TravelBucks Development Guide

Date: April 18, 2025
Purpose: Guide a team of 3 junior developers to build and deploy TravelBucks, a multi-currency budgeting app for travelers, in 2 weeks.
Audience: Developers with 0-1 year experience, project lead, stakeholders.

1. Overview

TravelBucks helps travelers like Alex, a student in Tokyo, track spending in foreign currencies (e.g., JPY) against a home currency budget (e.g., USD). The app converts transactions in real-time using daily-cached rates and displays a dual-currency dashboard.

MVP Scope

Login/Creation: Email and password setup.
Currency Setup: Select home currency and foreign currency (search + flags).
Budget Setup: Define categories (e.g., food, travel) and amounts.
Dashboard: Donut chart of budget, transaction list in JPY and USD.
Transactions: Add/edit/delete transactions with auto-conversion.
Deferred: Dark mode, predictive insights, premium features (Stripe).

Tech Stack

Backend: Django (Python), Django REST Framework (DRF)
Frontend: React Native
Database: PostgreSQL
Currency API: exchangerateapi.com (free)
Cache: Redis
Deployment: Heroku
Version Control: GitHub
Monitoring: Sentry, JSON logging

Scale & Constraints

Users: 10–50 daily active users, ~30 transactions/day.
Team: 3 junior developers (0-1 year experience).
Timeline: 2 weeks (2 x 1-week sprints).
Compliance: GDPR (user data), PCI-DSS (future Stripe).

2. Architecture

2.1 Backend (Django)

Structure: Layered for simplicity—DRF ViewSet → Service Layer → Repository → PostgreSQL, with Redis for caching.

User → DRF ViewSet → Service Layer → Repository → PostgreSQL
                   ↓
             Cache Layer (Redis)

Key Components:

Models: Users, budgets, transactions.

# travelbucks/models.py
from django.db import models

class User(models.Model):
    email = models.EmailField(unique=True)
    password = models.CharField(max_length=255)
    home_currency = models.CharField(max_length=3)

class Budget(models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE)
    category = models.CharField(max_length=50)
    amount = models.DecimalField(max_digits=10, decimal_places=2)
    currency = models.CharField(max_length=3)

class Transaction(models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE)
    amount = models.DecimalField(max_digits=10, decimal_places=2)
    converted_amount = models.DecimalField(max_digits=10, decimal_places=2)
    from_currency = models.CharField(max_length=3)
    to_currency = models.CharField(max_length=3)
    category = models.CharField(max_length=50)
    created_at = models.DateTimeField(auto_now_add=True)

Service Layer: Handles business logic (e.g., currency conversion).

# travelbucks/services/conversion.py
import requests
from django.core.cache import cache

class DailyConverter:
    CACHE_KEY = "fx_rates"
    TTL = 24 * 60 * 60  # 24 hours

    @classmethod
    def get_rate(cls, from_ccy: str, to_ccy: str) -> float:
        rates = cache.get(cls.CACHE_KEY)
        if not rates:
            resp = requests.get("https://api.exchangerateapi.com/v4/latest/USD")
            rates = resp.json()["rates"]
            cache.set(cls.CACHE_KEY, rates, cls.TTL)
        return rates[to_ccy] / rates[from_ccy]

    @classmethod
    def convert(cls, amount: float, from_ccy: str, to_ccy: str) -> float:
        rate = cls.get_rate(from_ccy, to_ccy)
        return round(amount * rate, 2)

# travelbucks/services/budget.py
from .conversion import DailyConverter
from .repositories.transaction import TransactionRepo

class BudgetService:
    def __init__(self, user):
        self.user = user
        self.transaction_repo = TransactionRepo()

    def create_transaction(self, amount: float, from_currency: str, to_currency: str, category: str):
        converted_amount = DailyConverter.convert(amount, from_currency, to_currency)
        self.transaction_repo.create(
            user=self.user,
            amount=amount,
            converted_amount=converted_amount,
            from_currency=from_currency,
            to_currency=to_currency,
            category=category
        )

Repository: Abstracts database access.

# travelbucks/repositories/transaction.py
from django.db.models import Model

class TransactionRepo:
    def __init__(self, model: Model = Transaction):
        self.model = model

    def create(self, **attrs):
        return self.model.objects.create(**attrs)

    def list_for_user(self, user, **filters):
        return self.model.objects.filter(user=user, **filters)

API Endpoints: Simple DRF ViewSets.

