Mats Julian Olsen
Magic Wood, Germany
Summary
🤩
RockstarMats Olsen is Co-founder and CTO of Dune, a crypto data platform, bringing 12 years of experience building data-heavy backend systems. He pairs an MSc in Applied Mathematics with prior senior data science work to design performant analytics pipelines and materialized SQL views for complex DeFi protocols. An active open-source contributor, his work includes refactoring the search-index library for better maintainability and shaping Dune’s spellbook SQL views, plus contributions to Python utilities like addict. Based in Zug, Switzerland, he combines product-scale engineering and hands-on hacking with a practical focus on maintainability — and, as his GitHub hints, he might climb when not debugging queries.
12 years of coding experience
Github Skills (26)
javascript10
postgresql10
python10
object-oriented-programming10
data-structure10
dictionary10
javascripts10
sql10
data-structures10
protocols10
testing9
node-js9
unittesting9
unit-testing9
searching9
Programming languages (18)
Github contributions (5)
mewwts/addict
Dec 2014 - Nov 2020
The Python Dict that's better than heroin.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:10 releases, 156 commits, 50 PRs in 6 years
Contributions summary:Mats primarily contributed to the development of the `addict` library, which provides a custom dictionary class with attribute-style access. They implemented the core logic for setting, getting, and deleting items using both attribute and item syntax. The user added functionality such as a deep copy mechanism, and the ability to prune empty or false-y values from the dictionary. The changes included updates to the `__init__` method, incorporating support for tuples, generators, and other data types.
pythonflaskpython-dictaddictpython3
duneanalytics/spellbook
Jan 2020 - Aug 2021
SQL views for Dune
Role in this project:Back-end Developer & Database Engineer
Back-end Developer & Database EngineerContributions:116 reviews, 103 commits, 315 PRs in 1 year 6 months
Contributions summary:Mats's contributions primarily involve creating and modifying SQL views for the Dune Analytics platform. Their work includes defining materialized views for various DeFi protocols, such as Gnosis Safe and Compound. The user also addressed issues like invalid byte array formats and added hardcoded where clauses to optimize query performance. They demonstrated an understanding of data modeling and database optimization techniques.
sqldatabasemysqldune
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.