Sajad | Laravel expert

Allah is so Gr8t..!! Passionate Liverpool fan. Passionate abt football,plays,watches,talks football. Software Engineer. Loves travelling.

[Umesh Kumar Yadav @Umesh__digital]

Top 10 Systems Design questions asked in interviews:

1. Design a URL Shortener
2. Design a Rate Limiter
3. Design a Distributed Cache
4. Design a Load Balancer
5. Design a Notification System
6. Design a News/ Twitter Feed system
7. Design a Chat / Messaging system
8. Design a File Storage system
9. Design a Payment system
10. Design a Job Queue / Background processing system

[Edgex @SahilExec]

Backend Developer interviewer:

We can write 80% of our code with AI why should we still hire you.

What will be your response?

[Uday���‍💻 @uday_devops]

Interviewer:

How do you scale a web app in AWS?

[Edison @CodeEdison]

Backend development is “simple” as long as you understand these fundamentals:

HTTP basics
• Methods
• Status codes
• Request and response headers

Security & identity
• Authentication vs authorization
• JWTs, sessions, and cookies
• OAuth 2.0
• Password hashing (bcrypt / Argon2)
• Salting and peppering
• 2FA and SSO
• RBAC and ABAC

API fundamentals
• API design principles
• RESTful APIs
• GraphQL
• WebSockets
• API versioning
• Rate limiting and throttling
• Pagination, filtering, and sorting
• File uploads and streaming

Server concepts
• Middleware
• Error handling
• Logging and monitoring
• APM (performance monitoring)
• Server-side rendering

Databases
• Database design
• SQL and NoSQL
• Indexing and query optimization
• ACID properties
• CAP theorem
• Normalization vs denormalization
• ORMs
• Connection pooling
• Transactions, migrations, and seeding

Caching & performance
• Caching strategies
• Redis and Memcached
• CDN integration

Scalability & architecture
• Load balancing
• Horizontal vs vertical scaling
• Monoliths, microservices, and SOA
• Message queues and Pub/Sub
• Event-driven systems
• CQRS and Saga patterns
• API gateways and service mesh

Infrastructure & DevOps
• Docker containers
• Kubernetes orchestration
• CI/CD pipelines
• Environment variables
• Configuration and secrets management

Security hardening
• CORS
• CSRF protection
• XSS prevention
• SQL injection prevention
• Input validation and output sanitization

Background processing
• Background jobs
• Cron jobs and schedulers
• Worker processes

Concurrency & runtime
• Async/await
• Promises and callbacks
• Thread pools
• Process and memory management
• Garbage collection

Quality & tooling
• Testing (unit, integration, E2E)
• Mocking and stubbing
• API documentation (Swagger / OpenAPI)
• Postman or Insomnia
• Git and version control
• Code reviews
• Debugging and benchmarking

Production
• Deployment strategies
• Monitoring in production

Once you grasp these, backend stops being “mysterious” and starts becoming systematic.

[gxjo @gxjo_dev]

Interviewer:

Indexes speed up queries.
Then why not index every column in a database?

[Akshay Shinde @ConsciousRide]

90% of Kubernetes / DevOps interviews in 2026 are just these 14 concepts repeated :

[pulkit mittal @pulkit_mittal_]

Interviewer:

DB Query time : 2 seconds.
After indexing : 50ms.

Same data.

So what was the database doing for 1.95 seconds earlier?

[Sajad | Laravel expert @sajad_lfc]

❤️

[Liverpool FC @LFC]

Ten years ago today, Jürgen was appointed Reds manager ❤️

A tremendous tenure 👏

[Taylor Otwell @taylorotwell]

@nullpointered I will bet you $500k right now this field will exist in 1.5 years 😅

[Sajad | Laravel expert @sajad_lfc]

@thelarrybarker You should clear cache too on any update related.

[Sajad | Laravel expert @sajad_lfc]

@Abmankendrick B

[Sajad | Laravel expert @sajad_lfc]

@Abmankendrick A - easier to add or subtract the quantity in one click.

[Harris Raftopoulos @harrisrafto]

Hey Laravel devs, here's a gem for you! 💎

Share data with all views using View::share! Make global data available across your entire application.

Perfect for system settings, user preferences, and common configuration values!

#Laravel

[Taylor Otwell @taylorotwell]

The database query builder now includes a "firstOrFail" method. 🚧

[Taylor Otwell @taylorotwell]

The new "Cache::flexible" method provides an implementation of the stale-while-revalidate pattern. It's so slick. Serve cached data while refreshing cache in the background using deferred functions. 🧠

https://t.co/bNsjJgZNWD

[Taylor Otwell @taylorotwell]

The defer() function allows you to defer functions until after the response has been sent back to the user, keeping your application feeling lightning quick. ⚡

https://t.co/cjci0xqmgs

[Fantasy Premier League @OfficialFPL]

Who else selected Dominic Solanke BEFORE his move to Spurs to make this bold move possible? 👏

Remember, if you find yourself in the same position, you won't be able to make another transfer until a Spurs player is removed...♟

#FPL

[Liverpool FC @LFC]

▶️⏺️──────── 0:00/2:54

Full-time feeling 🥹

[Sajad | Laravel expert @sajad_lfc]

@JamesPearceLFC @MarkCarey93 @CaoimheSport Matip

[Jordan Henderson @JHenderson]

Legend ❤️ @DivockOrigi