Hannes Ljungberg
Developer at Django Software Foundation
Stockholm, Stockholm County, Sweden
Summary
🤩
Rockstar🎓
Top SchoolHannes Ljungberg is a seasoned Python developer with 14 years of experience, based in Stockholm, who combines backend and DevOps expertise to ship reliable systems. He contributes to high-profile open source projects such as Django, docker-py and Ansible, focusing on database internals, service management, and automation modules that improve robustness across PostgreSQL, MySQL, SQLite and Docker Swarm. Currently building software at teenage engineering and an individual member of the Django Software Foundation, he has a track record of fixing subtle database bugs, adding protocol support (e.g., SCTP), and strengthening test coverage and documentation. Comfortable moving between application code, infrastructure automation, and ORM internals, he brings pragmatic engineering and a longtime commitment to open source.
13 years of coding experience
13 years of employment as a software developer
Programmering med Ruby, Programmering med Ruby at Gotland UniversitySoftware Engineering, Software Engineering at C3L
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (40)
application-framework10
unit-testing10
docker-swarm-mode10
docker10
postgresql10
pytest10
python10
django10
testing10
mypy10
service-management10
app-framework10
dockers10
docker-engine10
docker-api10
Programming languages (15)
Github contributions (5)
ansible/ansible
Jan 2019 - Jan 2020
Ansible is a radically simple IT automation platform that makes your applications and systems easier to deploy and maintain. Automate everything from code deployment to network configuration to cloud management, in a language that approaches plain English, using SSH, with no agents to install on remote systems. https://docs.ansible.com.
Role in this project:
Back-end & DevOps Engineer
Back-end & DevOps EngineerContributions:57 commits, 139 PRs, 264 comments in 11 months
Contributions summary:Hannes primarily contributed to the `ansible/ansible` repository by enhancing the `docker_swarm_service` module. Their work involved implementing new options such as `stop_signal`, `placement_preferences`, `working_dir`, and `read_only`, while also improving existing functionality and fixing bugs. This included improvements to network configurations, health checks, and resource management. They also refactored code to improve efficiency and readability, while adding network integration and unit tests.
everythingpythonit-automationdevopsdeployment
django/django
Oct 2021 - Apr 2022
The Web framework for perfectionists with deadlines.
Role in this project:Back-end Developer
Back-end DeveloperContributions:123 reviews, 14 commits, 43 PRs in 6 months
Contributions summary:Hannes primarily contributed to fixing bugs and implementing improvements related to database interactions and the Django framework's internals. Their work involved addressing issues in index generation, covering index support for PostgreSQL, and fixing database-related errors. The user demonstrated skills in modifying database schema, working with Django's ORM, and improving the framework's functionality for various database backends, including MySQL, PostgreSQL, and SQLite.
pythondjango-frameworkappsdjangoframework
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