Principal Mobile Engineer (AI)

TL;DR

Principal Mobile Engineer (AI): Building and optimizing high-quality iOS or Android applications for Copilot, a personalized AI assistant, with an accent on technical craftsmanship and consumer-grade experiences. Focus on turning ambiguous ideas into polished user experiences and navigating roadblocks in a fast-paced, design-driven product development cycle.

Location: Hybrid in London, United Kingdom. Office attendance is expected at least four days per week if living within 25 miles of a Microsoft office, starting January 26, 2026.

Company

hirify.global is dedicated to advancing Copilot and other consumer AI products and research, shaping the future of personal computing.

What you will do

• Build and ship high-quality iOS or Android applications for Copilot.
• Write well-tested, secure, and maintainable code following strong engineering fundamentals.
• Partner closely with Designers, Product Managers, and AI Researchers.
• Turn ambiguous ideas into polished user experiences.
• Navigate ambiguity and roadblocks to deliver value quickly and iteratively.
• Thrive in a fast-paced, design-driven product development cycle.

Requirements

• Bachelor’s Degree in Computer Science or a related technical field, or similar experience building mobile applications.
• Strong coding experience in Swift/Objective-C for iOS, or Kotlin/Java for Android.
• Experience shipping production mobile apps used by customers.

Nice to have

• Advanced degree or equivalent senior-level industry experience.
• Experience building mobile applications from scratch.
• Strong understanding of mobile architecture, design patterns, and UI/UX principles.
• Contributions to open-source projects.
• Excellent written and verbal communication skills.
• Passion for learning and staying current with mobile development, AI, and emerging technologies.
• Demonstrated ability to contribute to a positive, inclusive engineering culture.

Culture & Benefits

• Operate with a growth mindset.
• Embody Microsoft’s Culture and Values: respect, integrity, accountability.
• Work in a culture of inclusion where everyone can thrive.
• Work in a fast-paced, design-driven product development cycle.