Lead Data & AI Architect – Agentic Tax Workflows

EY; Madrid; Presencial; EUR 100.000 - 130.000; Jornada completa

Descripción de la vacante

EY is looking for a Data & AI Lead in Madrid, responsible for architecting AI-ready tax workflows and overseeing data ingestion. The ideal candidate has 15+ years in data architecture and engineering, with strong skills in AI tooling and data governance.

This role requires excellent communication and problem-solving skills, alongside practical experience with modern data platforms. EY promotes an equitable recruitment process, offering accommodation for disabilities during interviews.

Formación

• 15+ years of experience in data architecture and engineering.
• Hands-on experience with AI/ML in production environments.
• Strong grounding in data governance and large-scale data integration.

Responsabilidades

• Design workflows for tax processes using AI-driven methodologies.
• Lead data transformation from ERP systems and external sources.
• Act as technical authority in developing reference architectures.

Conocimientos

Data architecture

Data engineering

AI tooling

SQL databases

Programming languages (C++, Java, Python)

Communication skills

Problem-solving skills

Educación

Bachelor's degree in computer science or engineering

Advanced certifications in AI or data engineering

Herramientas

Azure ML

Databricks

MLflow

LangChain

LangGraph

Descripción del empleo

• task‑level agent responsibilities
• semi‑structured documents

At EY, we’re all in to shape your future with confidence.

We’ll help you succeed in a globally connected powerhouse of diverse teams and take your career wherever you want it to go.

Join EY and help to build a better working world.

The opportunity

EY’s Global Tax Centre of Excellence Data & AI team play a prominent role in leading client transformation initiatives that leverage Data & AI as core capabilities. The CoE seeks to architect reusable patterns and process blueprints to bootstrap scalability across all the EY Tax technology teams in all key markets.

You will have an existing opportunity to stay on the leading edge of technology development and to contribute to the successful transformation of EY tax and its clients.

Role Purpose

The Data & AI Lead role is responsible for designing and architecting agentic tax workflows, underpinned by AI‑ready data products and robust data engineering.

This role sits at the intersection of:

• Tax domain understanding
• Data architecture and engineering
• Applied AI and agent orchestration
  
  

It ensures that agents are fed with trusted, timely, well‑structured data and are deployed in a way that scales across clients and platforms.

Key Responsibilities but not limited to:

Agentic Workflow & AI Design

• Design agentic workflows for tax processes, including:
• task‑level agent responsibilities
• agent‑to‑agent communication patterns
• human‑in‑the‑Loop and escalation models
• feedback loops and agent performance monitoring and evaluations
• Define reusable agent blueprints aligned to Lean‑derived task definitions
• Apply leading edge agentic driven design and build methodologies eg. use of Codex, Factory ai, GitHub Copilot
  

Data Architecture & AI‑Ready Data Products

• Design and oversee the build of AI‑ready data marts that:
• expose tax data at the right grain
• maintain lineage and quality controls
• support deterministic and probabilistic reasoning
• Lead data ingestion and transformation from:
• ERP systems
• tax platforms
• semi‑structured documents
• external data sources
  

Agent Governance & Security

• Apply design led thinking to embed agent and workflow governance and security:
• Ensure compatibility and integration with client’s governance models and technology (eg. Microsoft Agent 365)
• Design and embedded real time controls and risk monitoring
  

Platform Strategy

• Architect solutions deployable:
• within client environments (e.g. ServiceNow with workflow‑orchestrated agents), and
• within EY‑hosted platforms
• Ensure EY retains reusable IP through:
• agent blueprints
• data mart patterns
• orchestration logic
• delivery assets eg. design and build agents
• security & governance blueprints
  

CoE & Asset Development

• Act as technical authority within the CoE
• Develop reference architectures, patterns, and accelerators
• Support PoCs, pilots, and scaled deployments
  
  

Required Experience & Background

• Bachelor's degree in computer science engineering or equivalent work experience. Advanced certifications in AI, machine learning, cloud computing or data engineering are highly advantageous.
• 15+ years’ experience across data architecture, data engineering, and analytics including building SQL database, database designing and data modelling.
• Hands-on experience with modern data platforms and AI tooling such as Azure ML, Databricks, MLflow, LangChain, LangGraph.
• Strong grounding in:
• data modelling
• data governance and quality
• large‑scale data integration
• Hands‑on experience applying AI/ML or advanced analytics in production environments
• Proficient in programming or scripting languages: for instance, C++, Java, Python and key ML libraries (e.g. PyTorch, PySpark, scikit-learn, Hugging Face Transformers).
• Comfortable working with both business stakeholders and data & ai engineers
• Experience shaping technical strategy and operating models
• Strong verbal and written communication skills
• Excellent problem solving skills and unsatiable desire to learn and keep up with technology developments.
  
  

Desirable Experience

• Prior work in Tax Technology or Finance platforms
• Experience with agentic AI concepts, orchestration, or workflow‑driven automation
• Exposure to cloud‑based data platforms and modern AI stacks
  
  

Success Measures

• Quality and reusability of AI‑ready data marts
• Stability and scalability of agent deployments
• Speed from Lean design to working agent
• Reuse of assets across clients and service lines
  
  

What We Offer You

At EY, we’ll develop you with future-focused skills and equip you with world-class experiences. We’ll empower you in a flexible environment, and fuel you and your extraordinary talents in a diverse and inclusive culture of globally connected teams. Learn more.



Are you ready to shape your future with confidence? Apply today.



To help create an equitable and inclusive experience during the recruitment process, please inform us as soon as possible about any disability-related adjustments or accommodations you may need.

EY | Building a better working world

EY is building a better working world by creating new value for clients, people, society and the planet, while building trust in capital markets.

Enabled by data, AI and advanced technology, EY teams help clients shape the future with confidence and develop answers for the most pressing issues of today and tomorrow.

EY teams work across a full spectrum of services in assurance, consulting, tax, strategy and transactions. Fueled by sector insights, a globally connected, multi-disciplinary network and diverse ecosystem partners, EY teams can provide services in more than 150 countries and territories.