Jarkko Miettinen
Staff Engineer at Wolt
Helsinki, Finland
Summary
👤
Senior🎓
Top SchoolJarkko Miettinen is a Staff Engineer in Helsinki with 14 years of experience turning vague problems into precise, production-grade solutions across JVM systems, databases, and distributed services. He combines deep debugging and performance tuning skills with algorithmic and statistical thinking, having worked on in-house database engines and large-scale optimization methods. At Wolt and previously Swappie and RELEX, he’s focused on reliability and performance while mentoring teams and making major technical decisions. His background in bioinformatics and long history of responsibility for information security add a rigorous, interdisciplinary approach to system design and risk-aware engineering. Notably, he thrives on low-level JVM bug hunting and pragmatic trade-offs that squeeze measurable improvements out of complex stacks.
14 years of coding experience
15 years of employment as a software developer
MSc, Bioinformatics, Computer Science, MSc, Bioinformatics, Computer Science at Teknillinen korkeakoulu-Tekniska högskolan
Github Skills (93)
ruby10
concurrency10
jruby10
jvm10
java10
invokedynamic10
entitlements9
code-generator9
sdk9
api9
abac9
abstract-syntax-tree9
api-client9
parser9
code-generation9
Programming languages (7)
Github contributions (5)
jmiettinen/wikilinks
Mar 2015 - Feb 2020
Find shortest paths in Wikipedia
Contributions:5 PRs, 33 pushes, 3 branches in 4 years 11 months
pathsshortest-pathswikipedia
jmiettinen/timesheet-reader
May 2017 - Mar 2023
Contributions:6 pushes, 1 branch in 5 years 11 months
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