Preparing for an interview at Izertis requires a dual-track strategy: you must demonstrate sharp technical acumen while showcasing the soft skills necessary for client management. You are not just being evaluated as an execution resource, but as a consultant who can represent the company brand in front of key stakeholders.

To stand out, focus your preparation on the following key evaluation criteria:

Role-Related Knowledge – You must show a deep, practical understanding of data processes. This goes beyond knowing how to build a basic dashboard; you need to explain the "why" behind your data modeling decisions, your approach to ETL (Extract, Transform, Load) processes, and how you ensure data integrity.

Consultative Communication – Interviewers look for your ability to translate technical jargon into clear, business-oriented insights. You should be able to explain complex technical architectures in a way that non-technical business stakeholders can easily grasp and buy into.

Problem-Solving & Structure – When presented with hypothetical client scenarios, structure your thoughts logically. Explain your methodology step-by-step, starting with requirement gathering, moving through technical design, and ending with user adoption and training.

The interview process for a Consultant at Izertis is designed to be highly conversational, transparent, and focused on practical capabilities. Candidates typically experience a streamlined loop that balances cultural fit with technical verification. The company values a relaxed yet professional atmosphere during interviews, allowing you to showcase your true working style.

The process generally unfolds across the following stages:

• Initial HR Screening: A friendly introductory phone call to discuss your background, understand your motivations for joining Izertis, clarify salary expectations, and briefly assess your language skills and general technical knowledge.
• Technical & Hiring Manager Review: An in-depth discussion—either online or in-person at one of their regional offices (such as Bilbao, Madrid, or Gijón)—with an Area Manager, Commercial Director, or technical lead. This stage focuses heavily on your CV, your specific experience in Business Intelligence, and practical scenarios involving data modeling.

While the majority of candidates report a positive and highly engaging experience with polite, professional recruiters, there can occasionally be administrative inconsistencies or delays in communication depending on the regional office and current hiring volumes. Remaining proactive and maintaining polite follow-ups will serve you well.

The timeline above outlines the standard progression from your initial application to the final decision. Use this visual guide to pace your preparation, ensuring you allocate sufficient time to practice both your behavioral stories for the initial screen and your technical deep dives for the manager review.

To excel in the Izertis interview loop, you must understand the core competencies the hiring team evaluates. They want to ensure you can join a client project on day one and deliver value immediately.

Business Intelligence & Data Modeling

This is the technical anchor of the evaluation process for data-focused consulting roles. Your interviewers want to see that you possess strong foundational knowledge of data structures and optimization.

Be ready to go over:

• Power BI Modeling – Designing efficient relationships, managing cardinality (one-to-many, many-to-many), and understanding the impact of model design on report performance.
• Power Query & ETL – Techniques for cleaning, transforming, and merging datasets efficiently before they load into the model to ensure optimal performance.
• DAX Calculations – Writing clean, performant DAX measures and understanding evaluation contexts (filter context vs. row context).
• Advanced concepts (less common) – While tools like Tableau or AWS are occasionally referenced in the wider industry, Izertis interviews for this role tend to focus heavily on the Microsoft BI stack. Do not over-prepare for alternative ecosystems unless specifically requested.

Example scenarios:

• "Explain how you would resolve a performance issue in a Power BI report where visual rendering is taking too long due to underlying data structure issues."
• "Walk me through how you would use Power Query to clean and restructure a highly unformatted, nested Excel dataset for corporate reporting."

Consultative Background & CV Review

Your technical skills are only as valuable as your ability to apply them to real-world business challenges. This evaluation area focuses on your professional journey and client-facing skills.

Be ready to go over:

• Project Delivery Lifecycle – How you take a project from initial client discovery sessions through to deployment and final sign-off.
• Stakeholder Management – Managing expectations, handling scope creep, and communicating technical limitations to business leaders.
• Commercial Awareness – Understanding how your technical solutions impact the client's bottom line and help Izertis build long-term client relationships.

Example scenarios:

• "Describe a situation where a client requested a feature that was technically unfeasible or highly inefficient. How did you guide them toward a better solution?"
• "Walk us through a major BI project on your CV, focusing on the business problem you solved rather than just the tools you used."