Santeri Hernejärvi
Senior Software Developer at Spotify
San Francisco, California, Sweden
Summary
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SeniorSanteri Hernejärvi is a senior software developer with 17 years of experience, currently building at Spotify from his base in San Francisco while originally hailing from Sweden. His long tenure spans hands-on roles from system administration and early startups to founding his own firm, incode, giving him a strong blend of product-first engineering and operational discipline. At Spotify he contributes to large-scale, user-facing systems where reliability and performance matter, drawing on deep experience in backend services and platform engineering. He has a track record of staying practical—shipping production code across multiple languages and stacks—and mentoring teams through real-world constraints. An understated detail: his career began in the late 1990s, so he brings institutional memory of web-era transitions and architecture evolution that few mid-career engineers possess. Santeri combines entrepreneurial grit with steady execution, making him effective at turning ambiguous problems into robust, maintainable systems.
17 years of coding experience
9 years of employment as a software developer
Github Skills (33)
bidirectional10
client-server10
endpoint10
sshd9
beast9
libev9
embeddable9
libuv9
libevent9
synchronous9
c-library9
emitter9
simple-framework8
proxy-protocol8
browser8
Programming languages (2)
Github contributions (5)
santeri/spotify-json
Nov 2017 - Nov 2024
Fast and nice to use C++ JSON library.
Contributions:4 pushes, 1 branch in 7 years 1 month
cppc-plus-plusheader-onlyjson-librarycpp17
santeri/pydiststore
Mar 2009 - Oct 2012
Contributions:34 commits in 3 years 7 months
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