Emma Ochogwu

Software engineer | Backend | NodeJs | Typescript | Python | FastApi | biochemist | Alx_africa SE Alumni

[Ritesh Roushan @devXritesh]

Let's Go through and design scalable system:

1. Never call the email provider directly

Bad design:

API → Email Provider

If the provider fails:

- API blocks
- Requests fail
- Emails are lost

Instead:

API
↓
Message Queue
↓
Email Workers
↓
Email Provider

The API responds immediately.

The queue absorbs traffic spikes.

2. Put every email into a durable queue

Use Kafka, RabbitMQ, or SQS.

Each request becomes an event.

SendEmail
{
userId,
email,
template,
idempotencyKey
}

Even if every worker crashes, the message remains in the queue.

No email is lost.

3. Process emails asynchronously

Workers consume messages from the queue.

Queue
↓
Worker
↓
Provider

Need more throughput?

Add more workers.

The API doesn't change.

4. Retry failures intelligently

If the provider is temporarily unavailable:

- Retry automatically
- Use exponential backoff
- Avoid retry storms

Never retry endlessly.

5. Prevent duplicate emails

Retries happen.

Workers crash.

Network timeouts happen.

Before sending, check an idempotency key.

If the email has already been delivered:

Skip it.

This guarantees one email per request.

6. Support multiple providers

Don't couple your system to one vendor.

Worker
↓
Email Adapter
├── SendGrid
├── Amazon SES
└── Mailgun

If one provider fails,

fail over automatically to another.

Users shouldn't notice.

7. Handle permanent failures

Some emails will never succeed.

Invalid email addresses.

Blocked domains.

After a fixed number of retries:

Move them to a Dead Letter Queue.

Operations can inspect and replay them later.

8. Monitor everything

Track:

- Queue depth
- Retry count
- Delivery success rate
- Provider latency
- Dead Letter Queue size
- Failure rate

If you can't observe it,

you can't operate it.

Production systems aren't designed for happy paths.

They're designed so third-party failures don't become your failures.

[Emma Ochogwu @EmmaOchogwu]

@mikaeldyk This is becoming boring and making X lose its value.

[All day Astronomy @forallcurious]

BREAKING🚨: Japan is planning to build a solar ring around the Moon that will power Earth forever.

[Emma Ochogwu @EmmaOchogwu]

@sironyeka Hi

[Emma Ochogwu @EmmaOchogwu]

@sironyeka Hello

[Emma Ochogwu @EmmaOchogwu]

@AkorjeromeAdams @NGSuperEagles Congratulations to us

[Emma Ochogwu @EmmaOchogwu]

@entreprenur00 @grok combine the threads

[Emma Ochogwu @EmmaOchogwu]

Happy birthday to me 🎈🎉

[Emma Ochogwu @EmmaOchogwu]

@DanielRegha @MTNNG Good morning... I did a subscription of 45gb on always on but the data didn't appear on my balance rather than the rollover I've had before.

Please I need your urgent attention

[Emma Ochogwu @EmmaOchogwu]

@davido @MTNNG Good morning... I did a subscription of 45gb on always on but the data didn't appear on my balance rather than the rollover I've had before.
Please I need your urgent attention

[Emma Ochogwu @EmmaOchogwu]

@davido @FirstBankngr Why I can't make transactions on the first bank mobile app. I need to make an urgent transfer and have been facing errors. This is bad

[Emma Ochogwu @EmmaOchogwu]

@LinkedInHelp @mohamedajeed76 @LinkedInHelp @ryroslansky My account was unexpectedly restricted and I’m unable to do anything due to errors . I rely on LinkedIn for my professional work, please assist or escalate this ASAP. Support hasn’t resolved it. #LinkedInSupport

[Emma Ochogwu @EmmaOchogwu]

Spent 4 days fixing broken endpoints....Docker ran fine, but local didn’t.
At 3am, I gave up & shut down my laptop for the first time in 2 weeks.

Next morning? Everything worked.

🧠 Reminder: Your PC needs rest too. Don’t just sleep it. Reboot it. 💻✨

[Emma Ochogwu @EmmaOchogwu]

@JOBCORNER247 Node js Backend developer role.. remote or hybrid in Abuja

[Emma Ochogwu @EmmaOchogwu]

@Tech4DevHQ I need your communication channel please.

[Emma Ochogwu @EmmaOchogwu]

@fatumayattani Great 😃

[Emma Ochogwu @EmmaOchogwu]

@devJames_ Boss I've been trying to send you DM regarding this but I've not been able to...

Please how do I reach out to you?

[Emma Ochogwu @EmmaOchogwu]

@amosuibk Node Js backend role

[CrownprinceCom2 @CrownprinceCom2]

THE DAY HAS COME !
OUR VOICES MUST BE HEARD
FOR THE SAKE OF OUR CHILDREN.
Will you Join the Protest?
If Yes! Repost ✅

#protest24 Protesters #EndBadGovernanceInNigeria #EndBadGovernanceProtest #AkpabioMustGo

[Emma Ochogwu @EmmaOchogwu]

Excited to share my feature-rich e-commerce site built with the MERN stack! Highlights:

💾 Mongoose for MongoDB
📧 Nodemailer for customer communication
💳 Stripe for payments
🔒 JWT for security
🔑 Google OAuth for easy login

#alx_se_alumni #backend_lover #nodeJs