Beschreibung

I have over a 5 years of experience in designing, developing, and maintaining data-driven and production-ready web applications in enterprise environment.

What I build (also review and refactor):

R/Shiny web applications with custom HTML, CSS/Sass, JavaScript, and SQL
R and Python ETL pipelines, analytical and modeling workflows
R packages and Python modules
CI/CD pipelines

How I enhance my work:

Use GitHub and Azure DevOps for version control and automation
Containerize development and deployment workflows using Docker
Collaborate in Agile Scrum teams (sprint planning, stand-ups, retrospectives)

Personal site and GitHub profile under active development and available soon.

Sprachen

Englisch
Muttersprachlich oder zweisprachig
Polnisch
Muttersprachlich oder zweisprachig
Spanisch
Grundkenntnisse

Arbeitsortpräferenzen

Vor Ort möglich

Barcelona (bis zu 50 km)

Freelance (Self employed)
R/Shiny and Python Developer
Februar 2026 - Heute (4 Monate)
Barcelona, Spanien
Designing and maintaining R/Shiny applications for data exploration and reporting.
Building ETL pipelines, analytical and modeling workflows in R and Python.
Implementing CI/CD pipelines and containerized deployments using Docker.
Reviewing and refactoring existing R/Shiny and Python codebases.
R Shiny Python ETL CI/CD
Kantar
Software Developer / Senior Data Scientist
April 2022 - Dezember 2024 (2 Jahre und 8 Monate)
Barcelona, Spain
Designing, developing and maintaining ETL and data modeling processes (Python / R) and analytical apps (Shiny).
Communicating and collaborating with project managers, business analysts and other dev teams.
General data science and analytics.
R Shiny Python ETL CI/CD
Kantar
Senior Data Scientist
Oktober 2019 - März 2022 (2 Jahre und 5 Monate)
Warsaw, Poland
R / Shiny and Python developing, data science and analytics.
Developing and maintaining ETL processes (R / Python) and analytical web apps (Shiny).
Creating and updating packages (R / Python).