# travelbucks/views/transaction.py
from rest_framework.viewsets import ModelViewSet
from .models import Transaction
from .serializers import TransactionSerializer

class TransactionViewSet(ModelViewSet):
    queryset = Transaction.objects.all()
    serializer_class = TransactionSerializer

    def perform_create(self, serializer):
        serializer.save(user=self.request.user)

2.2 Frontend (React Native)

Structure: Beginner-friendly layout.

/mobile/src
 ├── components/      # Button, DonutChart
 ├── screens/         # LoginScreen, DashboardScreen
 ├── hooks/           # useAuth, useBudget
 ├── store/           # Redux slices
 ├── services/        # API calls (axios)

Key Components:

State Management: Redux Toolkit for rates, React Query for transactions.

// mobile/src/store/ratesSlice.js
import { createSlice } from '@reduxjs/toolkit';

const ratesSlice = createSlice({
  name: 'rates',
  initialState: { rates: {}, lastFetched: null },
  reducers: {
    setRates(state, action) {
      state.rates = action.payload;
      state.lastFetched = Date.now();
    }
  }
});
export const { setRates } = ratesSlice.actions;
export default ratesSlice.reducer;

// mobile/src/store/index.js
import { configureStore } from '@reduxjs/toolkit';
import ratesReducer from './ratesSlice';
import budgetReducer from './budgetSlice';

export const store = configureStore({
  reducer: {
    rates: ratesReducer,
    budget: budgetReducer
  }
});

API Service: Axios for API calls.

// mobile/src/services/api.js
import axios from 'axios';
import { store } from '../store';
import { setRates } from '../store/ratesSlice';

const api = axios.create({ baseURL: 'http://localhost:8000/api' });
export const fetchRates = async () => {
  const response = await api.get('/rates');
  store.dispatch(setRates(response.data));
  return response.data;
};
export const fetchTransactions = async () => {
  const response = await api.get('/transactions');
  return response.data;
};

Donut Chart: Budget visualization.

// mobile/src/components/DonutChart.js
import { PieChart } from 'react-native-chart-kit';
import { useSelector } from 'react-redux';
import { Dimensions } from 'react-native';

const DonutChart = () => {
  const budget = useSelector(state => state.budget);
  const data = budget.categories.map(cat => ({
    name: cat.name,
    amount: cat.spent,
    color: cat.color || '#'+(Math.random()*0xFFFFFF<<0).toString(16),
    legendFontColor: '#7F7F7F'
  }));
  return (
    <PieChart
      data={data}
      width={Dimensions.get('window').width - 40}
      height={220}
      chartConfig={{ color: () => '#000' }}
      accessor="amount"
      backgroundColor="transparent"
      paddingLeft="15"
      testID="pie-chart"
    />
  );
};

Dashboard: Combines donut chart and transaction list.

// mobile/src/screens/DashboardScreen.js
import { FlatList, Text, View } from 'react-native';
import { useQuery } from '@tanstack/react-query';
import { fetchTransactions } from '../services/api';
import DonutChart from '../components/DonutChart';

const DashboardScreen = () => {
  const { data: transactions } = useQuery(['transactions'], fetchTransactions);
  return (
    <View>
      <DonutChart />
      <FlatList
        data={transactions}
        renderItem={({ item }) => (
          <Text>{item.amount} {item.from_currency} ({item.converted_amount} {item.to_currency})</Text>
        )}
        keyExtractor={item => item.id.toString()}
      />
    </View>
  );
};

2.3 Performance

Backend: Cache rates in Redis (24-hour TTL). Index user_id and created_at in PostgreSQL.
Frontend: Use useMemo for donut chart calculations, FlatList for transactions.

3. Setup Instructions

3.1 Local Development

Clone Repo:

git clone https://github.com/your-org/travelbucks.git

Backend Setup:
```
cd backend
docker-compose up
```
- Creates PostgreSQL, Redis, and Django services.
- Runs at http://localhost:8000.
Frontend Setup:
```
cd mobile
npm install
npm start
```
- Starts React Native at http://localhost:3000.
Environment Variables:
- Add EXCHANGERATE_API_KEY to backend/.env (get from exchangerateapi.com).

