React / Next.js Development

Next.js Apps With
AI Built In.

Full-stack web applications on Next.js 16 — TypeScript, Supabase, Claude API, and Vercel edge deployment from day one.

Start My Web App →Book a Free Call

Demand Signals builds every Next.js app with AI features from day one — intelligent search, content generation, and automated workflows. Next.js powers 8 of the top 10 fastest-growing SaaS platforms, and we deploy on Vercel's edge network across 100+ global locations.

What We Deliver

Cutting-Edge Web Applications Built on React & Next.js

1Feature 1 of 6

Marketing Platforms

Database-driven marketing sites with dynamic pages, schema markup, and AI content pipelines. This site — demandsignals.co — runs on Next.js.

Marketing Platforms
Client Portals & Dashboards
E-commerce & Booking
AI-Powered Tools
Multi-Tenant Platforms
Progressive Web Apps
0+
Vercel Edge Locations
0
Top 10 SaaS Platforms on Next.js
0%
Target Lighthouse Score
0hr
Project Scoping Turnaround
Our Stack

Built on Technology, Powered by AI

Our stack is designed for speed, reliability, and AI integration. Next.js gives us server-side rendering and API routes. Supabase handles data with row-level security. Claude API powers AI features. Vercel deploys to the edge globally.

Technology Stack

FrameworkNext.js 16 (App Router, React 19)
LanguageTypeScript (strict mode)
DatabaseSupabase (PostgreSQL + RLS + Realtime)
AIClaude API (Sonnet for speed, Opus for complex)
AuthSupabase Auth (SSO, OAuth, magic links)
PaymentsStripe (subscriptions, invoicing, one-time)
HostingVercel Pro (edge network, zero-config)
StylingTailwind CSS + CSS Modules
Google Lighthouse Audit

Green Scores Rank Higher. We Build Green.

Google uses Chrome Lighthouse audits as a direct ranking signal. Sites that score green across Performance, Accessibility, Best Practices, and SEO get preferential treatment in search results. Most agencies deliver sites scoring 40-60. We ship 90+.

Mobile
97
Performance
94
Accessibility
100
Best Practices
100
SEO
FCPLCPTBTCLSSI
97
Performance
Core Web Vitals
First Contentful Paint1.2s
Largest Contentful Paint2.6s
Total Blocking Time60ms
Cumulative Layout Shift0
Speed Index1.3s
0-49
50-89
90-100
Desktop
100
Performance
94
Accessibility
100
Best Practices
100
SEO
FCPLCPTBTCLSSI
100
Performance
Core Web Vitals
First Contentful Paint0.3s
Largest Contentful Paint0.6s
Total Blocking Time0ms
Cumulative Layout Shift0
Speed Index0.4s
0-49
50-89
90-100
Live audit of dsig.demandsignals.dev — April 2026
The AI Difference

AI isn't an add-on. It's the architecture.

Every Next.js app we build has AI in the foundation — not bolted on after the fact. Content generation, intelligent search, automated workflows, and structured data pipelines are part of the architecture from sprint one. Your app gets smarter the longer it runs.

Your site compounds in authority every week — automatically
AI handles the repetitive work, humans handle the strategy
Faster results at a fraction of traditional agency cost
Real-time optimization based on actual search data
See How This Works for You →
From the Blog

Insights That Move the Needle.

Real-time analysis of Google updates, AI model releases, and the strategies that actually work for local businesses.

Search UpdatesCore UpdatesAI EngineeringSearch CentralIndustry TrendsHow-ToCase Studies
AI Engineering

Claude Mythos: Anthropic's 10-Trillion-Parameter Model and the New AI Arms Race

A Fortune investigation revealed Anthropic is testing Mythos — a 10-trillion-parameter model with unprecedented cybersecurity capabilities. Combined with Xiaomi's anonymous Hunter Alpha launch, the frontier AI race just entered a new phase.

HunterApr 6, 202611 min read
AI Engineering

Claude 5 on the Horizon: What to Expect from Anthropic's Next Frontier Model

Anthropic is expected to release Claude 5 in Q2-Q3 2026. Based on the Opus 4.x trajectory and Anthropic's research publications, here is what businesses should prepare for.

HunterApr 5, 20268 min read
AI Engineering

The Vibe Coding Revolution: How AI-Built Apps Are Reshaping Software Development

Vibe coding — describing what you want and letting AI build it — has gone from novelty to production reality in 2026. We break down where it works, where it fails, and what it means for businesses that need custom software.

JasperApr 3, 20268 min read
Search Updates

AI Overviews on 48%+ of Searches: GEO and AEO Are Now Table Stakes

AI Overviews now appear on nearly half of all Google searches. Businesses without GEO and AEO strategies are invisible in the fastest-growing discovery channel. The window for early-mover advantage is closing.

MorganApr 1, 20268 min read
Search Central

Are Websites Getting Fat? Page Weight, HTML Size, and Googlebot's Limits

Google Search Central analyzes the trend of growing page sizes and explains Googlebot's practical limits for crawling and rendering heavy pages, with clear implications for site performance and indexing.

JasperMar 30, 20265 min read
Core Updates

Google March 2026 Core Update Complete: Final Analysis and Recovery Roadmap

The March 2026 core update finished rolling out on March 27th. Final data confirms a major shift toward local authority signals and structured content. Here is the complete analysis and a recovery roadmap for affected sites.

