Principal Backend Engineer (AI)

TL;DR

Principal Backend Engineer (AI): Building and optimizing foundations for Copilot memory and personalization, designing systems to reliably capture, refine, and serve user signals across interactions. Focus on evolving large-scale data architectures, operating high-quality personalization and memory data pipelines, and exposing well-designed APIs for product and ML consumers.

Location: This is a hybrid role based in Mountain View, United States. Employees within 50 miles (U.S.) of a Microsoft office are expected to work from the office at least four days a week.

Salary: USD $220,800 – $331,200 per year (for IC6 level in San Francisco Bay Area or New York City metropolitan area).

Company

hirify.global is building systems with true artificial intelligence across agents, applications, services, and infrastructure, aiming to make AI accessible to all.

What you will do

• Design and evolve large-scale data architectures that support Copilot memory and personalization.
• Build and operate high-quality personalization and memory data pipelines, including signal ingestion and lifecycle management.
• Enable memory and personalization features by exposing well-designed datasets, APIs, and feature interfaces.
• Work closely with PMs, applied ML, and product engineering to translate product intent into robust data systems.
• Act as a technical leader for memory and personalization data systems, influencing architecture and standards.
• Lead design reviews, unblock complex technical problems, and make principled trade-offs in ambiguous spaces.

Requirements

• Bachelor’s Degree in Computer Science or related technical field.
• 6+ years of technical engineering experience with coding in languages including C, C++, C#, Java, JavaScript, or Python.
• Experience building and deploying machine learning or large language model (LLM) applications at scale (preferred but critical).
• Experience designing and implementing large-scale embedding, retrieval, and ranking systems (preferred but critical).
• Work authorization for the United States is required.

Culture & Benefits

• Work in a highly collaborative, fast-paced environment.
• Opportunity to work on interesting and challenging AI questions.
• Company values of respect, integrity, and accountability to foster an inclusive culture.
• Access to Microsoft’s comprehensive benefits and compensation package.
• Microsoft is an equal opportunity employer committed to diversity.