Docker Compose:

version: "3.8"
services:
  db:
    image: postgres:13
    environment:
      POSTGRES_DB: travelbucks
      POSTGRES_USER: user
      POSTGRES_PASSWORD: pass
    ports: ["5432:5432"]
  redis:
    image: redis:6
    ports: ["6379:6379"]
  web:
    build: ./backend
    ports: ["8000:8000"]
    depends_on: ["db", "redis"]
    environment:
      DATABASE_URL: postgres://user:pass@db:5432/travelbucks
      CACHE_URL: redis://redis:6379/0
      EXCHANGERATE_API_KEY: your_api_key
  mobile:
    build: ./mobile
    ports: ["3000:3000"]
    depends_on: ["web"]

Backend Dockerfile:

FROM python:3.10-slim
WORKDIR /app
COPY requirements.txt ./
RUN pip install -r requirements.txt
COPY . .
CMD ["gunicorn", "travelbucks.wsgi:application", "--bind", "0.0.0.0:8000"]

Mobile Dockerfile:

FROM node:16
WORKDIR /app
COPY package.json ./
RUN npm install
COPY . .
CMD ["npm", "start"]

Requirements (backend/requirements.txt):

django==4.2
djangorestframework==3.14
psycopg2-binary==2.9
requests==2.28
django-redis==5.2
gunicorn==20.1
pytest==7.4
pytest-django==4.5

Package.json (mobile/package.json):

{
  "dependencies": {
    "@reduxjs/toolkit": "^1.9",
    "@tanstack/react-query": "^4.29",
    "axios": "^1.4",
    "react-native": "^0.71",
    "react-native-chart-kit": "^6.12",
    "react-redux": "^8.0"
  },
  "devDependencies": {
    "@testing-library/react-native": "^12.1",
    "jest": "^29.5",
    "eslint": "^8.40"
  }
}

3.2 Deployment (Heroku)

Create Heroku app: heroku create travelbucks-prod.
Add add-ons: heroku addons:create heroku-postgresql:hobby-dev, heroku addons:create heroku-redis:hobby-dev.

Set environment variables:

heroku config:set DATABASE_URL=<postgres-url>
heroku config:set CACHE_URL=<redis-url>
heroku config:set EXCHANGERATE_API_KEY=<your-key>

Deploy via GitHub Actions (see CI/CD below).

4. Development Plan (2 Weeks)

Timeline: 2 x 1-week sprints, daily tasks for 3 developers (D1, D2, D3).
Goal: Deliver MVP (login, currency setup, budget, dashboard, transactions) by April 30, 2025.
Mentoring: Daily 15-minute check-ins, 1-hour pair programming weekly, 30-minute Lunch & Learn weekly.

Week 1: Foundation & Core Backend

Goal: Setup repo, build login, currency conversion, and transaction backend.

Day 1:

D1: Create GitHub repo (travelbucks), add backend and mobile folders, setup docker-compose.yml, and GitHub Actions.
```
git init
git add .
git commit -m "feat: initial repo setup"
git push origin main
```

D2: Implement User model, login API (/api/login), and password hashing.

# travelbucks/views/user.py
from django.contrib.auth.hashers import make_password, check_password
from rest_framework.views import APIView
from rest_framework.response import Response

class LoginView(APIView):
    def post(self, request):
        user = User.objects.get(email=request.data['email'])
        if check_password(request.data['password'], user.password):
            return Response({"message": "Logged in"})
        return Response({"error": "Invalid credentials"}, status=401)

D3: Write README.md and setup Swagger UI (/docs/).
Mentor: Setup repo, explain Docker Compose.

Day 2:

D1: Implement DailyConverter with exchangerateapi.com and Redis.
D2: Create Budget model and /api/budgets endpoint.

D3: Write pytest tests for DailyConverter.

# travelbucks/tests/test_conversion.py
import pytest
from services.conversion import DailyConverter

@pytest.mark.django_db
def test_daily_converter():
    amount = DailyConverter.convert(100, 'USD', 'JPY')
    assert isinstance(amount, float)
    assert amount > 0

Mentor: Pair program on DailyConverter.

Day 3:
- D1: Create Transaction model and TransactionRepo.
- D2: Build /api/transactions endpoint with BudgetService.
- D3: Write pytest tests for /api/transactions.
- Mentor: Explain service layer, review PRs.
Day 4:
- D1: Setup Heroku app (travelbucks-prod), add PostgreSQL/Redis.
- D2: Add indexes to user_id, created_at in PostgreSQL.
```
CREATE INDEX idx_user_id ON transactions(user_id);
CREATE INDEX idx_created_at ON transactions(created_at);
```
- D3: Write ADR for Heroku (docs/adr/2025-04-18-use-heroku.md).
- Mentor: Host Lunch & Learn on Django models.

