The IFS guide

This guide prepares you for your first weeks as Principal Product Manager, IDP & Agentic AI at IFS [posting: pm]. Each topic explains its subject from the ground up. A few ranked materials follow, for when you want to go deeper.

What this guide is, and what it isn't

• It explains. You can follow every topic without opening a material. An earlier study plan listed 201 sources, and you read 2, so the text here does the work.
• It's a snapshot from before your first day. It holds public knowledge and what the hiring process revealed. Nothing you learn inside IFS after you start comes back into it.
• It isn't IFS documentation. Where nobody outside IFS knows the answer, a topic says so and links an open question. The open questions page collects all of them for your first weeks.
• It isn't interview preparation. It scripts nothing for you to say.

Every fact about IFS carries a tag that says where it came from.

• [posting: pm] is a job posting, here your own.
• [public] is a public page, linked.
• [inference] is this guide's reasoning from facts the text names.
• [unverified] is a single weak source, never stated as fact.

How the ranks work

Every topic, section and material has one of four ranks. The rank says how much of your time it deserves.

No section ranks above its topic. Critical materials are few, and each one says what it gives that the text doesn't. High and medium materials differ by how much a skim pays, not by when you read them.

How to read it

This guide has three tiers. Each tier page quotes your own definition of it.

• Base is the platform you're optimising, and the company around it.
• Practical is the practice of fixing it: methods, research, frameworks and metrics.
• Modern is what today's tools change about the problem and about the solutions.

Each tier page opens with a map of its topics. Below this text, "Where to start" gives the reading order: the critical topics first, with the few high topics they build on. The other high topics follow, then the medium ones.

Every topic page runs in the same order: why it matters in the seat, a short version, the explanation, and what is known and unknown at IFS. Where practitioners disagree, it takes a position and gives the case against. The materials and what this guide couldn't verify close the page.

Private blocks

Some facts come from your hiring conversations and the material you received for them. People shared them with you as a candidate, so they're private. Each one sits in a private block that stays closed until you open it.

• A closed block shows only its label. The label names the subject, never the fact, so a page can be open where someone else sees the screen.
• "Open all private facts" opens every block on a page, and closes them again.
• Search doesn't look inside private blocks, and a closed block prints its label only.
• Every page still reads with its blocks closed.