Member of Technical Staff, Principal Full Stack Engineer - Copilot Applications

Microsoft Microsoft · Big Tech · Mountain View, CA +1 · Software Engineering

This role focuses on building cross-cutting capabilities for AI companions like Copilot, spanning multiple modalities (text, voice, vision, action). The engineer will own features end-to-end, collaborate with AI researchers, and ship experiments rapidly to create user experiences that redefine AI companionship. The role requires strong full-stack fundamentals and comfort with ambiguity in a fast-paced environment.

What you'd actually do

  1. Create breakthrough experiences that redefine what an AI companion can do
  2. Build across modalities—voice, vision, text, and action—to make Copilot feel seamless and alive
  3. Own features end-to-end, from concept through production, at scale
  4. Collaborate with applied AI researchers to bring cutting-edge model capabilities to users
  5. Ship experiments rapidly, learn from usage, and iterate toward experiences that feel like magic

Skills

Required

  • 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

Nice to have

  • Master'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 Bachelor's Degree in Computer Science or related technical field AND 12+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience
  • Strong full-stack fundamentals across frontend (React, TypeScript) and backend systems
  • Proficiency in Python or similar languages for backend development
  • Experience building scalable web APIs and services
  • Comfort with ambiguity and the ability to move fast in loosely-defined problem spaces
  • Taste for great product experiences and a drive to ship work that matters

What the JD emphasized

  • build systems that have true artificial intelligence
  • make Copilot the essential AI companion
  • build revolutionary experiences at the intersection of modality and intelligence
  • ship things that millions of people use
  • work on well-scoped problems with clear answers, this isn't the team
  • define the future of how humans and AI live and work together

Other signals

  • building systems with true artificial intelligence
  • building for a future where AI doesn't just respond—it acts, creates, and orchestrates
  • build revolutionary experiences at the intersection of modality and intelligence
  • ship things that millions of people use