
How WhatsApp Handles 100 Billion Messages a Day
The engineering story behind the world's most-used messaging app.
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22 posts in this category

The engineering story behind the world's most-used messaging app.

At hundreds of thousands of queries per second, the conventional stateless microservice model exposes fundamental throughput ceilings. This post examines how Uber confronted that reality and the architectural decisions, tooling, and eventual rewrite that followed.

Your blockchain wallet is already being stolen. You just don't know it yet. Quantum computers aren't science fiction anymore. And the attack on your transactions already started years ago.

Climate simulations, failing nodes, 6 petabytes of data, and the algorithms quietly holding it all together.

Spiking neural networks, event-driven chips, and memristive computing are here and they're rewriting the rules of what's possible at the edge.

Edge AI is reshaping how and where computation happens — moving inference off the cloud and onto the devices we carry, wear, and live with. This is what it means, why it matters, and how it's quietly taking over everything.

Amazon didn't just invest in Anthropic. It bought the right to be the ground Anthropic runs on, for the next decade. Here's what that actually means.

Discover the future of wireless technology with 6G. This technical deep dive explores IMT-2030, terahertz spectrum, AI-native networks, Integrated Sensing and Communication (ISAC), Reconfigurable Intelligent Surfaces (RIS), and sustainability impacts. Learn about 6G performance targets, real-world benefits, major engineering challenges, and the expected 2030 rollout.

Agentic AI’s CPU & Memory Explosion: The Next Big Tailwind for Semiconductor Stocks

AI isn’t just changing tools. It’s creating a flywheel where execution decides which companies lead and which fall behind.

Exploring how Node.js and FastAPI event loops manage asynchronous concurrency.

A deep dive into Git’s internal architecture. Understand the system behind the commands.

The history of software is abstraction. MCP is the next leap: the USB-C for AI

Easy Understanding of GPT

The article is a beginner-friendly introduction to Git (the version control system), explaining its basics, why it's essential

Dive into the world of Docker containers: discover what they are, why they outperform traditional VMs, how they package and run applications consistently anywhere, and why Docker has become the go-to tool for modern, portable, and efficient software deployment.

Explore Spotify's robust event-driven architecture, powered by Apache Kafka and microservices, delivering seamless streaming, personalized recommendations, and superior audio quality in this in-depth case study.

Uber's real-time architecture: microservices, geospatial S2 indexing, Kafka streaming, low-latency matching, surge pricing AI, and global-scale dispatch

Explore Netflix's innovative streaming architecture in this detailed case study, uncovering how distributed networks like Open Connect CDN eliminate latency for seamless global video delivery.

A rigorous, no-nonsense deep dive into how independent machines coordinate, scale, stay consistent, and survive failure while pretending to be one coherent system.

Clean Architecture by Uncle Bob isn't about trendy tech—it's a timeless fight against software decay

Frameworks grew complex, slow, and mentally expensive. Smart runtimes like Bun and Deno are flipping the stack - making tooling invisible, performance native, and development boring again.