Changelog
Track all the latest content additions and updates to Hello Interview. We continuously add new system design breakdowns, deep dives, and learning materials.
July 13 - 19, 2026
4 updatesNew Content
Jul 17, 2026 by Evan King | In the Wild
Jul 16, 2026 by Evan King | In the Wild
Answering AI Questions
Premium
Jul 14, 2026 by Evan King | In the Wild
July 6 - 12, 2026
1 updatesNew Videos
Jul 10, 2026 by Stefan Mai | System Design
June 29 - July 5, 2026
1 updatesNew Content
Jun 29, 2026 by Evan King | System Design
June 22 - 28, 2026
1 updatesNew Content
Jun 23, 2026 by Evan King | Deep Dive
June 15 - 21, 2026
1 updatesNew Videos
Jun 17, 2026 by Stefan Mai | System Design
June 8 - 14, 2026
2 updatesUpdated Content
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
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 updatesUpdated Content
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 updatesNew Videos
May 25, 2026 by Shivam Chauhan | Content
May 25, 2026 by Shivam Chauhan | Content
May 25, 2026 by Shivam Chauhan | Content
May 25, 2026 by Shivam Chauhan | Content
May 25, 2026 by Shivam Chauhan | Content
May 18 - 24, 2026
11 updatesNew Content
Design ChatGPT
Premium
May 21, 2026 by Stefan Mai | Content
May 21, 2026 by Stefan Mai | Content
May 21, 2026 by Stefan Mai | Content
May 21, 2026 by Stefan Mai | Content
May 21, 2026 by Stefan Mai | Content
May 21, 2026 by Shivam Chauhan | Content
May 21, 2026 by Stefan Mai | Content
May 21, 2026 by Stefan Mai | Content
New Videos
May 24, 2026 by Shivam Chauhan | Content
May 21, 2026 by Shivam Chauhan | Content
May 11 - 17, 2026
10 updatesNew Content
May 14, 2026 by Stefan Mai | ML System Design
New Videos
May 15, 2026 by Shivam Chauhan | Content
May 15, 2026 by Shivam Chauhan | Content
May 14, 2026 by Shivam Chauhan | Content
May 14, 2026 by Shivam Chauhan | Content
May 13, 2026 by Shivam Chauhan | Content
May 13, 2026 by Shivam Chauhan | Content
May 12, 2026 by Shivam Chauhan | Content
May 12, 2026 by Shivam Chauhan | Content
May 11, 2026 by Shivam Chauhan | Content
May 4 - 10, 2026
6 updatesNew Content
May 8, 2026 by Evan King | Content
New Videos
May 10, 2026 by Shivam Chauhan | Content
May 10, 2026 by Shivam Chauhan | Content
May 6, 2026 by Shivam Chauhan | Content
May 5, 2026 by Shivam Chauhan | Content
May 4, 2026 by Shivam Chauhan | Content
April 27 - May 3, 2026
4 updatesNew Videos
May 3, 2026 by Shivam Chauhan | Content
Apr 30, 2026 by Shivam Chauhan | Content
Apr 29, 2026 by Shivam Chauhan | Content
Apr 29, 2026 by Shivam Chauhan | Content
April 20 - 26, 2026
1 updatesNew Content
Apr 24, 2026 by Stefan Mai | ML System Design
April 6 - 12, 2026
4 updatesNew Videos
Apr 12, 2026 by Shivam Chauhan | Content
Apr 9, 2026 by Shivam Chauhan | Content
Apr 9, 2026 by Shivam Chauhan | Content
Apr 9, 2026 by Shivam Chauhan | Content
March 23 - 29, 2026
4 updatesNew Content
Mar 23, 2026 by Evan King | Blog
New Videos
Mar 26, 2026 by Shivam Chauhan | Content
Mar 24, 2026 by Shivam Chauhan | Content
Mar 23, 2026 by Shivam Chauhan | Content
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