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Changelog

Track all the latest content additions and updates to Hello Interview. We continuously add new system design breakdowns, deep dives, and learning materials.

September 7 - 13, 2026

6 updates

New Content

Anthropic Engineering Manager Interview Guide (2026)

Sep 13, 2026 by Evan King | Content

Anthropic Software Engineer Interview Guide (2026)

Sep 7, 2026 by Evan King | Content

Anthropic Senior Software Engineer Interview Guide (2026)

Sep 7, 2026 by Evan King | Content

Anthropic Staff Software Engineer Interview Guide (2026)

Sep 7, 2026 by Evan King | Content

Updated Content

OpenAI L4 Interview Guides & Questions (2026)

Sep 7, 2026 | Content

OpenAI L5 Interview Guides & Questions (2026)

Sep 7, 2026 | Content

August 31 - September 6, 2026

2 updates

New Content

Design a Flash Sale System

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Sep 4, 2026 by Evan King | System Design

New Videos

Handling Large Blobs Pattern for System Design Interviews

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Sep 4, 2026 by Evan King | System Design

August 17 - 23, 2026

2 updates

New Content

Change Data Capture in System Design Interviews

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Aug 17, 2026 by Evan King | Deep Dive

New Videos

Design ChatGPT

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Aug 22, 2026 by Evan King | System Design

August 10 - 16, 2026

1 updates

New Videos

Dealing with Contention Pattern for System Design Interviews

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Aug 10, 2026 by Evan King | System Design

July 27 - August 2, 2026

3 updates

New Content

Design a Notification System

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Jul 28, 2026 by Evan King | System Design

How Figma Built Multiplayer Editing on Simplified CRDTs

Jul 28, 2026 by Evan King | In the Wild

How Spotify Serves Point Queries from an Exabyte Data Lake

Jul 28, 2026 by Stefan Mai | In the Wild

July 13 - 19, 2026

4 updates

New Content

How Slack Put Kafka in Front of Its Redis Job Queue

Jul 17, 2026 by Evan King | In the Wild

How Discord Moved Trillions of Messages to ScyllaDB

Jul 16, 2026 by Evan King | In the Wild

Answering AI Questions

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Jul 16, 2026 by Austen McDonald | Behavioral

How Shopify Moved Inventory Reservations from Redis to MySQL

Jul 14, 2026 by Evan King | In the Wild

July 6 - 12, 2026

1 updates

New Videos

Multi-step Processes Pattern for System Design Interviews

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Jul 10, 2026 by Stefan Mai | System Design

June 29 - July 5, 2026

1 updates

New Content

Design an Online Chess Platform

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Jun 29, 2026 by Evan King | System Design

June 22 - 28, 2026

1 updates

New Content

Proximity Search in System Design Interviews

Jun 23, 2026 by Evan King | Deep Dive

June 15 - 21, 2026

1 updates

New Videos

How to scale writes in your system design interview

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Jun 17, 2026 by Stefan Mai | System Design

June 8 - 14, 2026

2 updates

Updated Content

Multi-step Processes Pattern for System Design Interviews

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Saga pattern and durable execution mechanics overhaul, simplified tooling guidance, and clarity edits based on reader feedback.Jun 11, 2026 by Stefan Mai | System Design

Redis Deep Dive for System Design Interviews

Edits for clarity and correctness, distributed locks overhaul, and expanded sections based on reader feedback.Jun 11, 2026 by Stefan Mai | Deep Dive

June 1 - 7, 2026

1 updates

Updated Content

Dealing with Contention Pattern for System Design Interviews

Premium

Rewrote the pattern around closing the read-modify-write gap, walking up from conditional writes through pessimistic locking, optimistic concurrency, SERIALIZABLE isolation (now covering write skew), and distributed locks as out-of-database leases for reservations. Moved distributed transactions (2PC and sagas) out to the Multi-step Processes pattern so this one stays focused on coordinating access to a single source of truth.Jun 5, 2026 by Evan King | System Design

May 25 - 31, 2026

5 updates

New Videos

Graphs Overview

May 25, 2026 by Shivam Chauhan | Content

Graphs Overview

May 25, 2026 by Shivam Chauhan | Content

Can Attend Meetings

May 25, 2026 by Shivam Chauhan | Content

Kth Largest Element in an Array

May 25, 2026 by Shivam Chauhan | Content

Course Schedule II

May 25, 2026 by Shivam Chauhan | Content

May 18 - 24, 2026

11 updates

New Content

Design ChatGPT

Premium

May 21, 2026 by Evan King | System Design

Common Patterns in AI Coding Interviews