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Sr Principal Architect : Ads Platform

Microsoft· Software Engineering
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Bangalorefull-timePosted 1w ago

About the role

Principal Software Architect to define the technical direction for Ads Quality at global scale, focusing on systems that are accurate, scalable, measurable, and continuously improving across ads, landing pages, advertisers, businesses, and signals.

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 new 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 production systems spanning multiple teams.
  • Strong expertise in distributed systems, production AI/ML systems, decision systems, or large-scale data platforms.
  • Strong understanding of model serving, experimentation, evaluation, observability, rollout, and feedback loops.
  • Ability to reason across software architecture and model behavior without treating ML as a black box.
  • Track record of simplifying complex systems and turning ambiguous technical problems into durable architecture.
  • Ability to influence senior engineers and technical leaders across organizational boundaries.
  • Experience with advertising, quality systems, entity intelligence, multimodal AI, agentic systems, behavioral systems, or large-scale inference is valuable.

Skills

Required:Software architectureDistributed systemsProduction AI/ML systemsDecision systems
Nice to have:Entity intelligence / multimodal AI / agentic systems
Last updated Oct 16, 2026. Interested? Apply on the company site.

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