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Top Scala Data engineering repositories on GitHub

Pipelines, orchestrators, and ELT/ETL tooling. Filtered to projects whose primary language is Scala.

Ranked by stars across 15 Scala repositories tagged data-engineering. Refreshed daily.

  1. 1
    metarank/metarank★ 2,443 · ⑂ 108

    A low code Machine Learning personalized ranking service for articles, listings, search results, recommendations that boosts user engagement. A friendly Learn-to-Rank engine

    • ranking
    • scala
    • search
    • personalization
    • machine-learning
    • deep-learning
  2. 2
    feathr-ai/feathr★ 1,941 · ⑂ 247

    Feathr – A scalable, unified data and AI engineering platform for enterprise

    • feature-engineering
    • feature-store
    • artificial-intelligence
    • mlops
    • data-engineering
    • data-quality
  3. 3
    starlake-ai/starflow★ 212 · ⑂ 30

    Declarative text based tool for data analysts and engineers to extract, load, transform and orchestrate their data pipelines.

    • spark
    • bigquery
    • hdfs
    • redshift
    • snowflake
    • synapse
  4. 4
    swoop-inc/spark-alchemy★ 192 · ⑂ 34

    Collection of open-source Spark tools & frameworks that have made the data engineering and data science teams at Swoop highly productive

    • spark
    • data-science
    • scala
    • data-engineering
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  6. 5
    SETL-Framework/setl★ 186 · ⑂ 32

    A simple Spark-powered ETL framework that just works 🍺

    • spark
    • etl
    • framework
    • scala
    • setl
    • pipeline
  7. 6
    dimajix/flowman★ 98 · ⑂ 19

    Flowman is an ETL framework powered by Apache Spark. With its declarative approach, Flowman simplifies the development of complex data pipelines.

    • hadoop
    • spark
    • scala
    • etl
    • flowman
    • data-engineering
  8. 7
    galliaproject/gallia-core★ 89 · ⑂ 4

    A schema-aware Scala library for data transformation

    • scala
    • data-transformation
    • json
    • spark
    • etl
    • nesting
  9. 8
    StabRise/spark-pdf★ 82 · ⑂ 4

    PDF DataSource for Apache Spark, allow to read PDF files directly to the DataFrame and ocr it

    • ocr
    • ocr-recognition
    • pdf
    • pdf-document
    • pdf-document-processor
    • spark
  10. 9
    opensnowcat/opensnowcat-collector★ 77 · ⑂ 7

    OpenSnowcat Collector, an open source fork of Snowplow (Apache 2.0 License)

    • snowplow
    • analytics
    • event-pipeline
    • data-engineering
    • data-pipeline
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Find Scala engineers shipping Data engineering

The list above ranks the most-starred public Scala repositories tagged with the Data engineering topic, drawn from the public GitHub graph. Across 15 matching repositories, the contributors are a tight cluster of engineers with both Scala chops and real Data engineering experience.

That overlap is rare. Most Scala engineers haven’t shipped Data engineering, and most Data engineering maintainers don’t write Scala. The people on this list’s contributor graph are the ones who do both.

Refolk turns this list into a search. Ask for “Scala Data engineering maintainers hiring” or “Scala engineers shipping Data engineering in 2025” and Refolk returns a ranked shortlist with the commits, profiles, and projects behind each name.

How this list is built

Refolk searched GitHub for public Scala repositories tagged with the Data engineering topic, ranked them by stargazer count, and kept those with at least 25 stars. The list refreshes once a day.

Last refreshed: Fri, 18 Sep 2026 08:00:01 GMT

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How are these repositories ranked?

By stars, with forks and recent activity as tiebreakers, read from the public GitHub API. The methodology section above has the details.

How fresh is the data?

The ranking re-renders at least daily. Last refreshed: Fri, 18 Sep 2026 08:00:01 GMT.

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Yes. Stars rank the projects; I can rank the engineers - maintainers, top contributors, and the people they work with. You start with 500 free credits, no card required.

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