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Production-grade scenarios with real issues baked in. No artificial sandboxes, no fake code editors.
Finish a customer's half-built AI support-ticket triage tool from a messy brief and dirty data.
A production webhook handler is causing duplicate task creation under load. Candidates must trace a causal chain of failures across async processing, idempotency, and data access patterns.
Backend API for QuickBite, a food delivery platform.
Backend microservice debugging: Spring Boot 3 + Kafka order processing pipeline with planted bugs.
Payments API red team: find and exploit planted vulnerabilities in a settlement & reconciliation API.
Invoices dashboard: fix UI bugs in filtering, search, and totals, then build a small feature.
Real-time order dashboard with a live SSE feed and an analytics chart.
Full-stack order-tracking dashboard for a food-delivery kitchen (Angular + Spring Boot).
Real-estate crowdfunding investment platform built with Rails and Hotwire.
Backend QA challenge: write pytest tests that catch planted bugs in a FastAPI service over Memgraph.
Data pipeline debugging: Python ETL + dbt models (raw → staging → marts) over DuckDB.
More challenges coming soon
New specialties and seniority levels are on the way.