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senior data scientist – graph machine learning

Nov 10, 2026 · XM

Νομός Θεσσαλονίκης·Nov 10, 2026
Νομός ΘεσσαλονίκηςHybridΠληροφορικήPermanentFull Time
JOBILY AI SUMMARY

What you'll do

  • Design, develop, and deploy Graph Neural Networks (GNNs) and graph-based machine learning solutions
  • Transform complex datasets into graph representations and extract insights using graph algorithms and statistical techniques
  • Identify new Graph AI use cases and contribute to the data science strategy
  • Communicate technical concepts and model outcomes to technical and business audiences
  • Maintain standards in data preparation, feature engineering, model evaluation, documentation, and code quality
  • Use Python, graph databases, and cloud-based data platforms to build data solutions
  • Apply best practices in data quality, model monitoring, version control, and reproducible analytics
  • Lead and supervise data scientists working on graph-related tasks
  • Partner with technical teams, Product Managers, and business stakeholders to develop scalable Graph AI solutions

Key requirements

  • 6+ years' experience
  • Graph AI & machine learning: Graph Neural Networks (GNNs), machine learning and AI, graph algorithms
  • Data science: Data science, data preparation, feature engineering, model evaluation, statistical techniques
  • Programming & analysis: Python, Pandas, NumPy
  • Graph data: Graph databases, graph query languages, relational and non-relational databases
  • Visualization: Data visualization
  • Mathematics / Physics / Computer Science / Engineering / Data Sciencepreferred

Benefits

  • Attractive remuneration package with performance-related reward, private health insurance, and a corporate pension fund.
  • The company offers an intellectually stimulating work environment, continuous personal development, and international training opportunities.

About the job

We are looking for a Senior Data Scientist specializing in Graph AI to join our growing Data Science team. In this role, you will design and deploy production-grade graph machine learning solutions, working with Graph Neural Networks (GNNs), graph databases, and large-scale datasets to solve complex real-world problems.  

You will play a key role in shaping the company's Graph AI capabilities, collaborating with cross-functional teams and mentoring other data scientists while delivering innovative, business-impacting solutions.

The main responsibilities of the position include:

  • Design, develop, and deploy Graph Neural Networks (GNNs) and graph-based machine learning solutions  

  • Transform large, complex datasets into graph representations and extract actionable insights using advanced analytics, graph algorithms, and statistical techniques.  

  • Drive the adoption of Graph AI across the organisation by identifying new use cases and contributing to the evolution of the company's data science strategy. 

  • Communicate complex technical concepts and model outcomes clearly to both technical and business audiences. 

  • Ensure high standards in data preparation, feature engineering, model evaluation, documentation, and code quality.  

  • Leverage technologies such as Python, Graph Neural Networks, graph databases, modern ML frameworks, and cloud-based data platforms to build innovative data solutions 

  • Ensure adherence to best practices in data quality, model monitoring, version control, and reproducible analytics   

  • Lead and supervise a team of data scientists working on graph-related tasks 

  • Partner closely with Data Engineers, Software Engineers, Product Managers, and business stakeholders to translate business challenges into scalable Graph AI solutions.  

 

Main requirements:

  • University degree in Mathematics, Physics, Computer Science, Engineering, Data Science, or a related quantitative field  

  • At least 6 years of experience in data science, machine learning and AI, including hands-on experience in designing, training and optimising Graph Neural Networks (GNNs) for production applications. 

  • Experience working with relational and non-relational databases 

  • Solid experience working with graph databases (e.g., Neo4j, Neptune) and proficiency in graph query languages (e.g., Cypher or Gremlin). 

  • Experience with data visualization tools such as Matplotlib, Seaborn, or Plotly 

  • Strong programming skills in Python and experience with Pandas, NumPy, and similar data analysis libraries  

  • Strong analytical thinking, problem-solving ability, and attention to detail. 

  • Excellent communication skills and the ability to work collaboratively in a team environment 

  • Fluent in English 

Benefit from:

  • Attractive remuneration package plus performance related reward 

  • Private health insurance 

  • Corporate pension fund 

  • Intellectually stimulating work environment 

  • Continuous personal development and international training opportunities 

The Hiring Experience: What Awaits You

  • Let’s Connect – Intro Chat with Talent Acquisition 

  • Deep Dive – First Interview with Your Future Team 

  • Bring It to Life – Role-Specific Take-Home Task 

  • Final Connection – Final Interview 

All applications will be treated with strict confidentiality!

About the company

We Give Every Client the Best Possible Trading Experience

Every client, regardless of account size, gets access to the same excellent trading conditions. Everyone who chooses XM has the same opportunity to pursue their investment goals.


Join Us

We pioneered the strict no requotes, no rejections policy that established our reputation. To prevent slippage and keep your strategy aligned with real-time market prices, 99% of all trades are executed in less than one second.

Workplace
Hybrid
Sector
Πληροφορική
Employment Type
Permanent
Work Time
Full Time

About the company

We Give Every Client the Best Possible Trading Experience

Every client, regardless of account size, gets access to the same excellent trading conditions. Everyone who chooses XM has the same opportunity to pursue their investment goals.


Join Us

We pioneered the strict no requotes, no rejections policy that established our reputation. To prevent slippage and keep your strategy aligned with real-time market prices, 99% of all trades are executed in less than one second.