11.09.2026 aktualisiert

**** ******** ****
Premiumkunde
100 % verfügbar

Data Engineer

Leipzig, Deutschland
Deutschland
Master of Science
Leipzig, Deutschland
Deutschland
Master of Science

Profilanlagen

Johannes_Geisler_Data_Engineer_en.pdf
Johannes_Geisler_Data_Engineer.pdf

Skills

APIsApache AirflowAmazon Web ServicesBankingBash ShellBusiness IntelligenceGoogle BigQueryCloud ComputingComplianceDatenbankenBeratungContinuous IntegrationETLDatenqualitätDistributed ComputingDjangoE-CommerceSteuerungPythonPostgreSQLMachine LearningSAP HANAScalaSoftwareentwicklungSQLGoogle CloudFlaskSnowflakeApache SparkGitKanbanpandasData LakePySparkScikit-learnKubernetesDaskServerless ComputingDockerAmazon Redshift
Core Competencies:
  1. design and implementation of ETL and ELT processes using PySpark, pandas, dbt
  2. design and implementation of end-to-end machine learning systems in production environments
  3. implementation of test frameworks
  4. enablement of enhanced analytics
  5. collaboration across business and technical stakeholders
Software Engineering
  1. Languages: Python, Scala, Bash/Shell, SQL
  2. Libraries/Frameworks: pandas, scikit-learn, airflow, Flask
  3. distributed computing: Apache Spark & PySpark, Dask
  4. Cloud: AWS, GCP, Azure, Docker, Kubernetes, Serverless Architecture
  5. Databases: PostgreSQL, Snowflake, Redshift, Data Lakes, BigQuery, SAP Hana

Domain Expertise
  1. Business Intelligence
  2. Fraud Prevention & Fraud Detection
  3. Consulting
  4. Banking, E-Commerce, Tourism
  5. Compliance, Data Quality systems, Governance
  6. Git
  7. Docker
  8. SQL
  9. CI/CD
Communication & Collaboration
  1. agile collaboration with cross-funcional teams and stakeholders using frameworks like scrum or kanban
  2. ability to understand and explain complex IT topics in a way that non-technical people can understand
  3. active listening
  4. clear and structured documentation of code, processes, and decisions
  5. fluent in German and English

Erfahrung

Berufserfahrungmehr als 10 Jahre
Freelancer seit2022

Sprachen

DeutschMutterspracheEnglischverhandlungssicher

Projekthistorie

Senior Data Engineer - Integration of data pipelines for fraud prevention

Deutsche Bank

Banken und Finanzdienstleistungen

>10.000 Mitarbeiter

Model Development – Anti-Financial Crime (AFC)
  • Designed and implemented ETL pipelines and ML workflows to enhance transaction monitoring efficiency.
  • Contributed to the internal reimplementation of Actimize for parameter tuning using statistical methods and machine learning.
  • Automated ETL testing and optimized PySpark pipelines on a Hadoop cluster, reducing execution and model training times significantly.
  • Authored comprehensive pipeline documentation, ensured data quality, and performed detailed code and process reviews.

Senior Data Engineer - Integration of data pipelines

Deloitte

Internet und Informationstechnologie

  • development of data pipelines in pyspark
  • implementation of data transformations and data validations on ERP data
  • creation and optimization of airflow DAGs
  • working on CI/CD pipelines in jenkins and docker
  • python, pyspark, airflow, SQL, docker, AWS

Big Data Engineer - Integration of data pipelines

Positive Thinking Company

Internet und Informationstechnologie

250-500 Mitarbeiter

  • development of data pipelines in pyspark
  • creation of automated data validation and data transformation to ensure data quality
  • development of microservices and backend-tools using python and docker
  • working scrum framework
  • python, pyspark, docker, SAP

Data Scientist - AI implementation for fraud prevention

invia SSC germany GmbH

Sonstiges

250-500 Mitarbeiter

  1. development of machine learning application zu prevent fraud at flights
  2. implementation of a neural network using tensorflow
  3. creation of API services
  4. deployment of services using docker and k8s on AWS
  5. python, tensorflow, docker, django

Data Scientist - AI implementation for fraud prevention

sprd.net AG

Konsumgüter und Handel

  • working on POC for fraud prevention enhancement
  • development on machine learning workflow and data transformations
  • implementing several ML-algorithms to compare them for their usabilty at the company
  • scala, kafka, apache spark, zeppelin

BI working student - development of ETL and reports

sprd.net AG

Internet und Informationstechnologie

  • development of ETL processes
  • implementation of automated reports (PDF) and dashboards
  • further development of the DWH
  • pentaho, SQL, airflow

Zertifikate

Certified Associate Developer for Apache Spark

Databricks

2026

Professional Scrum Developer I

Scrum.org

2026

exali-logo

exali Berufshaftpflicht-Siegel

Das original exali Berufshaftpflicht-Siegel bestätigt dem Auftraggeber, dass die betreffende Person oder Firma eine aktuell gültige branchenspezifische Berufs- bzw. Betriebshaftpflichtversicherung abgeschlossen hat.

Versichert bis: 01.09.2028

Mehr erfahren

Kontaktanfrage

Einloggen & anfragen.

Das Kontaktformular ist nur für eingeloggte Nutzer verfügbar.

RegistrierenAnmelden