Sigma Software interview questions

The interview process was quite extensive, but it moved fast, until the final answer (they took a while to share a final answer, and I had to reach out). They provided more detailed feedback at the end, which was great.

The interview was mostly focused on Object-Oriented Programming (OOP) and AdTech. It was very conceptual and technical, with in-depth discussions about core principles, system design, and practical scenarios. The interviewer also explored how these concepts are applied in real-world production systems, including scalability, performance considerations, and trade-offs in architectural decisions.