Discover

D

DEV Community · Technology

How I built FastMedia Downloader: A microservices architecture with FastAPI, Next.js, and Docker

Hey devs! 👋 I recently built and open-sourced FastMedia Downloader, a full-stack platform designed to inspect and extract multimedia content from over 1,000 supported platforms (YouTube, TikTok, Instagram Reels, X/Twitter, SoundCloud, and more). I wanted to share how I structured the project, t...

Camilo Llamas 4 days ago

Read

D

DEV Community · Technology

Linux Security Checklist for Production Servers

A step-by-step practical guide to locking down SSH, configuring firewalls, enforcing least privilege, hardening the kernel, and setting up audit trails on your production systems. The moment you spin up a fresh virtual machine on AWS, DigitalOcean, Hetzner, or a bare-metal server in a datacenter,...

Asep Sayyad 4 days ago

Read

D

DEV Community · Technology

Understanding Git Workflow

I have recently found myself learning Git as part of my Data Science upskilling journey. I consider it as a means to do configurations on your local machine with version control to track changes and managing projects. I worked on a project that had me set up a folder, add new files and upload to Gi...

johnpaul gitonga 4 days ago

Read

D

DEV Community · Technology

The enum value that had never been written

I found 27 workflow branches that were being skipped while every run still finished as COMPLETED. The condition on those branches could never match. So the step was skipped, the run was marked success, and nothing ever told me. They had been running like that for weeks. That is the part worth sitt...

Aghassi Sargsyan 4 days ago

Read

D

DEV Community · Technology

Why editing one word in a PDF is so much harder than it looks

I spent the last few months building a PDF editor. The feature that sounded easiest — change a word, leave everything else alone — turned out to be the one that ate most of the time. Here is what I learned, mostly by getting it wrong. A PDF does not contain sentences The first assumption to give up...

Vikram Bhattacharjee 4 days ago

Read

D

DEV Community · Technology

MySQL Will Quietly Eat Your Data If You Let It: Truncation, Charsets, and the 1366 You Never See

A WhatsApp button on a shop was dialling the wrong number. Not a formatting problem — a genuinely different number, three digits short of the one in the admin panel. The admin panel had saved it. The page was reading it. Nothing errored. The column was varchar(10), the number arrived with a country...

Mahmut Gündüzalp 4 days ago

Read

D

DEV Community · Technology

I built a tool to catch MCP contract drift then found out someone else built almost the same thing

A few months ago I decided I wanted to build something in the MCP ecosystem. It's growing fast, it's early, and I figured if I picked the right problem within it, it'd be worth the bet. I didn't have a specific painful bug of my own to fix. So instead of guessing, I went looking for evidence real G...

Rojan Khadka 4 days ago

Read

D

DEV Community · Technology

How to Check a Palindrome in Python

A palindrome is a word, number, or sentence that reads the same forward and backward. For example: madam → madam level → level 121 → 121 racecar → racecar In this blog, we will learn how to check whether a word is a palindrome using Python. Python Program word = input("En...

Adhi sankar 4 days ago

Read

D

DEV Community · Technology

Iskor Devlog #1 - Learning a Little Bit of Everything

Introduction Frontend Studied the common signs of a vibecoded website and avoided it. Backend Used Spring Boot and learned SOLID principles. Authentication Implemented Clerk Sign-in and Sign-up page using their components. Docker and CI/CD Learned Docker before this and for this week, how to use...

Jedric Tuquero 4 days ago

Read

D

DEV Community · Technology

Test-Driven Development: My Jedi Training

The Quest Begins (The "Why") I still remember the first time I tried to add a feature to a legacy codebase and ended up spending an entire afternoon chasing a bug that felt like a mischievous gremlin hiding in every corner of the file. I’d written the function, run the app, saw something...

Timevolt 4 days ago

Read

D

DEV Community · Technology

Stop writing the same custom HTTP wrapper in every project

Every time I start a new frontend or full-stack project, the same ritual happens. We install axios or grab native fetch, and within a few weeks, we find ourselves building a massive layer of custom wrappers, interceptors, and helpers around it. Why? Because out-of-the-box HTTP clients handle basic...

Sovan Kandar 4 days ago

Read

D

DEV Community · Technology

The HTTP 429 That Turned Seven Minutes Into Zero Work

This is a submission for DEV's Summer Bug Smash: Smash Stories powered by Sentry. ARGUS is a data-catalog governance swarm. Its agents use structured model calls to draft descriptions, classify sensitive fields, and review repairs before anything can be written. During a 45-entity sweep, the syste...

