About the Role
Celonis is the trusted platform to industrialize Enterprise AI. At its core is the Celonis Context Model — which combines process data, business knowledge, and intelligence into a living digital twin of the enterprise that AI can actually understand, turning AI's operational blind spots into operational clarity. World's leading companies trust Celonis and its global ecosystem of partners to make their AI agents, people, systems, and processes work together, achieving transformational outcomes.
Data Core is the storage abstraction layer behind Celonis' data pipelines. It sits between ETL workloads and the backends that run them, such as Databricks, Snowflake, StarRocks, Spark, and PostgreSQL. You will work mainly on three codebases:
•Data Core, a Java / Spring Boot service with gRPC and message-queue APIs.
•sqlglot, where we translate and optimize SQL across dialects.
•StarRocks, the OLAP engine we use as a backend.
Responsibilities
•Implement features and fix bugs in Data Core backend integrations.
•Add and fix sqlglot dialect support: parsing, SQL generation, and transpilation correctness.
•Investigate StarRocks behavior and compatibility issues, and contribute fixes or workarounds.
•Debug slow or incorrect queries by following them from SQL text to query plan to results.
•Write unit and integration tests, especially for SQL translation edge cases.
•Take part in design discussions, write short design docs for your own work, and give and receive code reviews.
•As a Senior: lead small to medium projects end to end and help onboard newer teammates.
Requirements
•Solid Java, or strong Python with the willingness to work in Java daily.
•Good SQL skills: joins, aggregations, window functions, and an understanding of how queries execute.
•Familiarity with at least one analytical or distributed data system (for example Spark, Snowflake, Databricks, Trino, ClickHouse, or StarRocks).
•Good testing and debugging habits.
•Clear written and spoken communication, and a habit of asking questions early.
Strong Plus
•Exposure to how SQL parsers, ASTs, or query planners work.
•Contributions to open source projects, especially sqlglot or StarRocks.
•Experience with gRPC, message queues, or Kubernetes.
•Some C++ experience.
•Interest in query optimization and database internals.
What Celonis Offers
•Work with the global leader in Process Mining and the Process Intelligence Graph to shape the future of AI-driven business operations.
•Every full-time "Celonaut" is an owner, receiving Restricted Stock Units (RSUs) and merit-based refresh grants.
•Inclusive parental leave policy: 24 weeks of fully paid leave for primary carers and 12 weeks for supporting carers, available from your first day of employment.
•Unlimited PTO (in applicable regions) and generous PTO globally, plus a flexible hybrid work model balancing remote focus with office collaboration.
•70-20-10 learning framework, mentorship programs, and access to a dedicated learning platform.
•Subsidized Wellhub memberships, mental health counseling, and dedicated "Wellness Weeks."
•Annual Impact Days with paid time off to volunteer for community and environmental causes.
•Inclusion Think Tank and annual Inclusion Days.
Company
Celonis is headquartered in Munich, Germany, and New York City, USA, with more than 20 offices worldwide.
