EPISODE · Mar 19, 2026 · 17 MIN
Open Source Airflow Contributions and Performance Improvements at G-Research with Christos Bisias
from The Data Flowcast: Mastering Apache Airflow ® for Data Engineering and AI · host Astronomer
Modern Airflow isn’t just orchestration. It's a contribution.In this episode, we explore how open source investment drives real performance gains and deeper observability.We’re joined by Christos Bisias, Open Source Software Engineer, Apache Airflow at G-Research, to discuss how his team uses Airflow for large-scale data transformations, contributes upstream and improves scheduler throughput and OpenTelemetry support. From trace-level observability to CI-enforced metrics governance and a major scheduler optimization, this conversation spans strategy, engineering and community impact.Key Takeaways:00:00 Introduction.01:20 How G-Research applies machine learning and big data to predict financial market movements.02:15 Contributing to open source is a business decision.03:10 Maintaining a fork is costly.04:30 OpenTelemetry collects metrics, logs and traces to provide deep system visibility. 06:10 Custom spans help identify bottlenecks inside tasks and enable performance optimization. 08:05 OpenTelemetry integration works properly in Airflow 3.0 and above.10:00 A YAML-based metrics registry with CI enforcement ensures consistency between docs and exported metrics.12:10 Scheduler throughput improved significantly by applying concurrency limits earlier in the database query. 15:20 Future Task SDK changes may enable language-agnostic DAG authoring beyond Python.Resources Mentioned:Christos Bisiashttps://www.linkedin.com/in/xbis/G-Research https://www.linkedin.com/company/g-research/Apache Airflowhttps://airflow.apache.org/OpenTelemetryhttps://opentelemetry.io/Prometheushttps://prometheus.io/Grafanahttps://grafana.com/Jaegerhttps://www.jaegertracing.io/Thanks for listening to “The Data Flowcast: Mastering Apache Airflow® for Data Engineering and AI.” If you enjoyed this episode, please leave a 5-star review to help get the word out about the show. And be sure to subscribe so you never miss any of the insightful conversations.#AI #Automation #Airflow
What this episode covers
Modern Airflow isn’t just orchestration. It's a contribution.In this episode, we explore how open source investment drives real performance gains and deeper observability.We’re joined by Christos Bisias, Open Source Software Engineer, Apache Airflow at G-Research, to discuss how his team uses Airflow for large-scale data transformations, contributes upstream and improves scheduler throughput and OpenTelemetry support. From trace-level observability to CI-enforced metrics governance and a major scheduler optimization, this conversation spans strategy, engineering and community impact.Key Takeaways:00:00 Introduction.01:20 How G-Research applies machine learning and big data to predict financial market movements.02:15 Contributing to open source is a business decision.03:10 Maintaining a fork is costly.04:30 OpenTelemetry collects metrics, logs and traces to provide deep system visibility. 06:10 Custom spans help identify bottlenecks inside tasks and enable performance optimization. 08:05 OpenTelemetry integration works properly in Airflow 3.0 and above.10:00 A YAML-based metrics registry with CI enforcement ensures consistency between docs and exported metrics.12:10 Scheduler throughput improved significantly by applying concurrency limits earlier in the database query. 15:20 Future Task SDK changes may enable language-agnostic DAG authoring beyond Python.Resources Mentioned:Christos Bisiashttps://www.linkedin.com/in/xbis/G-Research https://www.linkedin.com/company/g-research/Apache Airflowhttps://airflow.apache.org/OpenTelemetryhttps://opentelemetry.io/Prometheushttps://prometheus.io/Grafanahttps://grafana.com/Jaegerhttps://www.jaegertracing.io/Thanks for listening to “The Data Flowcast: Mastering Apache Airflow® for Data Engineering and AI.” If you enjoyed this episode, please leave a 5-star review to help get the word out about the show. And be sure to subscribe so you never miss any of the insightful conversations.#AI #Automation #Airflow
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Open Source Airflow Contributions and Performance Improvements at G-Research with Christos Bisias
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