Izertis Software Engineer interview questions & guide 2026

The interview questions you will encounter at Izertis are highly reflective of the specific client project or technical domain you are being considered for. Because the company hires for both specialized infrastructure roles and general software delivery, questions are designed to assess your practical troubleshooting abilities, domain knowledge, and client-readiness.

The following questions are compiled from real interview experiences to help you understand the patterns and topics you are most likely to face.

Technical & Infrastructure Domain

These questions assess your deep technical knowledge in specialized areas like networking, security protocols, and systems engineering, which are critical for infrastructure-focused roles at Izertis.

• How do you design and configure a secure Identity and Access Management (IAM) workflow for an enterprise client with legacy directory systems?

Preparing for an interview at Izertis requires a strategic shift from typical product-company preparation. Rather than focusing solely on abstract algorithmic puzzles, you must demonstrate your readiness to deliver immediate value to external clients and navigate complex project ecosystems.

To stand out, align your preparation with these core evaluation criteria:

Client-Ready Communication – You must prove that you can represent Izertis professionally in front of high-profile clients. This means translating complex technical concepts into clear business terms, actively listening to stakeholder needs, and demonstrating a diplomatic approach to conflict resolution.

Technical Versatility – While deep expertise in a specific stack is valuable, Izertis highly prizes engineers who can pivot. Show that you have a strong foundational understanding of software engineering and infrastructure principles, allowing you to pick up new tools, frameworks, and legacy systems rapidly.

Administrative & Process Compliance – Especially for public sector projects, compliance and attention to detail are critical. Show that you are comfortable following structured processes, documenting your work meticulously, and providing the necessary formal documentation required for public tenders.

The interview process at Izertis is highly decentralized and varies significantly depending on whether you are being hired for a general internal pool, a specific corporate client, or a public administration tender. Candidates generally experience one of two tracks: an ultra-fast client-matching process or a slower, tender-dependent evaluation.

For urgent client vacancies, the process can be incredibly rapid, sometimes concluding in less than a week with minimal technical testing. Conversely, if your profile is being submitted as part of a public bid (such as for justice or defense departments), the timeline is dictated by public administration bureaucracy, which can introduce significant delays.

The timeline above illustrates the standard progression from initial contact to onboarding. Candidates should interpret this as a flexible framework; if you are interviewing for an active, high-priority client project, the technical test and client review phases may be consolidated into a single, informal technical discussion to expedite your placement.

To succeed at Izertis, you must understand the specific competencies evaluated during the technical and management conversations. Depending on the exact role—such as Network Engineer, IAM Engineer, or general Software Engineer—your evaluators will focus on distinct technical pillars.

Infrastructure & Systems Engineering

For specialized engineering roles, the technical evaluation focuses heavily on your ability to design, secure, and maintain complex enterprise environments.

Be ready to go over:

• Identity & Access Management (IAM) – Single Sign-On (SSO) integrations, directory services (Active Directory, LDAP), and modern authentication protocols (SAML, OIDC, OAuth 2.0).
• Network Architecture – Enterprise routing, switching, VPN configurations, and hybrid cloud connectivity.
• Support & Troubleshooting – Systematic root-cause analysis for network outages, permission failures, and performance bottlenecks.

Example scenarios:

• Designing an IAM strategy for a client migrating from on-premise infrastructure to a hybrid cloud model.
• Troubleshooting a routing loop in a multi-site corporate network under time pressure.

Public Sector & Enterprise Delivery

When interviewing for projects within public administration (such as Spanish Justice or ISDEFE), evaluators look for candidates who can handle the rigid compliance and scale of government systems.

Be ready to go over:

• Legacy System Integration – Strategies for wrapping, migrating, or interfacing with older, highly sensitive databases and mainframe applications.
• Data Security & Compliance – Adherence to local and national data protection regulations (such as GDPR or national security frameworks).
• Rigorous Documentation – Writing clear technical specifications, system manuals, and compliance reports required by public administrators.

Example scenarios:

• Explaining how you would secure sensitive citizen data during a major database migration.
• Describing your approach to onboarding onto a massive, pre-existing codebase with outdated documentation.

Technical Adaptability & Autonomy

Because consulting environments can be unpredictable, hiring managers look for self-starters who do not require constant supervision to deliver high-quality code or infrastructure.

Be ready to go over:

• Rapid Upskilling – Your proven methodology for learning a new language, tool, or framework in days rather than weeks.
• Autonomy in Delivery – How you establish development standards and maintain high code quality when working on client sites with loose oversight.
• Scope Management – Identifying and managing "scope creep" from clients while maintaining a collaborative relationship.

