Stefan Linner
Dashboard for interactive data analysis
Experience
Dashboard for interactive data analysis
LennardtundBirner GmbH
Developed & deployed an interactive dashboard that lets users select datasets for visual analysis.
The application supports filters, AI-based interpretations, and a chatbot for user interactions.
shiny, openai, mirai, plotly, mapgl, duckdb, AWS, ShinyProxy, Docker Swarm
Automated reporting system
IQTIG
Revised R scripts to generate about 1,500 formatted Word tables for annual reports.
Led an analysis project to integrate and validate data from various sources.
Developed web applications and took responsibility for deployment.
shiny, SQL, rmarkdown, targets, ShinyProxy, Docker Swarm
Shiny apps for data processing
Roche Diagnostics GmbH
Developed & maintained multiple Shiny apps and APIs to integrate measurement data into a database.
Produced graphical analyses and automated reporting.
shiny, SQL, rmarkdown, plotly, ggplot2, dplyr, httr
Machine learning web application
Internal project
Built a web application to democratize machine learning: from data preprocessing to API-based model delivery.
shiny, rmarkdown, data.table, mlr3, vetiver, ShinyProxy, AWS EC2, AWS SageMaker
Shiny app for automated reporting and deployment
LennardtundBirner GmbH
Maintained and enhanced a Shiny app that automates various data analysis processes.
Presented results in custom PowerPoint presentations.
Managed deployment and ensured a scalable, secure setup.
shiny, officer, ggplot2, ShinyProxy, Docker Swarm, AWS EC2, AWS Route53, AWS Cognito
Geodata Download Dashboard
LennardtundBirner GmbH
Creation & deployment of a dashboard that allows users to download geodata for German regions.
Interactive map visualization.
shiny, osmdata, osmextract, leaflet, sf, ShinyProxy, AWS, Docker Swarm
Automated API Data Integration
LennardtundBirner GmbH
Developed an R package to automate API data downloads and data processing.
Presented results in custom PowerPoint reports via a Shiny app.
devtools, shiny, httr, officer, rmarkdown, future, promises, dplyr, ggplot2
Industries Experience
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Experienced in Information Technology (4 years) and Healthcare (3 years).
Business Areas Experience
The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.
Experienced in Business Intelligence (4 years), Information Technology (4 years), Project Management (3 years), and Product Development (3 years).
Skills
R: Very Good Knowledge.
Interactive Web Applications: Shiny, Bslib, Golem, Rhino
Ai & Chatbots: Openai, Mirai
Package Development: Devtools, Usethis, Roxygen2
Machine Learning, Deep Learning: Mlr3, Tidymodels, Caret, Tensorflow, Vetiver
Data Preparation: Dplyr, Duckdb, Duckplyr, Data.table, Purrr, Dbplyr
Data Visualization: Ggplot2, Plotly, Ggiraph
Unit Tests, Assertions: Checkmate, Testthat, Shinytest2
Reporting: Quarto, Officer, Rmarkdown, Knitr
Geodata: Mapgl, Osmdata, Leaflet, Sf
Web Scraping: Rvest
Api Requests: Httr, Httr2
Parallel Computing: Future, Furrr, Promises
Api Development: Plumber
Data Processing/analysis Pipelines: Targets
Reproducibility: Renv, Box
Deployment: Shinyproxy, Docker, Ci/cd, Aws Ec2
Sql: Good Knowledge.
Subqueries, Joins, Groupings & Aggregation
Excel: Good Knowledge.
Formulas & Functions, Data Visualization, Pivot Tables, Power Query, Vba
Other: Docker, Aws, Javascript, Html, Python, Latex, Git.
Languages
Education
TU Dortmund
Econometrics M.Sc. · Econometrics · Dortmund, Germany · 1,1
University of Passau
Business Administration & Economics B.Sc., focus on Accounting, Finance & Taxation · Business Administration & Economics · Passau, Germany · 1,1
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