Fredrik Kjellberg
System Developer at Saab
Gothenburg, Sweden
Summary
👤
Senior🎓
Top SchoolFredrik Kjellberg is a systems-focused software developer with 13 years of practical experience and a strong academic background—currently completing a master's in Systems, Control and Mechatronics at Chalmers after a bachelor's in Computer Science. Based in Gothenburg, he combines hands-on backend work for resilient distributed systems (including contributions to the well-known Netflix/Hystrix project enhancing metrics publishing and fixing percentile/thread-pool calculations) with applied control and robotics interests from his studies. Employed at Saab since 2018, he brings industrial-grade engineering practices from prior roles at Ericsson and Volvo Cars, spanning test-equipment tooling, web-based databases, and verification. Fredrik’s profile reflects a rare blend of control theory intuition and production backend engineering, making him adept at building reliable systems where software meets physical hardware.
13 years of coding experience
1 year of employment as a software developer
Civilingenjör, Computer Science, Civilingenjör, Computer Science at Chalmers University of Technology
Swedish, English, French
Github Skills (10)
javas10
hystrix10
java10
metric10
performance-monitoring9
performance-measurement9
performance-monitor9
performance-analytics9
performance-analysis9
performance-tuning9
Programming languages (4)
Github contributions (5)
Netflix/Hystrix
Dec 2012 - Nov 2013
Hystrix is a latency and fault tolerance library designed to isolate points of access to remote systems, services and 3rd party libraries, stop cascading failure and enable resilience in complex distributed systems where failure is inevitable.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:8 commits in 11 months
Contributions summary:Fredrik primarily contributed to adding and integrating metrics publishing capabilities. This involved implementing modules to publish Hystrix metrics to various platforms, including Yammer Metrics and Coda Hale Metrics. They also fixed issues related to metric calculations, specifically addressing incorrect thread pool rate calculations and percentile values in the Servo publisher. Additionally, the user added the Apache 2.0 license header to multiple files.
isolatehystrixpartytolerancefault
fkjellberg/haproxy-2.1
Apr 2020 - Apr 2021
Contributions:59 pushes, 1 branch, 8 tags in 1 year
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