Johann Kellerman
Product Line Manager, EMEA at Nokia
Gauteng, South Africa
Summary
🤩
Rockstar🎓
Top SchoolJohann Kellerman is a seasoned product line manager and networking specialist with 14 years of experience shaping IP routing and SDN solutions across the EMEA region at Nokia. With a strong engineering foundation in electrical, electronic and optical communications (B.Eng, B.Sc, D.Eng studies), he blends deep technical knowledge with regional product strategy and customer-facing consulting experience. His hands-on background includes infrastructure and operations roles in major South African telcos, giving him a pragmatic understanding of service provider networks from outside plant to core IP. An active contributor to open-source networking tooling, he has improved containerlab features around CLI, YAML autocompletion and SSH/template handling—demonstrating practical DevOps and back-end skills that complement his product management remit. Colleagues rely on him to translate complex protocol and SDN concepts into deployable product roadmaps and operator-ready solutions.
14 years of coding experience
6 years of employment as a software developer
University of Johannesburg B.Eng, Electrical & Electronic, B.Eng, Electrical & Electronic at Rand Afrikaans University
Github Skills (10)
container10
networking10
go9
docker8
rendering8
dockers8
render8
templating8
yaml7
cicd6
Programming languages (10)
Github contributions (5)
srl-labs/containerlab
Apr 2021 - Oct 2022
container-based networking labs
Role in this project:
Back-end & DevOps Engineer
Back-end & DevOps EngineerContributions:49 reviews, 81 commits, 24 PRs in 1 year 6 months
Contributions summary:Johann primarily focused on enhancing the `containerlab` project, a tool for creating container-based networking labs. Their contributions included implementing autocompletion for YAML files, improving command-line interface functionality, and addressing bugs. Moreover, the user made changes related to SSH configuration and the handling of template rendering, as well as making code improvements related to configuration management. They demonstrated expertise in project-specific configuration and interacting with networking environments.
containerlabsdncrpdceosdocker
kellerza/home-assistant
May 2016 - Apr 2022
:house_with_garden: Open-source home automation platform running on Python 3
Contributions:1 PR, 374 pushes, 314 branches in 6 years
raspberry-pipythonhousegardenmqtt
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