Practice
Workplace simulations and interview practice. Optional beyond the weekday lessons; studios embed selected scenarios. Everything simulated is labelled.
- 100scenarios
- 25capabilities covered
- 62 hof simulated work
- 150interview questions
Scenarios by capability100
Production incident
Senior code review
Stakeholder simulation
Messy real-world data
ADR centre
Live coding and SQL
- SQL gym: rolling and same-weekday features with window functions30 min
- Python gym: entity-safe lag and rolling features in pandas30 min
- SQL gym: consecutive nearly-full streaks and why the first query lies35 min
- Python gym: turning cumulative booking curves into pickup in pandas35 min
- SQL gym: booking pace against the same weekday last year40 min
ML system design
Ambiguous business case
Verbal defense
Statistical traps
Ablations
Decision theory and value
Robustness and stress tests
Paper reproduction
RAG evaluation workbench
LLM failure lab
- Unsupported citations and broken JSON in a claims assistant35 min
- Injected instructions and a looping helpdesk agent40 min
- A claims summariser that never saw its last document35 min
- A refund assistant that paid twice, in the wrong unit35 min
- An oversized voucher late in a long baggage-claim conversation40 min
Multi-agent company
End-to-end lifecycle
Golden test set and regression
Hiring committee
AI cost–quality
Agents vs workflows
Teach-back and Socratic interviewer
Executive presentation
Research reading protocol
- Read a churn paper before believing its abstract35 min
- Read an agent benchmark paper before adopting its framework35 min
- Does long context make retrieval obsolete? Read the claim40 min
- A language-model judge that agrees with humans 85% of the time35 min
- LoRA matches full fine-tuning: how much can 400 invoices show?35 min
Interview gym159
- Before anyone builds it, the head of marketing asks you: "Is a churn model worth it for us?" The company has 1 million subscribers and about 2% monthly churn.senior15 min
- The chief commercial officer asks: "Should we launch a cheaper basic fare without a checked bag on our domestic routes?" You have 20 minutes. How do you structure your answer?senior20 min
- A marketing email campaign cost 81,000 and was sent to 450,000 customers, with 50,000 comparable customers held out at random (hypothetical figures).senior15 min
- Leadership sets the goal "reduce route-level forecast MAPE by 20% this year" and ties bonuses to it. After six months the average MAPE across 200 routes (unweighted) dropped from 21.3% to 16.6%.senior15 min
- A four-week pilot of a pricing-recommendation model on 20% of routes shows revenue +1.1% against control, with a 95% interval of -0.3% to +2.5%.senior15 min
- A retention programme calls customers ranked by an uplift model. A holdout experiment on 10,000 customers (hypothetical, 1,000 per decile of predicted uplift) shows the incremental number of…senior15 min