Open now100+ engineers shipped real apps from this program • 65+ hours • 13 modules
Build Systems for Millions. Pass Top Company Interviews.
From zero backend experience to senior-level skills.
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Price
Format
65+ hours recorded - watch anytime
Modules
13
Language
Arabic
Take the first lesson free - right now
See the teaching level for yourself - then keep going.
Click to watch the free preview
Who teaches it
Abdullah Hatem
Founder & President of Catalyst · ex-Senior Engineer @ Breadfast
Ex-Breadfast, Vodafone, Lasting Dynamics (Italy/Spain). Built systems handling millions of requests. Interviewed & hired engineers.
See more on LinkedIn ↗What you'll master
The things that separate you from everyone else.
Scalable Systems
Think like Uber, Careem, Instapay - not like university projects.
- Systems handling millions of requests
- Know when your system will fail - before it does
- Design it right from day one
The difference is architecture & system design.
Interview Mastery
We don't make you memorize questions. We teach you to THINK.
- System Design Interviews
- "Why" questions - explain your decisions
- Speak with confidence, not hesitation
+ Real Mock Interview with Eng. Abdullah (same style as top companies)
Any Language, Same Thinking
We don't tie you to one language. Here's why:
- Top companies don't hire "Java devs"
- They hire engineers who can THINK
- Languages change. Thinking doesn't.
Google, Meta, Amazon - this is how they hire.
Is this for you?
Who is this for?
- University students (CS, Engineering)
- Junior & Mid-level developers
- Self-taught devs with gaps in fundamentals
- Anyone who wants to build systems for millions
Only prerequisite: Solid knowledge of ANY programming language. No backend experience needed.
After this program, you'll:
- Design systems that handle millions of users
- Explain trade-offs confidently in interviews
- Debug & optimize production systems
- Negotiate higher salaries with proof of skill
What it solves
- Your app works locally. But what happens with 10,000 concurrent users? 1 million?
- You can build CRUD. But can you design systems that don't crash under pressure?
- Can you explain trade-offs? SQL vs NoSQL? Monolith vs Microservices? Cache invalidation?
- Do you know WHY your code works - or just HOW to write it?
Curriculum
13 modules
- - How backend interviews work (Jr/Mid)
- - What hiring managers really test
- - The backend roadmap you'll follow
- - HTTP, REST, status codes
- - API design (good vs bad endpoints)
- - Auth: session/JWT/refresh
- - MVC, service layers, clean architecture
- - Background jobs & queues
- - Logging/monitoring/error handling
- - Caching basics (client/server/DB)
- - Code quality: clean functions, SOLID (light)
- - SQL vs NoSQL - when to use each
- - Indexes with diagrams
- - Query optimization basics
- - Migrations & schema evolution
- - Transactions, isolation levels
- - Common DB bottlenecks & debugging
- - Big O mental model
- - Arrays & Hash Tables
- - Stacks & Queues
- - BFS/DFS for logic questions
- - Sorting basics
- - Two-pointer / sliding window
- - Backend-style DSA (maps, grouping, aggregations, parsing, caching logic)
- - Threads vs processes
- - Deadlocks with examples
- - Mutex/semaphore/race conditions
- - Critical sections
- - Scheduling
- - Memory (heap/stack)
- - TCP vs UDP
- - DNS
- - Load balancers
- - Reverse proxy
- - Rate limiting
- - WebSockets vs HTTP polling
- - Software Architecture: Monolith vs Microservices
- - Sync vs Async backend communication
- - Event-driven architecture
- - Storage systems: Databases, Object Storage, CDN, Caching
- - Message queues & Pub/Sub patterns
- - DB Sharding & Partitioning strategies
- - Vertical Scaling vs Horizontal Scaling
- - Single AZ vs Multi-AZ availability zones
- - BOTE (Back of the Envelope) calculations
- - Caching deep dive (app/DB/CDN/invalidation)
- - Rate limiting & throttling
