Learning
Hub
Choose your path. Every lesson is free, comprehensive, and written by experts. Start learning in seconds â no account needed.
Choose Your Path
Pick a subject and start immediately. All courses are completely free.
Web Development
10+ Lessons
HTML, CSS, JavaScript, React, and Next.js â build real websites from scratch.
Python
260+ Lessons
From basics to advanced â data structures, OOP, decorators, async, and libraries.
Data Science
87 Lessons
NumPy, Pandas, matplotlib, scikit-learn, and deep learning fundamentals.
DS Premium
50 Lessons
Feature engineering, MLOps, transformers, causal inference, and real-world projects.
Data Engineering
55+ Lessons
Pipelines, Spark, Kafka, Airflow, Snowflake, dbt, and cloud platforms.
SQL
70+ Lessons
SELECT to advanced window functions, CTEs, indexing, and query optimization.
Machine Learning
85 Lessons
Regression, classification, clustering, neural networks, and MLOps.
Deep Learning
55 Lessons
Backpropagation, CNNs, RNNs, attention, transformers, GANs, and diffusion models.
LLM
155 Lessons
Transformer architecture, tokenization, fine-tuning, LoRA, RAG, RLHF, agents, and production systems.
Generative AI
100 Lessons
Transformers, diffusion models, RAG, agents, prompt engineering, fine-tuning, and production GenAI systems.
AI Agents
50 Lessons
Autonomous AI agents with tool use, planning, memory, multi-agent systems, and real-world deployment.
Quantum Computing
50 Lessons
Qubits, quantum gates, circuits, Shor's algorithm, Grover's search, error correction, and quantum hardware.
Healthcare AI
50 Lessons
Medical imaging, clinical decision support, drug discovery, genomics, and AI-powered patient care.
Fintech
50 Lessons
Algorithmic trading, payment systems, digital banking, blockchain finance, and risk modeling.
Climate Modeling
50 Lessons
Atmospheric physics, GCMs, Earth system models, carbon cycles, and climate policy analysis.
Sustainable Tech
50 Lessons
Renewable energy, carbon capture, circular economy, green building, and environmental innovation.
Computer Vision
50 Lessons
CNNs, object detection, segmentation, GANs, NeRF, depth estimation, pose estimation, and 3D vision.
System Design
120 Lessons
Scalability, distributed systems, databases, caching, load balancing, and real-world system design problems.
Statistics
400+ Lessons
Probability, distributions, hypothesis testing, Bayesian methods, and regression.
Engineering Math
100 Lessons
Linear algebra, calculus, probability, statistics, optimization, and advanced topics.
R Programming
75+ Lessons
Data manipulation, ggplot2, dplyr, tidyr, statistical modeling, and R Markdown.
PySpark
40+ Lessons
SparkSession, DataFrames, Spark SQL, Structured Streaming, and production patterns.
Apache Kafka
5+ Lessons
Distributed event streaming, topics, producers, consumers, Streams, and Connect.
Apache Airflow
30 Lessons
Workflow orchestration, DAGs, operators, sensors, executors, and scheduling.
dbt
30 Lessons
Data transformation, models, tests, Jinja templating, materializations, and docs.
Snowflake
50 Lessons
Cloud data platform, architecture, time travel, streams, tasks, and Snowpark.
React JS
5 Lessons
Components, hooks, router, state management, and performance optimization.
Next.js
4 Lessons
App Router, server components, data fetching, API routes, and deployment.
Node.js
4 Lessons
Runtime environment, Express.js, databases, authentication, and API development.
Cybersecurity
60 Lessons
Comprehensive cybersecurity from fundamentals to advanced. Network security, cryptography, forensics, and incident response.
Blockchain
20 Lessons
Blockchain fundamentals, cryptocurrency, smart contracts, DeFi, NFTs, DAOs, and Web3 development.
NLP
75 Lessons
Natural Language Processing â tokenization, embeddings, transformers, BERT, GPT, sentiment analysis, and production NLP systems.
AIOps & LLMOps
50 Lessons
AIOps and LLMOps â model monitoring, LLMOps pipelines, RAGops, vector databases, AI infrastructure, and MLOps.
ML Interview Questions
20 Lessons
Top-tier ML interview questions from Google, NVIDIA, Amazon, Meta, OpenAI, and Anthropic with detailed answers.
