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# Principal Software Engineer - Growth (CoreAI)

- **Company:** Microsoft
- **Location:** Boston, MA, United States
- **Experience:** Expert
- **Salary:** $165,600 - $296,400
- **Contract:** Permanent contract
- **Skills:** C (Programming Language), Java (Programming Language), JavaScript (Programming Language), Artificial Intelligence, Microsoft Online Services, C Sharp (Programming Language), C++ (Programming Language), Software Debugging, Distributed Systems, Failover, Python (Programming Language), Microsoft Visual Studio, Microsoft Copilot, Information Technology, Production Code
- **Published:** November 6, 2026
- **Apply:** https://jobs.localjobnetwork.com/apply/add/86299895/1

## About the Role

* Proven ability to design and shipsystemic solutions(platforms, frameworks, primitives) that enable multiple teams to move faster - whileremainingdeeply handson and detailoriented

 * Software engineering fundamentals with experience building, shipping, and operatingproduction services or client applicationsat scale

 * Demonstrated technical leadership acrossarchitecture, service fundamentals, and quality(reliability, performance, operability, security, and maintainability)

 * Track recordof translating ambiguous product/business problems intomeasurable engineering outcomes, with clear hypotheses, instrumentation, and decision criteria

 * High data aptitude: comfortable with metrics, telemetry, and experimental analysis - and able to raise the bar on experimentation rigor and interpretation, * Bachelor's Degree in Computer Science or related technical field AND 8+ 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

 * 8+ yearsbuilding and shippinghighavailability featuresformultiregion, globally distributed systems(resiliency, failover, capacity planning)

 * 4+ years of experience in experimentation with emphasis on quality: guardrails, bias detection, metric integrity, rollout risk management, and enterprise grade experimentation

 * Demonstrated experience buildingexperimentation/measurement platforms(feature flags/flighting, assignment, metrics pipelines, analysis tooling) used by multiple teams

 * Demonstrated experienceleaning heavily on AI to accelerate engineering velocity, including using AI tools to prototype, implement, debug, and iterate on production systems

 * Crossteam influence: you create clarity, align stakeholders, and drive execution across organizational boundaries - without becoming a "piecemover"

## Description

* We'rebuildingAIfirst growth and experimentation systemsthat scale across Microsoft. This role is about designing foundational engineeringsystems (instrumentation, experimentation, rollout, and decisioning) that let teams ship, measure, learn fasterwith higher confidence.

 * As aPrincipal Growth Engineer inCoreAI,you'lldrive the technical strategy for how wemeasure, experiment, and scaleAI experiences across worldclass products - whileremainingdeep in the details and landing meaningful changes daily.

 * At this level, impact comes from buildingrepeatable systemsand raising the engineering bar: better experiment quality, better telemetry, safer rollouts, and clearer business outcomes - delivered through pragmatic execution and deep technical judgment.

AboutCoreAI

 * CoreAI- Platform and ToolsisMicrosoft's AIfirst engineering organization, created to build theendtoend Copilot & AI stackpowering products likeGitHub Copilot and Visual Studio Code.

 * Our mission is toempower every developer to shape the future with AI, accelerating how AI applications are built, deployed, and improved atglobalscale.

Responsibilities

WhatYou'llDo

 * Own growth through engineering excellence and experimentation - at a systems level

 * Architect and buildpaved pathsfor online experimentation: standardized metrics, guardrails, analysis workflows, and rollout automation that improve reliability and decision quality across teams

 * Lead multiworkstream initiatives that span teams/products (e.g., unified growth measurement, crosssurface funnels, experimentation quality improvements)

 * Build and evolve core capabilities:telemetry foundations, experiment assignment/targeting, feature flighting, and risk controls (killswitches, guardrails, progressive delivery)

 * Partner with Product, Data Science, Design, and Research to turn ambiguous goals intoshippable, measurable systems

 * Stay close to the work: write production code, review designs/PRs, and coach others through architecture and implementation tradeoffs