Junior Data Engineer

At Mindbox we connect top IT talents with technology projects for leading enterprises across Europe.  

You will join the AI Markets development team , responsible for providing reporting, analytics, and management information from multiple data sources to a diverse set of users, including senior management, quants, traders, and external clients .

A key component of this solution is kdb+ , one of the most advanced time-series databases where speed and performance at scale are critical . You will work with large datasets and real-time systems , focusing on data engineering, performance optimization, and API integration .

Sounds like your kind of challenge?  

What you get in return

Flexible cooperation model

Hybrid work setup – remote days available depending on the client’s arrangements - 2 days a week from the office in Kraków

Collaborative team culture – work alongside experienced professionals eager to share knowledge 

Continuous development – access to training platforms and growth opportunities 

Comprehensive benefits – including Interpolska Health Care, Multisport card, Warta Insurance, and more 

High quality equipment – laptop and essential software provided

Daily tasks

• Develop and optimize kdb+ queries and processes to meet low-latency, high-throughput performance requirements
• Build analytic and aggregation layers that feed APIs, downstream systems, and AI/ML workflows
• Expose kdb+ data to front-end applications, AI engines, and reporting systems via APIs
• Collaborate with AI/data engineering teams to deliver structured, high-quality datasets for models
• Implement monitoring and alerting solutions for kdb+ environments
• Support failover strategies and disaster recovery plans for critical services
• Partner with traders, quants, and business stakeholders to translate requirements into scalable solutions
• Adhere to internal policies around data governance, operational risk, and model risk complia

Requirements

A strong analytical mindset and a passion for solving complex data engineering challenges

Solid computer science fundamentals or experience with functional programming languages (Haskell, Clojure, Scala) OR vectorization skills in Python, R, Matlab, or Wolfram

Interest in large datasets, data modeling, and statistical concepts

Familiarity or willingness to learn Linux, Cloud infrastructure, and AI/ML integration

Ability to own tasks from requirements gathering to implementation and testing with cooperative engagement

Excellent problem-solving skills, proactive attitude, and strong communication skills

Nice to Have

Experience in financial services or trading environments

Knowledge of cloud platforms and distributed systems

Exposure to kdb+/q or interest in building expertise

Joining this project you’ll become part of Mindbox – a tech-driven company where consulting, engineering, and talent meet to build meaningful digital solutions. We’ll back you up every step of the way, accelerate your development, and ensure your skills make a difference.

Must have: Functional programming, Haskell, Clojure, Scala, Python, R, MATLAB, Data modeling, Linux, Cloud, AI, Requirements gathering, Testing

Nice to have: Communication skills, Cloud platform