What I Wish I Knew Before Building My First Client Website

This content originally appeared on DEV Community and was authored by Arbythecoder

What You'll Learn

• How to avoid the "jack-of-all-trades" trap that kills projects
• Payment integration strategies that actually work
• Why backend fundamentals matter more than trendy frameworks
• Practical tips for managing international clients
• Code examples and tools that save time and headaches

When I landed my first paying client, I thought I had it all figured out.

Spoiler alert: I didn't.

Here's what I learned the hard way (so you don't have to).

❌ Mistake #1: Trying to Be Everything to Everyone

What I Promised:

✅ Frontend Development
✅ Backend Development  
✅ UI/UX Design
✅ Database Architecture
✅ Payment Integration
✅ Project Management

What I Could Actually Do:

✅ Backend Development (sort of)
❌ Everything else (badly)

The Reality Check:
I spent 3 weeks on a design that a proper designer could have done in 3 days.

💡 Practical Tip:
Pick ONE thing you're good at. Master it. Then expand.

Quick Specialization Checklist:

• [ ] Can you build this feature without YouTube tutorials?
• [ ] Do you understand the underlying concepts?
• [ ] Can you debug it when it breaks?
• [ ] Would you trust this code in production?

If you answered "no" to any of these, you're not ready to charge for it.

❌ Mistake #2: Payment Integration Nightmare

The Problem:

Client: "Can users pay through the site?"
Me: "Of course!" (I had never done this before)

What Happened:

• Account blocked by payment processors (twice!)
• Test transactions failing randomly
• No idea about PCI compliance
• Webhooks? What are those?

The Solution:

Start simple, then get complex.

Beginner-Friendly Payment Options:

// Start with Stripe Checkout (hosted solution)
const stripe = require('stripe')(process.env.STRIPE_SECRET_KEY);

app.post('/create-checkout-session', async (req, res) => {
  try {
    const session = await stripe.checkout.sessions.create({
      payment_method_types: ['card'],
      line_items: [{
        price_data: {
          currency: 'usd',
          product_data: {
            name: 'Website Service',
          },
          unit_amount: 2000, // $20.00
        },
        quantity: 1,
      }],
      mode: 'payment',
      success_url: 'https://yourdomain.com/success',
      cancel_url: 'https://yourdomain.com/cancel',
    });

    res.json({ id: session.id });
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
});

⚠️ Always Use Sandbox First:

# Test with Stripe CLI
stripe listen --forward-to localhost:3000/webhook

Payment Integration Checklist:

• [ ] Test in sandbox environment
• [ ] Handle failed payments gracefully
• [ ] Set up proper error logging
• [ ] Understand webhook security
• [ ] Know your compliance requirements

❌ Mistake #3: Weak Backend Fundamentals

The Problem:

I jumped to Node.js because it was trendy, but I didn't understand:

• How databases actually work
• Authentication vs authorization
• API design principles
• Error handling strategies
• Security best practices

The Wake-Up Call:

// My first "secure" login endpoint 😅
app.post('/login', (req, res) => {
  const { username, password } = req.body;

  // DON'T DO THIS!
  const query = `SELECT * FROM users WHERE username = '${username}' AND password = '${password}'`;

  // This is vulnerable to SQL injection!
  db.query(query, (err, results) => {
    if (results.length > 0) {
      res.json({ message: 'Login successful' });
    } else {
      res.json({ message: 'Invalid credentials' });
    }
  });
});

The Better Approach:

// Proper authentication with hashing and prepared statements
const bcrypt = require('bcrypt');
const jwt = require('jsonwebtoken');

app.post('/login', async (req, res) => {
  try {
    const { username, password } = req.body;

