Alex Zajac

Alex Zajac

Software Engineer II @Amazon Prev. Machine Learning @ Ecole Polytechnique System Design, WebDev and AI enthusiast

Weekly DigestWeekly Digest
🍔🧠 Bye Bye Passwords: How Grab Rebuilt Their Entire Auth System

🍔🧠 Bye Bye Passwords: How Grab Rebuilt Their Entire Auth System

PLUS: Top 10 Redis Use Cases 💾, 3 Tips for FAANG ⚡, Rust Parsing Simplified 🦀

Alex Zajac
Alex Zajac
Weekly DigestWeekly Digest
🍔🧠 RIP React; How Dagger Moved to Go + WebAssembly

🍔🧠 RIP React; How Dagger Moved to Go + WebAssembly

PLUS: Cameras in Airpods?! 🎧, Serverless 101 ⚡, Junion to Staff in 3 Years 🧓

Alex Zajac
Alex Zajac
Weekly DigestWeekly Digest
🍔🧠 How to Build a Real-Time Gaming Leaderboard That Scales

🍔🧠 How to Build a Real-Time Gaming Leaderboard That Scales

PLUS: Sonic-Fast Log Searches ⚡, LLMs for Staff Engineers 🤖, 25 Years Dev Insights 🧓

Alex Zajac
Alex Zajac
Weekly DigestWeekly Digest
🍔🧠 How YouTube Handles 2.5B Users: A System Design Breakdown

🍔🧠 How YouTube Handles 2.5B Users: A System Design Breakdown

PLUS: Chaos Engineering 101 🔥, How to Scale WebSockets ⚡, When to Use Query Builders? 🤔

Alex Zajac
Alex Zajac
Weekly DigestWeekly Digest
🍔🧠 How GitHub Handles 500 Million Code Push/Month

🍔🧠 How GitHub Handles 500 Million Code Push/Month

PLUS: 7 Lessons Building AI Apps 🤖, Double-Keyed Browser Caching ⚡, OpenAI's New Operator Agent 👀

Alex Zajac
Alex Zajac
Weekly DigestWeekly Digest
🍔🧠 GraphQL vs REST Explained In 1 Email

🍔🧠 GraphQL vs REST Explained In 1 Email

PLUS: Uber's Exabyte-Scale Data System 📚, React's New Animations API 🕸️, 15 Tips to Ace System Design 🏆

Alex Zajac
Alex Zajac
Weekly DigestWeekly Digest
🍔🧠 Real-time TB transfers at Pinterest

🍔🧠 Real-time TB transfers at Pinterest

PLUS: How AirTags Work ⚡, DDOS Mitigation 101 📚, Long Polling vs. WebSockets 💬

Alex Zajac
Alex Zajac
Weekly DigestWeekly Digest
🍔🧠 Behind the Scenes: Managing 90M Queries a Month at Canva

🍔🧠 Behind the Scenes: Managing 90M Queries a Month at Canva

PLUS: AI Predictions for 2025, 2024 Databases Summary 📚, Mastering Concurrency in Practice ⚡

Alex Zajac
Alex Zajac
Weekly DigestWeekly Digest
🍔🧠 Booking Just Made Java Sexy Again: 77% Smaller Payloads With 1 Migration

🍔🧠 Booking Just Made Java Sexy Again: 77% Smaller Payloads With 1 Migration

PLUS: System Design Interview Database Tips 📚, Apple vs Ring 👀, SQLite's Speed Boost with Bloom Filters ⚡

Alex Zajac
Alex Zajac
Weekly DigestWeekly Digest
🍔🧠 RIP Microservices; Shopify's 30TB/min Approach

🍔🧠 RIP Microservices; Shopify's 30TB/min Approach

PLUS: Leetcode Simplified 👀, Thread Management 101 📚, Debugging Techniques for Developers ⚡

Alex Zajac
Alex Zajac