Learn to build Backend APIs
Hands-on, interactive tutorials you can start right now — no login required. Read the lessons, write code in the browser, and run it instantly. Subscribe to save your progress and earn XP.
Ship Cloud & DevOps like a pro
Containers, orchestration, infrastructure as code, and CI/CD — deploy production systems with Docker, Kubernetes, Terraform, and GitHub Actions.
Build AI-Powered Apps
Machine learning, MLOps, agentic AI, prompt engineering, and LLM apps — from dataset to deployed model.
Design Systems That Scale
System design, clean architecture, DDD, event-driven patterns, and observability — build software that grows with your users.
Databases Course
One end-to-end databases journey: SQL, PostgreSQL, NoSQL, Redis, and vector databases.
SQL
Relational database fundamentals: SELECT, INSERT, UPDATE, JOINs, indexes, normalization, and performance.
PostgreSQL
Master PostgreSQL: schema design, indexes, advanced queries, transactions, and performance tuning.
Redis
In-memory data structures: caching, pub/sub, streams, persistence, and high-availability patterns.
NoSQL
NoSQL database models: document, key-value, column-family, and graph databases.
Software Quality Course
One end-to-end quality journey: QA fundamentals and TDD — testing, automation, and CI quality gates.
QA Engineering
Software testing end-to-end: test planning, manual + automated testing, bug tracking, and CI quality gates.
Testing & TDD
Write reliable code with pytest: assertions, fixtures, parametrization, and red-green-refactor.
Git Course
One end-to-end Git journey: fundamentals to pro workflows — branching, rebase, and team collaboration.
Git
Track changes and collaborate: commits, branches, merges, remotes, and conflict resolution.
Git Pro Workflow
Master interactive rebase, cherry-pick, bisect, and trunk-based CI with protected branches.
AI Course
One end-to-end AI journey: machine learning, MLOps, agentic AI, prompt engineering, and LLM applications.
Machine Learning
Build ML models: regression, classification, feature engineering, model evaluation, and deployment.
MLOps
Operationalize ML: pipelines, model registry, monitoring, drift detection, and CI/CD for models.
Agentic AI Agents
Build autonomous agents with LLM prompting, tool-calling, memory, and LangGraph.
Prompt Engineering
Zero/few-shot prompting, chain-of-thought, RAG prompting, and defenses against prompt injection.
LLM App Development
Embeddings, vector DBs, similarity search, and retrieval-augmented generation pipelines.
Backend Course
One end-to-end backend journey: REST APIs, FastAPI async, JWT auth, PostgreSQL, GraphQL, gRPC, message queues, WebSockets, API gateways, sagas, circuit breakers, OAuth2, and OWASP security.
Java Spring Boot
Complete Java backend path: language fundamentals to Spring Boot — JPA/Hibernate, Spring Security JWT, validation, and Flyway migrations.
Go Gin/Fiber
Complete Go backend path: language fundamentals to Gin/Fiber — routing, middleware, sqlx/SQLite, and graceful shutdown.
Rust Axum/Actix
Complete Rust backend path: language fundamentals to Axum/Actix — ownership, serde, sqlx, and error handling.
C# ASP.NET Core
Complete C# backend path: language fundamentals to ASP.NET Core — EF Core, JWT Bearer auth, and FluentValidation.
Python FastAPI
Complete Python backend path: FastAPI async routes, Pydantic validation, dependency injection, SQLAlchemy, WebSockets, and production APIs.
JavaScript, TypeScript & Node.js
Complete JavaScript backend path: language fundamentals, TypeScript, Node.js modules, file system, events, and streams.
Cloud Course
One end-to-end cloud journey: AWS fundamentals to production — EC2, S3, Lambda, RDS, IAM, VPC, and cost management.
AWS
Master Amazon Web Services: compute, storage, serverless, networking, security, and infrastructure as code.
Azure
Master Microsoft Azure: CLI, virtual machines, storage, virtual networks, Entra ID, App Service, Cosmos DB, and AKS.
Google Cloud
Learn Google Cloud Platform: gcloud, Compute Engine, Cloud Storage, VPC, IAM, Cloud Run, BigQuery, and GKE.
Serverless
Build event-driven apps with Lambda, API Gateway, queues, Step Functions, and cloud functions — without managing servers.
