Overview
Microsoft Advertising makes billions of decisions every day across search, native, shopping, display, audience, and AI-powered advertising experiences.
We are looking for a Principal Software Architect to define the technical direction for Ads Quality at global scale.
Quality decisions can depend on ads, landing pages, advertisers, businesses, account history, behavioral patterns, and signals that may be incomplete, delayed, noisy, or changing. The challenge is to turn this evidence into systems that are accurate, scalable, measurable, and continuously improving.
This is a hands-on software engineering role spanning distributed systems, production AI, decision systems, entity intelligence, agentic workflows, and measurement.

Responsibilities
Define the long-term architecture for Ads Quality across signals, entity understanding, model execution, decisioning, feedback, and measurement.
Establish how quality systems should reason across ads, landing pages, advertisers, businesses, relationships, and behavior over time.




Design architectures that support heterogeneous AI systems including lightweight models, multimodal models, LLMs, agents, and deterministic systems.
Define how evidence, model outputs, confidence, calibration, thresholds, and decision policies come together in production.
Set technical direction across real-time, nearline, and offline systems, balancing quality, latency, freshness, cost, and reliability.
Drive convergence where common abstractions create leverage and challenge unnecessary duplication or complexity.
Partner with Applied Science on how current model capabilities should shape system architecture.
Prototype difficult ideas when that is the fastest way to establish technical feasibility.
Influence implementation through design reviews, architecture guidance, and hands-on engagement with critical systems.

Qualifications
15+ years of software engineering experience, or equivalent technical depth.
Deep experience architecting large-scale

📌 Sr Principal Architect (Bengaluru)
🏢 Microsoft
📍 Bengaluru