Ulf Karlsson
Member Of Technical Staff at Stealth Startup
Greater Stockholm Metropolitan Area Sweden
Summary
👤
Senior🎓
Top SchoolUlf Karlsson is a Member of Technical Staff with 11 years of experience designing reliable, large-scale infrastructure for companies from Spotify to AI startups in the Greater Stockholm area. He has a strong track record building platforms from 0→1—everything from databases, storage and PG queries to API types, authentication, security and compliance. At Spotify he scaled video delivery and event pipelines for 100M+ users, combining backend Java services, Cassandra storage models and data engineering with Google Dataflow. Comfortable across languages and layers, his early work spans real-time Linux frameworks, C/C++ controllers and Python-based tooling, reflecting deep systems-level expertise. Colleagues describe him as pragmatic and detail-oriented, able to translate complex operational constraints into resilient, production-ready architectures.
11 years of coding experience
17 years of employment as a software developer
Master of Science (M.Sc.), Mathematics and Computer Science, Master of Science (M.Sc.), Mathematics and Computer Science at University of Gothenburg
Swedish, English, Spanish
Github Skills (116)
python10
peer-to-peer10
jooq10
collaborative-editing10
code-generation10
dependency-resolution10
code-generator10
yjs10
java10
python-modules10
visualization10
datatypes10
sql-formatter10
orchestration-framework10
sql-query9
Programming languages (9)
Github contributions (5)
ukarlsson/eos-clion-example
Mar 2018 - Apr 2018
Contributions:16 commits, 11 pushes, 1 branch in 1 month
ukarlsson/ktfmt-cli
Jul 2025 - Sep 2025
Contributions:1 release, 10 pushes, 1 branch in 2 months
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