AI Engineer, Search & Knowledge Systems

July 9, 2026

Other Jobs To Apply

AI Engineer, Search & Knowledge SystemsAbout Pi Pi is building an agentic product security platform for teams that need to secure software at the speed they build it. Modern development is accelerating, but security knowledge is still scattered across code, tickets, documents, incidents, reviews, and the people who remember why decisions were made. Pi turns that context into institutional security memory, helping teams triage faster, remediate in context, prevent repeat vulnerability classes, and embed security guardrails where engineering work already happens. We are building for a future where security is not a blocker at the end of the development process. It is part of how software gets designed, reviewed, shipped, and improved. Read about Pi Security on Forbes! About The Role We are looking for an AI Engineer specializing in search, retrieval, knowledge systems, and relationship discovery. You will design and build the systems that help Pi understand and connect security-relevant context across code, pull requests, tickets, documents, incidents, findings, cloud resources, and customer environments. Your work will power the retrieval, grounding, provenance, and relationship modeling behind Pi’s agentic security workflows. This role is ideal for someone who combines strong software engineering with deep interest in information retrieval, applied AI, knowledge representation, ranking, evaluation, and production systems. What You’ll Do <ul><li>Build AI-powered search and discovery systems across structured and unstructured security and engineering data. </li><li>Develop retrieval-augmented generation pipelines using embeddings, hybrid search, reranking, chunking, metadata filtering, grounding, and citation-aware generation. </li><li>Build knowledge systems that represent entities, relationships, events, decisions, vulnerabilities, controls, code ownership, services, and provenance. </li><li>Improve relevance, recall, precision, ranking quality, and answer accuracy across search, investigation, and agentic workflows. </li><li>Design systems for entity extraction, entity resolution, ontology design, relationship inference, and semantic enrichment. </li><li>Evaluate and combine lexical search, semantic search, hybrid search, graph-based retrieval, and agentic retrieval patterns. </li><li>Build evaluation frameworks for retrieval quality, hallucination reduction, grounding, freshness, citation accuracy, and user satisfaction. </li><li>Build ingestion and indexing pipelines that normalize, enrich, connect, and refresh data from multiple customer and product sources. </li><li>Monitor production AI systems, debug retrieval failures, improve latency, and optimize cost/performance tradeoffs. </li><li>Partner with product, backend, frontend, platform, and security teams to turn ambiguous customer needs into reliable knowledge systems. </li><li>Help create the foundation that lets Pi preserve institutional security memory and prevent recurring vulnerability classes. </li></ul>What We’re Looking For <ul><li>Strong software engineering experience in Python, TypeScript, or similar languages. </li><li>Experience building production search, recommendation, knowledge management, or AI retrieval systems. </li><li>Hands-on experience with RAG architectures, embedding models, vector search, rerankers, and LLM-backed workflows. </li><li>Strong understanding of information retrieval concepts such as indexing, ranking, query expansion, relevance scoring, recall/precision, BM25, dense retrieval, and hybrid search. </li><li>Experience working with structured and unstructured data, including code, documents, tickets, logs, metadata, databases, APIs, and event streams. </li><li>Experience designing evaluation methods for search relevance, retrieval quality, and AI-generated answers. </li><li>Ability to build reliable, observable, production-grade systems. </li><li>Strong product judgment: you can translate ambiguous user needs into practical search, knowledge, and retrieval systems. </li><li>Strong security instincts around authorization, tenant isolation, data exposure, provenance, and safe handling of customer context. </li><li>Ability to work in a fast-moving startup environment with ownership, autonomy, and good judgment. </li></ul>Technologies We Use <ul><li>Python</li><li>TypeScript</li><li>Embedding models</li><li>Rerankers</li><li>Lexical, semantic, and hybrid search</li><li>Vector search</li><li>PostgreSQL</li><li>Graph-based data modeling</li><li>Workflow orchestration systems</li><li>Data ingestion and indexing pipelines</li><li>Evaluation and observability tooling</li><li>Docker </li></ul>Nice To Have <ul><li>Experience with knowledge graphs, graph databases, graph embeddings, ontology design, or taxonomy management. </li><li>Experience with entity linking, entity resolution, relationship extraction, or semantic enrichment. </li><li>Experience with LLM orchestration, agentic search, tool use, or multi-step reasoning systems. </li><li>Experience with NLP techniques such as named entity recognition, classification, summarization, clustering, topic modeling, or semantic similarity. </li><li>Experience with data pipelines for ingesting, transforming, indexing, and refreshing large datasets. </li><li>Experience with cloud platforms and production AI infrastructure. </li><li>Experience with security products, developer tools, code analysis, cloud security, enterprise search, legal tech, finance, healthcare, or research platforms. </li></ul>Example Projects <ul><li>Build a hybrid search system that combines keyword search, semantic search, metadata filters, and graph traversal. </li><li>Design a knowledge system that connects repositories, services, pull requests, tickets, findings, vulnerabilities, cloud resources, owners, and decisions. </li><li>Build a RAG system that produces grounded answers with citations, confidence signals, and traceable source context. </li><li>Create pipelines for extracting entities and relationships from code, tickets, documents, security findings, logs, and cloud metadata. </li><li>Develop relevance evaluation datasets and automated tests for retrieval quality, grounding, and answer accuracy. </li><li>Improve agentic workflows by giving AI systems better context, better retrieval, and better understanding of customer-specific security history. </li></ul>Success In This Role Looks Like <ul><li>Users can find the right security and engineering context faster and with higher confidence. </li><li>AI-generated answers are grounded, cited, and reliable. </li><li>Relationships that were previously hidden across code, tickets, documents, findings, and infrastructure become discoverable and useful. </li><li>Search relevance, retrieval accuracy, grounding quality, and system latency measurably improve over time. </li><li>Knowledge systems are maintainable, observable, and extensible as new data sources are added. </li><li>The product helps customers understand risk, act faster, and prevent the same security issues from recurring.</li></ul>

