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In an era dominated by high-level abstractions and a focus on rapid development, the C programming language seems like a relic to many — an "outdated" tool with manual memory management and "dangerous" pointers. But what if these are its greatest strengths?

Maxim Orlov, a programmer at Postgres Professional with 22 years of experience, argues that C is not about quick wins and fast prototypes, but about fundamental control and a deep, philosophical understanding of how computers work. Join us for a journey from an initial frustration with Pascal to a profound appreciation for C, and learn why this "bastion of calm" is more relevant than ever.

If you’re wondering how to promote your Telegram channel and actually get more subscribers — this guide is for you.

I’ve run several Telegram channels and tested dozens of free and paid Telegram promotion methods — from SEO optimization to Telegram Ads.

In this article, I’ll share 10 free ways to promote your Telegram channel that truly work.

These methods are simple, proven, and can help you grow your audience organically — without spending a single dollar.

Можно сосредоточить сотрудников на решении бизнес-задач и настоящей инженерной магии, если скинуть рутину на плечи ИИ. В прошлой статье мы рассказали об успешном опыте создания отдельного сервиса скоринга клиентов для персональных промоакций, и о том, как небольшой сервис быстро вырос в самостоятельный инструмент — платформу монетизации предложений от поставщиков MPS (Monetization Platform for Suppliers), — и позволил увеличить количество и качество промокампаний.

 С запуском платформы MPS мы автоматизировали большинство шагов по подготовке маркетинговых кампаний. И до настоящего времени узким местом в масштабировании промозапусков оставалась ручная отрисовка коллажей товарных позиций для персональных предложений в мобильном приложении.

Масштабировать количество дизайнеров вместе с маркетинговыми кампаниями — идея, достойная триллера, но не бизнеса. Рабочим решением стало создание сервиса автоматической генерации промоколлажей товарных позиций. И в этой статье мы поговорим о целях проекта и его технической реализации от постановки задачи до боевого использования в проде. Автоматизация отрисовки маркетинговых коллажей спасла наших дизайнеров от рутинного копипаста, улучшила бизнес-метрики и подарила клиентам такие промо, на которые хочется смотреть, а не закрывать глаза :)

I’ve been using the Gemini CLI a lot lately for my coding projects. I really like how it helps me work faster right inside my terminal. But when I first started, I didn’t always get the best results. Over time, I’ve learned some simple tricks that make a huge difference. If you use the Gemini CLI, I want to share my top 10 pro tips. If you are ready, then let’s get started.

Привет, Хабр! Меня зовут Евгений Сабиров, я развиваю тестировщиков в Точка Банк. Много лет занимаюсь подготовкой докладчиков к конференциям, грейдирую и собеседую тестировщиков. И за это время не мог не заметить, насколько размыта зона ответственности этой роли: где-то тестировщик отвечает за коммуникацию с клиентами и проработку дизайна, где-то — только за написание автотестов, при этом про анализ требований даже не вспоминают. Такая размытость сама по себе нормальна: разным командам нужны разные навыки.

Проблемы начинаются тогда, когда тестировщик меняет работу или сталкивается с грейдами внутри компании. То, что ценилось в одной команде, может оказаться невостребованным в другой. Возникает естественный вопрос: какие знания и навыки должен иметь тестировщик, чтобы быть полезным в любой более-менее типовой команде?

В этой статье я попробую очертить роль тестировщика, выделить её ключевые обязанности и показать, как эти активности вписываются в процесс разработки. Это поможет самим тестировщикам яснее понимать ценность своей работы, а руководителям — более чётко распределять зоны ответственности внутри команды.

When I started working with AWS SageMaker, one of the most common questions was: “Which inference type should I choose for my model?” SageMaker offers four different options, and at first glance, the differences between them aren’t always obvious. Let’s break down when and which approach to use.

In the big data era, data is one of the most valuable assets for enterprises. The ultimate goal of data analytics is to power swift, agile business decision making. As database technologies advance at a breathtaking pace in recent years, a large number of excellent database systems have emerged. Some of them are impressive in wide-table queries but do not work well in complex queries. Some support flexible multi-table queries but are held back by slow query speed.

Each type of data has a data model that best represents them. However, in real business scenarios, there is no such thing as ultra-fast data analytics under the perfect data model. Big data engineers sometimes have to make compromises on data models. Such compromises may cause long latency in complex queries or damage the real-time query performance because engineers must take the trouble to convert complex data models into flat tables.

New business requirements put forward new challenges for database systems. A good OLAP database system must be able to deliver excellent performance in both wide-table and multi-table scenarios. This system must also reduce the workload of big data engineers and enable customers to query data of any dimension in real time without worrying about data construction.

Investing in Application Security (AppSec) and DevSecOps is no longer optional; it's a strategic imperative. However, securing budget and justifying these initiatives requires moving beyond fear and speaking the language of business: Return on Investment (ROI).

This guide provides a structured framework for calculating the costs and benefits of embedding security into your software development lifecycle (SDLC). By understanding and applying concepts like Total Cost of Ownership (TCO), Lifecycle Cost Analysis (LCCA), and Return on Security Investment (ROSI), you can build a compelling financial case, guide your security strategy, and prove tangible value to stakeholders.

Go client for Gotenberg — document conversion service supporting Chromium, LibreOffice, and PDF manipulation engines.

