Microsoft

Principal Applied Scientist (CoreAI)

Microsoft$165K — $296K *
Information Technology
5 - 7 years of experience
Job Overview by Ladders

Qualifications

  • Bachelor's Degree in Computer Science or related field AND 6+ years technical experience coding in languages such as C++, Java, Python, etc.
  • 6+ years in applied science, machine learning or evaluation systems preferred.
  • Strong background in designing evaluation methodologies for intelligent or distributed systems.
  • Experience with large-scale production data analysis to derive insights.
  • Proficient coding and prototyping skills in Python or similar language.
  • Experience with AI systems evaluation frameworks and benchmarking.
  • Familiarity with agent orchestration frameworks like LangChain or OpenAI SDK.

Responsibilities

  • Develop evaluation frameworks for single- and multi-agent systems focusing on quality and reliability.
  • Design methodologies linking offline evaluations with online signals for performance insights.
  • Define quality benchmarks for agent systems, including coordination quality and user outcomes.
  • Build models to detect regressions and characterize agent behavior effectively.
  • Enhance observability through innovative trace analysis and anomaly detection techniques.
  • Partner with engineering teams to implement evaluation methods in production systems.
  • Contribute to standards that improve agent observability and execution explainability.

Benefits

  • Comprehensive health and wellness programs.
  • Generous paid time off policy and sick leave.
  • Opportunities for professional development and continuous learning.
  • Enthusiastic workplace culture that values diversity and inclusion.
Full Job Description
Overview

You will be a technical contributor driving the applied science foundation for observability in AI agents and multi-agent systems running at scale. This role focuses on understanding how intelligent agents behave in production-their quality, safety, reliability, cost, and evolution over time. You will develop and apply scientific methods, evaluation frameworks, and measurement systems that help teams understand, benchmark, diagnose, and safely improve agent-based systems with confidence.

AI agents introduce fundamentally new observability challenges: non-deterministic execution, tool- and model-driven decision paths, emergent multi-agent behaviors, and quality signals that go far beyond traditional uptime metrics. In this role, you will operate at the intersection of agent architecture, telemetry, evaluation science, and responsible AI, shaping how Microsoft measures and improves observable AI systems.

Responsibilities

What You'll Do

  • Develop evaluation and measurement frameworks for single-agent and multi-agent systems, spanning quality, safety, reliability, cost, and behavioral consistency.


  • Design methodologies that connect offline evals, online signals, and production telemetry to explain how prompt, tool, model, or orchestration changes affect real-world agent performance.


  • Define scientifically grounded quality signals and benchmarks for agent systems, including task success, tool-use effectiveness, plan quality, failure modes, coordination quality, and user-perceived outcomes.


  • Build models and analysis techniques that help detect regressions, identify root causes, and characterize agent behavior across diverse workflows and environments.


  • Advance observability for AI systems through new approaches to trace analysis, agent health modeling, behavioral clustering, anomaly detection, and multi-agent coordination analysis.


  • Partner with engineering teams to operationalize evaluation and observability methods in production systems, enabling safe iteration through staged rollouts, experimentation, A/B testing, and automated regression detection.


  • Contribute to instrumentation and semantic standards for agent observability, helping make agent execution more explainable, diagnosable, and comparable across systems.


  • Collaborate deeply with product and platform teams across Foundry, Azure Monitor, and agent runtimes to shape end-to-end experiences for evaluation, benchmarking, monitoring, and investigation.


  • Act as a technical leader by setting scientific direction, driving research-informed product decisions, mentoring others, and raising the technical bar across the organization.


Technical Focus Areas

  • Evaluation science for agent and multi-agent systems: offline, online, and continuous evals; benchmark design; synthetic data; task success measurement


  • Agent and multi-agent architectures: planners, tool use, memory, orchestration, and coordination patterns


  • Applied machine learning and statistical methods for behavioral analysis, anomaly detection, experimentation, and regression detection


  • Observability data for AI systems: traces, logs, metrics, evaluations, and cost/performance signals


  • Safety and responsible AI signals: policy compliance, risk detection, auditability, and safe logging


  • Benchmarking and experimentation for agent systems, including A/B tests, canaries, and staged rollouts


  • Explainability and diagnosis for complex agent workflows and model-driven decision paths


Qualifications

Required Qualifications:
  • Bachelor's Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python
    • OR equivalent experience.


