Pekka Keränen
Entrepreneur And Freelance Developer at Geosaaga Oy
Joensuu, North Karelia, Finland
Summary
👤
Senior🎓
Top SchoolPekka Keränen is an experienced full‑stack developer and entrepreneur with eight years of professional experience building mobile and web applications, and a longer history in meteorological systems and Linux administration. As founder of Geosaaga Oy he has shipped consumer apps like Taivaanvahti and Sääikkuna and served major clients such as the Finnish Meteorological Institute, where he led development of the popular FMI Weather app and aviation/space weather systems. He is frontend‑oriented, skilled in JavaScript/TypeScript, React, React Native, Vue and Swift/SwiftUI, with backend experience in Node.js and PHP. Pekka combines product-focused UI craftsmanship with a systems background—his academic work on meteorological production monitoring earned top marks—making him comfortable across user experiences, production servers and scientific domains.
9 years of coding experience
2 years of employment as a software developer
Master of science, Information technology, Master of science, Information technology at Brno University of TechnologyMaster of science, Information technology, Master of science, Information technology at LUT University
Stackoverflow
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Github Skills (6)
weather10
react-native9
android9
mobile6
visualizer1
alerts1
Programming languages (2)
Github contributions (5)
fmidev/weather-app-assets
Feb 2025 - Jun 2026
Repository for Weather Application assets
Contributions:1 review, 2 PRs, 32 pushes in 1 year 4 months
smartmet-co/weather-app
Feb 2025 - Jun 2026
IDEAM's official weather application for mobile devices
Contributions:16 PRs, 33 pushes, 17 branches in 1 year 3 months
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