EzLang - a small systems language I built in a month with AI
Repo: https://github.com/ZYF93/EzLang I spent the last month building a small programming language called EzLang. It is an expression-oriented systems…
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New developer from Morocco 👋 looking to learn and grow
Hey Dev.to 👋 I’m Anass, a graphic designer from Morocco who recently got into software development. I’ve been learning by building real projects and e…
Why PDF generation breaks in production (and why localhost lies)
PDF generation is one of those things that works perfectly… until real users touch it. On localhost: npm run dev Open Chrome → print → PDF. Done. Then…
The Thread Battle: Go Concurrency vs. Node.js Event Loop from First Principles
When building high-concurrency backend services, two ecosystems dominate the conversation: Node.js and Go (Golang). If you ask the internet how they h…
Stop Writing Boilerplate API Responses: Meet BaR-js
We've all been there: you’re building an endpoint, and for the hundredth time, you’re typing out res.status(200).json({ success: true, data: ... }) . …
Encrypt your .env with AWS KMS: Secrets that never touch process.env
A year ago I'd have told you a .env file was fine. Then we patched a CVSS 10.0 RCE in Next.js ( CVE-2025-66478 ) and spent the next two days rotating …
Building Adal: predictable webhook delivery without black boxes
Hi DEV community, I'm Yuriy, a fullstack developer and DevOps engineer with 10+ years of experience. I'm currently building Adal — a webhook delivery …
Before You Write a Single Line: How to Plan Your API Like a Senior Engineer
In my second week at work, I watched a senior engineer spend 3 days refactoring an API that took 1 day to build. The endpoint worked. The logic was co…
A practical SQL query tuning playbook: execution plans, joins, indexes, and the traps
SQL tuning is the process of making a database query run faster and cheaper — cutting response time while minimizing the system resources it burns. He…
I Built a MongoDB Migration Tool After One Bad Deploy
A few months ago I shipped a bad MongoDB migration. Classic mistake. I had run 3 migrations. The third one had a bug. I only wanted to rollback that m…
FastAPI for AI Engineers - Part 3: Connecting to a database
In the previous article, we explored how to build our first CRUD API using FastAPI. While our API worked correctly, there was one major problem. We we…
200 Accounts: Wiring the Fediverse Registration Coordinator to Disk
200 accounts is the floor I set for this Fediverse expansion. The coordinator to reach it was already built. Nothing wired it to disk. That is the mos…
How My Team from Risevest Academy Built an End-to-End Encrypted Messaging App in 3 Weeks
This project was Victor's brainchild, and it came a a result of our mentor asking each of us to come up with ideas to bring to reality. Victor's is th…
Web Security Is Everyone's Job: A Developer's Field Guide
Security is not a feature you bolt on after launch. It is not the CISO's problem alone. It is not a checklist you run through before a compliance audi…
From a Simple Auth Service to a Distributed Authentication Platform with Kafka, Debezium, and Observability
This is a submission for the GitHub Finish-Up-A-Thon Challenge What I Built I built a Distributed Authentication System as a long-term learning projec…
Session Management, Rate Limiting & Caching using Redis
Modern distributed systems — whether fintech APIs, e-commerce platforms, or AI-powered services — share a fundamental challenge: every replica, micros…
How I bypassed Vercel Serverless timeouts to build a decoupled document ingestion pipeline
If you’ve ever tried to build an asynchronous document processing or RAG pipeline using Next.js API routes hosted on Vercel, you know that even with m…
Backend Basics for Frontend Engineers: Dive into SQL and APIs with Node.js
If you've spent most of your career building beautiful UIs, managing state, and wrestling with CSS, the backend can feel like someone else's problem. …
Why I'm Building Decision Systems Instead of Prediction Systems
Most software projects focus on producing outputs. Most AI projects focus on producing predictions. But real organizations don't operate on outputs or…
AI Search Systems for Businesses: The Next Big Opportunity for Developers
Most businesses have a search problem. Not a Google-scale problem. An operational problem. Employees waste hours searching through: PDFs CRMs spreadsh…
The benchmark that made me change my mind about Jakarta EE in 2026
The first table made me uncomfortable: on my machine, with the lab’s realistic workload, Embedded GlassFish seemed to beat Spring Boot. If I had publi…
Why Java + Spring Boot is Still the King of Enterprise Backend (2026)
Why Java + Spring Boot is Still the King of Enterprise Backend (2026) After 13 years building enterprise systems across PayPal, Salesforce, and NCR, I…
C# мне нравится больше Java. Но в банковском enterprise мне всё равно понадобилась Java
C# я до сих пор считаю одним из самых удобных языков для backend разработки. В нём много вещей к которым быстро привыкаешь: свойства, LINQ, async/awai…
Minimal Code Doesn’t Mean Stable Code
The argument sounds reasonable: fewer lines of code mean fewer bugs. Simpler to review, easier to reason about, less surface area for defects. Sounds …
Designing TikTok from Scratch — A System Design Deep Dive
Who is this for? Mid-to-senior engineers preparing for system design interviews, or anyone curious how a short-video platform at billion-user scale ac…
How to add Peppol e-invoicing to your SaaS without making it your team's problem
If your SaaS already does B2B billing for customers in Europe, sooner or later one of them will ask: "Can you send my invoices through Peppol?" Belgiu…
llm-nano-vm v0.8.0 — deterministic FSM runtime for LLM pipelines, now with output validation and per-step timeouts
PyPI: pip install llm-nano-vm GitHub: http://github.com/Ale007XD/nano_vm MCP gateway: http://github.com/Ale007XD/nano-vm-mcp I've been building a dete…
Why ChatGPT Cannot Replace Travel Agents — Notes from Building the Backend
Every few months a tech publication runs some variant of "ChatGPT will replace travel agents." The argument sounds airtight: travel planning is mostly…
Stop Storing Passwords: Build Enterprise SSO in Laravel 🛡️
Passwords are a Technical Liability When building a B2B SaaS platform at Smart Tech Devs, the default instinct is to scaffold standard email and passw…
The Future of Architecture in the AI Era -A Backend Developer’s Perspective
For years, backend engineering culture treated architecture as a sign of engineering maturity. We debated: Monoliths vs Microservices Clean Architectu…