Luciano Mammino 📙 Node.js Design Patterns
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Luciano Mammino 📙 Node.js Design Patterns
@loige.co
2K followers 860 following 870 posts
AWS Serverless Hero & MVP. Senior Architect fourTheorem, author of 📕 http://nodejsdp.link & ✉️ http://fstack.link Node.js, JavaScript, Rust 🦀 & Cloud ☁️
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Node.js friends, quick heads up! 👋

Today (13 Nov 2025) I am doing a live AMA with Mario Casciaro, hosted by Packt, all about Node.js Design Patterns (4th edition) and how Node.js has evolved over the years.

#nodejs #javascript #ama
November 13, 2025 at 9:44 AM
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Here’s a story I didn’t expect to write 👇🧵 (1/8)

A few days ago I went down a rabbit hole to see what people search most about Node.js. Guess what? “how to read and write files” is near the top.
Cover art for “Reading and Writing Files in Node.js,” featuring a cartoon version of Luciano. On the left, he’s writing on paper with a pen; on the right, he’s reading a newspaper with a focused expression. The illustration visually represents the concepts of writing and reading files in Node.js.
October 13, 2025 at 1:33 PM
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🎉 Author copies are in! 📚

Holding the 4th edition of “Node.js Design Patterns” never gets old. Months of work turned into something I can touch, and hopefully a guide to help you level up with Node.js.
October 7, 2025 at 5:16 PM
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🎁 OK I PROMISED YOU A GIFT....

Our favorite chapter is FREE!

Chapter 6: Coding with Streams.

80 pages to help you write faster, leaner, more scalable Node.js code and learn one of the most important abstraction in all Node.js!
Top-down view of an open book held by two hands on a white table, showing Chapter 6 titled “Coding with Streams” from Node.js Design Patterns by Luciano Mammino and Mario Casciaro; cozy gray sweaters and clean layout emphasize the chapter intro text.
September 25, 2025 at 6:56 AM
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🎉 Big news and a gift for you 🎁

Keep reading🧵👇
Close-up of a person in a black leather jacket holding the 4th edition of “Node.js Design Patterns” by Packt, featuring a black cover with a purple wave graphic and small author headshots (Luciano Mammino and Mario Casciaro), against a light brick background.
September 25, 2025 at 6:56 AM
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Marketing & Engineering: best friends or eternal struggle? 🤝⚔️

It’s the classic tug-of-war: marketing owns messaging & pages, devs own the stack. How much control do we actually give? 🤔

🧵👇
Podcast cover image for AWS Bites. At center, a silver headless mannequin in a yellow T-shirt reading ‘Headless CMS Club.’ Above it, the Strapi logo with the title ‘Headless CMS for Serverless projects.’ On the left, co-host Eoin (grey hoodie) looks up and smiles; on the right, co-host Luciano (black T-shirt) faces the camera. The scene is a bright, minimalist room with wooden floor and potted plants, suggesting a casual studio vibe.
September 19, 2025 at 8:17 AM
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Stuck keeping #Spring apps alive on #EC2 or herding #Kubernetes just to ship a few endpoints? ⚙️

What if #Java on #AWS #Lambda could hit your latency targets and cut the ops tax too? ⏱️💸
Podcast thumbnail: steampunk café with two top-hatted men, the host on the left (Luciano Mammino) and the guest on the right (Mark Sailes), drinking Java coffee amid brass machinery; a glowing moka pot with a Java logo on the table; white steam clouds; title text “Java & Lambda” overhead.
September 5, 2025 at 8:08 AM
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Love big launches? So do we 🎉

Brand new AWS Bites episode is out 🎙️

Did #AWS just build an IDE to rival your editor? Yes. Meet #Kiro.
Podcast cover for AWS Bites. A cartoon ghost parody of the Kiro logo sticks its tongue out and flashes rock signs in the center. The title reads “Coding with Kiro,” with “Vibe” crossed out and “Spec” added. Bottom left, one host in a blue hoodie with folded arms. Bottom right, the other host in a gray hoodie holding a MacBook and grinning. Dark alley background with a street lamp.
August 22, 2025 at 8:29 AM
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🚨 TIL you can use another MacBook as a wireless extended display. Not just an iPad with Sidecar 🤯
I always thought this was iPad-only, but it works great between Macs too! 💻➕💻
A desk setup showing four connected screens displaying a retro pixel-style wallpaper with design tool icons. The screens include two MacBooks, an external monitor, and an iPad, demonstrating the use of multiple Apple devices as extended displays in a creative workspace.
August 7, 2025 at 12:53 PM
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🧼🐚 Time for some shell spring cleaning?

This Fish shell snippet lists all executable files in your $PATH — handy if you're trying to remember that neat CLI tool you installed months ago... or spot something suspicious 👀
A picture of a terminal with the following fish shell code: for dir in (string split : $PATH) if test -d $dir find $dir -type f -perm +111 2>/dev/null end end | sort | uniq
August 6, 2025 at 4:53 PM
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🚀 New AWS Bites episode!

We tried Amazon #DSQL so you don’t have to (but you might want to) 👀

Luciano and Eoin put Aurora DSQL through its paces in #AWS Bites #Podcast Episode 145

🧵 Here’s what we found:
Cartoon-style illustration of Eoin (left) and Luciano (right) from the AWS Bites Podcast reacting with surprise and excitement. Eoin has his hands raised and mouth open, while Luciano points toward a glowing database icon in the center. The title above reads “First look at AMAZON DSQL” in playful lettering.
June 27, 2025 at 11:18 AM
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How do you hash… a banana? 🍌🤔

I spent 20 minutes trying to figure out why hashing "banana" with SHA-1 in Node.js gave me a different result than doing it in the terminal.

