Principal Software Engineer (CoreAI)

Microsoft•Redmond, WA

2d•$142,800 - $331,200

About The Position

Join the team building the future of AI at Microsoft. The Microsoft Foundry team within Microsoft CoreAI is on a mission to empower developers and enterprises to design, deploy, and scale cutting-edge Generative AI systems and intelligent agents. We're looking for a Principal Full Stack Software Engineer to join our Microsoft Foundry Agents Platform team, where we’re creating intuitive and powerful agent-building experiences for developers and enterprises. You'll have the opportunity to work on high-impact, large-scale AI products alongside world-class talent. Help define how the world interacts with agents and intelligent systems. Microsoft’s mission is to empower every person and every organization on the planet to achieve more, and we’re dedicated to this mission across every aspect of our company. Our culture is centered on embracing a growth mindset and encouraging teams and leaders to bring their best each day. Join us and help shape the future of the world.

Requirements

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.
Ability to meet Microsoft, customer and/or government security screening requirements are required for this role.
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

6+ years of technical engineering experience with coding in languages including, but not limited to TypeScript, JavaScript, React, Python, C#, Node.js, OR equivalent experience
6+ years of experience in platform or front-end development using multiple languages and frameworks including JavaScript, TypeScript, and React
4+ years of experience in backend service development (APIs, microservices, or distributed systems) OR 4+ years of experience in creating developer platforms (APIs, SDKs, CLIs, etc.)
Demonstrated proficiency with AI-assisted software development tools and workflows (e.g., AI coding agents, LLM-powered development environments)
Expertise in LLM and GenAI Application development.
Deep understanding of modern front-end technologies such as NextJS / Remix , SSR , Web Components, and performance optimization techniques
Experience with distributed systems design and implementation
Experience designing and building RESTful APIs or GraphQL services
Track record of high development velocity through effective use of AI coding assistants and automation
Experience orchestrating complex development workflows across multiple concurrent workstreams
Familiarity with backend technologies such as Node.js, Python, or C# for service development
Knowledge of industry APIs and developer platforms for LLM-driven agentic systems
Experience with database technologies (SQL, NoSQL, or vector databases)
Passion for machine learning, artificial intelligence, and data science.
Experience working on large-scale Ui-intensive product development

Responsibilities

Leverage modern, AI-assisted development practices and tooling to accelerate delivery while maintaining high code quality
Architect full stack solutions that span from user experience and code-first platforms to backend data and service layers
Develop software using languages such as TypeScript, JavaScript, React, Python, and others
Design, develop, and maintain backend services and APIs that support agentic workflows and platform capabilities
Collaborate with partner teams to comprehend, define, enhance, and develop AzureML capabilities
Respond, resolve, and integrate customer feedback with agility and dedication
Lead by example, adhering to best engineering practices, raising the quality bar, and improving the team's response to customer incidents