Back to blog

Common Interview Questions And Answers

1. HOW DO YOU PLAN YOUR DAY?

This is what this question poses: When do you focus and start working seriously? What are the hours you work optimally? Are you a night owl? A morning bird? Remote teams can be made up of people working on different shifts and around the world, so you won't necessarily be stuck in the 9-5 schedule if it's not for you...

2. HOW DO YOU USE THE DIFFERENT COMMUNICATION TOOLS IN DIFFERENT SITUATIONS?

When you're working on a remote team, there's no way to chat in the hallway between meetings or catch up on the latest project during an office carpool. Therefore, virtual communication will be absolutely essential to get your work done...

3. WHAT IS "WORKING REMOTE" REALLY FOR YOU?

Many people want to work remotely because of the flexibility it allows. You can work anywhere and at any time of the day...

4. WHAT DO YOU NEED IN YOUR PHYSICAL WORKSPACE TO SUCCEED IN YOUR WORK?

With this question, companies are looking to see what equipment they may need to provide you with and to verify how aware you are of what remote working could mean for you physically and logistically...

5. HOW DO YOU PROCESS INFORMATION?

Several years ago, I was working in a team to plan a big event. My supervisor made us all work as a team before the big day. One of our activities has been to find out how each of us processes information...

6. HOW DO YOU MANAGE THE CALENDAR AND THE PROGRAM? WHICH APPLICATIONS / SYSTEM DO YOU USE?

Or you may receive even more specific questions, such as: What's on your calendar? Do you plan blocks of time to do certain types of work? Do you have an open calendar that everyone can see?...

7. HOW DO YOU ORGANIZE FILES, LINKS, AND TABS ON YOUR COMPUTER?

Just like your schedule, how you track files and other information is very important. After all, everything is digital!...

8. HOW TO PRIORITIZE WORK?

The day I watched Marie Forleo's film separating the important from the urgent, my life changed. Not all remote jobs start fast, but most of them are...

9. HOW DO YOU PREPARE FOR A MEETING AND PREPARE A MEETING? WHAT DO YOU SEE HAPPENING DURING THE MEETING?

Just as communication is essential when working remotely, so is organization. Because you won't have those opportunities in the elevator or a casual conversation in the lunchroom, you should take advantage of the little time you have in a video or phone conference...

10. HOW DO YOU USE TECHNOLOGY ON A DAILY BASIS, IN YOUR WORK AND FOR YOUR PLEASURE?

This is a great question because it shows your comfort level with technology, which is very important for a remote worker because you will be working with technology over time...

DISCLAIMER