Niclas Mattsson
Senior Software Developer at Nimsys AB
Greater Stockholm Metropolitan Area Sweden
Summary
👤
Senior🎓
Top SchoolNiclas Mattsson is a Senior Software Developer based in the Greater Stockholm area with over 8 years of focused experience in Java EE and a much longer history in enterprise systems dating back to the late 1990s. He has built high-performance, layered solutions for banks, public agencies and large enterprises, currently delivering critical systems at Handelsbanken and contracting for finance through Nimsys. Comfortable across the full development lifecycle, he pairs deep backend expertise (C++, Java, COBOL background) with hands-on integration work for partner systems. Known for pragmatic architecture and performance tuning, he repeatedly turns complex, high-throughput requirements into reliable production services. His career blends long-term consulting roles with in-house senior development, giving him a practical sense for both code quality and operational constraints.
8 years of coding experience
15 years of employment as a software developer
C++, Java, Cobol, C++, Java, Cobol at University of Karlstad
English
Github Skills (200)
prediction-model10
energy10
power-systems10
datasets10
visual-studio10
nonlinear10
github-desktop10
editor10
integer10
science10
julia10
electron10
typescript10
vscode-extension10
vscode10
Programming languages (10)
Github contributions (5)
niclasmattsson/ClimateCalculator
Aug 2019 - Sep 2020
Contributions:39 commits, 5 pushes in 1 year
niclasmattsson/Supergrid
Jan 2019 - Mar 2021
Contributions:166 commits, 17 pushes, 2 branches in 2 years 2 months
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