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DEV Community · Technology

Designing Functions That Compound: Small, Pure, and Composable

The Power of Compounding Functions When I first started writing code, I treated functions like isolated tasks: parse this input, format that output, save this record. Each function worked, but the codebase became a tangled mess of duplicated logic and hidden side effects. The turning poin...

Code Atlas 5 days ago

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DEV Community · Technology

Stop Wrapping OpenTelemetry: The Instrumentation Anti-Pattern

Do not wrap the OpenTelemetry API in your own helper class. It looks like good engineering hygiene, but a MetricsHelper.RecordLatency(name, value) facade throws away the performance model OTel is built on, hides the semantic conventions your backend relies on, and teaches your team an abstraction th...

DevOps Start 5 days ago

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DEV Community · Technology

The AI That Checks Its Own Work

Here's the failure mode nobody puts in the demo. You ask an AI agent to add a section to your homepage. It calls the API, writes the content, and reports back: "Done — I've added the pricing section." You take its word for it. Two days later a visitor emails to say half the page is blank, because a...

Martin 5 days ago

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DEV Community · Technology

I built a simplified microservice reference project with guide on how to run locally, using docker-compose or Kubernetes + deployment to AKS

Today I'm showcasing a project I've been working on for a while: Ledgerly, a simplified microservices reference project built with .NET and Angular. I built Ledgerly to be be focused purely on microservices best practices. What it demonstrates: 🔹 Database-per-service — 4 services, 4 independent...

amrali21 5 days ago

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DEV Community · Technology

What Developers Can Learn From Global Conversations About AI Ethics

Artificial intelligence is moving from experimental projects into everyday products. Developers are building AI-powered applications for education, healthcare, finance, communication, and countless other industries. But technical capability alone is not enough. As AI becomes more influential, deve...

Global education Leaders 5 days ago

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DEV Community · Technology

Emerging Tech - AR/VR, Blockchain and Beyond in Rugby

Today we turn to the newer, sometimes hyped technologies that are starting to appear around the game: augmented and virtual reality, blockchain experiments, digital collectibles and other emerging tools. The goal is not to chase every trend, but to separate what is genuinely useful from what is most...

Timothy Opango 5 days ago

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DEV Community · Technology

The docs said unnamed items get dropped. I ran the A/B and couldn't reproduce it

There is an open-source skill in a library I have been working through called image-fusion. It takes up to 8 separate product photos — a top, trousers, a coat, boots, a scarf, whatever — and composites all of them onto one model to produce a single complete-look e-commerce shot. Its documentation c...

xiaodong Zhang 5 days ago

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DEV Community · Technology

What is Redis? The Developer’s Secret Weapon for Lightning-Fast Apps

What is Redis? The Developer’s Secret Weapon for Lightning-Fast Apps If your database is the library where you store all your books, Redis is the desk right in front of you where you keep the one book you are reading right now. Redis (Remote Dictionary Server) is an in-memory data struc...

Time Pass 5 days ago

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DEV Community · Technology

Choosing the Right LINE Message UI: Confirm, Buttons, Quick Replies, Carousel, or Flex?

You are building a LINE customer flow and start with a confirm template. Then the requirements grow: Confirm Cancel Change address Contact support At this point, the problem is no longer “How can I add more buttons to a confirm template?” The real question is: Which LINE message type ma...

unifyport 5 days ago

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DEV Community · Technology

Building an Open-Source AI-Assisted International Job Search Platform

Building an Open-Source AI-Assisted International Job Search Platform Finding a job in another country is more complicated than searching for a job title. Candidates often need to understand: Whether the company supports visa sponsorship Whether the role matches their actual experience...

Subrata Kumar Das 5 days ago

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DEV Community · Technology

Why Your Self-Hosted Stirling-PDF Container OOMs, Hangs or Returns a Broken PDF: 15 Anti-Patterns and Their Fixes

Stirling-PDF is not an unstable application. Almost every crash, hang and quietly mangled output traces back to one of fifteen decisions you made outside the app: an unbounded container, the wrong image variant, a reverse proxy that gives up after 60 seconds, or an OCR call with no language pack beh...

John 5 days ago

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DEV Community · Technology

MCP vs. a Direct Database Connection: A Security and Workflow Comparison

Sooner or later, someone on your team wants to point an AI assistant at the production database. Maybe it's a support engineer who wants to answer "why is this customer's invoice stuck?" without writing SQL. Maybe it's you, wanting Claude or Cursor to draft a gnarly multi-join query against real tab...

