19.10.2026 aktualisiert
NK
100 % verfügbar
Data Engineer | Data Analyst | Machine Learning
Clausthal-zellerfeld, Deutschland
Weltweit
M.Sc. InformaticsÜber mich
Data engineer and analyst who enjoys making data useful. I build ETL pipelines, analyze trends and develop machine learning models in Python and SQL. Clients work with me for clean code, honest timelines and clear explanations without jargon.
Skills
Data Engineering & ETL Pipelines
Expertise in building ETL/ELT pipelines with bronze-silver-gold layering, using tools such as Snowflake, dbt, Airflow, PostgreSQL, MySQL, SQL Server, Oracle, MS Access and Neo4j for robust data architecture and processing.
Business Intelligence & Reporting
Proficiency in Power BI (DAX, Power Query), Tableau, Excel/VBA, SharePoint and SAP Analytics Cloud for creating dashboards, automated reporting and data visualisation, reducing manual workload significantly.
Machine Learning & Statistics
Solid knowledge of scikit-learn, TensorFlow, NGBoost, LSTM, ARIMA and Random Forest for probabilistic forecasting, time-series analysis, anomaly detection, A/B testing and exploratory data analysis (EDA).
Programming Languages
Command of Python, SQL, R, Java, C#, C, MATLAB and VBA for data processing, backend development and automation tasks.
Cloud & Enterprise Systems
Hands-on experience with Azure, AWS, SAP S/4HANA, BW/4HANA, OmniTracker and MS Exchange for enterprise-level data management and cloud-based solutions.
Database Engineering & SQL
Development and optimisation of SQL queries, creation of database views, query-based selection systems and database reports using MS Access, PostgreSQL and SQLAlchemy.
LLM & RAG Applications
Experience building retrieval-augmented generation prototypes using LangChain, FAISS, ChromaDB, HuggingFace and Ollama.
Development Tools & Version Control
Practical use of Git/GitHub, Jira, Confluence, Jupyter, Google Colab, n8n and LangChain for collaborative development, version control and project management.
REST API & Backend Development
Design and implementation of REST APIs and backend applications using Python with the Flask framework, including data access and integration workflows.
Expertise in building ETL/ELT pipelines with bronze-silver-gold layering, using tools such as Snowflake, dbt, Airflow, PostgreSQL, MySQL, SQL Server, Oracle, MS Access and Neo4j for robust data architecture and processing.
Business Intelligence & Reporting
Proficiency in Power BI (DAX, Power Query), Tableau, Excel/VBA, SharePoint and SAP Analytics Cloud for creating dashboards, automated reporting and data visualisation, reducing manual workload significantly.
Machine Learning & Statistics
Solid knowledge of scikit-learn, TensorFlow, NGBoost, LSTM, ARIMA and Random Forest for probabilistic forecasting, time-series analysis, anomaly detection, A/B testing and exploratory data analysis (EDA).
Programming Languages
Command of Python, SQL, R, Java, C#, C, MATLAB and VBA for data processing, backend development and automation tasks.
Cloud & Enterprise Systems
Hands-on experience with Azure, AWS, SAP S/4HANA, BW/4HANA, OmniTracker and MS Exchange for enterprise-level data management and cloud-based solutions.
Database Engineering & SQL
Development and optimisation of SQL queries, creation of database views, query-based selection systems and database reports using MS Access, PostgreSQL and SQLAlchemy.
LLM & RAG Applications
Experience building retrieval-augmented generation prototypes using LangChain, FAISS, ChromaDB, HuggingFace and Ollama.
Development Tools & Version Control
Practical use of Git/GitHub, Jira, Confluence, Jupyter, Google Colab, n8n and LangChain for collaborative development, version control and project management.
REST API & Backend Development
Design and implementation of REST APIs and backend applications using Python with the Flask framework, including data access and integration workflows.
Erfahrung
Berufserfahrung0 - 5 Jahre
Freelancer seit2026
Sprachen
DeutschgutEnglischverhandlungssicherHindiMuttersprache
Projekthistorie
Processed and analysed large 50Hertz datasets, built bronze-silver-gold layered data pipelines, performed EDA, developed linear and NGBoost models for probabilistic forecasting, detected anomalies, performed A/B testing, supported management reporting with Excel and Power BI, and worked with SAP Analytics Cloud.
Developed an MS Access database for the Bridge Modernisation Programme Northwest managing 1,500+ sub-structures, wrote and optimised SQL queries, built query-based selection systems and database reports, used SharePoint and Power BI for data visualisation, and authored user and administrator manuals.
Analysed large real-time TenneT imbalance datasets for commodity analytics and reporting, built Power BI dashboards, developed VBA programs reducing manual workload by 50%, authored user manuals, provided support for OmniTracker and managed SAP and MS Exchange tools for internal users.