Senior Full Stack Data Engineer

Circonomit; Köln; Vor Ort; EUR 70.000 - 90.000; Vollzeit

Zusammenfassung

A progressive technology firm in Cologne, Germany, is looking for a Senior Data Engineer. You will collaborate closely with the CTO to architect and implement data solutions, focusing on building scalable and efficient data processing pipelines. Candidates should have over 5 years of experience in data products, proficiency in programming languages such as Python, and a strong understanding of database modeling. The role offers a competitive salary, equity package, and benefits like an Urban Sports Club membership.

Leistungen

Competitive salary

Equity package

Urban Sports Club membership

Opportunities for rapid learning and growth

Qualifikationen

• 5+ years experience in data engineering, especially with integrations-focused products.
• Proven experience in building production-grade data solutions.
• Fluent in English and German at C1 level or higher.

Aufgaben

• Architect complex data flow solutions for auditable computations.
• Design data layer merging metadata with semantic graphs.
• Implement scalable processing pipelines leveraging distributed systems.

Kenntnisse

Data architecture

Python programming

SQL and database modeling

ELT/ETL processes

Cloud infrastructure

Graph databases

Analytical skills

Proactive working style

Tools

Apache Spark

Apache Flink

PostgreSQL

Infrastructure-as-Code tools

Jobbeschreibung

At Circonomit, we follow the mission to build the strategic twin of organizations. By transforming operational data into clear impact models, we revolutionize how resources are managed. As a Senior Data Engineer, you will partner directly with our CTO to architect the semantic backbone of our platform, taking full ownership of the distributed pipelines and knowledge graph ontologies that bring our mission to life. Join our nerdy, fast-paced team to build the semantic structures that make our mission possible.

What you’ll build

• Architect complex data flow solutions, enabling transparent, versioned, and fully auditable computations
• Design the data layer by developing metadata and data lineage models fused by semantic graphs and numerical data
• Develop ontologies to translate abstract domain logic into clear, queryable graph models and vice versa
• Implement robust, scalable processing pipelines for time-, resource-, and cost-based data leveraging distributed systems (e.g., using dbt, dlt, etc.)
• Drive the integration of LLM-driven workflows to automate the transformation of unstructured data into structured knowledge
• Define standards for data integrity, quality, and versioning across various systems and platforms
• Bring extensive practical experience with ELT/ETL processes, data integration platforms, and related tools such as Apache Spark, Apache Flink, Python/Scala
• Drive technical decisions by staying ahead of industry trends in data engineering and language models
• Partner closely with our CTO and product team to identify the highest-ranking product opportunities for leveraging data in decision-making processes

• 5+ years of experience building production-grade integrations-heavy data products (e.g., Spark, Flink, Dask, or Ray), preferably in a startup or fast-paced environment
• GitHub or portfolio showcasing your data architecture capabilities, demonstrating work on end-to-end pipelines, semantic models, or complex dependency flows
• Proficiency in programming languages (e.g. Python) for production-grade data systems and expertise in SQL and database modeling (e.g. PostgreSQL)
• A proactive, analytical, and independent working style with a strong sense of ownership and a strong bias for action
• Hands-on experience with cloud infrastructure (AWS, Cloudflare, or similar) and Infrastructure-as-Code tools
• Familiarity with graph databases, ontologies, semantic modeling, and translating abstract domains into structured data models
• Experience with modern data warehousing and data lake concepts, and exposure to LLM-driven data workflows
• English and German proficiency at C1 level or higher
• Already living in or willing to relocate to Cologne, Germany

• You join as part of the core team to shape the technical foundation and story of our company
• We empower you with ownership and decision-making authority to build, test, and lead starting day one
• We ensure you have skin in the game by offering both a competitive salary and a significant equity package
• We fully cover your Urban Sports Club membership because we believe that high performance relies on active recovery
• You have the space to learn and progress quickly, encouraged by the contagious curiosity and ambition of our team

Can\'t wait to chat!

“Hustle the day, analyse at night, reinforce something outstanding” Period.

Erik & Dana