I applied through a staffing agency. I interviewed at FNZ (Gurgaon, Haryana) in Feb 2026
Interview
The interview revolved around two panelists, and I was referred through a recruiting agency. It primarily focused on core concepts of OOP, system design, microservices, and database design. Additional discussions included SOLID principles, design patterns, C#/.NET fundamentals, REST APIs, dependency injection, asynchronous programming, SQL query optimization, indexing, Entity Framework, event-driven architecture, message queues, caching strategies, cloud concepts, scalability, performance optimization, CI/CD practices, and real-world problem-solving scenarios based on previous project experience. The interviewers were interested in both theoretical understanding and practical application of these concepts in production environments.
Interview questions [1]
Question 1
Design patterns in C#
SOLID principles and design patterns
Dependency Injection and Inversion of Control
CI/CD pipelines and DevOps practices
High-level system design scenarios involving scalability, availability, and fault tolerance
Positive experience . Basic backend questions and One question at the end to test analytical ability. Question around DI, IOC, design pattern, polymorphism, OOPS, Second round is face to face interview.
I applied online. The process took 1 week. I interviewed at FNZ (Wellington, Wellington) in Mar 2023
Interview
The interview was conducted in March 2023 by two interviewers and lasted for one hour. It focused entirely on theoretical questions, with no hands-on tasks, coding, or practical problem-solving involved.
Interview questions [1]
Question 1
How to write unit testing
How to write maintainable code
How to do code reviews
What should have in the code to write unit testing
Hashing passwords
Encryption and encoding difference
Interface and abstract class difference
SQL indexing
SQL transaction scope
Parametrize sniffing in SQL
Cross site request forgery /what/how to fix
Sql injection -what how to fix
What is reflection
Dependency injection
Builder pattern/ singleton
get and post method difference in format
Difference in patch and put in rest api
Difference between struct and class