CyrusMar 29, 202610 min read
How-To

Building an AI-First Website in 2026: Why Next.js Is the Foundation

An AI-first website is not a website with a chatbot. It is a website architected from the ground up for AI agent integration, LLM discoverability, and dynamic content generation. Next.js is the framework that makes this feasible.

HunterMar 26, 20269 min read
AI Engineering

Google TurboQuant: The Compression Breakthrough That Puts Frontier AI on Your Laptop

Google's TurboQuant algorithm compresses AI model memory by 6x and speeds inference by 8x — with zero accuracy loss. No retraining required. This changes who can run frontier AI and where.

HunterMar 24, 202610 min read
Search Central

Search Console Custom Chart Annotations Demystified

Google Search Central explains how to use custom chart annotations in Search Console to track site changes, algorithm updates, and correlate events with ranking shifts over time.

HunterMar 24, 20264 min read
Core Updates

Google March 2026 Core Update: Patterns Emerge as Rollout Passes Midpoint

The March 2026 core update is past its midpoint. Clear patterns are emerging: AI content farms are down, local businesses with strong E-E-A-T are up, and sites invested in GEO are seeing disproportionate gains.

CyrusMar 23, 20269 min read
How-To

Why Every Local Business Needs AI Review Management in 2026

Online reviews now directly influence AI Overview citations, LLM recommendations, and traditional search rankings. Manual review management cannot keep pace. Here is the case for AI-automated review response.

GabbyMar 20, 20268 min read
AI Engineering

GPT-5.4 Mini and Nano: Free-Tier AI Access and What It Means for the Market

OpenAI releases GPT-5.4 mini and nano variants with free-tier access. When frontier-adjacent AI capabilities cost nothing, the competitive landscape for every business shifts permanently.

MorganMar 17, 20267 min read
AI Engineering

Claude Mythos: Anthropic's 10-Trillion-Parameter Model and the New AI Arms Race

A Fortune investigation revealed Anthropic is testing Mythos — a 10-trillion-parameter model with unprecedented cybersecurity capabilities. Combined with Xiaomi's anonymous Hunter Alpha launch, the frontier AI race just entered a new phase.

HunterApr 6, 202611 min read
AI Engineering

Claude 5 on the Horizon: What to Expect from Anthropic's Next Frontier Model

Anthropic is expected to release Claude 5 in Q2-Q3 2026. Based on the Opus 4.x trajectory and Anthropic's research publications, here is what businesses should prepare for.

HunterApr 5, 20268 min read
AI Engineering

The Vibe Coding Revolution: How AI-Built Apps Are Reshaping Software Development

Vibe coding — describing what you want and letting AI build it — has gone from novelty to production reality in 2026. We break down where it works, where it fails, and what it means for businesses that need custom software.

JasperApr 3, 20268 min read
Search Updates

AI Overviews on 48%+ of Searches: GEO and AEO Are Now Table Stakes

AI Overviews now appear on nearly half of all Google searches. Businesses without GEO and AEO strategies are invisible in the fastest-growing discovery channel. The window for early-mover advantage is closing.

MorganApr 1, 20268 min read
Search Central

Are Websites Getting Fat? Page Weight, HTML Size, and Googlebot's Limits

Google Search Central analyzes the trend of growing page sizes and explains Googlebot's practical limits for crawling and rendering heavy pages, with clear implications for site performance and indexing.

JasperMar 30, 20265 min read
Core Updates

Google March 2026 Core Update Complete: Final Analysis and Recovery Roadmap

The March 2026 core update finished rolling out on March 27th. Final data confirms a major shift toward local authority signals and structured content. Here is the complete analysis and a recovery roadmap for affected sites.

CyrusMar 29, 202610 min read
How-To

Building an AI-First Website in 2026: Why Next.js Is the Foundation

An AI-first website is not a website with a chatbot. It is a website architected from the ground up for AI agent integration, LLM discoverability, and dynamic content generation. Next.js is the framework that makes this feasible.

HunterMar 26, 20269 min read
AI Engineering

Google TurboQuant: The Compression Breakthrough That Puts Frontier AI on Your Laptop

Google's TurboQuant algorithm compresses AI model memory by 6x and speeds inference by 8x — with zero accuracy loss. No retraining required. This changes who can run frontier AI and where.

HunterMar 24, 202610 min read
Search Central

Search Console Custom Chart Annotations Demystified

Google Search Central explains how to use custom chart annotations in Search Console to track site changes, algorithm updates, and correlate events with ranking shifts over time.

HunterMar 24, 20264 min read
Core Updates

Google March 2026 Core Update: Patterns Emerge as Rollout Passes Midpoint

The March 2026 core update is past its midpoint. Clear patterns are emerging: AI content farms are down, local businesses with strong E-E-A-T are up, and sites invested in GEO are seeing disproportionate gains.

CyrusMar 23, 20269 min read
How-To

Why Every Local Business Needs AI Review Management in 2026

Online reviews now directly influence AI Overview citations, LLM recommendations, and traditional search rankings. Manual review management cannot keep pace. Here is the case for AI-automated review response.

GabbyMar 20, 20268 min read
AI Engineering

GPT-5.4 Mini and Nano: Free-Tier AI Access and What It Means for the Market

OpenAI releases GPT-5.4 mini and nano variants with free-tier access. When frontier-adjacent AI capabilities cost nothing, the competitive landscape for every business shifts permanently.

MorganMar 17, 20267 min read
View All 140+ Posts →
FAQ

Frequently Asked Questions

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