Jammi Heinonen
Chief Technology Officer at Suomen Seniorihoiva
Raseborg, Finland
Summary
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SeniorJammi Heinonen is a pragmatic CTO and seasoned software architect with 18 years of experience building full‑stack web and backend systems across startups and enterprise projects. He blends hands‑on development (Ruby, NodeJS, Python, JS) with strategic systems architecture and sales/PM support, favoring simple, maintainable solutions that balance time, budget and technical excellence. As a founder and former CEO he has shipped product frameworks (RSence) and led demanding customer projects ranging from multiuser portals and game server backends to embedded device integrations. Comfortable translating between technical and non‑technical stakeholders, he brings multilingual communication skills in Finnish, Swedish and English. Now seeking lower‑stress roles that still offer challenging problems, he prefers to grow domain knowledge and deep technical understanding over chasing buzzwords.
18 years of coding experience
26 years of employment as a software developer
finnish, english, swedish
Stackoverflow
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Github Skills (180)
firmware10
docker-desktop10
esp3210
keyboard10
macos-sierra10
ria10
karabiner10
3d-printer10
octoprint10
printer10
3d-printing10
arduino10
sublime-text9
linux9
avr9
Programming languages (10)
Github contributions (5)
rsence/rsence
Jan 2008 - Sep 2015
Contributions:1755 commits, 1 PR, 6 pushes in 7 years 9 months
responsiveguiria
jammi/rsnc
Apr 2015 - Jul 2023
rsnc.js is a client-side single page framework for rapidly developing large and complex webapps with minimal effort.
Contributions:6 PRs, 27 pushes, 6 branches in 8 years 5 months
effortdevelopingclient-sidejavascriptframework
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