Lairs Johnstone
Director Of Engineering, Card Product Management (CRT Spain) at Cross River
Barcelona, Catalonia, Spain
Summary
👤
Senior🎓
Top SchoolLairs Johnstone is a pragmatic engineering leader with 15+ years building and operating large-scale production backends and SRE tooling across Google/YouTube, fintech, and Bitcoin startups. Currently Director of Engineering for Card Product Management at Cross River in Barcelona, he excels at removing operational friction, improving observability and processes, and translating deep technical trade-offs for non-technical stakeholders. Over the past decade he’s focused on runtimes, distributed systems and reliability while also leading hiring, cost management, and cross-functional roadmaps. A self-described “engineer’s engineer,” he combines hands-on coding with strategic team building and has taught and spoken about Bitcoin and Lightning Network topics internationally. He’s mission-driven rather than prestige-seeking, often choosing roles where technical work directly increases users’ freedom and product resilience.
11 years of coding experience
14 years of employment as a software developer
MSc Computer Science, MSc Computer Science at Umeå UniversityHigh School Education Natural Sciences, High School Education Natural Sciences at Liljaskolan
Swedish, English
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (200)
programming-language10
abc10
bitcoin-core10
security10
cryptocurrency10
build-automation10
p2p10
wallet10
linux10
continuous-delivery10
golang10
ipados10
database10
staging10
lightning10
Programming languages (13)
Github contributions (5)
hkjn/scripts
Jan 2015 - Nov 2017
Contributions:84 pushes in 2 years 10 months
hkjn/lnhw
Jun 2018 - Jul 2018
Chainlab 2018 hackathon project for a LN hardware wallet.
Contributions:38 commits, 29 PRs, 45 pushes in 8 days
hardware-walletethereumblockchainhackathon-2018wallet
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