Features

- Chromium: Convert URLs, HTML, and Markdown to PDF

- LibreOffice: Convert Office documents (Word, Excel, PowerPoint) to PDF

- PDF Engines: Merge, split, and manipulate PDFs

- Webhook support: Async conversions with callback URLs

- Stream-first: Built on httpstream for efficient multipart uploads

Stream-first HTTP Client for Go. Efficient, zero-buffer streaming for large HTTP payloads — built on top of net/http.

httpstream provides a minimal, streaming-oriented API for building HTTP requests without buffering entire payloads in memory.Ideal for large JSON bodies, multipart uploads, generated archives, or continuous data feeds.

- Stream data directly via io.Pipe—no intermediate buffers

- Constant memory usage (O(1)), regardless of payload size

- Natural backpressure (writes block when receiver is slow)

- Thin net/http wrapper—fully compatible

- Middleware support: func(http.RoundTripper) http.RoundTripper

- Fluent API for readability (GET, POST, Multipart, etc.)

- No goroutine leaks, no globals

httpstream connects your writer directly to the HTTP transport. Data is transmitted as it's produced, allowing the server to start processing immediately—without waiting for the full body to be buffered.

In a previous article, I proposed the holographic hypothesis: an LLM isn't a database of facts, but an interference field—a landscape of probabilities shaped by billions of texts. But a static landscape is just potential. How does the model actually move through it? How does it choose one specific answer from infinite possibilities?

This is where the Narrative Engine comes in. If the holographic hypothesis describes the structure of an LLM's "mind," the narrative engine hypothesis describes its dynamics. It is the mechanism that drives the model, forcing its probabilistic calculations to follow the coherent pathways of stories. This article critiques modern prompting techniques through this new lens, arguing that we are not programming a machine, but initiating a narrative.

Design thinking is a customer‑focused, non‑linear iterative approach to solving problems and finding creative solutions in the process of creating a human‑centered intuitive design for a product. It involves cross‑functional teams working together to study their users, address complex problems and think outside the box to drive innovation. Let's discuss the stages, principles and goals of this important process, as well as the positive impact it has on the design teams. 

Stages of design thinking

Design thinking is a non‑linear process, which means each team can organize it in the way most suitable for their current workflow. Nevertheless, experts define 5 stages that design thinking should include, not necessarily in the following order. 

Apache Druid has been a staple for real-time analytics. However, with evolving and sophisticated analytics demands, it has faced challenges in satisfying modern data performance needs. Enter StarRocks, a high-performance, open-source analytical database, designed to adeptly meet the advanced analytics needs of contemporary enterprises by offering robust capabilities and performance.

In this article, we’ll explore the functionalities, strengths, and challenges of both Apache Druid and StarRocks. Using practical examples and benchmark results, we aim to guide you in identifying which database might best meet your data needs.

Alright. I pose the same question to an LLM in various forms. And this statistical answer generator, this archive of human knowledge, provides responses that sometimes seem surprisingly novel, and other times, derivative and banal.

On Habr, you'll find arguments that an LLM is incapable of novelty and creativity. And I'm inclined to agree.
You'll also find claims that it shows sparks of a new mind. And, paradoxically, I'm inclined to agree with that, too.

The problem is that we often try to analyze an LLM as a standalone object, without fully grasping what it is at its core. This article posits that the crucial question isn't what an LLM knows or can do, but what it fundamentally is.

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The Problem: Traditional phishing emails are relatively easy to spot. AI-generated ones are not.

python.

Traditional approaches to SQL query generation often rely on instruction-tuned language models, but these can be inefficient and inaccurate. In this article, we’ll explore a new method based on reinforcement learning for model fine-tuning, which can improve both the accuracy and efficiency of SQL generation.

Hello, Habr! We continue the series of articles on the innovations of the Tantor Postgres 17.5.0 DBMS, and today we will talk about authorization support via OAuth 2.0 Device Authorization Flow is a modern and secure access method that allows applications to request access to PostgreSQL on behalf of the user through an external identification and access control provider, such as Keycloak, which is especially convenient for cloud environments and microservice architectures (the feature will also be available in PostgreSQL 18). In this article, we'll take a step-by-step look at configuring OAuth authorization in PostgreSQL using Keycloak: configure Keycloak, prepare PostgreSQL, write an OAuth token validator in PostgreSQL, and verify successful authorization via psql using Device Flow.

Exposed is an SQL library for Kotlin with DSL and DAO APIs for database interactions. While it comes with support for standard SQL data types, you can extend its functionality by creating custom column types.

Custom column types are useful when Exposed lacks support for specific database types (like PostgreSQL's enum, inet or ltree) or when you want to map columns to domain-specific types that better align with your business logic. By implementing custom columns, you gain control over data storage and retrieval while maintaining type safety.

In this article, we'll explore how to create custom column types in Exposed by creating a simple column type for PostgreSQL's enum.

The “test everything” principle doesn’t improve data quality — it destroys it. Hundreds of useless alerts create noise that drowns out truly important signals, and the team stops responding to them. Google and Monzo have already moved away from this approach.

Here’s how to shift from blanket testing to targeted checks at nodes with the greatest impact radius — and why one well-placed test at the source is worth more than a hundred checks downstream.