Joakim Koljonen
Database Developer
Malta
Summary
🤩
Rockstar🎓
Top SchoolJoakim Koljonen is a Database Developer with a decade of experience building and optimizing database solutions for the financial services sector, currently focusing on Postgres development at Trustly. He combines strong database design and T‑SQL skills with Python tooling and requirements analysis, honed since his early career at Multisoft Consulting. An alum of KTH Royal Institute of Technology, Joakim brings rigorous technical discipline to production systems and schema design. He is an active contributor to the popular open-source pgcli project, improving Postgres CLI autocompletion, query parsing, and alias/initialism completion—work that directly benefits developer productivity. Based in Malta, he favors pragmatic, maintainable enhancements that reduce operational friction in data-heavy environments. Colleagues rely on him for clean, reusable database features that bridge developer ergonomics and enterprise-grade reliability.
10 years of coding experience
3 years of employment as a software developer
KTH Royal Institute of Technology
English, Swedish, Finnish, German, Japanese
Github Skills (6)
autocomplete10
postgresql10
sql10
python10
database-design10
fuzzy-matching9
Programming languages (3)
Github contributions (5)
dbcli/pgcli
May 2016 - Aug 2017
Postgres CLI with autocompletion and syntax highlighting
Role in this project:
Back-end Developer & Database Engineer
Back-end Developer & Database EngineerContributions:123 commits, 49 PRs, 102 pushes in 1 year 3 months
Contributions summary:Joakim primarily contributed to the Postgres CLI's functionality by implementing and enhancing features related to autocompletion and query parsing. Their work involved modifying and improving the completion of column lists, function calls, and table/schema names. They also refactored code related to function handling within the FROM clause. The user further added features and fixed bugs related to supporting table alias and initialism completion.
clipostgresqlsyntax-highlightingpythonpostgres
koljonen/pgcli
May 2016 - Sep 2017
Contributions:376 pushes, 83 branches in 1 year 4 months
autocompletionpostgreshighlightingpostgresqlsyntax-highlighting
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