Vivek Kumar 5 days ago

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DEV Community · Technology

Argo CD Canary Deployment: Gating Rollouts with Real SLIs

Originally published on kuryzhev.cloud The scenario Argo CD said the deploy was "Healthy" — it just meant the manifests applied, not that checkout stopped returning 500s. We pushed a checkout service change, CI passed, Argo CD synced clean, dashboard all green. Ninety seconds later, our alertin...

Oleksandr Kuryzhev 5 days ago

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DEV Community · Technology

Automating Webhook Testing in Your CI/CD Pipeline (GitHub Actions & GitLab CI)

API event testing CI/CD automated API testing pipeline automated integration testing webhooks automated payload testing automated webhook pipeline tests automated webhook runner automated webhook validation automate webhook testing CI/CD webhook automation CI/CD webhook mocking guide CI pipeline web...

InstaWebhook 5 days ago

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DEV Community · Technology

[Boost]

I Used React DataGrid to Build a Real Space Mission Explorer Puts a 100k-row space dataset to the test Hadil Ben Abdallah...

edwhuynh_htl 5 days ago

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DEV Community · Technology

We built an AI that asks before it acts. Here is the architecture.

Every tool I use added an AI feature this year. My notes app, my repo host, my payments dashboard, my email. Each one is genuinely useful inside its own four walls. And each one holds its own little pocket of context that never talks to the others. So here is what actually happens on a normal Tuesd...

Weio 5 days ago

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DEV Community · Technology

My First GitHub Project: From a Local Folder to GitHub Using Git and SSH

Before this week, "Git" and "GitHub" were basically the same word to me. Turns out they're not even close. Git is the thing that runs quietly on your own machine, tracking every change you make. GitHub is just where you choose to back that history up online. You can use Git your whole life and never...

Victoria 5 days ago

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DEV Community · Technology

Caso real: automaticé un medio de jazz con IA (agenda, fichas y SEO)

Caso real: automaticé un medio de jazz con IA (agenda, fichas y SEO) Hemos trabajado con varios medios de nicho en el pasado, y siempre nos hemos preguntado cómo mantener vivo un proyecto con un público reducido y una audiencia específica. En este caso, nos enfrentamos al desafío de autom...

Iván Jiménez Moreno 5 days ago

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DEV Community · Technology

AI Evals at a Glance: Heatmaps for Stakeholders

Visualizing AI evals with Inspect Viz Welcome back to our blog series on running, analyzing and visualizing AI evals. Last time we discussed how to design and run evals for analysis and visualization using inspect eval and inspect view. Many of these methods, such as rearranging the dashb...

Katie McLaughlin 5 days ago

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DEV Community · Technology

Mass Assignment in PHP and Laravel — When User Input Becomes More Than It Should

This is the sixteenth article in a series on PHP and Laravel application security. So far we have covered: Article 1: What your PHP logs actually look like during a SQL injection attack Article 2: Why URL encoding can break PHP security checks Article 3: The decode bomb problem — why unlimited...

Nchiminyi — Founder, Kriosa 5 days ago

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DEV Community · Technology

Free AI App Builder with Backend: FastAPI Microservice Guide

If you need a free AI app builder with backend to get a FastAPI microservice running today, you can do it with a handful of platforms that bundle hosting, a database, and auth for zero cost. The catch is that the free tiers have hard limits, and they expose the same failure modes you’ll hit in produ...

Ayush Kumar 5 days ago

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DEV Community · Technology

Every dev tool you paste your data into is a potential breach you didn't sign up for

This week another headline dropped: a threat actor is reportedly selling around 3.6 million employee records lifted from Microsoft Azure environments across multiple Fortune 500 companies. It's not an isolated story — breach-tracking groups are on pace to blow past last year's record for reported da...

Format stack 5 days ago

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DEV Community · Technology

Beyond the Agent Hype: Architecting Observability, Memory, and Guardrails for Production AI Systems

Originally published on tamiz.pro. The initial wave of the Generative AI boom was defined by the "Hello World" of agents: a simple script chaining an LLM to a few tools, hosted on a local notebook or a ephemeral cloud function. It worked. It was magical. And it collapsed the moment you tried to sca...

Tamiz Uddin 5 days ago

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DEV Community · Technology

What Is Software Development? A 2026 UK Guide

What is software development? At its simplest, software development is the process of designing, building, testing, and maintaining the programs that run on computers, phones, servers, and devices. It is how an idea becomes a working application. But that one-line definition hides a great deal, and...

Mecanik1337 5 days ago

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