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Senior Data Engineer
About On The Spot
About the team
Finonex is a company that develops innovative and advanced online financial trading platforms. We focus on creating accessible, secure, and user-friendly trading experiences powered by cutting-edge technology, supported by 24/7 service.
We’re united by a collaborative, Agile culture that values creative and productive teams, transparent communication, and shared success.
As a company that thrives on innovation and curiosity, we actively explore emerging technologies and industry trends — including AI and generative systems — through internal sessions, tech talks, and a culture of experimentation.
About the role
As we establish a brand-new Data Department, we are looking for highly skilled professionals who want to help build our data platform and shape the future of Finonex’s data strategy from the ground up.
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Responsibilities
- Design, implement, and maintain scalable data pipelines using Python and orchestration tools like Apache Airflow
- Take a leading role in evaluating and selecting foundational components of our data stack (e.g., Databricks vs. Snowflake)
- Architect and optimize data workflows across AWS and on-premise environments
- Work with modern file formats (Iceberg, Parquet, ORC) and understand their trade-offs for performance, cost, and scalability
- Collaborate with analysts, engineers, and stakeholders to provide accessible and reliable datasets
- Help assess and implement frameworks such as DBT for data transformation and modeling
- Develop best practices and internal standards for data engineering, monitoring, and testing
- Contribute to the long-term vision and roadmap of Finonex’s data infrastructure
Requirements
- 5+ years of hands-on experience as a Data Engineer or similar role
- Strong proficiency in Python for data processing and workflow automation
- Experience with Apache Airflow (managed or self-hosted)
- Solid understanding of data lake and table formats like Iceberg, Parquet, Delta Lake, and their use cases
- Familiarity with big data processing (e.g., Apache Spark) and query engines (e.g., Trino)
- Experience working in AWS environments, and comfort with hybrid cloud/on-premise infrastructure
- Proven ability to work independently, drive decisions, and evaluate technologies with minimal oversight
Nice to have
- Experience with DBT or other data modeling and transformation tools
- Prior involvement in building or migrating data platforms from scratch
- Exposure to Superset or other modern BI tools
- Knowledge of data governance, cataloging, or lineage tracking solutions
- Interest in shaping team culture, mentoring, and knowledge sharing
Benefits
- Work in a highly professional team. Informal and friendly atmosphere in the team.
- Paid vacation — 20 business days per year, 100% sick leave payment
- Equipment provision
- Partially compensated educational costs (for courses, certifications, professional events, etc.)
- Legal and Accounting support in Poland
- Ability to work from our comfortable downtown office in Warsaw
- 5 sick days per year
- Medical insurance (after the end of the probationary period)
- English and Polish classes 2 times a week (online)
- Bright and memorable corporate life: corporate parties, gifts to employees on significant dates
Join us
To be considered for this position, you must have Polish citizenship, a D-type work visa, or a residence permit. Thank you!
Contribute to our growth
Know someone perfect for this role? Let us know about them. We have a referral program to recognize your support.
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