Hannu Kärkkäinen
CTO And Co-founder at Agileday
Espoo, Finland
Summary
👤
Senior🎓
Top SchoolHannu Kärkkäinen is a seasoned CTO and co-founder based in Espoo with over a decade of hands-on experience architecting data-intensive, production-grade web solutions and leading small to mid-sized engineering teams. He blends strategic leadership—pre-sales, roadmapping and team building—with deep technical chops from frontend React work to microservices, DevOps and production infra deployments. His background spans consultancy and product roles where he consistently moved from prototype to maintenance-free systems, favoring lean validation and rapid iteration. Comfortable both coaching teams and writing the code, Hannu has a track record of turning complex, mission-critical requirements into pragmatic architectures and operational delivery. An observant generalist, he often bridges business and engineering by validating ideas through prototypes and continuous customer feedback.
11 years of coding experience
10 years of employment as a software developer
Vocational School Datanome, Vocational School Datanome at North Karelia Secondary School, Lieksa, FinlandBachelor's Degree Media Technology, Bachelor's Degree Media Technology at Häme University of Applied Sciences, HAMK
English, Finnish, Russian, Japanese, Swedish
Stackoverflow
9reputation
0reached
1answer
0questions
Github Skills (58)
react10
wpgraphql9
neo4j9
fractal9
graphql8
datepicker8
dates8
flame8
wordpress-plugin8
typescript8
wordpress8
react-component8
cypher8
popup7
javascript7
Programming languages (6)
Github contributions (5)
Hellenic/react-hexgrid
Mar 2016 - Sep 2022
Build interactive hexagon grids with React
Contributions:1 release, 99 commits, 14 PRs in 6 years 7 months
reactmaintainer-wantedhexagonal-grids
Hellenic/universal-marketcloud-storefront
May 2016 - Feb 2018
Contributions:71 commits, 1 PR, 34 pushes in 1 year 8 months
ecommerceboilerplatee-commerceecommerce-storefrontstorefront
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