FinTech Case Study Library

Simulate how compounding shapes long-horizon wealth, with deposits and frequency.

Visualize PV, FV and NPV — why a dollar today beats a dollar tomorrow.

Modern Portfolio Theory — plot the efficient frontier and pick optimal weights.

Backtest SMA crossover / RSI strategies on historical data — Sharpe, drawdown, win-rate.

Candlestick + volume + indicators — a playground for technical analysis.

Each block is a brick — watch hashes, nonces, mining and immutability live.

PoW vs PoS vs PBFT — simulate a network and watch forks, finality, and 51% attacks.

Hash, ECDSA, Merkle trees — run them live in your browser, step by step.

Uniswap-style x·y=k pool — swap, add liquidity, watch IL and slippage in real time.

Model escrow / auction contracts as state machines and explore safe transitions.

Vesting, inflation, burns, staking — watch supply and price evolve with structure.

Inputs (income, debt, history) → PD / LGD / EAD → credit score — credit scoring made visual.

Precision / recall / F1 for fraud detection — drag thresholds, see the trade-offs.

Train a decision tree on a loan dataset — see which feature splits where, with Gini impurity.

A 3-layer MLP predicting option prices — watch forward pass and backprop layer by layer.

News + Twitter stream → sentiment score → plotted against the stock price.

Mai picks 1 of 5 methods on Shopee: VietQR, MoMo, Visa, COD, BNPL. Each has different MDR/speed/cost.

OAuth + PSD2: bank → fintech consent, token, and transaction-fetch flow.

Write SQL and watch how JOIN, GROUP BY, and WHERE run on sample data — all in-browser.

Drag entities, draw relationships — auto-generate SQL DDL for a fintech schema.

Mai opens MoMo and authenticates via VNeID — 5 selected fields shared, not everything.

Mai links MoMo ↔ Vietcombank. Understand why no OTP next time — EMVCo token issued.

Mai tops up 100k from VCB to MoMo. Explore DOUBLE-ENTRY BOOKKEEPING (Pacioli 1494).

Mai sends 50k coffee money to Nam. Compare in-network (3 nodes) vs NAPAS 247 (5 nodes).

Mai pays 45k at Highlands Coffee via VietQR. 5-node routing: VCB → NAPAS → TCB → Highlands.

Mai pays ¥30 in Beijing via VietQRGlobal — 7-node cross-border.

Phở Bà Hoa static QR vs Highlands dynamic QR — compare payloads.

Add VCB card to Wallet — DAN in Secure Enclave.

Mai taps iPhone at Circle K — NFC + FaceID + unique cryptogram.

POS at Shopee Mall + VCB chip card — fraud rate 0.6% → 0.15%.

Mai buys iPhone 12M on Shopee with VCB card — 3DS popup + SMS OTP.

Mai sends 50k via VCB app to TCB — NAPAS 247 24/7, <5s.

Mai transfers 15M — Face ID match VNeID required.

3-question quiz on QĐ 2345 biometric thresholds.

Identify real SMS vs phishing vs social engineering.

QR has suspicious name. Pay or cancel? 2 outcome branches.

Mai lost iPhone. Rank 5 emergency actions by priority.

BMC 9 blocks for cases like Momo / Stripe / Revolut — compare side by side.