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How To Design A Good API and Why it Matters

56 videos recommended on HN
YouTube
12 HN users recommended this talk12 months2011–2025 score 13.5
Years with an HN recommendation, 2007–2026

HN repeatedly names it the best resource on API design, a staple answer to any 'how do I design an API' question.

Joshua Bloch's Google Tech Talk on how to design good APIs and why it matters, with concrete principles and examples. It treats every programmer as an occasional API designer.

“Absolutely far and away the best resource that I found was this Google TechTalk by Joshua Bloch” (HN, 2012)

3 strong recommendations · 10 recommendations · 1 citations · Talks · intermediate

14 Hacker News comments

From the HN archive; up to 20 kept per video, favoring different commenters. Recommendations first.

@socratic Oct 2011 Strongly recommends
on HN thread How to Rock a Systems Design Interview
Obviously, this is marketing rather than a serious treatment of the topic. It seems to basically say: "in order to design a system, you should have a regular undergraduate Computer Science education" which seems maybe like a prerequisite (and maybe informative about their hiring process) but not very useful. However, for what it's worth, the two best resources I've seen for systems design are: Hints for Computer System Design: [link] How to Design a Good API: [this video] What else should be in this bibliography?
One of the best resources on systems design
@philbo Mar 2012 Strongly recommends
on HN thread API Design is UI for Developers
I'm building a public API in my current job and, a few weeks ago, I was scouting around for the good API design advice. Absolutely far and away the best resource that I found was this Google TechTalk by Joshua Bloch: [this video] If you're interested in the topic and haven't seen it yet, I urge you to do so ASAP.
Best API design advice found by the commenter
@minzak Aug 2025 Strongly recommends
on HN thread Everything I know about good API design
Nice article. I'd also highly recommend "How To Design A Good API and Why it Matters" video from Joshua Bloch (co-author of Java). He digs much deeper, mostly at code level rather than JSON level but the same principles apply. Even though this video is almost 20 years old, the topics are as significant today as they were back then. [this video]
Deeper code-level API design principles that still apply
@rjhackin Apr 2011 Recommends
on HN thread Ask HN: What makes a good API presentation?
Joshua Bloch gave a good presentation on API design, you might have seen this before. Here is the link - [this video] Mostly along those lines will make a presentation useful and interesting. Not sure whats the time limit for your presentation but real life example would keep the audience more interactive or building something on the fly from ground up.
Joshua Bloch's presentation on API design
@d_r Aug 2011 Recommends
on HN thread Ask HN: API design practices
Not specifically about web service APIs, but you might enjoy this talk by Joshua Bloch [1]: "How To Design A Good API and Why it Matters": [this video] [1] [link]
Joshua Bloch's talk on designing good APIs
@stiff Apr 2013 Recommends
on HN thread Ask HN: What's the best technical talk you've heard?
Single best is difficult, here are some favourites of mine: "You and your research" by Richard Hamming: [link] "How to design a good API and why it matters" by Joschua Bloch: [this video] Google TechTalk on Git by Linus Torvalds: [link] All talks ever given by Alan Kay, for example: [link]
Favorite technical talk on API design
@mockindignant Oct 2014 Recommends
on HN thread Ask HN: What makes an API good?
I highly recommend this ~hour long talk given by Josh Bloch a few years ago, it is quite good and gives plenty of concrete examples: [this video]
Hour-long talk with concrete examples of good API design
@paulkoer Oct 2014 Recommends
on HN thread Ask HN: What makes an API good?
I highly recommend the following talk by Joshua Bloch: "How to design a good API and why it mattes" [1]. Key points: - When in doubt, leave it out - you can never remove things from an API but always add to it. - Write several clients of the API to get a good feel how its used. Three is usually enough, one is not. [1] [this video]
Key API design principles from Bloch
@0xmohit Oct 2016 Recommends
on HN thread Ask HN: What's your favorite tech talk?
How To Design A Good API and Why it Matters [0] The Principles of Clean Architecture [1] The State of the Art in Microservices by Adrian Cockcroft [2] "The Mess We're In" by Joe Armstrong [3] [0] [this video] [1] [link] [2] [link] [3] [link]
Listed among favorite tech talks
@watwut Jan 2018 Recommends
on HN thread Good learning material – JAVA, Spring
Read more
a.) On java - one hour talk but good: * How To Design A Good API and Why it Matters [this video] b.) General code structure - dont to read it cover to cover unless you like to, you will die of boredom, but definitely have a look in library. It will help you to think about code structure right way. * Refactoring: Improving the Design of Existing Code * Code Complete c.) Object Oriented Programming * Design Patterns: Elements of Reusable Object-Oriented The three books I recommended are older, but not much changed in basics of object oriented programming. They are well readable. I would also recommend to read something on functional programming, mostly so that you see another approach too and thus wont go too far with object design where it does not suits. d.) 8.) I read awesome book on estimations, I really really hope it is this one: * Software Estimation: Demystifying the Black Art tldr: There is difference between negotiation and estimation, make sure you know which you are doing. Split it into smaller tasks and then estimate minimum, maximum and most likely. Then calculate (min+4*likely+max)/6. Surprisingly, it works and is faster then do one estimate. It is also more precise then anything else I tried. I really hope I shown you right book. e.) On Spring and rest, I would recommend to read documentation and write own code. I don't recall a book that would blow my mind, so I guess any will do. f.) For general "latest tech" learning, I like [link] site. There are mostly techie te
Hour-long talk on API design, good for Java learners

Citations, criticism and jokes

Video list and Hacker News comment labels from HackerTube (prompted by @karpathy), released under ODC-By 1.0, built on the open-index/hacker-news archive. Hacker News data is provided by Y Combinator; comments remain the work of their authors. Video titles, channel names and thumbnails belong to their creators and are shown via YouTube. HackerTube Watch is an unofficial edition. Data export of 2026-10-31.

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