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Senior ML Engineer/Data Scientist

FINARTIX Fintech Solutions S.A.

Athens, Attica, Greece Hybrid permanent

Posted: February 20, 2026

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Quick Summary

We are looking for a skilled ML Engineer/Data Scientist to join our team in Greece.

Job Description

We are currently looking for a passionate and motivated ML Engineers/Data Scientists to join our team of ΙΤ professionals on behalf of our clients in different industries within the Greek market. The candidate will play a key role in the development, implementation, and management of technology-based solutions to improve our clients’ data ecosystem and overall delivery.

Responsibilities

• Participate in full software development lifecycle implementing, testing and maintaining custom data solutions
• Design, develop, and deploy machine learning models, with a strong emphasis on LLMs for diverse NLP applications.
• Lead the fine-tuning of pre-trained LLMs for specific downstream tasks, optimizing for performance and domain relevance.
• Implement and explore model quantization techniques to reduce model size and inference latency, enabling efficient deployment on various hardware.
• Conduct thorough experimentation and evaluation of model performance, ensuring robustness and accuracy.
• Collaborate with data scientists and software engineers to integrate ML models into production systems and MLOps pipelines.
• Act as a technical consultant for the client
• Work as a key member of an Agile Team


Requirements:
• BS/MS degree in Computer Science, Engineering or related field (mandatory)
• Minimum of 5 years of relevant experience on Data Science or Machine Learning roles using Python and Python Libraries (PySpark, Numpy, Scikit-Learn etc.) & LLM domains
• Strong skills working with algorithms, computational complexity, statistics and ML/AI techniques
• Experience in working with large datasets (SQL/NoSQL)
• Familiarity with cloud technologies, ideally the Azure environment and Databricks
• Experience on Airflow will be considered as a plus
• Understanding of software applications' fundamental principles, communication methods, and their impact on users’ experience
• Very Good Testing & Quality Assurance skills
• Good programming skills with a mindset of solving hard problems efficiently with creativity
• Communication & Time Management Skills
• Able to work independently and as part of a group
• Analytical thinking & Problem-Solving Attitude
• Knowledge of Microsoft Office
• Languages required: English and Greek, both written and verbal


Benefits:
• Professional development through participation in challenging, real business projects in different industries.
• Working in a dynamic and fast-growing Technology Company with recognized partners.
• Opportunity to work in a diverse environment with talented colleagues.
• Competitive remuneration package.
• Private Health Insurance.
• Training & Development.
• Flexible Working Environment.

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