Johannes Smit
Data Engineer
United Kingdom
Summary
🤩
Rockstar🎓
Top SchoolJohannes Smit is a data engineer with nine years’ experience building scalable, cost-efficient data platforms and pipelines across retail, consulting, and startup environments in the UK. He has a track record of shrinking costs and improving performance at scale—most notably engineering a 90% onboarding cost reduction for a client with 10 billion events and debugging a client-specific pipeline slowdown that senior engineers had missed. Comfortable across the stack, he designs ELT/ETL systems, dashboards and secure infrastructure using tools such as Airflow, BigQuery, Snowflake, dbt and Terraform, and has introduced property-based testing and CI checks to raise data quality. He pairs strong technical problem-solving (query-plan analysis, streaming large JSONs) with product-minded delivery, having shipped client-facing dashboards and pipeline tooling that accelerate development. A mathematician by training, Johannes also brings an eye for operational risk and security, having redesigned secrets management and trained non-technical stakeholders to use analytical tools.
9 years of coding experience
4 years of employment as a software developer
Master of Mathematics, Mathematics, Master of Mathematics, Mathematics at University of Exeter
English, Spanish, Chinese, Afrikaans
Stackoverflow
121reputation
6kreached
4answers
7questions
Github Skills (138)
linux10
roc-lang10
gdscript10
pygobject10
science10
julia10
roc10
apt10
functional-programming10
game-engine9
nixos9
root-finding9
steam9
rust9
ternary9
Programming languages (22)
Github contributions (5)
Hasnep/setup-roc
Mar 2023 - Feb 2025
🏗️ A GitHub Action to install Roc
Contributions:56 PRs, 74 pushes, 44 branches in 1 year 11 months
rocroc-lang
Hasnep/ansible
Dec 2020 - Mar 2023
Contributions:44 pushes, 1 branch in 2 years 3 months
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