About Me
Hi, my name is Felix Uellendall. I am a young Data Engineer working in a data team for a digital agency in Berlin, Germany. I joined the Apache Software Foundation in September 2019. Since then I am also an Apache Airflow Committer.
Technical Skills
I am most skilled in:
Apache Airflow Python Unit Testing
I have experience in:
Agile Methodologies Amazon Redshift AWS Bash C# CI/CD CSS dbt Docker ETL/ELT
Git great_expectations HTML Java JavaScript MySQL PostgreSQL Python Pandas REST Software Design
Software Development System Testing
I am familiar with:
Apache Spark Databricks Express.js GCP Golang Julialang Kubernetes Microsoft Azure
Node.js Terraform Test Driven Development
Languages
German (Native speaker) and English (Upper-intermediate)
Projects
"Airflow is a platform to programmatically author, schedule and monitor workflows." - Apache Airflow
In search for a solution for the management of data pipelines I stumbled upon the Open-Source project Apache Airflow in January 2018. I really appreciate the simplicity of use, high coverage of use cases and the community behind it. That’s why I decided to give something back so I started contributing and am now a committer of this project.
"Auto-generated Diagrams from Airflow DAGs." - Felix Uellendall
A personal project to auto-generate diagrams based on Apache Airflow DAGs. Airflow DAGs specify workflows which consists of tasks which can depend on eachother. Based of these tasks and dependencies a Diagram will be generated. A Diagram visualises the provider (often cloud-based) used in the Airflow DAGs by simply displaying its logos.
"An Airflow plugin to visualise airflow-diagrams." - Felix Uellendall
A personal project to easily integrate airflow-diagrams to Apache Airflow. An Airflow Plugin can be easily added to a Apache Airflow installation and in this case visualises the output of airflow-diagrams.
"A database and api service for movies hosted on a dockerized raspberry pi." - Felix Uellendall
A personal project for user-friendly self hosting of an API Service on simple computer devices.
"An analytics stack on a raspberry pi deployed in kubernetes." - Felix Uellendall
A personal project for user-friendly self hosting of an analytics stack on simple computer devices.
Experience
"The World's Largest Open Source Foundation" - Apache Software Foundation
For Apache Airflow I am..
- writing project and code documentation
- writing unit tests in python
- adding new features like Airflow hooks and operators
- reporting bugs via Jira or GitHub Issues
- communicating with the community via email and slack
- writing Airflow Improvement Proposals in Confluence
- reviewing GitHub pull requests
- helping users to join the community
- testing and voting releases
"Germany's most impactful customer experience agency" - Digitas Pixelpark GmbH
- built a data management platform on AWS for our data analysts and scientists to access analytics data efficiently
- added CI/CD to our DMP (data management platform) via GitLab CI/CD which lints, tests, builds documentation and deploys our code to a development or production environment
- building (ETL/ELT) data pipelines with Apache Airflow
- connecting new data sources (mostly via REST APIs) to our data platform
- transforming data via SQL or Python Pandas to be analytics-ready
- designing workflows efficiently by making use of a lot of features of Apache Airflow
- monitoring of our data pipelines
"Our mission is to enable every SMB organization to achieve operational agility with visual scheduling." - NETRONIC Software GmbH
- built a .NET Windows Forms application in C#
- learned that code readibility is important through refactoring and mentorship
- learned the efficient usage of version control systems
- built a web application accessing Microsoft Azure Active Directoy via a REST API to manage users for one of our products
- built a hybrid mobile application to let our customers monitor their machines status easily
Education
OSZ IMT
https://www.oszimt.de/Shortened apprenticeship for software development
September 2016 - January 2018
Oberstufenzentrum Informations- und Medizintechnik
During my time of the apprentice I was working for Publicis Pixelpark GmbH. There I built..
- a REST API with the Spring Framework in Java
- a web application with Node.js, Express.js and Handlebars
- a command line application for our data team for automated transfer of social listening data
FH Aachen
https://www.fh-aachen.de/ICT with specifics in application development [Incomplete]
August 2013 - August 2016
Aachen University of Applied Sciences
I learned about..
- the basics of programming in C++
- several other programming languages like Assembly, Prolog and Matlab
- algorithms and data structures
- IT security and forensic
- databases and web technologies
- computer systems architectures, operating systems and distributed systems
Bk GuT
https://www.bkgut.de/IT assistant and advanced technical college entrance qualification
August 2010 - August 2013
Berufskolleg für Gestaltung und Technik
I learned about..
- the basics of programming in C# and Java
- web development with PHP and MySQL
A Little More About Me
I love creating things, solving puzzles, thinking about code and improving challenging problems. Open Source is what I like doing the most. I enjoy working in the community and sharing my knowledge with each other.
I also fell in love with the nature and the silence being out there. I like hiking, playing the piano and I am fascinated by the universe.