Data Engineer (m/f/d)

We are JOIN, Europe’s fastest-growing HR Tech company with over 30’000 clients in the DACH region and over 14’000 candidates applying through our software every day.

Our ambition is to change the way companies hire on a global scale. As a strong team with 60+ motivated colleagues, we are currently growing our team to become Europe’s most widely used talent attraction software.

We deeply believe that great companies are made by great people. That’s why we help thousands of companies attract, manage, and hire their next great talent in a smart way.


As a first team member solely dedicated to data engineering, you’ll play a pivotal role in establishing a scalable data infrastructure for data analysts & business developers.
Owning the complete data pipeline process, you’ll be

  • building and maintaining scalable pipelines, from data ingestion from various sources (Logs, APIs, Tools) to data modelling from unordered/denormalized sources
  • optimising performance of SQL based pipelines, models, applying e.g. indexing and partitioning techniques
  • implementing processes and systems to validate and monitor data quality, ensuring data integrity and consistency
  • writing unit/integration tests, contributing to engineering wiki, and documenting work
  • working closely with all business units and engineering teams to develop a strategy for long term analytical data architecture



  • 5+ years experience as Data Engineer or DBA
  • Proven track record in a fast growing startup (or comparable company setup)
  • A degree in computer science, engineering or related field
  • Python skills to accomplish complex data aggregation and transformation with multiple sources and data structures
  • Very good proficiency in SQL (complex, analytical queries, query performance tuning)
  • Demonstrated experience in building and maintaining a scalable analytical database, from architecture to pipelines
  • Experience working with data pipeline tools such as dbt, Airflow or AWS Glue
  • Knowledge in commonly used tools & software engineering best practices (GIT, Bash /Shell, …)

Nice to have:

  • Experience with GCP, BigQuery
  • Experience in dimensional modelling related to SaaS

Soft Skills:

Working in a fast-paced Start Up environment with flat hierarchies, you’ll need to

  • communicate well (ability to explain complex processes to a non-expert audience)
  • critically challenge data requests from other teams (Growth, BI, Product & Development
  • know how to work autonomously, long-sighted & diligent
  • be hands-on and pragmatic (Prioritize delivering value to the end-users in a lean way over tinkering with technology)
  • be flexible: Willing to work with existing setup (using our BigQuery, dbt setup and not shifting the stack immediately)
  • keep the business and customer value in mind
  • have a genuine interest to share your knowledge and elevate other team members to the next level


  • A varied role and the opportunity to grow together with JOIN
  • Inspiring, diverse, highly motivated and international working atmosphere
  • The unique opportunity to revolutionize the recruiting industry with a rapidly growing company
  • Design office in the famous Kulturbrauerei in Prenzlauer Berg
  • Latest hardware – choose Mac Book Pro or Lenovo Carbon X1