Example scenarios:

• A scenario where you are assigned to a client project using a proprietary framework you have never seen, and you must deliver a feature within your first week.
• Handling a situation where the client's internal IT team is slow to grant you administrative access, stalling your development progress.

As a Software Engineer at Izertis, your daily activities will blend technical execution with client management. You are not just writing code in isolation; you are representing the technical capabilities of Izertis directly to the client.

Your core responsibilities will typically include:

• Designing, developing, and deploying software and infrastructure solutions that align with client specifications and Izertis quality standards.
• Collaborating closely with client-side stakeholders, project managers, and internal teams to gather requirements and define project scopes.
• Troubleshooting complex technical issues across diverse environments, from local development setups to production-grade cloud and on-premise networks.
• Participating in the technical preparation of bids and tenders for public administration and large enterprise accounts.
• Documenting system architectures, API contracts, and deployment processes to ensure seamless handovers to client operations teams.

Because Izertis services a wide array of clients, the ideal candidate profile balances core technical competence with strong professional soft skills.

Technical Qualifications

• Must-have skills – Strong foundational knowledge in your primary domain (e.g., Java, .NET, or Python for software roles; Cisco, Fortinet, or major IAM suites for infrastructure roles).
• Must-have skills – Experience working with relational databases (SQL) and basic cloud infrastructure concepts (AWS, Azure, or GCP).
• Nice-to-have skills – Experience working on public sector projects or frameworks (such as ISDEFE or Spanish Justice environments).
• Nice-to-have skills – Professional certifications in networking (CCNA/CCNP), security, or cloud architecture.

Professional & Soft Skills

• Strong communication skills in the local language of the client (e.g., Spanish for Spain-based projects, Portuguese or English for Lisbon-based roles).
• High adaptability and a proven track record of successfully navigating ambiguous or rapidly changing project requirements.
• Strong organizational skills, with the ability to manage your time effectively when split between client demands and internal company reporting.

Q: How difficult is the technical interview at Izertis? A: The difficulty varies significantly. For urgent client placements, the technical evaluation is often a practical, high-level discussion of your past projects and CV, making it relatively straightforward. For highly specialized roles (like IAM or Network Security), expect a more rigorous, scenario-based technical deep dive.

Q: Will I be working at the Izertis office or on-site with the client? A: This depends entirely on the project. Many roles offer hybrid or fully remote options, but projects with public administrations or highly secure environments (such as defense or justice) may require regular on-site presence at the client's offices.

Q: What happens if a client project ends? A: As a permanent employee of Izertis, if a client project concludes, you will typically enter a "bench" period where you assist with internal projects, training, or the preparation of new client bids until you are reassigned to a new client engagement.

Q: Why does the recruitment process sometimes take several weeks? A: When Izertis recruits for public tenders, the timeline is bound to the client's bidding process. If Izertis is bidding for a contract, they must gather candidate profiles to present in their proposal. The final hiring decision can only be made once the tender is officially awarded.

To maximize your chances of securing an offer at Izertis, keep these practical, insider tips in mind during your preparation and interview stages:

• Clarify the project status early: In your first call with the recruiter, ask whether the role is for an already-won, active client project or if it is part of a proposal for an upcoming tender. This will give you realistic expectations regarding the hiring timeline.

• Highlight your adaptability: During behavioral interviews, emphasize your ability to learn quickly and work across different technology stacks. Avoid positioning yourself as a single-technology specialist unless you are interviewing for a highly specific role like IAM.

• Prepare your official documentation: If you are interviewing in Spain, have your "vida laboral" and academic diplomas ready. Having these documents on hand can dramatically speed up your onboarding, especially for public sector clients.

• Be proactive with follow-ups: Because recruiters at consulting firms handle a high volume of active processes across multiple clients, do not hesitate to send a polite follow-up email weekly to keep your application top-of-mind.

A Software Engineer position at Izertis offers an exceptional opportunity to expand your technical breadth, work on high-impact public and private sector projects, and develop a highly versatile skill set. By preparing for a consultative, practical, and adaptable evaluation rather than a rigid academic coding test, you can position yourself as a highly desirable candidate ready to deliver value on day one.

Focus your preparation on demonstrating your core technical fundamentals, your ability to communicate effectively with external stakeholders, and your readiness to adapt to new environments. With the right preparation and a clear understanding of the consulting business model, you can navigate the interview process with confidence.

The salary data reflects the competitive market rates for engineering talent in regional hubs such as Lisbon and Spain. Depending on your specialization—such as IAM or advanced network engineering—and the specific requirements of the client project, there may be room to negotiate additional allowances or performance-based incentives.

To explore more detailed interview experiences, real-time salary updates, and specific preparation resources for your upcoming interviews, visit Dataford. Good luck with your preparation!