Day 5:

D1: Setup Sentry for backend error tracking.

# travelbucks/settings.py
import sentry_sdk
sentry_sdk.init(dsn="your-sentry-dsn", traces_sample_rate=1.0)

D2: Add JSON logging.

import logging, json_log_formatter
formatter = json_log_formatter.JSONFormatter()
handler = logging.StreamHandler()
handler.setFormatter(formatter)
logging.getLogger().addHandler(handler)

D3: Test backend locally, fix bugs.
Mentor: Review progress, plan Week 2.

Week 2: Frontend & Integration

Goal: Build React Native UI, integrate with backend, deploy.

Day 6:

D1: Setup React Native with Redux Toolkit and React Query.

// mobile/src/App.js
import { Provider } from 'react-redux';
import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
import { store } from './store';
import DashboardScreen from './screens/DashboardScreen';

const queryClient = new QueryClient();
export default function App() {
  return (
    <Provider store={store}>
      <QueryClientProvider client={queryClient}>
        <DashboardScreen />
      </QueryClientProvider>
    </Provider>
  );
}

D2: Build LoginScreen with email/password form.

// mobile/src/screens/LoginScreen.js
import { useState } from 'react';
import { TextInput, Button, View } from 'react-native';
import axios from 'axios';

const LoginScreen = () => {
  const [email, setEmail] = useState('');
  const [password, setPassword] = useState('');
  const login = async () => {
    try {
      await axios.post('http://localhost:8000/api/login', { email, password });
      alert('Logged in!');
    } catch (e) {
      alert('Login failed');
    }
  };
  return (
    <View>
      <TextInput placeholder="Email" onChangeText={setEmail} />
      <TextInput placeholder="Password" onChangeText={setPassword} secureTextEntry />
      <Button title="Login" onPress={login} />
    </View>
  );
};

D3: Write Jest tests for LoginScreen.

// mobile/src/screens/__tests__/LoginScreen.test.js
import { render, fireEvent } from '@testing-library/react-native';
import LoginScreen from '../LoginScreen';

test('submits login form', () => {
  const { getByPlaceholderText, getByText } = render(<LoginScreen />);
  fireEvent.changeText(getByPlaceholderText('Email'), 'test@example.com');
  fireEvent.changeText(getByPlaceholderText('Password'), 'password');
  fireEvent.press(getByText('Login'));
  // Add mock axios to test API call
});

Mentor: Explain Redux, review PRs.

Day 7:
- D1: Build DonutChart component with react-native-chart-kit.
- D2: Create DashboardScreen with FlatList for transactions.
- D3: Write Jest tests for DonutChart.
- Mentor: Pair program on DashboardScreen.

Day 8:

D1: Implement currency setup screen (search + flags).

// mobile/src/screens/CurrencySetupScreen.js
import { useState } from 'react';
import { TextInput, Button, View } from 'react-native';
import { useDispatch } from 'react-redux';
import { setRates } from '../store/ratesSlice';

const CurrencySetupScreen = () => {
  const [homeCurrency, setHomeCurrency] = useState('USD');
  const [foreignCurrency, setForeignCurrency] = useState('JPY');
  const dispatch = useDispatch();
  const save = () => {
    dispatch(setRates({ [foreignCurrency]: 1 })); // Mock rates
    alert('Currencies saved');
  };
  return (
    <View>
      <TextInput placeholder="Home Currency (e.g., USD)" onChangeText={setHomeCurrency} />
      <TextInput placeholder="Foreign Currency (e.g., JPY)" onChangeText={setForeignCurrency} />
      <Button title="Save" onPress={save} />
    </View>
  );
};

D2: Build budget setup screen (categories, amounts).
D3: Write ADR for GDPR (docs/adr/2025-04-25-gdpr-compliance.md).
Mentor: Host Lunch & Learn on React Native navigation.

Day 9:

D1: Add transaction CRUD form to DashboardScreen.

