Notebook

Notes

Programming, architecture, and the rest of the work. Each entry can include text, images, and video. There are also tools and the list at /api/posts?lang=en.

• Architecture · October 28, 2026

  Observability: logs, metrics, tracing, and OpenTelemetry

  Logs recount events, metrics show trends, and traces follow a request. Instrument so you can investigate what you did not anticipate.

• Architecture · October 28, 2026

  Node.js vs Bun vs Deno: how to choose a backend runtime in 2026

  Do not choose only by requests/s. Ecosystem, compatibility, operations, and the performance of your real application.

• Architecture · October 28, 2026

  SQL, query builders, and ORMs: Knex, Prisma, Drizzle, and company

  Do not compare every tool as if they were the same thing. Decide how much abstraction you need and how much control over SQL you want to keep.

• Architecture · October 28, 2026

  Node.js vs Bun vs Deno in 2026: an architecture decision

  The best runtime is the one that meets your requirements with the right balance of performance, compatibility, security, and operational cost.

• Architecture · October 28, 2026

  Containers and Twelve-Factor: from your machine to production

  A container makes the environment more reproducible; it does not by itself turn the app into a secure, scalable, easy-to-operate service.

• Architecture · October 28, 2026

  Deno in 2026: security, TypeScript, and a new way to run JavaScript

  Deno makes sense when permissions, web APIs, and integrated tooling solve real needs. Node compatibility has advanced, but you must verify it.

• Architecture · October 28, 2026

  Authentication: why prefer cookies (and what to do if you cannot)

  If you control the web app, an HttpOnly cookie session usually mitigates XSS token theft better than a JWT in localStorage. When that is not enough and how to fix it.

• Architecture · October 27, 2026

  Node.js in 2026: why it is still a solid backend bet

  Maturity, ecosystem, and operations. Node does not need to win every benchmark to be a strong architecture decision.

• Programming · October 27, 2026

  AI for software development: there is no best tool, there is a best fit

  Choose by task and workflow. Assistants, design, coding agents, and images do not compete for the same ranking.

• Architecture · October 27, 2026

  Deploys in monorepos: common problems and how to solve them

  A monorepo does not force you to deploy everything together. How to detect impact, build artifacts, and publish only what you need.

• Architecture · October 27, 2026

  Bun in 2026: is it really faster than Node.js?

  Bun deserves evaluation for its runtime and tooling. A benchmark advantage only matters if it survives your code, dependencies, and real environment.

• Architecture · October 27, 2026

  How push notifications work: VAPID, FCM, APNs, and cross-platform

  Push is not a direct connection to the phone. Tokens, topics, VAPID, FCM, APNs, Web Push, and what changes with Capacitor, React Native, or Flutter.

• Architecture · October 26, 2026

  Monorepo: Bun Workspaces vs pnpm Workspaces vs Nx

  Bun and pnpm manage packages; Nx orchestrates tasks. How to choose without mixing layers or adding unnecessary complexity.

• Architecture · October 25, 2026

  What makes an API slow? Benchmarks and architecture decisions

  There is no universally faster protocol. How to measure the full operation and choose REST, GraphQL, gRPC, or events with data.

• Architecture · October 24, 2026

  Cache and compression: optimize before you scale

  Cache avoids repeated work; compression reduces bytes. How to apply them safely in REST, GraphQL, gRPC, and real time.

• Architecture · October 23, 2026

  WebSockets, SSE, and Webhooks: communication beyond REST

  Not every app needs a permanent bidirectional channel. When to use WebSockets, SSE, or Webhooks depending on who initiates the event.

• Architecture · October 22, 2026

  gRPC vs REST: communication between microservices

  gRPC is not faster REST. Contracts, streaming, and when it fits internal services versus a public API.

• Architecture · October 21, 2026

  REST vs GraphQL: when you need flexibility

  GraphQL does not replace REST in every case. When query flexibility adds value and what operational cost it implies.

• Architecture · October 20, 2026

  REST: how to design and optimize an API

  REST does not make an API fast by itself. How to design endpoints, cache, compression, and connections before changing protocol.

• Architecture · October 19, 2026

  Frontend architecture decision: React, Angular, Vue, and performance

  How to choose a framework, rendering strategy, and mobile approach without confusing popularity with fit. A scenario-based guide for 2026.

• Architecture · October 19, 2026

  NestJS, Spring Boot, and FastAPI: does the language matter that much in 2026?

  Three different stacks, similar ideas. What you can and cannot conclude from syntax, architecture, and public benchmarks.

• Note · October 14, 2026

  This blog runs on Next.js

  The pages and the articles API come from the same project. Nest is no longer in the middle.

• Note · October 13, 2026

  How to publish an article

  A Markdown file in content/posts/en is enough for it to appear on the site and in the API.

• Programming · October 12, 2026

  Read articles from another service

  The list and detail live at /api/posts. The body arrives as Markdown, not HTML.

• Architecture · October 11, 2026

  One entry, two readings

  The note’s file feeds the page and the API. The architecture fits in one drawing.