A classic case of “invisible bytes”! Let me walk you through it 🧵
A comic-style image illustrating a debugging moment about SHA-1 hashing. The top panel shows Node.js v24.0.2 with a code snippet that hashes the string "banana" using crypto.createHash('sha1'), resulting in the hash 250e77f12a5ab6972a0895d290c4792f0a326ea8. The middle panel shows a confused cartoon character and a terminal command echo "banana" | sha1 producing a different hash: 8a1aaf746ada2a80fab03a58c91575ffe82885ac. The bottom panel shows the same character now smiling and pointing upwards, next to the corrected command echo -n "banana" | sha1, which returns the same hash as Node.js. The image highlights that the echo command adds a newline character unless -n is used.
June 14, 2025 at 4:03 PM
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And of course... I had to do a big update on my favorite chapter ❤️

Streams!

This time, we went all in to make this topic easier to grasp and apply, even if you’ve struggled with it before.

We want to make Streams FINALLY accessible to everyone.
June 2, 2025 at 9:26 AM
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🧪 Testing!

Almost 100 pages covering strategies, tools, and examples to help you write bulletproof Node.js applications.

We cover everything from unit tests to integration, mocking, code coverage, and more.
June 2, 2025 at 9:26 AM
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📘 The new edition of Node.js Design Patterns is coming soon!

After 9 months of hard work with Mario Casciaro, we're finally ready to share what’s next for one of the most loved Node.js books.

But this is not “just another edition”...
Cover of the book "Node.js Design Patterns, Fourth Edition" by Luciano Mammino and Mario Casciaro. The design features a dark background with a dynamic purple and blue wave pattern. At the top, there is a label saying "Expert Insight" and a hexagon badge that reads "Early Access." The subtitle reads: "Level up your Node.js skills and design production-grade applications using proven techniques." At the bottom, there are black-and-white photos of the authors and the publisher logo "<packt>".
June 2, 2025 at 9:26 AM
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My friendship with #ChatGPT is built on mutual trust 💖, deep respect 🫱🫲, and me yelling “NO EM–DASHES” every 2 messages 😤

It nods, says “Got it!” 🤖
Then casually drops another one or two... like nothing happened 🙃

I guess there are too many em-dashes ended up in the training data...
May 28, 2025 at 6:19 PM
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🚢 Migrating a containerized app (#Rust backend + #Solidjs frontend) from on-prem to AWS?

We wanted to simplify things. So instead of the usual VPC + ALB + Fargate setup, we tried App Runner.

Did it deliver? Here's what we learned 👇🧵

#AWS #AppRunner #Fargate
A humorous race scene in a forest path, showing a group of runners mid-stride. The runners' faces have been replaced with logos or meme faces representing AWS services and podcast hosts. Bold yellow-green text at the top asks: “Is App Runner Better Than Fargate?” The image playfully suggests a competition between AWS App Runner and Fargate, with an energetic and slightly chaotic vibe.
May 9, 2025 at 9:29 AM
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Blessed to have so many awesome people in my circle ❤️
@jameseastham.co.uk @calavera.dev @lirantal.com @marc.ba @emilyliu.me @ranthebuilder.cloud @syntax.fm @luca.lanziani.com @fourtheorem.bsky.social @darko.rup12.net
May 5, 2025 at 9:25 AM
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console.log() is probably the first function I ever used in Node.js...

And yet, I was today years old when I learned it supports format strings! 🤯

🧵👇
A dark-themed terminal screenshot showing Node.js v23.11.0 and a console.log() call with a format string. The command console.log('Event: %j', {foo: 'bar'}) is displayed, with a yellow arrow pointing to the resulting JSON string {"foo":"bar"}. A label below reads 'JSON.stringify(...)' to explain the %j placeholder behavior.
May 5, 2025 at 9:20 AM
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I doubt this is going to last... #ChatGPT, somehow, really loves hyphens! 😮‍💨
May 3, 2025 at 5:55 PM
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It's never too late for a good @atuin.sh WRAPPED! 🎁
April 8, 2025 at 10:59 AM
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🚨 Think copying files between S3 buckets is easy?
Well… yes—until it's not.

We recently hit some walls and ended up building our own open-source tool: s3-migrate 🧵
April 4, 2025 at 9:45 AM
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Positively surprised to see ChatGPT recommending @fastify.dev rather than Express... and for good reasons too!

🐆
April 3, 2025 at 11:30 AM
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🚀 "Wait, JSONata can do WHAT with AWS Step Functions?!"

If you use #AWS Step Functions (or want to), these 2 new features—JSONata + Variables—will save you time, money, and sanity.

Let’s break it down ⤵️
March 21, 2025 at 11:46 AM
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Just released a tiny open-source utility! 🎉

🔗 s3-migrate → github.com/lmammino/s3-migrate

Need to copy an entire S3 bucket between accounts or migrate to an S3-compatible service (Cloudflare R2, anyone?!)—give it a try! 🚀

Feedback & contributions welcome! 💬 #AWS #S3 #opensource
March 10, 2025 at 12:57 PM