Senior Software Engineer - React

A free newsletter of short, focused posts on system design and problem solving, from the team behind the Grokking courses. Recent posts cover company interview processes (such as OpenAI and Anthropic roles), the most asked mobile system design questions and preparation plans, each linking to a fuller article on the blog. It suits engineers who want a steady, low-effort way to keep system design and interview topics fresh between deeper study sessions.

• System design
• DSA

The second volume of Grokking the System Design Interview, aimed at senior and staff (L5/L6) design rounds. It works through harder case studies such as a payment system, flash sale, notification service, unique ID generator, Gmail, Reddit, Google Calendar and a code judging system, then goes beneath them with patterns like quorum, write-ahead logs and vector clocks and deep dives into Dynamo, Cassandra, Kafka, Chubby, HDFS, GFS and BigTable.

• System design
• Backend
• Job search

A browsable practice library of coding problems that can be filtered by pattern, data structure, difficulty and company, so you can drill exactly the weakness you found this week. Patterns include two pointers, sliding window, hash maps, stacks, backtracking and greedy algorithms, with company filters for Google, Meta, Microsoft, Amazon, Oracle and LinkedIn. Free to browse, with an in-browser editor and solutions.

• Job search
• DSA

A course built around 75 coding interview questions chosen for coverage across 18 topic areas, from arrays and sliding window to graphs, backtracking, dynamic programming and tries. Each question has a step-by-step algorithm, a walkthrough and complexity analysis, with solutions in six languages. It suits candidates with a few weeks before an interview who need a balanced, finite problem set rather than an endless list.

• Job search
• DSA

A seven-stage plan from how the web works to a shipped product: HTML and CSS, JavaScript and the browser, Git and build tooling, your framework (React with Next.js, Vue with Nuxt, or Angular), TypeScript and testing, performance, accessibility and security, then a real product with real users. It suits beginners, career switchers and backend developers filling in the browser side. By the end you can ship a typed, tested, accessible and fast app, deployed with CI and real people using it.

• Web
• Frontend
• Programming
• Testing

Over two thousand free programming tutorials, organised into tidy multi-part crash courses: modern JavaScript, Node.js, React, Vue, Firebase, MongoDB, Laravel, React Native, Flutter, testing, Git and, more recently, AI coding tools. Each series builds one thing step by step in short episodes. It suits beginners and developers who want a structured, bite-sized introduction to a new tool.

• Web
• Programming
• Frontend
• Backend