Kalle Ahlström
Senior Software Architect at Nitor
Helsinki Metropolitan Area Finland
Summary
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Rockstar🎓
Top SchoolKalle Ahlström is a pragmatic Senior Software Architect based in the Helsinki area with four years of hands-on experience building cloud-native, reliable systems and scalable infrastructure. He combines software engineering, SRE and DevOps skills to design simple, maintainable solutions and is actively deepening expertise in IaC, AWS/GCP and Kubernetes. At Nitor he has progressed from SRE to senior architect roles, owning end-to-end designs and prioritizing long-term sustainability and developer happiness. Kalle contributes to notable open-source projects such as Apache Airflow—improving DockerOperator resource controls and fixing flaky logging behavior—highlighting a practical focus on observability and reliability. He also brings teaching experience and product work used by a large share of Finnish students, showing an ability to deliver impact across education and enterprise domains.
4 years of coding experience
3 years of employment as a software developer
Upper Secondary, Upper Secondary at Helsinki School of Natural SciencesBachelor's degree, Computer Science, Bachelor's degree, Computer Science at Aalto University
Github Skills (12)
apache-airflow10
docker10
workflow-engine10
orchestration10
python10
dockers10
pytest9
testing9
data-engineering9
cd8
cicd8
documentation7
Programming languages (15)
Github contributions (5)
apache/airflow
Sep 2023 - Aug 2024
Apache Airflow - A platform to programmatically author, schedule, and monitor workflows
Role in this project:
Backend Developer & DevOps Engineer
Backend Developer & DevOps EngineerContributions:11 reviews, 5 PRs, 25 comments in 11 months
Contributions summary:Kalle contributed to the DockerOperator by adding the `ulimits` parameter, enhancing the operator's capabilities in resource management within Docker containers. They addressed logging issues by implementing served log retrieval for non-running tasks and tasks up for retry. Further contributions involved fixing environment variable names in documentation and removing a flaky test related to served logs, improving the reliability of the codebase.
airflowapache-airflowapachepythonscheduler
kahlstrm/brc-rs
Apr 2024 - Nov 2025
1 Billion Row Challenge in Rust
Contributions:6 PRs, 56 pushes, 11 branches in 1 year 7 months
rust
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