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.
15 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 (64)
jvm10
ruby10
invokedynamic10
jruby10
concurrency10
paths9
abstract-syntax-tree9
authorization9
emberjs9
parser8
rest-api8
code-generator8
zanzibar8
fine-grained-authorization8
abac8
Programming languages (8)
Github contributions (5)
jmiettinen/timesheet-reader
May 2017 - Mar 2023
Contributions:6 pushes, 1 branch in 5 years 11 months
jmiettinen/wikilinks
Mar 2015 - Feb 2026
Find shortest paths in Wikipedia
Contributions:6 PRs, 37 pushes, 3 branches in 11 years
pathsshortest-pathswikipedia
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