Why Go became one of the most popular server-side languages
History of Go, simplicity philosophy, goroutines, cloud-native ecosystem, and comparison with Java, Node.js, Python, and Rust for backend engineers.
Yevhen Stuzhuk - Personal Portfolio
I am a Senior Software Engineer
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Backend
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How the Modern Web Works: From Browser to Database
The full HTTP request journey — DNS, TLS, CDN, load balancer, Nginx, backend, Redis, queues, PostgreSQL, and back to the browser. A practical guide for developers and architects.
Six Laravel performance lessons from real client projects
Eloquent abuse, missing indexes, cache, code structure, and client communication — what actually slows Laravel apps down.
Five container runtimes: when runc is not the answer
runc, gVisor, Kata, Firecracker, and WASM on one Go service — cold start, memory, and threat-model fit.
Why a million Rust coroutines weigh less than 100k Python ones
async fn becomes a state machine everywhere — but Rust puts it on the stack while CPython puts it on the heap. Memory benchmarks and practice.
layercache: stopping cache stampedes in Node.js
L1 + Redis, single-flight, and graceful degradation — layercache benchmarks against thundering herds.
Evolution of Web Application Architecture Over the Last 20 Years
From server-side rendering in 2005 to AI apps and edge computing: how web architectures changed, why past choices were not mistakes, and how to pick an approach in 2026.
DeepSeek V4 Pro beats GPT-5.5 Pro on precision
Head-to-head on schema and instruction tasks: DeepSeek 38–33, one regex vs split patterns, fewer unsolicited extras.
Five products in one FastAPI monolith: HTMX, Telegram Mini App, and Stars
getdoday.ru: ~76k lines without React, themeParams and bot DNS pitfalls, Telegram Stars billing with entitlements.
React 19 Form Actions with FastAPI: server validation without duplication
useActionState + Pydantic: one schema, field-level errors, built-in isPending — roughly half the form code.
Genkit in Go: building AI apps beyond a single-prompt demo
Google Genkit for Go—structured outputs, multi-step flows, tools, observability, and model swaps without rewriting your logic.
Why BullMQ beat in-API file conversion
Sync conversion in HTTP vs a Redis queue: p95 dropped from 800ms to 3.8ms, throughput rose 4.8×—plus the complexity trade-off.
Database Optimization: Six Strategies That Cut Query Time by 60%
Profiling, indexes, ORM refactors, materialized views, connection pooling, and cache — a practical PostgreSQL and MySQL guide.
Three SQL Injection Patterns That Still Ship in Node.js
Concatenation, template literals, and innocent-looking sql variables — why reviews miss them and how eslint-plugin-pg catches them statically.
Node.js: Factory and Strategy for a cross-platform npm package
EADDRINUSE on Windows, macOS, and Linux without OS if/else chains. Strategy, Factory, TypeScript contracts, and shell-injection-safe runners.
DeepSeek V4 Flash vs GPT-4o: latency, cost, and hybrid routing
Dev.to benchmark: ~0.9s vs ~3.2s p99, order-of-magnitude API economics, and routing most traffic to a cheap model with premium fallback.
Post-mortem: how Firebase RTDB array coercion bricked a React frontend
Deleting one RTDB log entry returned an object instead of an array — white screen and items.map is not a function. Client-side normalization fixes it.
A PostgreSQL-backed job queue in Go: the Swig example
Jobs table, row locks, JSONB payloads, LISTEN/NOTIFY, and goroutine workers — no Redis if Postgres is already in your stack.
Build an AI Data Analyst That Needs No SQL
Natural language to SQL via LLM, in-process DuckDB, a three-stage pipeline, and read-only guardrails for safe analytics.
SQLite Is All You Need for Durable Workflows
DBOS and Obelisk: local SQLite plus Litestream to S3 for workflow state; Postgres when you need HA and shared scale.
Node.js and banning AI code in core: the 19,000-line debate
A huge model-written PR, CLAs, and maintainer burnout — not «anti-AI», but review process for critical infrastructure.
Validating environment variables in TypeScript
A schema for .env, CI checks, and generated types — catch PORT=abc and empty API_KEY before deploy.
Why transcription alone fails clinical AI in healthcare
Whisper + LLM summary breaks in real practice: healthcare needs clinical reasoning engines and EMR integration, not plain text.
JWT in Node.js: five mistakes that break your API
Base64 is not encryption, alg=none, weak secrets, and refresh without rotation — a pre-production checklist for JWT auth.
7 hidden security risks in Node.js applications
ReDoS, npm supply chain, prototype pollution, secrets in env, and NoSQL injection — a checklist teams often skip after a fast deploy.
JavaScript backends: the full-stack tax
Node.js vs Go/Rust throughput and memory, npm risk, and when a single language stack still wins.