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.
17 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.
bitcoin-walletbitcoinpythonelectrumlightning
zouppen/virtaboksi
Jul 2023 - Nov 2023
Contributions:120 pushes, 2 branches, 5 tags in 4 months
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