Solutions Architect Interview Questions UK: 8 Real Questions and What Interviewers Want

Applying for a Solutions Architect job in the UK? Here is what you are likely to be asked. These questions come from our Solutions Architect question bank of 16 questions, written for UK employers at senior level.

Eight Solutions Architect interview questions, and what the interviewer is thinking

1. How do you approach designing a solution architecture from a set of business requirements?

Why they ask: This reveals the architect's method, from requirements through to a defensible design.

2. How do you define and then validate non-functional requirements such as scalability, resilience and security?

Why they ask: Non-functional requirements are where architecture decisions carry most weight and many designs fail.

3. When would you recommend microservices, and when would you recommend a modular monolith or an event-driven design?

Why they ask: They want balanced architectural judgement rather than following trends.

4. How would you design the integration between several core systems, and what patterns would you consider?

Why they ask: Integration is a daily architectural concern and a source of many failures.

5. What principles would you apply when migrating a legacy on-premises application to the cloud?

Why they ask: Migration strategy is a common solutions architect responsibility with significant risk and cost.

6. The development team wants to use a new technology you consider risky for a critical programme. How do you handle it?

Why they ask: This tests influence, technical judgement and collaboration with engineers.

7. Tell me about a time you led the design of a complex solution. What were the key decisions and the outcome?

Why they ask: They want to see real-world delivery of an architecture, not just theory.

8. What does a Solutions Architect do day to day, and how does it differ from an enterprise architect or a technical lead?

Why they ask: They want to confirm you understand where the role sits and what it demands.

A sample answer to question 1

How do you approach designing a solution architecture from a set of business requirements?

I start with the problem, not the technology. I'd meet the sponsor and key stakeholders to understand the business outcomes, constraints, budget, timescales and risks, and separate functional from non-functional requirements such as availability, security, performance and compliance. I'd then identify options, usually two or three, and compare them against weighted criteria including cost, risk, fit with the existing estate and the team's skills. I'd create views for different audiences: a context and conceptual diagram for executives, and logical and physical designs for engineers, using C4 or ArchiMate notation. Key choices go into architecture decision records so the reasoning survives staff changes. I'd validate with a proof of concept for the riskiest assumptions, then take the design through a design authority or architecture review board. During delivery I stay involved to make sure what is built matches the intent, and manage any deviations.

Common mistake to avoid: Jumping to a favoured tech stack; Producing one diagram for everyone

Want the rest?

Full model answers, key points and common mistakes for all 16 questions are on the Solutions Architect interview questions page. The first five are free, no sign-up needed.