Joel Lehtonen
Board Member at Coinmotion
Espoo, Finland
Summary
👤
Senior🎓
Top SchoolJoel Lehtonen is a seasoned embedded and functional software engineer with 16 years of experience who now serves as a board member at Coinmotion while remaining an active technical contributor. He has led development of bitcoin hardware and ATM services—adding regulatory KYC features to EU-compliant ATM firmware—and contributed backend improvements to the widely used Electrum Bitcoin Wallet, including currency conversion and exchange-rate customization. Comfortable from low-level firmware to backend services, he has steered product teams and shipped secure, compliance-aware crypto products. Based in Espoo, Finland, Joel combines a Master's in Mathematical Information Technology with ham radio hobbyist discipline (callsign OH64K), reflecting a hands-on, systems-minded approach to engineering and communications.
16 years of coding experience
9 years of employment as a software developer
Master's degree, Mathematical Information Technology, Master's degree, Mathematical Information Technology at University of Jyväskylä
Stackoverflow
1,234reputation
248kreached
15answers
2questions
Github Skills (24)
ec10
python10
bitcoin-wallet10
bitcoin10
el10
bitcoins10
convert9
command-line-interface9
currency-exchange9
currency-converter9
convertion9
decimal8
decimal-numbers8
decimals8
lightning-network7
Programming languages (14)
Github contributions (5)
spesmilo/electrum
Dec 2022 - Dec 2022
Electrum Bitcoin Wallet
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 review, 8 commits, 2 PRs in 1 day
Contributions summary:Joel primarily contributed to the Electrum Bitcoin Wallet backend, focusing on command-line functionality and exchange rate integrations. They added a currency conversion command, improved error messages, and allowed for customization of exchange rate calculations. Their work also involved modifying existing commands and adjusting currency precision settings within the application.
pythonelectrumlightningwalletcryptocurrency
OH6AD/koolit
Apr 2016 - May 2019
Contributions:9 commits, 1 PR, 1899 pushes in 3 years 1 month
radioamateur-radiofinnishamateur
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