// mobile/src/components/TransactionForm.js
import { useState } from 'react';
import { TextInput, Button, View } from 'react-native';
import axios from 'axios';

const TransactionForm = () => {
  const [amount, setAmount] = useState('');
  const [currency, setCurrency] = useState('JPY');
  const [category, setCategory] = useState('Food');
  const addTransaction = async () => {
    await axios.post('http://localhost:8000/api/transactions', {
      amount: parseFloat(amount),
      from_currency: currency,
      to_currency: 'USD',
      category
    });
    setAmount('');
  };
  return (
    <View>
      <TextInput placeholder="Amount" onChangeText={setAmount} keyboardType="numeric" />
      <TextInput placeholder="Currency" onChangeText={setCurrency} />
      <TextInput placeholder="Category" onChangeText={setCategory} />
      <Button title="Add Transaction" onPress={addTransaction} />
    </View>
  );
};

D2: Setup Sentry for frontend errors.

// mobile/src/index.js
import * as Sentry from '@sentry/react-native';
Sentry.init({ dsn: 'your-sentry-dsn' });

D3: Write Detox E2E tests for login → transaction flow.
Mentor: Review frontend integration.

Day 10:
- D1: Deploy to Heroku, test production API.
- D2: Fix bugs, polish UI (e.g., add retry for failed API calls).
- D3: Update README.md with deployment steps.
- Mentor: Demo app, prepare for launch.

5. Team Workflow

5.1 Mentoring

Daily Check-Ins: 15 minutes to discuss blockers.
Pair Programming: 1-hour session weekly (e.g., Day 2 for DailyConverter).
Lunch & Learn: 30 minutes weekly (Week 1: Django models; Week 2: React Native navigation).
Notion Guide: Create “TravelBucks Dev Guide” with tutorials (e.g., Django REST Framework, React Native).

5.2 Code Reviews

PR Template:

**PR Checklist**:
- [ ] Logic in services (backend) or hooks (frontend)
- [ ] Tests included
- [ ] Linter passes (flake8, eslint)
- [ ] API docs updated (if endpoint changed)

Process: Mentor reviews PRs, provides clear feedback (e.g., “Move this to BudgetService”).

5.3 Pitfalls & Solutions

API-Client Drift: Generate TypeScript interfaces with openapi-generator.

openapi-generator-cli generate -i backend/swagger.yaml -g typescript-axios -o mobile/src/api

Rate Fetch Failures: Fallback to last-known rates in Redux.

// mobile/src/services/api.js
export const fetchRates = async () => {
  try {
    const response = await api.get('/rates');
    store.dispatch(setRates(response.data));
    return response.data;
  } catch (e) {
    return store.getState().rates.rates; // Fallback
  }
};

Time-Zone Bugs: Store created_at in UTC, convert with date-fns.

import { format } from 'date-fns-tz';
const utcDate = new Date('2025-04-18T10:00:00Z');
const localDate = format(utcDate, 'yyyy-MM-dd HH:mm:ss', { timeZone: 'Asia/Tokyo' });

6. CI/CD

GitHub Actions:

name: CI
on: [push, pull_request]
jobs:
  test:
    runs-on: ubuntu-latest
    services:
      postgres:
        image: postgres:13
        env:
          POSTGRES_DB: travelbucks
          POSTGRES_USER: user
          POSTGRES_PASSWORD: pass
        ports: ["5432:5432"]
      redis:
        image: redis:6
        ports: ["6379:6379"]
    steps:
      - uses: actions/checkout@v3
      - uses: actions/setup-python@v4
        with: { python-version: '3.10' }
      - run: pip install -r backend/requirements.txt
      - run: python backend/manage.py migrate
      - run: pytest backend --cov --cov-fail-under=80
      - run: npm install --prefix mobile && npm test --prefix mobile
  deploy:
    if: github.ref == 'refs/heads/main'
    runs-on: ubuntu-latest
    needs: test
    steps:
      - uses: actions/checkout@v3
      - name: Deploy to Heroku
        uses: akhileshns/heroku-deploy@v3.12.12
        with:
          heroku_api_key: ${{ secrets.HEROKU_API_KEY }}
          heroku_app_name: "travelbucks-prod"
          heroku_email: "team@example.com"

Testing:

Unit Tests: pytest (Django), Jest (React Native).
Integration Tests: Test API endpoints with PostgreSQL.
E2E Tests: Detox for login → transaction flow (Day 9).
Coverage: 80% minimum.

