Christer Johansson
System Specialist at TV4 Media
Greater Stockholm Metropolitan Area Sweden
Summary
👤
Senior🎓
Top SchoolChrister Johansson is a systems specialist with 12+ years designing and securing web and API backends, currently focused on application security, WAF, and secure AWS infrastructure at TV4 Media. He combines deep hands-on experience in Go, Elixir, Ruby on Rails, Java and JavaScript with strong expertise in CI/CD (Travis, GitHub Actions), Terraform, Solr/Elasticsearch and Linux-based operations. Christer routinely performs pentests, OWASP-driven assessments and DPIAs, advising teams on PCI and GDPR-compliant architectures while building automated scanning and deployment pipelines. His background includes academic research (PhD-level numerical modeling) which surfaces in a rigorous, analytical approach to systems design and numerical analysis. He maintains a public GitHub (github.com/chrjoh) for hobby projects used to learn new technologies, reflecting a continual learning mindset. Colleagues rely on him for pragmatic security guidance that bridges development, operations and compliance.
12 years of coding experience
Doctor of Philosophy (Ph.D.), Scientific Computing, Doctor of Philosophy (Ph.D.), Scientific Computing at Stockholms universitetKTH Royal Institute of Technology
English
Github Skills (35)
injection9
pentesting9
database8
python8
aws8
sql-injection8
sqlmap8
terraform7
req7
access-control-list6
sql6
sqlite6
ntlm6
aws-waf6
terraform-provider6
Programming languages (3)
Github contributions (5)
chrjoh/shell_code
May 2014 - May 2014
Contributions:31 commits in 21 days
chrjoh/limes
Sep 2018 - Nov 2021
Contributions:1 release, 11 commits, 11 pushes in 3 years 2 months
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