Freelancer profile translated to English.

Description

I have been working with R for 8 years now. I started mainly with exploratory data analysis and supervised learning problems (mlr3, vetiver). During this time, I gained extensive experience with Tidyverse (dplyr, stringr, magrittr, purrr and also data.table), functional and object-oriented programming in R, visualization (ggplot2, plotly, leaflet), automated reporting (LaTeX, rmarkdown, knitr, officer), web scraping (rvest) and interactive web apps (shiny, bs4Dash).

I offer comprehensive services for the development of Shiny apps - from conception and actual programming to deployment and maintenance using ShinyProxy, Docker, CI/CD, and AWS.

Languages

German
Native or bilingual
English
Fluent
Spanish
Basic

Workplace preferences

Remote only

Primarily works remotely

LennardtundBirner
AI Dashboard
June 2024 - July 2025 (1 year and 1 month)
In this project, I am developing a dashboard that allows the user to select a dataset to be graphically analyzed. This dataset is then displayed in interactive maps and charts. Various filters and weights can be set to obtain the desired results. Furthermore, the created charts are interpreted directly in the application by an AI, and the user can interact with the AI via a chat function. I am also responsible for deployment with AWS, Docker & ShinyProxy.

Methods: Web Applications, AI, Data Visualization, Data Preparation, Reporting, Deployment

Tools & Libraries: shiny, openai, mirai, duckdb, duckplyr, plotly, mapgl, quarto, ShinyProxy, Docker Swarm, AWS
R Shiny ShinyProxy Docker Generative AI SQL
IQTIG
Word Automation & Dashboard Solutions
October 2023 - Today (2 years and 8 months)
In this project, I revised R scripts that automatically save evaluation results in the form of approximately 1,500 custom-formatted Word tables, ready for publication. Since these evaluation routines need to be performed annually, the scripts can be reused with minimal adjustments. I also manage an analysis project where data from various sources are merged, prepared, validated, and exported for further processing. For these evaluations, individual, smaller web applications are provided that accompany the analysis steps in an interactive dashboard, for the deployment of which I am also responsible.

Methods: Web Applications, Databases, Reporting, Data Preparation, Deployment

Tools & Libraries: Shiny, SQL, RMarkdown, dbplyr, targets, officer, ShinyProxy, Docker
R Shiny SQL Rmarkdown ShinyProxy Docker
ROCHE
Shiny Apps for Experiment Data
January 2023 - Today (3 years and 5 months)
Description:
In this project, I am responsible for designing, developing, and maintaining several applications, including R packages, Shiny apps, and APIs. Currently, I am responsible for maintaining and further developing two Shiny apps that write user-submitted measurement data to a database and evaluate it graphically. A report can be generated and downloaded.

Methods: Web Applications, Databases, Reporting, Data Visualization, Data Preparation, APIs

Tools & Libraries: Shiny, SQL, RMarkdown, plotly, ggplot2, dplyr, dbplyr, httr
R Shiny ggplot2 SQL Docker Rest-API