Software Engineering and Technical Articles by John Kavanagh

Model service page schema without overclaiming by matching visible content, Service data, OfferCatalog, breadcrumbs, FAQs, entities, and proof clearly.

How service pages become easier for AI search to retrieve and summarise through clear problems, visible proof, internal links, schema, and answers.

AI coding tools make code faster to produce, but technical debt still needs review, ownership, tests, documentation, and senior engineering judgement.

Diagnose traffic drops after a redesign, migration, or replatform by checking route parity, rendered HTML, redirects, canonicals, sitemaps, and schema.

How to migrate e-commerce product and category pages to Next.js without losing SEO value, including URLs, filters, schema, canonicals, and redirects.

AI can inflate output without improving outcomes.

AI will be OK if teams treat it as real technology, not magic, with adoption shaped by judgement, skills, governance, shared access, and careful autonomy.

Decide whether Shopify to Next.js is worth it by weighing storefront control, SEO, performance, checkout, apps, content workflow, cost, and risk.

Artificial superintelligence means AI that broadly outperforms humans, not just a better chatbot.

Timing attacks explained for web developers, including side channels, string comparisons, real examples, and practical defences in JavaScript.

How to design multi-tenant Next.js architecture across routing, domains, configuration, content, caching, previews, analytics, and team ownership.

Vuex vs.

Plan Content Security Policy in Next.js with static pages, nonces, third-party scripts, headers, frames, previews, and incremental deployment safely.

A Pages Router to App Router migration checklist for Next.js teams, covering routing, data fetching, caching, metadata, server components, and rollout.

AEO explained alongside SEO and GEO, covering answer engines, featured snippets, AI answers, content structure, measurement, and practical workflow.

How to isolate Core Web Vitals regressions after a redesign, covering LCP, INP, CLS, templates, scripts, images, fonts, data, and release evidence.

Solve the N-Queens problem with TypeScript backtracking, including the decision tree, constraints, complexity, and test cases.

AI automation improves productivity, but unmanaged labour displacement risks weaker demand, brittle organisations, concentrated gains, and a race to the bottom.

Why production data breaks Next.js sites, including CMS fields, slugs, images, relations, dates, rich text, generated routes, and validation gaps.

How to vet a senior Next.js developer for replatforming, recovery, SEO, performance, CMS, Vercel, and production debugging work.

Use Angular signals for performance optimisation with derived state, computed values, OnPush, effects, RxJS interop, and measuring whether work improved.

Responsible AI becomes real only when decision ownership, data handling, audit trails, exceptions, procurement, and support are assigned to people.

How to debug NextAuth when it works locally but fails in production, covering callback URLs, cookies, secrets, middleware, providers, and Vercel.

Solve Kth Smallest Element in a BST with in-order traversal, showing why the tree’s ordering removes the need for a separate sorting step in interviews.

Manage Angular state with RxJS Subjects and derived streams, including combineLatest timing, AsyncPipe cleanup, local UI state and when signals fit better.

Debug Next.js build timeouts on Vercel by checking route generation, CMS data fan-out, memory pressure, image work, caching, logs, and platform limits.

React developer vs.

Solve Combination Sum with backtracking in TypeScript, using a growing path, remaining total, sorted pruning, reuse rules, and common mistakes too.

GEO and SEO overlap, but they are not interchangeable.

A Next.js production triage checklist for broken deploys, covering rollback decisions, logs, environment drift, routes, auth, CMS data, and cache.

A clear walkthrough of LeetCode Jump Game using a greedy algorithm, including why the farthest-reach approach works and where slower ideas get stuck.

Memoisation helps JavaScript functions run faster by caching previous results.

Next.js Proxy replaces Middleware in v16.

A production runbook for stale CMS content in Next.js, covering webhooks, route dependencies, ISR, cache boundaries, preview, and editor trust.

How to solve LeetCode Coin Change with dynamic programming, and why the obvious greedy approach fails on exactly the cases worth understanding in interviews.

Next.js gives us two ways to handle back-end logic: API Routes and Server Actions.

The diameter of a binary tree is the longest path between any two nodes.

A headless CMS SEO checklist covering metadata, canonicals, schema, redirects, sitemaps, preview, internal links, image fields, and publishing controls.

How to solve Course Schedule with topological sort in TypeScript, comparing Kahn's algorithm with DFS cycle detection and why in-degrees read clearly.

Enterprise AI delivery usually fails after the demo, when ownership, governance, support, procurement, data access, and measurement have to become real.

Technical SEO launch criteria for Next.js migrations, covering URLs, redirects, canonicals, metadata, rendered HTML, schema, sitemaps, and recovery.

What GEO is, where it overlaps with SEO and AEO, and why crawlability, evidence, structure and practical judgement matter more than AI tricks.

The JavaScript module pattern explained through closures and private state, plus the architectural lessons it still teaches modern developers today.

Compare rendered HTML before and after a migration, checking headings, metadata, links, schema, body copy, media, crawl signals, and launch risk.

Solve Rotting Oranges with multi-source BFS in TypeScript, treating each queue level as one minute and tracking fresh cells until spread completes.

Compare client-side React caching, Next.js SSG, ISR and SSR caching, and Redis-backed caches for reliable serverless data fetching and persistence.

How to diagnose traffic loss after a WordPress to Next.js migration by checking redirects, rendered HTML, metadata, canonicals, and tracking noise.

Agentic systems do not replace service design.

A WordPress to Next.js migration checklist for URLs, content models, media, preview, redirects, metadata, schema, sitemaps, SEO, and launch checks.

Solve Kth Largest Element in an Array with Quickselect in TypeScript, comparing sorting, heaps, partitioning, random pivots, and trade-offs under pressure.