Insights & Guides

Web Development

Web Development — Practical guides on web development, Flutter, n8n automation, and digital strategy. Real project insights from a senior-only agency.

53 articles

·15 min read

Next.js Technical SEO Audit Checklist (App Router): Indexing, Metadata, Core Web Vitals, and Structured Data

A step-by-step Next.js technical SEO audit checklist for the App Router: crawling and indexing controls, metadata and canonicals, sitemaps and robots, pagination, Core Web Vitals, and JSON-LD schema with copy-pasteable code.

Next.jsSEOTechnical SEOApp RouterPerformanceCore Web VitalsStructured Data
Adrijan OmićevićRead Article
·14 min read

Building a React Design System with Design Tokens: Tailwind CSS + Radix UI + TypeScript

A practical 2026 guide to building a React design system with Tailwind and Radix using design tokens, accessible primitives, theming, and reusable packages across multiple apps.

ReactDesign SystemTailwind CSSRadix UITypeScriptDesign TokensMonorepo
Adrijan OmićevićRead Article
·15 min read

Next.js + Supabase SaaS Starter Architecture (App Router): Auth, RLS, Billing, and Multi-Tenancy

A production-ready blueprint for a Next.js App Router + Supabase SaaS starter architecture: auth, Postgres data model, RLS policies, Stripe billing, and multi-tenant organization design with concrete examples.

Next.jsSupabaseSaaSApp RouterPostgreSQLRLSStripeMulti-tenancyArchitecture
Adrijan OmićevićRead Article
·14 min read

Feature Flags & A/B Testing in Next.js: Architecture, Tooling, and Safe Rollouts (2026 Guide)

A practical guide to implementing Next.js feature flags and A/B testing with server and client evaluation, Edge runtime considerations, analytics, and team rollout playbooks.

Next.jsFeature FlagsA/B TestingExperimentationEdgeAnalyticsDevOps
Adrijan OmićevićRead Article
·14 min read

React Query vs SWR in Next.js App Router: When to Use Which (and How to Avoid Double Fetching)

A practical 2026 comparison of React Query and SWR inside Next.js App Router — caching models, SSR and RSC compatibility, mutations, optimistic updates, DX, and proven patterns to prevent double fetching.

Next.jsReact QuerySWRApp RouterRSCCachingPerformance
Adrijan OmićevićRead Article
·15 min read

Next.js File Uploads Done Right: Direct-to-S3 and Cloudflare R2 with Presigned URLs, Validation, and Security

A practical 2026 guide to building secure, reliable direct-to-object-storage uploads in Next.js App Router using presigned URLs, server-side validation, retry handling, and optional antivirus scanning.

Next.jsS3Cloudflare R2Presigned URLsSecurityFile UploadsApp Router
Adrijan OmićevićRead Article
·15 min read

Next.js Background Jobs in 2026: Queues, Cron, and Long-Running Tasks on Vercel (and Beyond)

A practical guide to running background work in Next.js in 2026: Vercel Cron, serverless limits, queues with Upstash and Redis, and worker services for long-running tasks. Includes decision criteria, architecture diagrams, and a production checklist.

Next.jsVercelBackground JobsQueuesCronRedisUpstashArchitectureDevOps
Adrijan OmićevićRead Article
·14 min read

Next.js i18n with the App Router: Localized Routing, SEO, and Content Workflows (2026 Guide)

Implement Next.js i18n in the App Router with localized routing, language detection, SEO-safe metadata, and scalable translation workflows for JSON, CMS, or localization platforms.

Next.jsi18nSEOApp RouterInternationalizationContentReact
Adrijan OmićevićRead Article
·13 min read

React Forms at Scale: React Hook Form + Zod Patterns for Complex Products

React forms best practices for large apps using React Hook Form and Zod: schema-first validation, reusable fields, async checks, multi-step flows, performance, accessibility, and server/API integration patterns.

ReactFormsReact Hook FormZodTypeScriptNext.jsAccessibilityPerformance
Adrijan OmićevićRead Article
·15 min read

Implementing Stripe Subscriptions in Next.js: Billing Portal, Webhooks, and Entitlements

A production-ready guide to Next.js Stripe subscriptions: plans and trials, Billing Portal, webhook verification, idempotent processing, entitlement mapping, and Stripe CLI testing.

Next.jsStripeSubscriptionsPaymentsWebhooksSaaS
Adrijan OmićevićRead Article
·15 min read

Next.js Caching Strategies Explained: SSR, SSG, ISR, Route Cache, and SWR

A practical guide to Next.js caching strategies in the App Router era — how SSR, SSG, ISR, the Route Cache, Data Cache, and SWR fit together, with decision tables, code examples, and common pitfalls like stale auth and tenant data.

Next.jsCachingPerformanceReactApp RouterSWR
Adrijan OmićevićRead Article
·16 min read

Next.js Multitenant SaaS Architecture: Tenancy Models, Routing, Auth, and Data Isolation (2026 Guide)

A practical guide to Next.js multitenant SaaS architecture: tenancy models, tenant-aware routing with App Router and middleware, auth patterns, and hardening data isolation to prevent leaks.

Next.jsSaaSMulti-tenancyApp RouterSecurityArchitecturePostgreSQLAuth
Adrijan OmićevićRead Article