Janne Kulmala
Software Engineer at Furuno Finland Oy
Helsinki, Finland
Summary
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SeniorJanne Kulmala is a seasoned software engineer based in Helsinki with over 8 years of professional experience building and maintaining server-side systems across UNIX and Windows environments. He brings deep C/C++ expertise alongside scripting proficiency in Perl, shell, and Python, and strong practical knowledge of Linux, CI, web servers (Apache/nginx), SSL, PHP and SQL. Janne has hands-on experience in systems administration and network security, and a sustained interest in open source — exemplified by contributions to Vitess where he improved vtclient resilience, health checks, messaging metrics, and testing documentation for a widely used MySQL sharding project. At Furuno Finland he continues to apply this blend of low-level programming and ops skills to robust, production systems. Known for pragmatic problem solving, he quietly balances legacy code familiarity (including past Java work) with curiosity about modern tooling and Android dabbling.
8 years of coding experience
9 years of employment as a software developer
Github Skills (7)
databases10
vitess10
go10
database-cluster10
mysql10
database10
testing8
Programming languages (1)
Github contributions (4)
vitessio/vitess
Aug 2017 - Nov 2017
Vitess is a database clustering system for horizontal scaling of MySQL.
Role in this project:
Back-end Developer & Database Engineer
Back-end Developer & Database EngineerContributions:10 commits, 6 PRs, 12 comments in 3 months
Contributions summary:Janne contributed to the `vtclient` tool by implementing features to allow repeated execution of queries, generate queries with random IDs, and prevent crashes when single queries fail. They also made changes to the health check system, addressing stream errors and ensuring proper notification handling. Furthermore, the user modified the messaging system, exporting message queue delay metrics, and improved documentation related to fake connections for testing.
mysqltidbhorizontal-scalingsqlvitess
janneku/vitess
Aug 2017 - Jan 2018
Contributions:24 pushes, 5 branches in 5 months
mysqlhorizontal-scalingsqlvitessclustering
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