Data Engineer

GWI
Athens, Greece
On-site

Who this role is best for

Aimed at mid-senior Data Engineers who can build and maintain cloud-based data pipelines and collaborate with analysts and stakeholders.

Best fit for

  • Candidates with mid-senior experience in cloud data stacks and a collaborative mindset working with analysts and stakeholders
    — “you’ll work closely with colleagues across GWI”
  • Individuals who have delivered impactful data engineering solutions with SQL and Python expertise
    — “a strong track record of impactful delivery as a Data or Analytics Engineer”
  • Professionals comfortable with AI-assisted development tools and data quality assurance practices
    — “comfort using AI-assisted development tools while reviewing and testing their output with care”

Things to consider

  • Hybrid work arrangement requires at least one day per week in the office in Athens
    — “Weekly office requirement: Hybrid, 1 day/week”
  • The role demands strong data governance and documentation skills for internal and external use
    — “data accessibility, cataloguing and quality assurance”

How to stand out

  • Emphasize experience with end-to-end data pipelines and cloud data stacks like BigQuery and Airflow
    — “hands-on experience with ingestion, orchestration, modelling, transformation and data quality on a cloud data stack”
  • Highlight your ability to design analytics-ready data models with clear lineage and documentation
    — “Designing analytics-ready data models with clear lineage and documentation”
  • Showcase your understanding of optimizing warehouse performance and cost
    — “Optimising warehouse cost and performance through query tuning”
  • Demonstrate your experience with managing secure data access and AI tooling integration
    — “Managing data access so the right people and AI assistants can securely find”
Pace · Fast PacedCollaboration · HighAutonomy · MediumDecision Impact · Team

Derived from job-description analysis by Serendipath's career intelligence engine.

What success looks like

  • reliable data pipelines
  • clear data models
  • optimized warehouse performance
Typical background
data engineeringdata sciencesoftware engineering

Skills & requirements

Required

Data EngineeringSQLPythonCloud Data StackData Quality PracticesData Governance

Preferred

Ai-assisted Development ToolsData For AI Use Cases

Stack & domain

SQLPythonBigQueryAirflowdbtGitCI/CDLlm-based ToolingIndependenceCollaborationCommunicationData EngineeringAICloud Data Stack

About the role

Original posting from GWI via Greenhouse

Weekly office requirement: Hybrid, 1 day/week

Employment type: Permanent, full-time, employee

Linked Seniority level: Mid-Senior

Every business is using AI. The ones that get it right start with real people. GWI is the human intelligence underneath: verified data that helps businesses understand what moves their audience, and act on it faster. If you want your work to matter, keep reading.

What will I be doing?

As our Data Engineer you’ll maintain and enhance the Business Data Platform that sits at the heart of our BI Engineering team, serving analytics built on GWI’s internal data to the wider business so it can make confident decisions. You’ll work closely with colleagues across GWI to keep pipelines dependable, data models clear and analytics-ready, and data securely accessible across dashboards and AI tooling.

The accuracy and accessibility of our data shape how we measure performance, plan ahead and adopt AI-assisted analytics, so your work directly supports GWI’s goal of putting consumer insights at the heart of every organisation.

A few things you’ll be responsible for:

Building and running reliable, well-monitored data pipelines, infrastructure and warehouse, backed by strong testing and data quality practices.

Designing analytics-ready data models with clear lineage and documentation, in close partnership with analysts and stakeholders.

Optimising warehouse cost and performance through query tuning, efficient data modelling and careful resource management.

Managing data access so the right people and AI assistants can securely find, understand and use trusted, well-documented data.

Working at GWI means a high tempo environment where change is common. We’re building quickly because the industry is moving quickly, and our customers rely on us to stay ahead. If you like being part of that, you’ll enjoy it here.

What do I need to bring with me?

You’ll need to be able to demonstrate the core skills this role requires. You don’t have to tick all the boxes right away; the important thing is that you’re willing to learn.

Data engineering experience: a strong track record of impactful delivery as a Data or Analytics Engineer, with proficiency in SQL and Python.

End-to-end pipelines: hands-on experience with ingestion, orchestration, modelling, transformation and data quality on a cloud data stack, such as BigQuery, Airflow and dbt (or equivalents).

Engineering practices: Git, code reviews, testing, documentation and CI/CD, plus comfort using AI-assisted development tools while reviewing and testing their output with care.

Data governance: knowledge of data accessibility, cataloguing and quality assurance.

Independence and collaboration: you can scope, estimate and deliver work independently in an Agile environment, and you communicate well with analysts and stakeholders.

A plus: exposure to preparing data for AI use cases, such as semantic and metrics layers, well-documented models, and LLM-based tooling (RAG, embeddings, vector databases).

#li-hybrid

#LI-NIKOSSS1

Source: GWI careers (Greenhouse)

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