The Webhook Bug That Passed Every Test and Every Code Review
When a subscriber disappears from a list, nobody gets an error. The campaign sends, the contact count is one fewer than expected, and unless someone i…
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Why I Put Mirth Connect in Front of FastAPI Instead of Parsing HL7 in Python
When I started building my Maternity HL7-to-FHIR Pipeline , my first instinct was to do everything in Python. Parse the HL7 message, map the fields, v…
The Best Python SaaS Boilerplates in 2024: A Comprehensive Guide
The Best Python SaaS Boilerplates in 2024: A Comprehensive Guide Building a SaaS application from scratch means reinventing the wheel on authenticatio…
Building a Self-Healing GitHub Trending API in One Day
What happens when you refuse to accept "the source is down" as an answer. The problem GitHub's trending page is where millions of developers find new …
How I built an OpenAI-compatible prompt encryption proxy in 300 lines of Python
I sell GPT prompts. Small business, $20-50 per prompt, mostly to people who use ChatBox or Cursor. Last month, one of my buyers screenshotted my promp…
One blocking call freezes every request: FastAPI's def vs async def
There's a FastAPI outage that starts with someone doing the right thing. The service has a pile of plain def endpoints written by whoever came before,…
Mastering FastAPI Background Tasks: Real‑World Patterns, Testing, and When to Reach for Celery
Introduction If you’ve built a FastAPI endpoint that needs to send a confirmation email, generate a PDF, or kick off a long‑running data import, you p…
FastAPI WebSockets: Production-Ready Setup and Scaling
FastAPI websockets let you push data to a client the moment it changes, without the overhead of polling. In a few lines you can expose a bidirectional…
React Native + Expo JWT Auth with FastAPI — A Complete Working Example
Most FastAPI JWT tutorials stop at "here's how you issue a token" and never cover the parts that actually break in production: where to store the toke…
Building Role-Based Student, Teacher, and Admin Experiences in EchoEd
A role-based product should involve more than hiding navigation links. Students, teachers, and platform administrators have different goals, data need…
Designing first PRs that do not require a local environment
A "good first issue" is not actually beginner-friendly if a contributor must install a mobile app, an API, two speech engines, and model files before …
I shipped an unauthenticated RCE in my own port scanner — here's the whole chain, and how I killed it
I built a web front end for an Nmap-based port scanner: a FastAPI backend, a React dashboard, background scan jobs, a plugin system, the works. It ran…
Stop Overtraining: Build an AI Agent to Auto-Sync Your Fitness Plan with Your Heart Rate (LangGraph + Notion)
We’ve all been there. You have a "Leg Day" scheduled in your Notion database, but you woke up feeling like a truck hit you. Your Apple Watch says your…
How I Built a Free Online Image & PDF Processing Platform with Vue 3 + FastAPI
How I Built a Free Online Image & PDF Processing Platform with Vue 3 + FastAPI I was tired of online file tools that watermarked my output, forced…
Shifting Left: How TDD Became the Foundation of SokoFlow's Core Engine
SokoFlow Build Log — Month 1 of 4 Last semester I set out on a new strategic plan to level up my software development skills through deliberate, proje…
Как мы строим корпоративную экзаменационную платформу с AI: архитектура, дубли, мульти-tenant и продовые шишки
Привет, Хабр. Хочу рассказать про наш проект Exam AI — внутреннюю платформу для аттестации и тренировки сотрудников. Это не “ещё один тестик на 20 воп…
Analyzing and Troubleshooting Bottlenecks in FastAPI: Optimizing Auth Flow, Cryptography, and Data Serialization
This article is intended for those who, like me, are interested in profiling and performance optimization. Key Takeaways (TL;DR): Offload CPU-bound cr…
FastAPI Crash Course: Build a CRUD REST API in ~40 Lines of Python
I spend most of my days writing Java and Kotlin for FinTech systems at scale. But every now and then, Python pulls me back in — and FastAPI is exactly…
I Built a Self-Hosted Competitor Price Monitor Because SaaS Pricing Is Out of Control
I Built a Self-Hosted Competitor Price Monitor Because SaaS Pricing Is Out of Control The Problem I run a small online store. To stay competitive, I n…
NeoBrain: A Local Alternative to Character.AI
🧠 NeoBrain: локальный аналог Character.AI Запусти ИИ-персонажей на своём ПК — без интернета, VPN и слежки. 🤔 Проблема Character.AI хорош, но: ❌ Заблок…
Building an AI Content Studio with Angular, FastAPI, and LangGraph
TITLE: Building an AI Content Studio with Angular, FastAPI, and LangGraph INTRODUCTION: Combining an Angular frontend, a FastAPI backend, and LangGrap…
Multi-Cloud Deployment in Production: Cloud Run, Railway, Oracle Cloud
Multi-Cloud Deployment in Production: Cloud Run, Railway, Oracle Cloud Published on : 2026-06-06 Reading time : 10 min Tags : #devops #cloud #fastapi …
Пять продуктов в одном FastAPI-монолите: HTMX вместо React, грабли Telegram Mini App и биллинг на Stars
TL;DR: Привет, Хабр. С 2 по 12 мая я в режиме нон-стоп писал Doday — кросс-платформенный todo: web, Telegram Mini App, чат-бот. Получилось 317 коммито…
Как тестировать HTTP-запросы к внешним сервисам в Python-приложениях: requests-mock, pytest-httpx и FastAPI
Не всегда стоит патчить ответ от внешнего HTTP-сервиса через mocker.patch . В таких тестах приложение возвращает ожидаемый ответ, но важная част…
FastAPI Middleware Ordering: Why Your CORS, Auth, and Tenant Context Stack Matters in Production
FastAPI Middleware Ordering: Why Your CORS, Auth, and Tenant Context Stack Matters in Production I spent three days debugging why JWT validation was r…
FlakyDetector 2.0: Один комментарий, который перевернул моё представление о нестабильных тестах
Полгода назад я написал статью про FlakyDetector — инструмент, который ищет нестабильные тесты по одному лишь исходному коду, Потом была с…
Webhook в TestY заставил переписать приложение с нуля: от Flask-костылей к FastAPI
Привет, Хабр! Меня зовут Станислав Кулагин, я ведущий инженер отдела сертификационного тестирования компании YADRO. Я разработал ATS Studio — Flask-пр…
PostgreSQL Connection Pooling in FastAPI: PgBouncer vs. SQLAlchemy QueuePool vs. Render's Native Pools
PostgreSQL Connection Pooling in FastAPI: PgBouncer vs. SQLAlchemy QueuePool vs. Render's Native Pools Connection pooling sounds boring until your Saa…
Зачем backend разработчику Python, если он не собирается становиться data scientist
Долго воспринимал Python как язык из соседнего мира. Где то там data science, pandas, ноутбуки, модели, эксперименты. А у меня обычный backend: API, м…
FastAPI for Data Engineers: Building, Testing, and Debugging APIs That Don't Lie to You
The JobSense project needed a FastAPI backend that served 604 job embeddings via semantic search, a Pydantic validation layer that stopped bad data be…