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Offer summary
(Summary generated by AI based on the full job description)
The project focuses on ML solutions for payments and fraud prevention. Required stack: Python, SQL, BigQuery, GCP, Vertex AI. Responsibilities include end-to-end ML model delivery, problem discovery, feature engineering, training, validation, deployment, A/B testing and production monitoring, plus collaboration with product and engineering teams. Requires at least 6 years of experience, familiarity with advanced ML architectures (deep learning, graph-based, sequence models) and fluency in Polish and English. Rate 150–200 PLN/h B2B, 6-month project with possible extension, remote work with Kraków office option.
from: 18 September 2026
to: 18 October 2026
150 - 200 złnet (+ VAT)/ hr.B2B contract (full-time)
Offer parameters
level:senior • expert
working mode:remote
Gdańsk, Pomeranian
Gdańsk, Pomeranian
Requirements
Expected technologies
Python
SQL
Google Cloud Platform
BigQuery
Vertex AI
ML
A/B Testing
Our requirements
- Experience as a Data Scientist (6 years minimum)
- Strong skills in Python, SQL, BigQuery, GCP and Vertex AI
- Hands-on experience delivering ML models end-to-end
- Experience with feature engineering, model validation, A/B testing and production monitoring
- Experience with advanced ML architectures (such as deep learning, graph-based or sequence-based models)
- Experience working closely with Product teams
- Strong communication and collaboration skills
- Ability to explain ML concepts clearly to non-technical stakeholders
- Fluent in Polish and English
Optional
- Experience in Fintech, Payments or Fraud Prevention
- Experience working with bank account data
Your responsibilities
- Own the end-to-end delivery of ML models, from initial discovery to production
- Analyse data and perform feature engineering
- Build, validate and deploy ML models
- Run A/B tests and continuously monitor models in production
- Work on ML solutions for payments and fraud prevention
- Collaborate closely with Software Engineers, Product Managers and Designers
- Translate complex ML concepts into practical product solutions
- Help shape the technical direction and roadmap of ML solutions
- Research and apply the latest developments in ML and fraud prevention
- Write clean, high-quality, production-ready code
- Share knowledge and contribute to the technical development of the team
About the project
We’re looking for a Senior Data Scientist to join a project focused on using data and machine learning to build better payment solutions.
You’ll work with bank account data and build ML solutions that support payment success and prevention. You’ll own the full lifecycle of models - from problem discovery and feature engineering to prototyping, validation, production, A/B testing and monitoring.
This is how we organize our work
This is how we work
at the client's siteyou focus on a single project at a timeyou have influence on the technological solutions appliedyou have influence on the productyou focus on product development
This is how we work on a project
- code review
- Continuous Deployment
- Continuous Integration
- integration tests
- test automation
- unit tests
Recruitment process
- HR interview (online)
- Whiteboard discussion (machine learning + stats theory)
- Live coding (SQL + machine learning)
What we offer
- 150–200 PLN/h B2B
- 100% remote | Office (Kraków) available if preferred
- Full-time
- 6-month project with the possibility of extension
- International team and environment
Benefits
- sharing the costs of sports activities
- private medical care
- sharing the costs of foreign language classes
- sharing the costs of professional training & courses
- life insurance
- remote work opportunities
- flexible working time
- integration events
- no dress code
- coffee / tea
- drinks
- parking space for employees
Applandeo Sp. z o.o.
For over 12 years, Applandeo has been a trusted development partner for companies across the Europe and the USA, delivering MVPs, POCs, and full-scale, complex technological solutions, from lightweight prototypes and mobile apps, through web platforms, logistics, tracking and fintech systems, all the way to AI‑driven projects, integrations, and advanced cloud environments.
Senior Data Scientist (GCP, ML)
150–200 zł / hr. (B2B)
I apply to:
Applandeo Sp. z o.o.
Gdańsk, Pomeranian
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