DL Interview Questions
20 Lessons
Premium DL interview questions from OpenAI, Google, NVIDIA, Meta, Anthropic, and DeepMind with detailed answers.
DS Interview Questions
20 Lessons
Premium DS interview questions from Google, Amazon, Meta, Netflix, Uber, and Apple with detailed answers.
Data Scientist Role
20 Lessons
Role-based DS interview questions from Google, Meta, Amazon, Netflix. Metrics design, A/B testing, product sense.
SQL Interview Questions
20 Lessons
Premium SQL interview questions from Google, Amazon, Meta, Netflix, Uber. Window functions, CTEs, optimization, indexing.
PySpark Interview Questions
20 Lessons
Premium PySpark interview questions from Google, Amazon, Meta, Netflix. SparkSession, DataFrames, optimization, streaming.
Airflow Interview Questions
20 Lessons
Premium Apache Airflow interview questions from Netflix, Amazon, Google, Uber. DAGs, operators, scheduling, Kubernetes.
Snowflake Interview Questions
20 Lessons
Premium Snowflake interview questions from Amazon, Google, Netflix, Uber. Architecture, warehouses, time travel, performance.
AWS Data Engineering
65 Lessons
Master AWS Data Engineering â S3, Glue, Redshift, EMR, Kinesis, Lambda, Step Functions. Service overview, architecture diagrams, pipelines, 200+ interview Q&A.
GCP Data Engineering
65 Lessons
Master GCP Data Engineering â BigQuery, Dataflow, Dataproc, Pub/Sub, Cloud Composer. Service overview, architecture diagrams, pipelines, 200+ interview Q&A.
Azure Data Engineering
65 Lessons
Master Azure Data Engineering â Synapse, ADF, Databricks, Event Hubs, Stream Analytics. Service overview, architecture diagrams, pipelines, 200+ interview Q&A.
DE Interview Q&A
40 Lessons
40 deep-dive Data Engineering interview questions â data modeling, Kafka, Spark, Airflow, streaming, data lakes, architecture. Asked at Google, Amazon, Meta.
DE Cloud Projects
10 Lessons
10 production-grade DE projects â real-time pipelines, data lakehouses, CDC, feature stores, data mesh. Complete code, Terraform, cost analysis.
AI/ML Projects
10 Lessons
10 production AI/ML projects â RAG pipelines, LLM fine-tuning, recommendation systems, computer vision, MLOps. PyTorch, Docker, Kubernetes, MLflow.
ML System Design
10 Lessons
10 ML system design interview questions â recommendation systems, fraud detection, search ranking, ad CTR, content moderation. Full architecture & scale analysis.
Cloud Architecture
20 Lessons
20 cloud design patterns â serverless, microservices, event-driven, CQRS, Kubernetes, API gateway, service mesh, disaster recovery.
Kafka Interview Q&A
15 Lessons
15 deep-dive Kafka interview questions â partitioning, replication, exactly-once, Streams, Connect, Schema Registry. Asked at LinkedIn, Uber, Netflix.
Spark Interview Q&A
15 Lessons
15 deep-dive Spark interview questions â architecture, memory, shuffle, streaming, Delta Lake, ML pipelines. Asked at Databricks, Netflix, Uber.
Python Interview Q&A
20 Lessons
20 deep-dive Python interview questions â data structures, OOP, generators, decorators, async, design patterns. Asked at Google, Meta, Amazon.
Advanced SQL Q&A
20 Lessons
20 advanced SQL lessons â recursive CTEs, PIVOT, JSON processing, gap-island, indexing strategies, query optimization. Asked at Google, Amazon, Meta.
MLOps Pipeline Q&A
15 Lessons
15 deep-dive MLOps questions â experiment tracking, model registry, CI/CD for ML, monitoring, A/B testing, model serving. Asked at Google, Meta, Netflix.
Advertisement
Why Learn Here?
Everything you need, completely free.
100% Free
Every lesson, always. No hidden paywalls ever.
Instant Access
No signup, no login. Click and learn immediately.
Expert Content
Written by working engineers and researchers.
Connected Topics
Lessons link into coherent learning paths.
Not Sure Where to Start?
New to tech? Follow this path:
Advertisement