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September 7, 2026
Junior Data Engineer – kdb+ and Timeseries Databases
Junior • On-site
27,300 - 32,760 PLN/yr
Krakow, MA, Poland
Apply now
Unleash the Power of Real-Time Data — Drive Innovation in Financial Markets!
As a Junior Data Engineer, you will contribute to building high-performance, low-latency systems that enable institutional investors and market professionals to make smarter decisions with real-time analytics and insights.
Responsibilities
- Develop and optimize kdb+ processes and queries to ensure maximum speed and efficiency for market-facing applications.
- Build analytic and aggregation layers that support downstream systems, APIs, and AI/ML models.
- Expose kdb+ data and analytics via APIs to front-end applications, AI engines, and reporting tools.
- Collaborate with AI and data engineering teams to provide clean, structured datasets for model training and deployment.
- Implement monitoring, alerting, and capacity-management strategies to sustain high availability of critical services.
- Ensure resilience and disaster-recovery plans are in place for all market-critical solutions.
- Partner with traders, quants, sales, and product owners to translate business needs into robust technical solutions.
- Follow internal policies on operational risk, data governance, and auditability to maintain compliance and security.
Requirements
- Passion for solving complex data-engineering challenges and strong problem-solving skills.
- Fundamental knowledge of computer science or experience with functional programming languages such as Clojure, Haskell, or Scala, or vectorization in Python, R, Matlab/Octave, or Wolfram Mathematica.
- Interest in technology, automation, and optimizing large datasets.
- Basic understanding of Linux, client-server architecture, cloud infrastructure, and AI/ML concepts.
- Collaborative, proactive approach and ability to manage tasks from inception to release.
- Communicative English.
- Existing legal right to work in the European Union.
Preferred Qualifications
- Knowledge of time-series databases, especially kdb+ and the q language.
- Experience with financial or market-data systems.
- Certifications or experience with cloud platforms or automation tools.
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