Johan Jern
Co-Founder & CTO at Realm Technologies
Helsinki, Finland
Summary
👤
Senior🎓
Top SchoolJohan Jern is a Helsinki-based Co-Founder and CTO with a decade of experience building backend systems, developer tooling, and AI-driven products. He co-founded Realm to apply agents to RFPs and sales deliverables after leading engineering efforts at fintech unicorn Pipe where he owned core systems like credit risk, data infrastructure, and APIs. Johan combines hands-on engineering—demonstrated by contributions to the Bazel Scala rules improving build/versioning and dependency checks—with product leadership in fast-moving startups. His background includes internships at Stripe and Palantir, consulting at BCG, and a CS MS from Aalto, reflecting both practical execution and strong academic foundations. Colleagues describe him as a builder who bridges complex infrastructure work with applied AI to reimagine workplace search.
10 years of coding experience
5 years of employment as a software developer
Master of Science - MS Computer Science, Master of Science - MS Computer Science at Aalto UniversityFinnish Matriculation Exam, Finnish Matriculation Exam at Mattlidens GymnasiumExchange studies, Exchange studies at National University of Singapore
Swedish, Finnish, English, French
Github Skills (7)
dependency-management10
bazel10
build-automation10
scala10
test-automation9
github-ci4
githubaction-workflow4
Programming languages (7)
Github contributions (5)
bazelbuild/rules_scala
Jun 2018 - Aug 2018
Scala rules for Bazel
Role in this project:
Back-end Developer & Build Engineer
Back-end Developer & Build EngineerContributions:12 commits, 15 PRs, 81 comments in 1 month
Contributions summary:Johan primarily focused on improving the build process and dependency management for the Scala rules within the Bazel build system. Their contributions included adding support for selecting Scala versions, integrating an unused dependency checker, and fixing build and test issues related to external dependencies like Scala XML, Scala Parser Combinators, and Scrooge. They also worked on updating test configurations and improving error messages within the testing framework.
bazelscalatestscalarulesbazel-rules
thesauri/korsord
Mar 2020 - Apr 2020
Solve crosswords collaboratively
Contributions:63 commits, 22 PRs, 32 pushes in 19 days
solvecrosswords
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