7. Documentation

README.md:

# TravelBucks
Multi-currency budgeting app for travelers.

## Quick Start
1. Clone: `git clone https://github.com/your-org/travelbucks.git`
2. Backend: `cd backend && docker-compose up`
3. Frontend: `cd mobile && npm install && npm start`
4. Env: Add `EXCHANGERATE_API_KEY` to `backend/.env`

## Deployment
- Heroku app: `travelbucks-prod`
- Add-ons: PostgreSQL, Redis

Architecture.md:

@startuml
actor User
User --> [React Native]
[React Native] --> [Django API]
[Django API] --> [Service Layer]
[Service Layer] --> [Repository]
[Repository] --> [PostgreSQL]
[Service Layer] --> [Redis]
[Service Layer] --> [exchangerateapi.com]
@enduml

API Docs: Swagger UI at /docs/.

# travelbucks/urls.py
from rest_framework import permissions
from drf_yasg.views import get_schema_view
from drf_yasg import openapi

schema_view = get_schema_view(
    openapi.Info(title="TravelBucks API", default_version='v1'),
    public=True,
    permission_classes=(permissions.AllowAny,),
)
urlpatterns = [
    path('docs/', schema_view.with_ui('swagger', cache_timeout=0), name='schema-swagger-ui'),
    # other URLs
]

ADRs:
- docs/adr/2025-04-18-use-heroku.md
- docs/adr/2025-04-25-gdpr-compliance.md

8. Compliance

GDPR:

Encrypt passwords with make_password.
Add privacy policy in app (e.g., “We store email and transactions securely”).
Allow account deletion via settings (post-MVP).

# travelbucks/views/user.py
from django.contrib.auth.hashers import make_password
class UserViewSet(ModelViewSet):
    def create(self, request):
        request.data['password'] = make_password(request.data['password'])
        return super().create(request)

PCI-DSS: Plan for Stripe (post-MVP) using SDK to avoid storing card data.

ADR:

# ADR 002: GDPR Compliance
**Date**: 2025-04-25
**Decision**: Encrypt passwords, add privacy policy, plan for account deletion.
**Rationale**: Protects user data, complies with GDPR.

Action: Consult a legal expert before launch.

9. Monitoring

Backend: Sentry for errors, JSON logging for analysis.
Frontend: Sentry for JavaScript errors, Firebase Crashlytics for crashes.

Fallback UI: Retryable errors (e.g., “Failed to load rates. Retry?”).

// mobile/src/screens/DashboardScreen.js
import { Button } from 'react-native';
const DashboardScreen = () => {
  const { data, error, refetch } = useQuery(['transactions'], fetchTransactions);
  if (error) return <Button title="Retry" onPress={refetch} />;
  // Render dashboard
};

10. Next Steps

Immediate:
- Day 1: D1 sets up repo, D2 starts login, D3 writes README.md.
- Mentor: Join daily check-ins, review PRs, host Lunch & Learn.
Post-MVP:
- Add dark mode, filters.
- Implement Stripe for premium features.
- Enhance GDPR with account deletion.

Resources:

Contact: Mentor available for questions via Slack/email.

Let’s build TravelBucks and help travelers like Alex stay on budget!

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TravelBucks Development Guide

1. Overview

MVP Scope

Tech Stack

Scale & Constraints

2. Architecture

2.1 Backend (Django)

2.2 Frontend (React Native)

2.3 Performance

3. Setup Instructions

3.1 Local Development

3.2 Deployment (Heroku)

4. Development Plan (2 Weeks)

Week 1: Foundation & Core Backend

Week 2: Frontend & Integration

5. Team Workflow

5.1 Mentoring

5.2 Code Reviews

5.3 Pitfalls & Solutions

6. CI/CD

7. Documentation

8. Compliance

9. Monitoring

10. Next Steps

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TravelBucks Development Guide

1. Overview

MVP Scope

Tech Stack

Scale & Constraints

2. Architecture

2.1 Backend (Django)

2.2 Frontend (React Native)

2.3 Performance

3. Setup Instructions

3.1 Local Development

3.2 Deployment (Heroku)

4. Development Plan (2 Weeks)

Week 1: Foundation & Core Backend

Week 2: Frontend & Integration

5. Team Workflow

5.1 Mentoring

5.2 Code Reviews

5.3 Pitfalls & Solutions

6. CI/CD

7. Documentation

8. Compliance

9. Monitoring

10. Next Steps