Sebastian Karlsson
Full Stack Engineer at Findex
Stockholm, Sweden
Summary
👤
Senior🎓
Top SchoolSebastian Karlsson is a versatile full stack engineer based in Stockholm with 12 years of hands-on experience across web and game development, comfortable from low-level C/C++ to Python, JavaScript and full-stack web frameworks. He has a track record building and optimizing production systems—ranging from bespoke CMS and game engines to performance-tuned mobile apps and measurement tooling for industrial use—often opting to dig into the underlying mechanics to improve efficiency. Currently at Findex after several years as an independent consultant, he blends practical client-facing delivery with deep technical curiosity and a preference for Linux (Arch) as his daily driver. Sebastian enjoys crafting beautiful UIs and elegant algorithms alike, and brings particular strength in system-level thinking, performance optimization, and creating custom tooling where off-the-shelf solutions fall short.
11 years of coding experience
6 years of employment as a software developer
Teknik, Programmering., Datorspel och programmering, Teknik, Programmering., Datorspel och programmering at Thoren Innovation School
Swedish, English
Github Skills (198)
photon10
tac10
jquery10
scripting10
wavefront10
codemod10
loader10
unix9
javascript9
linux-kernel9
linux9
opengl9
python-markdown9
lexer9
exe9
Programming languages (13)
Github contributions (5)
sebbekarlsson/tscc
Mar 2019 - May 2019
Contributions:64 commits, 2 pushes in 1 month
sebbekarlsson/hashmap
Jan 2021 - Sep 2022
Contributions:24 commits, 20 pushes, 1 branch in 1 year 7 months
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.