Heikki Vesalainen
Finland
Summary
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RockstarHeikki Vesalainen is a software engineer with 13 years of experience building mission-critical systems across industries from banking and healthcare to media and logistics. Comfortable in back-end engineering and tooling, he has contributed performance and robustness improvements to prominent Scala projects such as sbt, http4s, scala-dist and Slick, including practical fixes for terminal completions, indentation tooling, HTTP edge cases, and database deadlocks. Based in Finland, he combines deep Scala expertise with a pragmatic focus on reliability and maintainability, often addressing subtle bugs and edge cases that improve developer experience. Colleagues would describe him as a steady, detail-oriented problem solver who quietly strengthens complex systems rather than chasing the spotlight.
13 years of coding experience
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (22)
http10
databases10
sbt10
scala10
emacs10
sql10
performance-optimization10
build-tools10
database10
parsing9
parse9
error-handling9
regular-expression9
functional-programming9
documentation9
Programming languages (7)
Github contributions (5)
slick/slick
Dec 2016 - Apr 2019
Slick (Scala Language Integrated Connection Kit) is a modern database query and access library for Scala
Role in this project:
Back-end Developer
Back-end DeveloperContributions:6 releases, 5 reviews, 65 commits in 2 years 4 months
Contributions summary:Heikki primarily contributed to bug fixes and documentation updates within the Slick project, a Scala database query and access library. Their work included fixing issues related to column options, database backend functionalities, and the ManagedArrayBlockingQueue. They also addressed specific issues like deadlock scenarios and made enhancements to the documentation to improve clarity and usability. The user demonstrated experience with Scala and database-related programming.
queryintegratedscala-slicksqldatabase-query
sbt/sbt
Nov 2013 - Dec 2019
sbt, the interactive build tool
Role in this project:Back-end Developer
Back-end DeveloperContributions:11 commits, 9 PRs, 76 comments in 6 years 1 month
Contributions summary:Heikki contributed to the sbt build tool by implementing and enhancing the "completions" command, allowing for better tab completion functionality in various terminals, especially those that cannot use the default tab completion. They also added sbt-mode to Community-Plugins and updated the project's dependencies to newer versions of Jline, which improved the terminal's behavior and integration with Emacs. The commits include code modifications related to command parsing and terminal interaction.
zincsbt-pluginscalasbtbuild-tool
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