Principal AI Engineer, Search AI

Location:

At LinkedIn, our approach to flexible work is centered on trust and optimized for culture, connection, clarity, and the evolving needs of our business. The work location of this role is hybrid, meaning it will be performed both from home and from a LinkedIn office on select days, as determined by the business needs of the team.

This role will be based in Sunnyvale California, Bellevue Washington, or New York City.

Team Mission:

As we enter the biggest transformation of work in our lifetime, the majority of jobs on this planet will change over the next few years. Figuring out how humans find their path and earn a living is the most important problem in the world right now—and that’s what we’re solving on LinkedIn Search. Our mission is to connect every professional to the right people, knowledge, and opportunities.

What This Role Is:

As a Principal AI Engineer on LinkedIn Search, you will serve as the technical architect behind our shift from semantic search to Agentic Search. You will lead the technical vision and execution for multi-step reasoning, autonomous execution, tool/API orchestration, and conversational search workflows that understand complex intent, synthesize insights, and proactively take action on behalf of members.

Working across ranking, infrastructure, and multiple partner teams, you will architect the AI systems that turn static search results into an adaptive and agent-driven intelligence engine for 1B+ members.

What You’ll Do:

• Design Agentic Systems: Design and scale multi-agent reasoning frameworks, tool-use protocols, and memory systems, optimized for real-time search workflows.

• Drive Evals & Safety: Build rigorous evaluation harnesses and guardrails for non-deterministic agent workflows, ensuring enterprise-grade trust, attribution, and safety at global scale.

• Rapid AI Prototyping: Build runnable, state-of-the-art agentic POCs to prove out new paradigms (multimodal search, proactive task execution, autonomous candidate/job matching) and push them directly to production.

• Mentor & Elevate: Set technical standards, engineering best practices, and architectural principles for AI/LLM deployment across the broader search organization.

Why We Are Here:

Behind every search executed by our AI agents, there’s a human getting one step closer to paying their mortgage, funding a small business, or finding their dream career. Your responsibility is to build the underlying intelligence that turns those searches into real-world outcomes.

Core Responsibilities:

As a Principal AI Engineer and senior-level member of technical staff, you will deliver a combination of strategic thought leadership, innovation, and execution. 

• Provide expert hands-on contribution

• Design multi-step reasoning frameworks, task planning systems, and tool-calling agents that solve complex operational or data challenges

• Define systems and standards for model evaluation, agent orchestration, and memory/context management 

• Implement rigorous safety guardrails, error handling, logging, evaluation mechanisms, and fallback strategies for production LLMs. 

• Serve as a Technical Leader, mentoring engineers and guiding complex technical decisions