They expect you to do a WEEK'S WORK for free, with no expectation of money or employment. Even worse, we're talking a week's work for a VERY EXPERIENCED software developer; someone who deserves at least $150K a year.
This project is worth AT LEAST $3K, but only if you're paying the guy year-round. If it were a one-off or contractor, you could expect to pay $10K or more for an app like this.

Actually "a week's work" might be too conservative. It's probably more like a 100-hour week's work. Someone totally engrossed and "focused" with literally nothing else going on in his life -- barely even sleep.

The slave labor output could be VERY valuable to the company; they could make real money off it, and every dollar of it would be pure profit! What a scam!
And it doesn't matter how long your resume is, how impressive your credentials/work history/portfolio/education, or how long you've worked in the industry -- you're always expected to start from zero and prove yourself -- prove you're not a complete scam.

Company name and details have been left in, to facilitate shaming!

EDIT: This is 100% a scam. Their website offers 12 existing AI products -- BUT NOT THE ONE DESCRIBED BELOW -- for money right now. How much you wanna bet they'll add a 13th, a "PDF analyzer" or whatever?
I feel sorry for whatever desperate and/or foreign developer falls for this.

Here is a real-life example:

StudyFetch Technical Assignment
Senior Fullstack Software Engineer

DO NOT TURN IN AN INCOMPLETE OR NOT FUNCTIONAL PROJECT. IT WILL BE IMMEDIATELY DISQUALIFIED.
Similar projects to this are done on the job on a weekly basis solo. If you are unable to complete this independently, you will not be able to perform on the job.
https://www.studyfetch.com/enterprise/mission

Project Overview
Create an AI tutor that helps students understand PDF docuмents through an interactive split-screen interface. Users should be able to chat with the AI (via text or voice) about the docuмent while the AI can highlight and annotate relevant parts of the PDF in real-time.

Technical Stack
Next.js 14+ (App Router)
Prisma with PostgreSQL or MongoDB
Choice of LLM provider (OpenAI, Google, etc.) ai-sdk from vercel is helpful
Choice of Speech-to-Text/Text-to-Speech API (or use the browsers)
Tailwind CSS for styling

Core Features
Authentication
Simple email/password signup and login
User session management
No complex permissions needed
PDF Viewer
Split-screen layout with PDF view and chat
PDF upload and storage
Basic PDF navigation (page turning)
Ability for the LLM to highlight and annotate the PDF as its chatting with the user.
AI Tutor Integration
Real-time chat interface
Voice input/output capability
Chat history persistence
AI can reference and control PDF viewing like changing the page or referencing a piece of text with a page number
AI can highlight/circle important content in the PDF
Context-aware responses based on PDF content
Database Integration
Store user data and chat history
Save PDF metadata and be able to relaunch the pdf
Track conversation context

Example User Experience:
User will create an account or login to the site with an email / password
Users can upload a PDF docuмent to begin the chat with the tutor.
The PDF will load in and be visible in a split screen with a chat and the pdf
The user can ask questions to the chat, e.g. for a biology presentation, “What is a virus”
The chat will be able to navigate to appropriate pages, source the page #, and draw things on the PDF to highlight the appropriate text or image for e.g. a navigate to the page which explains what a virus is, and draw a circle around appropriate virus text or an image of the virus.
Users can close the browser window and reopen to see their chat history with the LLM and the PDF still there.

Deliverables
GitHub repository with:
Complete source code
Setup instructions
.env.example file
Basic docuмentation
Deployed public demo on vercel to access remotely that works and hits all of the core features
Send completed deliverables to marelle@studyfetch.com
Helpful Resources
Prisma Docuмentation: https://www.prisma.io/docs/
Vercel AI SDK: https://sdk.vercel.ai/docs
Various LLM Provider Docs:
OpenAI: https://platform.openai.com/docs
Google AI: https://ai.google.dev/api/multimodal-live

Notes
The key challenge is implementing the AI's ability to highlight and annotate PDFs
Focus on making the voice interaction smooth and natural
Keep the UI clean and intuitive, make this a product you would ship as a developer at studyfetch.
Make it something you'd want to use yourself
We'll use this to evaluate your technical skills and problem-solving ability!

A little off topic...

As far as I know, it is relatively easy to get help from the community for software development projects, except from those who understand the need to protect their job security. Now I'm not talking about the scam above, but community help to accomplish and better anything sounds Catholic to me. I often think how it would be great if various electronics companies would try to get their new product out into the advanced hobbyist community to test it and make improvements instead of settling for however good their in house engineers design it, and however good the Chinese manufacturer makes it with inferior components. Hobbyists are happy to work for free doing stuff like this. How much else could get done without money changing a lot of hands, which we know is inefficient with all the taxes, fees, and interest losses involved? I'm curious how far it could go without putting anyone out of business or causing them hardship. Could a society work where everyone does what needs to be done or what could be done to benefit the community without seeking profit or compensation except for their necessities? What would such a society look like, one big Catholic business monopoly/co-op instead of many people leaving a business to start a competing one? I think in such a society some people would appear to get a lot for nothing, but 1) they have their place in society and 2) isn't that the way of true charity; freely giving an abundance out of love in imitation and continuation of God's love and goodness?