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Engineering Insights & Guides

The best problem-solving writing in software engineering — databases, performance, security, frontend and distributed systems, in one feed.

11,841 articles
Languages — 2025 Recap: so many projects

2025 Recap: so many projects

I’ve been working on so many projects in 2025, I thought it was important for me to make a recap, if only just to clear my head. There are many, many, many things to go through and we don’t have a sponsor today, so I’m gonna start right away with facet! facet facet is a project that I started working on in March of this year — that’s right, it’s only been ten months, yet it feels like an eternity.

AWAmos WengerAmos Wenger·December 31, 2025Languages
Engineering — Quick Hit #77

Quick Hit #77

:near(<length>) has been proposed, which would match whenever the pointer is within a specified proximity of the element.

DSDaniel SchwarzDaniel Schwarz·December 29, 2025Engineering
Security — Stopping the slow death of internal tools

Stopping the slow death of internal tools

Internal tools often decay due to high maintenance costs and security tradeoffs. Learn how Vercel uses v0 to build secure, sustainable custom software that business teams can ship and maintain without pulling engineers off the roadmap.

VVercel·December 27, 2025Security
Engineering — Quick Hit #75

Quick Hit #75

Safari 26.2 ships command and commandfor as well as hidden=until-found, which are now supported in all web browsers.

DSDaniel SchwarzDaniel Schwarz·December 24, 2025Engineering
Frontend — Thank You (2025 Edition)

Thank You (2025 Edition)

This is the best job I've had in my life and it's only possible because you keep showing up each day to read, learn, share, and discuss all-things-front-end (and a little CSS, of course) with us.

GGGeoff GrahamGeoff Graham·December 23, 2025Frontend
Networking — How Workers powers our internal maintenance scheduling pipeline

How Workers powers our internal maintenance scheduling pipeline

Physical data center maintenance is risky on a global network. We built a maintenance scheduler on Workers to safely plan disruptive operations, while solving scaling challenges by viewing the state of our infrastructure through a graph interface on top of multiple data sources and metrics pipelines.

KDKevin Deems, Michael HoffmannKevin Deems, Michael Hoffmann·December 22, 2025Networking
Engineering — Quick Hit #74

Quick Hit #74

Safari 26.2 ships sibling-index(), sibling-count(), and field-sizing, bringing them close to baseline.

DSDaniel SchwarzDaniel Schwarz·December 22, 2025Engineering
Career & Teams — This year’s most influential open source projects

This year’s most influential open source projects

From Appwrite to Zulip, Universe 2025’s Open Source Zone was stacked with standout projects showing just how far open source can go. Meet the maintainers—and if you want to join them in 2026, you can now apply for next year’s cohort.

LRLee ReillyLee Reilly·December 22, 2025Career & Teams
Career & Teams — Python Typing Survey 2025: Code Quality and Flexibility As Top Reasons for Typing Adoption

Python Typing Survey 2025: Code Quality and Flexibility As Top Reasons for Typing Adoption

The 2025 Typed Python Survey, conducted by contributors from JetBrains, Meta, and the broader Python typing community, offers a comprehensive look at the current state of Python’s type system and developer tooling. With 1,241 responses (a 15% increase from last year), the survey captures the evolving sentiment, challenges, and opportunities around Python typing in the […]

CWChris Wiltz·December 22, 2025Career & Teams
AI & ML — AI SDK 6

AI SDK 6

Introducing agents, tool execution approval, DevTools, full MCP support, reranking, image editing, and more.

VVercel·December 22, 2025AI & ML
SRE & Ops — DrP: Meta’s Root Cause Analysis Platform at Scale

DrP: Meta’s Root Cause Analysis Platform at Scale

Incident investigation can be a daunting task in today’s digital landscape, where large-scale systems comprise numerous interconnected components and dependencies DrP is a root cause analysis (RCA) platform, designed by Meta, to programmatically automate the investigation process, significantly reducing the mean time to resolve (MTTR) for incidents and alleviating on-call toil Today, DrP is used [

CWChris Wiltz·December 19, 2025SRE & Ops