Microsoft Senior Software Engineer Interview Experience — A Screen and Four Hiring-Event Rounds

The report describes a senior software engineering interview for Microsoft’s Intelligent Conversation and Communications Cloud organization. A technical screen in late August preceded a four-round hiring event in mid-September. The screen combined a three-number sum problem with a question about resolving disagreement.

The first event round examined a thread-safe executor that preserves task order per key while limiting overall concurrency, followed by changing project requirements. The second covered duplicate detection, production incident response, individual responsibility, and technical disagreement. The remaining rounds asked for a business receptionist supporting voice and chat, and a global mobile voice-calling service. Follow-ups explored human handover, product evolution, quality evaluation, service boundaries, and detailed request flows. The report identifies IC3 as the organization’s name, not the job level, and provides no hiring outcome.