Mr. Pepe

Jesus revealed, Jesus glorified… Business Process Automation #Camunda

[Smart👨‍💻 | Software Engineer @smartnakamoura]

If you’re a backend engineer, get genuinely good at SQL.

Resources:

→ PostgreSQL Exercises
→ SQLBolt
→ Mode SQL Tutorial
→ LeetCode Database
→ Use The Index, Luke

Master:

JOINs
CTEs
Window functions
Indexes
Transactions
Aggregations
Query plans

Being able to write:

SELECT * FROM users

is not database expertise.

[Smart👨‍💻 | Software Engineer @smartnakamoura]

If you’re a Nigerian backend engineer, bookmark these.

→ NIBSS
→ CBN Payments System resources
→ NIP documentation
→ NQR resources
→ BVN resources
→ Open Banking Nigeria
→ NDPC
→ NIMC

Learn the infrastructure before building on top of it.

There is a whole payment system underneath that beautiful fintech UI.

[Smart👨‍💻 | Software Engineer @smartnakamoura]

If you work with payment APIs, learn webhooks properly.

Bookmark:

→ Paystack docs
→ Stripe docs
→ GitHub webhook docs
→ Svix webhook resources
→ OWASP

Understand:

Signature verification
Retries
Duplicate events
Idempotency
Ordering
Timeouts
Replay attacks

A webhook is an external system calling your backend.

Treat it like an untrusted request.

[Abhishek Singh @0xlelouch_]

90% of backend engineering in 2026 comes down to mastering these 10 concepts:

1) Concurrency + backpressure
Bound every queue, thread pool, and consumer; dropping work is often better than melting the DB.

2) Data modeling + invariants
Write down what must never break (unique, monotonic, balanced ledger) and enforce it in the database, not in vibes.

3) Idempotency + retries
Every network call will retry; use idempotency keys and dedupe so at-least-once delivery does not become double-charging.

4) Consistency tradeoffs
Know where you need read-your-writes vs eventual; most outages are mismatched expectations, not bad code.

5) Cache correctness
TTL is not a strategy; handle stampedes, negative caching, and invalidation when the source of truth changes.

6) Deploy safety
Small rollouts, fast rollback, and feature flags beat hero debugging; schema changes need a zero-downtime plan.

7) Observability that answers questions
Golden signals plus high-cardinality traces tied to a request ID; logs without context are just expensive text.

8) Production debugging
Learn to prove where time went: CPU vs IO vs lock vs network; p95 is usually one hot key or one slow dependency.

9) Security basics that bite
AuthZ checks at every boundary, least-privilege IAM, secrets rotation, and input validation that assumes hostile clients.

10) Tooling and runbooks
Repeatable local repro (docker, seed data), one-command deploy, and a runbook that says what to check at 2am (dashboards, queries, kill switches)

[V2roskey @v2roskey1]

NAFDAC published a list of fake products in Nigeria

[Smart👨‍💻 | Software Engineer @smartnakamoura]

If you’re stuck as a developer, stop adding more courses.

Pick one project.

Then use:

→ Documentation
→ GitHub issues
→ Source code
→ RFCs
→ Stack Overflow
→ Engineering blogs
→ Postman
→ Your debugger

Build.

Break it.

Read.

Fix it.

Repeat.

That’s where the skill comes from.

[Tanuj @tanujDE3180]

Backend Interview Question:

Your cron job runs once every day at 2:00 PM.

One day, it executes 3 times.

You verify:

- No duplicate servers
- No manual trigger
- No deployment
- No code changes
- No duplicate cron entry

The scheduler shows only one job.

How can the same scheduled job execute three times in production?

[Mahesh Nani @maheshnani122]

As a dev, do you know the difference between

- API Gateway
- Load Balancer

90% devs use them interchangeably

[Smart👨‍💻 | Software Engineer @smartnakamoura]

Backend engineers who want to understand production:

Learn these.

Linux
Docker
GitHub Actions
NGINX
Terraform
AWS
Prometheus
Grafana
OpenTelemetry

Then learn:

Logs
Metrics
Tracing
Health checks
Secrets
Deployments
Rollback
Backups

“Works on my machine” is not an infrastructure strategy.

[Smart👨‍💻 | Software Engineer @smartnakamoura]

If you want to understand payment infrastructure:

Start with these:

→ Paystack docs
→ Flutterwave docs
→ Interswitch docs
→ Stripe docs
→ Visa Developer Center
→ Mastercard Developers
→ PCI SSC

Pay attention to:

Authorization
Capture
Settlement
Reversal
Refund
Chargeback
Webhook
Idempotency
Reconciliation

The API call is the easy part.

[Dark Coder @dark_coderz]

Which HTTP status code means “Too Many Requests”?

A. 401
B. 403
C. 404
D. 429

[Uday👨‍💻 @uday_devops]

What's the first Linux command every developer should learn?

[Adam | Full stack developer @fullstacklover]

Is there a better way to handle authentication without access and refresh tokens ??

[SumitM @SumitM_X]

You have two tables: users and orders.

You need to fetch all users who have placed at least one order...

Which one would you use:

INNER JOIN

LEFT JOIN

EXISTS

[24 @24owolabi]

Get in joor finally 🎉

[Stanlee.dev @stanlee0nX]

There’s the kind of frustration you’d get from debugging you’d just carry all env values and paste to Claude😑😑

[The Tech Prophet (Amospikins) @Amospikins]

Why Your API Was Fast Until Real Users Arrived

[Mr. Pepe @Manlike_Pepe]

@realFemiOtedola @cuppymusic 😂 Everybody know wetin dem dey do sef…

[Mr. Pepe @Manlike_Pepe]

@mreazi Mr Eazi allow God use you

[• nanou • @NanouuSymeon]

JavaScript Roadmap 2026

🟨 Variables
🔤 Data types
➕ Operators
🔀 Conditions
🔁 Loops
🧩 Functions
➡️ Arrow functions
📦 Arrays
🗂️ Objects
✨ Spread/rest
🧱 Destructuring
🌳 DOM
🖱️ Events
⏱️ Async JavaScript
🤝 Promises
⌛ async/await
🌐 Fetch API
🧯 Error handling
📦 Modules
💾 LocalStorage
🔧 npm
⚡ Vite
⚛️ React
🟦 TypeScript
🚀 Build. Build. Build.