETL
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 19 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
ETL 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 (100%)
- Insurance (60%)
- Automotive (50%)
- Education (50%)
- Healthcare (50%)
- Manufacturing (50%)
- Energy (40%)
- Banking and Finance (40%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What ETL does
ETL means extract, transform and load. It moves data from operational sources into a structured destination such as a data warehouse, lake or reporting store. During the process, records are cleaned, mapped, validated and enriched so teams can use consistent information for analysis and operations.
Typical workloads
- Consolidating ERP, CRM and finance data
- Building warehouse loads for business intelligence
- Migrating data between applications or storage systems
- Scheduling repeatable pipelines with checks and alerts
- Preparing historical data for reporting and machine learning
ETL is useful when source systems differ in format, quality or update frequency. It creates a controlled path from raw records to dependable business data.
Tools and ecosystem
ETL specialists may work with cloud warehouses, relational databases, APIs, files and event sources. Common tooling includes Informatica, Talend, Microsoft SQL Server Integration Services, Apache NiFi, Pentaho and cloud services from AWS, Google Cloud or Microsoft Azure. Some teams choose ELT, where transformation happens after loading in the target warehouse, and strong professionals can assess that trade-off.
When to hire expertise
- Data loads fail silently or produce conflicting reports
- A warehouse or lake needs a new source connection
- A migration requires mapping, reconciliation and rollback planning
- Pipelines need better monitoring, testing or documentation
Companies in Essen often bring in freelance ETL expertise when manufacturing, logistics, retail or service data must be joined across older and newer systems. A remote setup can work well when source owners and business stakeholders agree on access, handovers and review language.
Skills that matter
Strong professionals understand SQL, data modeling, source profiling and transformation logic. They also know how to handle incremental loads, slowly changing dimensions, duplicate records, failed runs and sensitive data. Experience with orchestration, version control, automated tests and observability helps turn a fragile script into a maintainable pipeline.
How quality is judged
A good ETL deliverable is accurate, repeatable and transparent. It includes clear mappings, documented assumptions, validation rules, lineage and useful operational alerts. Experienced specialists ask how data will be consumed, define reconciliation criteria with stakeholders and leave behind pipelines that another team can support.
Frequently asked questions
The facts hiring teams ask for most often when it comes to ETL.
ETL extracts records from sources such as ERP systems, CRM tools, databases and files, transforms them into a consistent structure, and loads them into a warehouse or other destination. Companies use it for reporting, analytics, migrations, consolidation and governed data delivery.
ETL transforms data before loading it into the target system, while ELT loads raw data first and uses the destination platform for transformation. ELT can suit scalable cloud warehouses, whereas ETL remains useful when strict preprocessing, limited target resources or controlled data handling are important.
A strong ETL professional usually combines SQL, data modeling, database administration and API or file integration skills. Knowledge of orchestration, cloud storage, warehouse design, testing, monitoring and data governance is also valuable.
The right level depends on source complexity, data quality, compliance needs and the cost of incorrect results. A small, well-documented load may need focused implementation skills, while a cross-system warehouse migration calls for someone who can design mappings, controls, recovery procedures and stakeholder reviews.
Yes. ETL work is often suitable for remote collaboration because pipeline design, testing and documentation can happen through secure environments and shared repositories. On-site sessions may still help when specialists must inspect legacy systems or coordinate closely with teams in Essen.
For an ETL engagement, define the permitted environments, credentials, data masking rules, retention requirements and approval path before work starts. Separate development and production access, log changes, and make ownership of source definitions and target data explicit.
A reliable ETL deliverable has documented mappings, validation checks, lineage, failure handling and reconciliation against its sources. Ask for a test approach, sample run evidence and an explanation of how incremental loads, duplicates and late-arriving records are handled.
Manufacturing, logistics, retail, finance and public services often need ETL expertise to combine operational data for planning and reporting. Local teams may connect plant systems, order data, inventory records, customer information and finance platforms while preserving clear data ownership.
The average hourly rate of freelancers in Essen, Germany who have used ETL in their recent projects is 87 €, which corresponds to a daily rate of about 694 € based on an 8-hour working day.
Of the freelancers in Essen, Germany who have used ETL in their recent projects, 100% hold at least a Bachelor's degree, 78% hold at least a Master's degree, and 11% hold a doctorate.
On average, freelancers in Essen, Germany who have used ETL in their recent projects have 15 years of professional experience, with a single engagement typically lasting around 1.9 years.
The most common languages among freelancers in Essen, Germany who have used ETL in their recent projects are German (100%), English (100%), and French (40%).
The most common industries among freelancers in Essen, Germany who have used ETL in their recent projects are Information Technology (100%), Insurance (60%), and Automotive (50%).
The most common business areas among freelancers in Essen, Germany who have used ETL in their recent projects are Information Technology (100%), Business Intelligence (90%), and Product Development (70%).
Main locations of FRATCH Experts, who have recently used ETL
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 
Dusseldorf 
Nuremberg Countries:
Request a free demo
Get in touch with the FRATCH team and we will get back to you within 4 hours.
Would you rather directly get in touch?
We always have the time for a call or email!
Philipp Thomaschewski
FRATCH CEO