Joshua Hernandez 4 days ago

Read

D

DEV Community · Technology

When a Safety Reviewer Rejected Everything and Still Passed Its Test

This is a submission for DEV's Summer Bug Smash: Smash Stories powered by Sentry. ARGUS is a data-catalog governance swarm. Specialist agents find missing descriptions, untagged sensitive columns, broken lineage assumptions, and other metadata defects. An Arbiter reviews each proposed repair before...

Joshua Hernandez 4 days ago

Read

D

DEV Community · Technology

# Stopping S3 Data Exfiltration in Real Time: A Step-by-Step Incident Response

The Scenario An EC2 instance with an attached IAM role has s3:GetObject on a bucket containing sensitive data. An attacker compromises the instance, extracts temporary credentials from the metadata service, and begins bulk-downloading objects. GuardDuty fires Exfiltration:S3/AnomalousBeha...

Danh Hoang Hieu Nghi 4 days ago

Read

D

DEV Community · Technology

How to Add a Human Review Gate to an n8n Lead Intake Workflow

Most lead intake automations work on the happy path. A form arrives, the workflow sends an email, and the lead appears in a CRM. The expensive failures happen at the edges: the same webhook is delivered twice a required field is missing a high-risk message is routed automatically an API accepts t...

Joshua Hernandez 4 days ago

Read

D

DEV Community · Technology

My First week in data Engineering:Setting Up My tools

This marked the beginning on an exiting journy .I started exploring Data Engineering. My firt focus was tool getting familiar with the required tools.I started setting up and exploring Dev.t,DBEaver,Aiven,git hub and git bash,Visual sudio. One of the most exiting part is that i even successfully u...

calvince okoth 4 days ago

Read

D

DEV Community · Technology

How to Use a LinkedIn CV generator and What transfers to a Resume

How to Convert Your LinkedIn Profile into an ATS-Friendly Resume A LinkedIn CV generator can give you a draft, but a LinkedIn profile does not transfer cleanly into a resume. LinkedIn's PDF export can truncate sections, cannot be edited or tailored, and is not built for ATS parsing. The...

Illeana Vowies 4 days ago

Read

D

DEV Community · Technology

Same Zone, Same Projection, 427 Metres Apart

I was writing a blog post about the architecture of a system I built when I found a bug in it. This is that bug, and the much more interesting thing standing behind it. The system ingests mobile mapping surveys — LiDAR trajectories with spherical photos along them, driven along roads. The files arr...

Srdjan Popovic 4 days ago

Read

D

DEV Community · Technology

# My First Week Learning Git

This week, I was introduced to Git and GitHub as part of my Data Science learning journey. At first, I found Git a little confusing. There were several commands to learn, and I wasn't sure how they all fitted together. After practising, I started to understand that Git is mainly about keeping trac...

Zena Muhoro 4 days ago

Read

D

DEV Community · Technology

What 166K Clicks Taught Me About Using AI for SEO

Over three months, my static website generated 166K Google clicks from 1.39M impressions, with an 11.9% CTR and 7.5 average position. The graph also shows traffic declining after its peak. That is important: AI did not create automatic, permanent growth. What helped was using AI inside a measurable...

Mofidul Islam 4 days ago

Read

D

DEV Community · Technology

From MKDIR to GIT PUSH: What Actually Happens to a Project?

The first time you see a Git workflow, it can look like a list of commands you are supposed to memorize: git add. git commit -m "Initial commit" git push Three commands, and somehow the project ends up on GitHub. But what actually happens between creating a folder on your computer and seei...

Esther Njihia 4 days ago

Read

D

DEV Community · Technology

MCP Security: Threat Model & Hardening Guide (2026)

Educational & Ethical Use Only — This article is provided for educational and ethical cybersecurity research purposes only. The techniques described should only be used on systems you own or have explicit permission to test. The Model Context Protocol has become the default way AI applications...

Prabhu Kalyan Samal 4 days ago

Read

D

DEV Community · Technology

Seedance 2.5 Prompting: A Practical Guide to Better AI Videos

Writing a good Seedance 2.5 prompt is less about adding more adjectives and more about giving the model a clear sequence of instructions. For example: A woman drinking coffee in Paris, cinematic. It sounds fine, but a video model still has to decide what happens next. Does she pick up the...

jeanine huang 4 days ago

Read

D

DEV Community · Technology

One version bump, 40 files to edit. Import maps fix that.

grep -rl "esm.sh/lodash-es@4.17.21" src/ came back with forty-one files. Forty-one places where the same CDN URL, pinned to the same version, was typed out by hand at the top of a module. The security advisory said bump to 4.17.22. A sed one-liner across the repo felt fine until it silently skipped...

Parsa Jiravand 4 days ago

Read