I’m a backend software engineer from Ukraine. I’ve been building web applications since 2009, working with companies big and small, as well as independently.
Learn how the event loop enables Node.js to handle thousands of concurrent connections on a single thread.
Time zones, Date object, formatting, and storing dates in MySQL, PostgreSQL, DynamoDB, and MongoDB.
Set up TypeORM with Express.js and PostgreSQL: entities, migrations, relationships, and query builder.
Execution environments, cold starts, burst scaling, and a load test showing how Lambda handles concurrent requests.
Step-by-step guide to creating a CloudWatch billing alarm that notifies you when AWS charges exceed a threshold.
Reuse property types from other types using indexed access types, keyof, and generics in TypeScript.
What --skipLibCheck actually does, how it affects type checking of .d.ts files, and when to enable it.
Set up a Serverless Framework project with TypeScript, deploy Lambda functions to AWS, and understand what happens behind the scenes.
How Lambda works, its pricing model, and a hands-on example of creating a function behind API Gateway.
Redux fundamentals with React: store, actions, reducers, async thunks, and migrating to Redux Toolkit.
Configure TypeScript with Express, set up a dev workflow with Nodemon, and deploy to Heroku.
How the pipe operator works and a practical example of chaining commands together.
Use Perl one-liners to search, replace, count, and edit files line by line from the terminal.
What stdin, stdout, and stderr are, and how to redirect them using file descriptors.
Sharpen your skills with a quick quiz.