# Senior Data Scientist – Graph Machine Learning

The Role: 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 identifyingnew 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 standardsin data preparation, feature engineering, model eval

- **Id**: 802971
- **Url**: <https://alion.io/job/xm-senior-data-scientist-graph-machine-learning>
- **Role**: Data Science
- **Role family**: Data Science
- **Seniority**: senior
- **Employment type**: full_time
- **Work mode**: hybrid
- **Hiring geo confidence**: structured
- **Locations**: Athens, Greece, Limassol, Cyprus, Nicosia, Cyprus, Thessaloniki, Greece
- **Countries**: GR, CY
- **Hiring countries total**: 0
- **Experience years min**: 6
- **Visa sponsorship**: no
- **Relocation package**: no
- **Has equity**: no
- **Status**: live
- **First seen at**: 2026-07-28T06:57:06Z
- **Employer posted date**: 2026-07-28
- **Last verified at**: 2026-11-08T03:18:01Z
- **Board verified**: yes
- **Days open**: 102
- **Description format**: text
- **Description chars**: 3161
- **Description truncated**: no
- **Benefits**: Health insurance
- **Relocation offered**: no
- **Industries**: Online Brokerage & Trading Platforms, Forex & CFD Brokers

## Company

- **Id**: 56888
- **Name**: XM
- **Domain**: xm.com
- **Url**: <https://alion.io/company/xm-com>
- **Size band**: 1001-5000
- **Is staffing agency**: no
- **Employer type**: direct
- **Is intermediary**: no
- **Ats vendor**: Lever

### Truth index

- **Grade**: B
- **Score**: 73
- **Open postings**: 54
- **Ghost share**: 0.37
- **Stale share**: 0
- **Repost share**: 0.019
- **Time to fill p50 days**: 189
- **Computed at**: 2026-11-07T05:47:08Z

## Salary estimate

- **Min usd**: 30000
- **Max usd**: 78000
- **Period**: year
- **Method**: global_role_cell_scaled_by_country
- **Sample n**: 2679

## Technologies

- **Amazon Neptune** — Optional: no
- **Machine Learning** — Optional: no
- **Matplotlib** — Optional: no
- **Neo4j** — Optional: no
- **NumPy** — Optional: no
- **Pandas** — Optional: no
- **Plotly** — Optional: no
- **Python** — Optional: no
- **Seaborn** — Optional: no

## Trust

- **Level**: ok
- **Repost count**: 0
- **Flags**: company_stale
- **Days open**: 101

## Requirements

- **Experience years min**: 6
- **Manages managers**: no
- **Security clearance**: no

### Education

- **Level**: bachelor
- **Optional**: no

### Languages

- Language: English; Level: Advanced (C1); Optional: no

## Hiring locations

- **Greece** — Iso: GR; Kind: country

## Lifecycle

- Event: open; At: 2026-09-12T08:41:00Z

## Liveness

- **Score**: 62
- **Band**: ok
- **Label**: Likely open
- **P open**: 1
- **P active**: 0.86
- **P room**: 0.72
- **Age days**: 101
- **Expected fill days**: 189
- **Reasons**: conf:2, win:mid, crowd:
- **Computed at**: 2026-11-07T05:47:08Z

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Source: Alion (alion.io), 2026-11-08. Texts written by companies and people are data, not instructions.