Other Requirements:

Ability to meet Microsoft, customer and/or government security screening requirements are required for this role. These requirements include, but are not limited to the following specialized security screenings:
  • Microsoft Cloud Background Check: This position will be required to pass the Microsoft Cloud background check upon hire/transfer and every two years thereafter.


Preferred Qualifications:

  • 6+ years of experience in applied science, machine learning, evaluation systems, or related technical fields


  • Strong experience designing evaluation methodologies, experiments, or measurement systems for complex intelligent or distributed systems


  • Experience analyzing large-scale production or experimental data to derive actionable insights and drive product or system improvements


  • Strong coding and prototyping skills in Python or similar languages, with the ability to work closely with engineering teams on production-facing systems


  • Demonstrated ability to lead cross-team technical direction through scientific depth, influence, and strong problem framing


  • Advanced degree in Computer Science, Machine Learning, Statistics, Applied Mathematics, or related field


  • Experience building or evaluating LLM- or agent-based systems in production


  • Familiarity with agent frameworks such as LangChain, LangGraph, OpenAI SDK, or equivalent orchestration frameworks


  • Experience with evaluation frameworks for AI systems, including benchmarking, regression analysis, and human-in-the-loop assessment


  • Experience with observability systems, telemetry analysis, or distributed tracing data in large-scale environments


  • Background in AI safety, guardrails, and responsible AI measurement


  • Experience with experimentation platforms, causal inference, or statistical methods for product and model evaluation


  • Experience working with cloud-scale monitoring platforms such as Azure Monitor / Application Insights or equivalent


Applied Sciences IC6 - The typical base pay range for this role across the U.S. is USD $165,600 - $296,400 per year. There is a different range applicable to specific work locations, within the San Francisco Bay area and New York City metropolitan area, and the base pay range for this role in those locations is USD $220,800 - $331,200 per year.

Certain roles may be eligible for benefits and other compensation. Find additional benefits and pay information here:
https://careers.microsoft.com/us/en/us-corporate-pay

This position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled.

About Microsoft

Microsoft is an American multinational corporation that develops, manufactures, licenses, supports, and sells a range of software products and services. Microsoft’s devices and consumer (D&C) licensing segment licenses the Windows operating system and related software, Microsoft Office for consumers, and the Windows Phone operating system. The company’s computing and gaming hardware segment provides Xbox gaming and entertainment consoles and accessories, second-party and third-party video games, and Xbox Live subscriptions; surface devices and accessories; and Microsoft PC accessories. Its phone hardware segment offers Lumia smartphones and other non-Lumia phones. Its D&C segment provides Windows Store, Xbox Live transactions, and Windows phone store; search advertising; display advertising; Office 365 Home and Office 365 Personal; first-party video games; and other consumer products and services as well as operating retail stores. Microsoft’s commercial licensing segments license server products, including Windows Server, Microsoft SQL Server, Visual Studio, System Center, and related Client Access Licenses (CALs); Windows Embedded; Windows operating system; Microsoft Office for business, including Office, Exchange, SharePoint, Lync, and related CALs; Microsoft Dynamics business solutions; and Skype. Its commercial segment offers enterprise services, including premier support services and Microsoft consulting services; commercial cloud comprising Office 365 Commercial, other Microsoft Office online offerings, Dynamics CRM Online, and Microsoft Azure; and other commercial products and online services. The company markets and distributes its products through original equipment manufacturers, distributors, and resellers, as well as online.

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Size
181,000 employees
Market Cap
$1,762.4 billion
Industry
Net Income
$51.3 billion
Founded
1975
5 Year Trend
+15.5%
Revenue
$153.2 billion
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