Insights & Guides

Web Development & Automation Insights

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

26 articles

FeaturedNext.js
·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
·15 min read

Web Application Observability: A Practical Guide to Logging, Metrics, and Tracing for React and Next.js

An end-to-end, production-ready observability setup for React and Next.js: error tracking, performance monitoring, structured logs, tracing, dashboards, and alerts that catch real issues.

ObservabilityNext.jsReactLoggingMetricsTracingSREDevOps
Adrijan OmićevićRead Article
·13 min read

React Component Architecture for Scale: Patterns for a Maintainable Design System

A pragmatic React component architecture for large React and Next.js codebases: composition, compound and polymorphic components, theming, folder conventions, anti-patterns, and a refactoring playbook your team can follow.

ReactNext.jsDesign SystemsArchitectureTypeScriptUI Engineering
Adrijan OmićevićRead Article
·16 min read

Next.js Authentication in 2026: NextAuth vs Clerk vs Supabase (What We Use for Client Projects)

A practical comparison of Next.js authentication options in 2026 — NextAuth, Clerk, and Supabase — across UX, security, cost, setup time, and enterprise requirements, with decision matrices for SaaS, internal tools, and B2B portals.

Next.js authenticationNext.jsApp RouterNextAuthClerkSupabaseSecuritySaaS
Adrijan OmićevićRead Article