Cybersecurity Course
One end-to-end security journey: fundamentals, network security, encryption, pentesting, and DevSecOps.
Cyber Security
Security fundamentals, network security, authentication, encryption, and penetration testing.
DevSecOps
Secure the software lifecycle: threat modeling, SAST/DAST, secrets management, and compliance.
Data Course
One end-to-end data journey: analytics, BI, and SQL foundations — pipelines, warehouses, and dashboards.
Data Analyst
Analyze data end-to-end: SQL queries, data cleaning, visualization, and insight reporting.
BI Analyst
Build business intelligence: data modeling, dashboards, KPIs, and reporting for decision-making.
DevOps Course
One end-to-end DevOps journey: CI/CD, containers, orchestration, infrastructure as code, and deployment pipelines.
Docker
Package and ship applications with images, Dockerfiles, and docker-compose for reproducible deployments.
Kubernetes
Orchestrate containers with kubectl, Pods, Deployments, Services, and rolling updates.
Terraform
Infrastructure as code with HCL, providers, modules, remote backends, and workspaces.
GitHub Actions
Automate build, test, and deploy pipelines with GitHub Actions workflows.
Linux
Master the Linux command line: files, processes, permissions, shell scripting, and system administration.
Frontend Course
One end-to-end frontend journey: HTML, CSS, JavaScript, React, and modern web UI development.
Frontend
Build modern web UIs: HTML, CSS, JavaScript, responsive design, and frontend tooling.
Fullstack
Build complete applications: frontend + backend + databases + deployment, end-to-end.
Messaging Course
One end-to-end messaging journey: RabbitMQ and Kafka — queues, topics, streams, and event-driven systems.
RabbitMQ
Message brokers: exchanges, queues, bindings, routing, reliability, and dead-letter queues.
Kafka
Distributed streaming: topics, partitions, producers, consumers, exactly-once, and stream processing.
Mobile Course
One end-to-end mobile journey: Android and iOS — UI, state, networking, and app stores.
Android
Build Android apps: Kotlin, activities, layouts, RecyclerView, Room, and app architecture.
iOS
Build iOS apps: Swift, SwiftUI, navigation, networking, persistence, and app store deployment.
Python
Learn Python syntax: variables, data types, control flow, functions, modules, OOP, error handling, and file operations.
JavaScript Essentials
JavaScript language basics: variables, types, functions, arrow functions, arrays, and array methods with map/filter/reduce.
Go Advanced
Go concurrency with goroutines and channels, worker pools, table-driven tests, benchmarks, and httptest integration testing.
C++
Modern C++ from fundamentals to RAII, STL containers and algorithms, pointers and smart pointers, lambdas, and file I/O.
PHP
PHP from syntax to production: arrays, functions, OOP, forms and validation, PDO prepared statements, and MySQL.
Ruby
Idiomatic Ruby: blocks and methods, arrays and hashes, classes, symbols and regex, and file I/O with error handling.
Dart
Dart for Flutter and beyond: collections, functions, classes, async with Futures and streams, and null safety.
Software Architecture Course
One end-to-end architecture journey: system design, C4 model & ADRs, clean architecture, DDD, CQRS, event-driven, microservices patterns, API design, scalability, distributed systems, and architecture documentation.
Software Architect
Design large-scale systems with the C4 model, ADRs, microservices, CQRS, event-driven architecture, API design, and scalability patterns.
Clean Architecture & DDD
Model complex domains with Domain-Driven Design and clean layers: entities, value objects, aggregates, bounded contexts, repositories, and dependency inversion.
Microservices Patterns
Production patterns for distributed services: saga orchestration, circuit breakers, event-driven flows, and webhook integrations with DLQ.
System Design Course
One end-to-end system design journey: caching, load balancing, sharding & CAP, event-driven architecture, message brokers, API gateways, service mesh, and observability.
System Design
Design scalable systems: caching strategies, load balancing, horizontal scaling, sharding, and the CAP theorem.
Event-Driven Architecture
Decouple services with message brokers (Kafka, RabbitMQ), event sourcing, and event-driven flows.
API Gateways & Service Mesh
Route, rate-limit, and observe traffic with reverse proxies, API gateways, and service mesh.
Observability
Master metrics, tracing, and logging with Prometheus and Grafana.