Willi Müller
Freelance Data Consultant
Müncheberg, Brandenburg, Germany
Summary
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Rockstar🎓
Top SchoolWilli Müller is a freelance data consultant and engineer with 11 years of experience helping companies build reliable, cost-efficient AI/ML-ready data platforms. He specializes in data modeling, ingestion and transformation pipelines (dbt, Airbyte, dlt), cloud warehouses (BigQuery, Snowflake, Exasol) and BI (Looker, Tableau), often migrating legacy setups to modern, maintainable stacks. Willi has repeatedly cut BigQuery costs by an order of magnitude, introduced dlt at multiple firms as a certified partner, and run self-hosted Airbyte in production to meet strict data-protection needs. He combines an M.Sc. in IT-Systems Engineering with hands-on implementation, stakeholder coaching, and onboarding of analysts into self-service analytics. Based in rural Brandenburg, he leverages remote-first workflows to deliver complex migrations and lasting data capabilities for product, finance, and analytics teams.
11 years of coding experience
7 years of employment as a software developer
Master of Science (M.Sc.) IT-Systems Engineering, Master of Science (M.Sc.) IT-Systems Engineering at Hasso Plattner InstituteComputer Science, Computer Science at Universidade Federal de Minas Gerais
English, Portuguese, German
Stackoverflow
651reputation
25kreached
3answers
8questions
Github Skills (143)
transliteration10
postgresql10
python10
operation10
airbyte10
data-warehouse10
databases10
data-ingestion10
etl10
data-loading10
duckdb10
data-pipeline10
lakes10
data-engineering10
dbt-packages10
Programming languages (9)
Github contributions (5)
DBDA15/data-cleansing
Apr 2015 - Dec 2016
Contributions:103 pushes, 7 branches, 1 comment in 1 year 7 months
willi-mueller/dlt-verified-sources
Jul 2023 - Jul 2024
Contribute to dlt verified sources 🔥
Contributions:2 PRs, 111 pushes, 51 branches in 1 year
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