Senior/Principal Software Engineer - Growth (CoreAI)

Microsoft•Mountain View, CA

About The Position

We’re building AI‑first engineering systems that power growth at Microsoft — designing, shipping, and scaling code that directly shapes how millions of developers experience and adopt AI. As a Growth Engineer in CoreAI, you’ll sit at the intersection of product, engineering, and data, driving experimentation, learning velocity, and real business impact across world‑class developer and AI products. This role is about shipping fast, learning faster, and scaling what works — all while upholding Microsoft’s commitment to responsible, inclusive, and trustworthy AI. CoreAI – Platform and Tools is Microsoft’s AI‑first engineering organization, created to build the end‑to‑end Copilot & AI stack powering products like GitHub Copilot and Visual Studio Code. Our mission is to empower every developer to shape the future with AI, accelerating how AI applications are built, deployed, and improved at global scale. This is not growth at the edges — this is growth at the core. Build AI‑powered growth loops on world‑class products like VS Code and GitHub. Operate inside a high‑velocity, AI‑first engineering organization where learning speed matters. Influence how hundreds of millions of users discover, adopt, and succeed with AI. Drive real business impact — measured, shipped, and scaled. Help define what responsible growth looks like in the AI organisation.

Requirements

Software engineering fundamentals with experience building, shipping, and operating production services or client applications
Proficiency in designing scalable, reliable systems that support rapid iteration and experimentation
Experience writing high‑quality, maintainable code and owning services end‑to‑end in a live environment
Ability to reason about performance, reliability, and correctness in high‑traffic systems
Experience supporting or driving experimentation (A/B testing) in production environments
Understanding of experimentation quality, including guardrails, metrics selection, and rollout strategies
Engineering mindset grounded in hypothesis‑driven development and learning through iteration
Bachelor's Degree in Computer Science or related technical field AND 4+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience.
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.

Nice To Haves

2+ years shipping A/B tests end‑to‑end in production (design → instrumentation → analysis → rollout), including improving experiment quality and guardrails
4+ years building and shipping high‑availability features for multi‑region, globally distributed systems (resiliency, failover, capacity planning)
Demonstrated experience leaning heavily on AI to accelerate engineering velocity, including using AI tools to prototype, implement, debug, and iterate on production features

Responsibilities

Own growth through engineering excellence and experimentation
Design, ship, and iterate on growth experiments across acquisition, activation, engagement, and retention
Build and evolve A/B testing frameworks, metrics, and tooling that raise experimentation quality and confidence
Partner closely with Product, Data Science, Design, and Research to turn hypotheses into shipped learnings
Use data and telemetry to guide decisions — from experiment design to rollout strategy
Scale successful growth patterns across high‑traffic, global AI products
Balance speed and rigor in a fast‑paced, AI‑first engineering environment