    // Use prepared statements to prevent SQL injection
    const query = 'SELECT * FROM users WHERE username = ?';
    const results = await db.query(query, [username]);

    if (results.length === 0) {
      return res.status(401).json({ error: 'Invalid credentials' });
    }

    const user = results[0];
    const validPassword = await bcrypt.compare(password, user.password);

    if (!validPassword) {
      return res.status(401).json({ error: 'Invalid credentials' });
    }

    const token = jwt.sign(
      { userId: user.id, username: user.username },
      process.env.JWT_SECRET,
      { expiresIn: '24h' }
    );

    res.json({ token, user: { id: user.id, username: user.username } });
  } catch (error) {
    console.error('Login error:', error);
    res.status(500).json({ error: 'Internal server error' });
  }
});

Backend Fundamentals Checklist:

• [ ] Understand database relationships
• [ ] Know the difference between authentication and authorization
• [ ] Can implement proper error handling
• [ ] Understand security basics (hashing, HTTPS, input validation)
• [ ] Know how to structure APIs properly

💡 Working with International Clients

The Challenges:

• Time zone differences
• Payment method compatibility
• Cultural communication styles
• Currency conversion headaches

Practical Solutions:

Time Zone Management:

// Use UTC for all database timestamps
const moment = require('moment-timezone');

const createEvent = (eventData, clientTimezone) => {
  return {
    ...eventData,
    // Store in UTC
    createdAt: moment().utc().toISOString(),
    // Display in client's timezone
    displayTime: moment().tz(clientTimezone).format('YYYY-MM-DD HH:mm')
  };
};

Payment Solutions by Region:

• US/Canada: Stripe, Square
• Europe: Stripe, PayPal
• Asia: PayPal, local payment gateways
• Africa: Flutterwave, Paystack

International Client Checklist:

• [ ] Agree on communication schedule upfront
• [ ] Use project management tools with timezone support
• [ ] Research local payment preferences
• [ ] Have backup payment methods ready
• [ ] Understand basic cultural communication differences

🛠️ Tools That Save Your Sanity

Project Management:

# Essential tools for client projects
npm install -g @vercel/cli  # Easy deployment
npm install helmet express-rate-limit  # Security
npm install dotenv  # Environment variables
npm install winston  # Proper logging

Error Monitoring:

// Basic error logging setup
const winston = require('winston');

const logger = winston.createLogger({
  level: 'info',
  format: winston.format.json(),
  transports: [
    new winston.transports.File({ filename: 'error.log', level: 'error' }),
    new winston.transports.File({ filename: 'combined.log' })
  ]
});

// Use in your routes
app.post('/api/something', (req, res) => {
  try {
    // Your code here
  } catch (error) {
    logger.error('API Error:', error);
    res.status(500).json({ error: 'Something went wrong' });
  }
});

🚀 What I'd Do Differently

The "Start Over" Checklist:

• [ ] Master one backend framework completely
• [ ] Learn basic UI/UX principles
• [ ] Build 3 personal projects before taking client work
• [ ] Set clear project boundaries upfront
• [ ] Network with designers and other developers
• [ ] Understand basic business concepts (contracts, invoicing)
• [ ] Always test in staging before production
• [ ] Document everything (seriously, everything)

Quick Win Tips:

1. Use boilerplates for common setups
2. Test payments in sandbox first, always
3. Set up monitoring from day one
4. Version control everything
5. Have a backup payment processor ready

🎯 Key Takeaways

For Beginners:

• It's okay to not know everything
• Clients pay you to figure things out
• Every expert was once a beginner
• Ask questions, lots of them

For Experienced Devs:

• Share your knowledge with beginners
• Remember your first client horror stories
• Mentor when you can

For Everyone:

• Mistakes are learning opportunities
• Build incrementally
• Always have a backup plan

🔗 Useful Resources

• Stripe Documentation - Payment integration
• MDN Web Docs - Web fundamentals
• Node.js Security Checklist
• API Design Best Practices

What was your biggest "learn the hard way" moment? Drop it in the comments! 👇

#beginners #webdev #nodejs #freelancing #javascript #backend #career

This content originally appeared on DEV Community and was authored by Arbythecoder

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