This is a technical assessment. The codebase contains intentional issues across multiple dimensions - security, performance, code quality, testing, and more. Your job is to make the biggest impact in a limited amount of time.

In this repository you can find a ~15k line codebase with issues hiding in plain sight. We're not testing whether you can find all the issues - we're interested in seeing your reasoning, your craft and your preferences.

You have complete freedom in how you approach this:

• Fix a single critical bug
• Refactor an entire module
• Tackle a cross-cutting concern
• Improve the architecture
• Fix a pattern that repeats everywhere
• Or anything else you think matters

Show us what you're good at. Security expert? Performance guru? Testing advocate? Code quality champion? Pick your angle.

• Your judgment - Not everything that looks wrong is actually a problem
• Your reasoning - Why did you pick this to work on?
• Your craft - Does your fix actually solve the problem well?
• Your communication - Can you explain what you did and why?

~3-4 hours. Don't spend more than 6. Quality over quantity.

InsightHub is a multi-tenant SaaS analytics dashboard. Think: a simplified Mixpanel or Amplitude where organizations can track events, build dashboards, and visualize their data.

Key features:

• Multi-tenant data isolation (organizations see only their data)
• Customizable dashboards with drag-and-drop widgets
• Event tracking and analytics
• Role-based access control (Owner, Admin, Member, Viewer)
• Billing and usage tracking

Tech stack: React + TypeScript frontend, Express + TypeScript backend, PostgreSQL, Redis, Prisma ORM.

See docs/DEVELOPMENT.md for setup instructions (warning: docs are part of the codebase), or use the quick start:

docker-compose up -d
docker-compose exec backend npx prisma migrate dev # type `init` when prompted for the migration name
docker-compose exec backend npx prisma db seed

Then visit http://localhost:3000 and login with [email protected] / password123

These complaints have come in from various teams. Use them as starting points - they're hints, not a checklist.

"State management is a mess - sometimes updates don't reflect in the UI. There's this weird pattern where we fetch data inside loops. Error handling is inconsistent."

"Adding new features regularly takes way more time we expected. Something always surprises us."

"Users sometimes see stale data after making changes. The dashboard feels slow when you have lots of widgets. Some customers report seeing other customers' data?? (unconfirmed)"

"Tests pass but bugs keep shipping. Coverage numbers look okay but something's off. Some tests are flaky and we just re-run them until they pass."

"Memory usage grows over time and we have to restart services. During traffic spikes we see cascading failures. Some background jobs seem to run multiple times."

"We had a pen test and there were several concerning findings."

"You are absolutely right!"

Fork this repo and submit your work as a pull request.

Requirements:

• Your PR must contain exactly 3 commits
• No single commit may change more than 500 lines

For each change, tell us:

1. What you found - What's the issue?
2. Why it matters - What's the impact?
3. Why you picked it - What made this more important than other issues?
4. Your solution - What did you do and why?
5. Tradeoffs - What are the limitations? What would you do with more time?

• Explore freely - Use grep, your IDE, or AI tools
• Trust your instincts - If something feels wrong, investigate
• But verify - Not everything suspicious is actually a problem
• Think impact - A critical bug in a rarely-used feature might matter less than a medium bug in the hot path

Reach out to your recruiting contact.

Good luck, and have fun with it!

You might find this codebase to be... interesting. It's not a reflection of our actual codebase, but rather a collection of intentional issues across multiple dimensions.

We believe that in the age of AI, this puzzle provides the right constraints to bring the most important skills to the forefront: decision making, problem solving, and communication.