- - Resilience: Circuit Breaker, Exponential Backoff, Retry, Timeout
- - SAGA (orchestration vs choreography)
- - Idempotency & Feature flags
- - System Design first: requirements, constraints, BOTE calculations
- - DB schema design & API contracts
- - Microservices architecture with async & sync communication
- - PostgreSQL + Redis + NoSQL integration
- - Payment system implementation
- - Location optimization with PostGIS/GiST indexes
- - Background jobs & worker queues
- - Multi-region system across multiple countries
- - Caching strategies with Redis
- - Unit & integration tests
- - Clean Git workflow & CI/CD
- - Full deployment pipeline
- - Unit testing basics
- - Integration vs E2E
- - Mocking & stubs
- - How seniors do code reviews
- - Git workflow
- - Avoiding messy code
- - Mid-level best practices
- - Docker & Docker Compose
- - CI/CD with GitHub Actions
- - Environments (dev/staging/prod)
- - AWS: EC2, S3, CloudFront CDN
- - AWS: RDS, NoSQL (DynamoDB), ElastiCache (Redis)
- - Auto Scaling & Load Balancing
- - VPC & networking fundamentals
- - ECS container orchestration
- - Benchmark & performance testing
- - Technical screening questions
- - 40-50 backend Q&A
- - How to structure answers
- - Homework project to show
- - Junior mock interview
- - Mid-level mock interview
- - What was good vs bad
- - Rewrite the best answers
- - CV templates
- - How to talk about your experience
- - Salary expectations (Egypt → Gulf → Remote)
- - How to negotiate without fear
- - HR/Recruiter screening scripts
Technologies you'll learn
Don't know them? Perfect. We teach everything.
JavaScriptTypeScriptJavaGolangPostgreSQLMongoDBRedisRabbitMQPub/SubDockerGitHub ActionsAWS
What you'll build
Full Real Backend Project that absorbed 150 MILLION REQUESTS
Real production project
How it's delivered
- Format
- 65+ hours recorded - watch anytime
- Live sessions
- Weekly live Q&A sessions
- Support
- Private community + WhatsApp support
- Recorded hours
- 65 hours
- Access
- Lifetime access
- Language
- Arabic
The offer
- 65+ recorded hours across 13 modules - fundamentals to System Design
- A real 1-on-1 mock interview with Eng. Abdullah - top-company style, real feedback
- Weekly live Q&A - you're never stuck alone
- Full module on CVs, salaries & negotiation (Egypt → Gulf → Remote)
- Lifetime access, private community & WhatsApp support group
Buying two programs together takes 20% off both - three takes 25%. See the programs
Take 30 full days. Watch every module if you want to. Not for you? One WhatsApp message and every pound comes back - no questions, no forms.
- 1 · Pay through the InstaPay link
- 2 · Screenshot the receipt
- 3 · Send it on WhatsApp - access activates within minutes
💳 Pay with Visa · Mastercard · InstaPay or any e-wallet
Questions
No! You only need solid knowledge of ANY programming language. We teach backend from zero to senior level.
Watch at your pace, rewind complex topics, no interruptions. Plus weekly LIVE sessions for questions.
When ready, book 1-on-1 with Abdullah. Same style as Google/Meta interviews. Real feedback.
Perfect! Google, Meta, Amazon don't hire 'Java devs' - they hire engineers who think. We help you adapt.
YouTube gives you scattered lessons - no path, no production project, no one reviewing you. This is one map from zero to System Design, a real project that handled 150M requests, and a mock interview with an engineer who has actually hired. The difference isn't the information - it's the order and the follow-through.
Nobody can guarantee you a job - and anyone who does is lying to you. What we do guarantee: the level of thinking interviews actually test, a real project for your CV, and a full module on applying and negotiating.
One WhatsApp message within 30 days - full refund.
After 65 hours you'll walk into any interview knowing exactly what to say - and why.
Start today, with a 30-day money-back guarantee.
Still have questions?
Talk to our team before enrolling. Serious inquiries only.