Master Coding Skills &
System Design.

Master Python asyncio — coroutines, async/await, asyncio.gather for concurrency, create_task, cancellation, and aiohttp for async HTTP.

Master Python dataclasses — auto-generated init/repr/eq, frozen immutable instances, slots for memory efficiency, and attrs for advanced validation.

Definitively understand interfaces vs abstract classes in PHP — contracts vs implementation, multiple vs single inheritance, decision framework.

Design clean REST APIs — resource naming, correct HTTP methods and status codes, URL versioning, cursor and offset pagination, consistent error responses.

Start TypeScript from scratch — type annotations, union types, interfaces, generics with constraints, and type narrowing with typeof/instanceof.

Master Python OOP — class inheritance, super(), method overriding, polymorphism, and dunder methods for operator overloading and protocol support.

Understand database sharding — vertical vs horizontal partitioning, shard key selection, consistent hashing, hot shards, and resharding.

Learn PHP 8 match expression — strict comparison without break, returning values, multiple arms, and when to use match vs switch.

Compare RabbitMQ and Kafka — push vs pull delivery, message replay, throughput, and code examples in Python for both producers and consumers.