Johan Gustafsson
CTO, Co-founder at Terna Systems AB
Stockholm, Sweden
Summary
👤
Senior🎓
Top SchoolJohan Gustafsson is a CTO and serial founder based in Stockholm with 9 years of engineering and leadership experience spanning startups and industrial operations. He combines an M.Sc. in system controls and mechatronics with a background in economics and mechanical engineering, enabling a pragmatic, systems-level approach to product and platform design. As co-founder of Terna Systems and earlier ventures CLOO and Zyax, he moves fluidly between hands-on development, performance engineering, and strategic technology direction. His open-source work includes optimizing an Ethereum vanity address generator—improving Keccak performance, memory use and elliptic point math—illustrating deep low-level optimization skills not obvious from his executive title. Earlier roles in drilling engineering and distributed sensor filtering reflect a strong foundation in real-world, safety-critical systems and signal processing. He brings entrepreneurial grit, cross-disciplinary rigor, and a knack for squeezing high performance from constrained systems.
9 years of coding experience
3 years of employment as a software developer
Master of Science (M.Sc.) System controls and mechatronics, Master of Science (M.Sc.) System controls and mechatronics at Politecnico di MilanoMaster of Science (M.Sc.) System controls and mechatronics, Master of Science (M.Sc.) System controls and mechatronics at Chalmers University of TechnologyBachelor of Science (B.Sc.) Economics, Bachelor of Science (B.Sc.) Economics at University of Gothenburg
Swedish, English, Italian, Norwegian
Github Skills (9)
opencl10
elliptic-curve-cryptography10
parallel-computing10
performance-optimization10
cryptography10
cprogramming-language9
ethereum9
c-language9
cuda7
Programming languages (1)
Github contributions (5)
johguse/profanity
Jul 2018 - Sep 2022
Vanity address generator for Ethereum
Role in this project:
Back-end Developer & Performance Engineer
Back-end Developer & Performance EngineerContributions:11 releases, 27 commits, 8 PRs in 4 years 3 months
Contributions summary:Johan primarily focused on optimizing the performance of the Ethereum vanity address generator. They improved the Keccak implementation, resulting in a significant performance boost. The user also addressed initialization issues and bugs, further enhancing the stability and speed of the address generation process. They added memory optimizations, and refactored the code by implementing several code changes based on mathematical optimization for elliptic point addition.
ethereumvanity-addressaddressvanity
johguse/ERADICATE2
Nov 2019 - May 2020
Contributions:4 releases, 7 commits, 4 pushes in 6 months
vanity-addressaddressaddressescreate2vanity
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