🔧 Technical Interview Questions (Full Stack Focus)
1. Describe your experience with .NET Core and how it aligns with .NET 9.
Answer:
I've worked extensively with .NET Core from version 2.1 up to .NET 6 in enterprise projects, building RESTful APIs, microservices, and background services. I’ve followed the transition to .NET 9, particularly its performance improvements and native AOT (Ahead-of-Time compilation). I’m comfortable leveraging features like minimal APIs, source generators, and better integration with cloud-native patterns in .NET 9.
2. What is your experience with Entity Framework and managing database migrations?
Answer:
I’ve used both EF Core code-first and database-first approaches. I'm proficient in handling migrations using the CLI (dotnet ef migrations add/update) and in managing performance by optimizing LINQ queries and using AsNoTracking when needed. I also use raw SQL where EF might not be optimal.
3. How do you handle authentication and authorization using Microsoft Entra ID (Azure AD)?
Answer:
I've implemented Azure AD-based authentication using OpenID Connect and MSAL libraries in both front-end (React) and backend (.NET) apps. I manage scopes, tokens, and role-based access control using Entra ID, and have configured app registrations, redirect URIs, and permission grants in Azure Portal.
4. What’s your approach to integrating external platforms like ServiceNow or Dynamics?
Answer:
For ServiceNow and Dynamics, I typically work with their REST APIs or SDKs. I’ve implemented authentication flows using OAuth 2.0, written service wrappers, and scheduled sync jobs in Azure Functions or Logic Apps for real-time or batch integration, depending on SLAs and data sensitivity.
5. Can you describe a ReactJS project you’ve worked on, especially one using Azure services?
Answer:
In a recent project, I built a ReactJS-based dashboard for monitoring user support tickets, integrated with Azure Functions (as backend APIs) and Azure Table Storage. I used React Query for state management, Azure AD for auth, and Azure Blob Storage for exporting reports.
6. How do you ensure privacy and security in your applications, especially with tools like ZebraAI or a PII scrubber?
Answer:
I implement strong logging and data classification strategies, using data masking or redaction for PII. In apps involving AI tools like ZebraAI, I wrap sensitive data processing with secure endpoints, leverage Azure Key Vault, and always follow least privilege principles when accessing data.
7. Have you used Azure Logic Apps? Give an example.
Answer:
Yes, I’ve used Logic Apps to automate incident response workflows. For example, a user creates a support ticket, Logic Apps triggers an approval flow, sends Teams notifications, and logs the outcome to a database. It integrates well with connectors like Outlook, SQL, and SharePoint.
8. What’s your experience with modern DevOps practices in .NET and React projects?
Answer:
I use GitHub Actions and Azure DevOps pipelines for CI/CD. I containerize apps with Docker and deploy to Azure App Services or AKS. I also use infrastructure-as-code with Bicep or Terraform and automate quality gates like unit testing and SonarQube analysis.
🤝 Behavioral / Situational Questions
1. Tell me about a time you had to ramp up quickly on a new system.
Answer:
At a previous role, I joined a project involving a legacy CRM system with complex integrations. Within 2 weeks, I mapped key data flows, reverse-engineered undocumented APIs, and began contributing to bug fixes. My ramp-up strategy involves deep dives into code, documenting assumptions, and shadowing SMEs.
2. How do you handle cross-functional communication with PMs, Directors, and TPMs?
Answer:
I tailor my communication style: high-level summaries for directors, technical deep-dives for peers, and clear deliverables for PMs. I make use of visual aids like architecture diagrams or flowcharts to ensure alignment during planning or troubleshooting sessions.
3. Describe a challenging bug you solved.
Answer:
We once had a race condition in a multi-threaded API endpoint. It passed QA but failed in production under load. I added thread-safe collections and used locking strategies, then validated with load testing. This fix prevented data corruption and increased stability.
🌐 Preferred/Bonus Questions (based on JD preferences)
1. Do you have experience with Blazor?
Answer:
Yes, I’ve experimented with Blazor WebAssembly and am excited by its potential to replace JS-heavy frontends. I appreciate its tight integration with .NET and reuse of validation logic across front-end and back-end.
2. How do you ensure accessibility in your front-end code?
Answer:
I use semantic HTML, ARIA attributes, and test apps with screen readers. I also follow WCAG 2.1 standards and run audits using Lighthouse and Axe. Accessibility is part of our Definition of Done in frontend stories.
3. What makes you a good fit for a role where you work independently?
Answer:
I’m self-driven, schedule-focused, and proactive in resolving blockers. I maintain documentation, over-communicate in async setups (via Teams, Jira, Confluence), and always keep stakeholders informed about progress and risks.
Would you like me to generate a mock interview or prepare a study guide based on these questions?