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

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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
Search Updates

Google AI Overview Inline Links Shake Up SEO in May 2026

While most focus on the click-through drop, DSIG explains why the new inline link placement in AI Overviews creates massive opportunities for agencies that understand citation-first content strategies

JasperMay 126 min read
AI Engineering

Anthropic Just Shipped 10 Finance Agents — Why That Matters Beyond Wall Street

Anthropic released ten ready-to-run agent templates for financial services — pitch builders, ledger reconcilers, KYC screeners, and more. The architecture under those agents is the real story, and it applies to every industry, not just finance.

HunterMay 58 min read
Search Updates

60% Zero-Click Crisis: How to Win When Google AI Stops Traffic

58.5% of Google searches now end without a click. Most agencies are treating it as a crisis. They're wrong — it's the biggest opportunity in digital marketing since social media advertising matured.

JasperApr 276 min read
AI Engineering

Claude Design Is Here: How AI Just Rewrote the Rules for Visual Content Creation

Anthropic just launched Claude Design — a visual creation tool that builds from your existing brand systems and hands off directly to developers. Here's what it means for businesses trying to scale content and design output without growing headcount.

HunterApr 197 min read
AI Engineering

Claude Opus 4.7 and the Desktop That Finally Gets It Right — A Day-One Review

We've been running Opus 4.7 and the redesigned Claude Desktop since an hour after launch. The planning is transformative, the ghost tokens are gone, and the desktop finally lets you orchestrate like a pro.

HunterApr 1711 min read
AI Engineering

Semantic Split Web Design: Building Multi-Layer Sites for Humans, Bots, and AI

The modern website isn't one site — it's three. A visual experience for humans, a structured data layer for search crawlers, and a machine-readable content API for LLMs. We call this architecture Semantic Split Web Design, and it's the future of discovery.

HunterApr 1512 min read
View All 140+ Posts →
Daily

The AI ChangeLog

— What changed across OpenAI, Anthropic, Gemini & DeepSeek
View all changelogs →
FAQ

Frequently Asked Questions

After your web app launches

Admin Hours — Ongoing Development & Iteration

Real apps need real engineering attention — new features, integrations, performance tuning, security patches. Pick a monthly Admin Hours package or pay-as-you-go. Most React/Next clients run on Pro (20 hours/$500/mo) or Agency (40 hours/$1,000/mo).

Starter

Light maintenance
$100 /mo
4 hours/month

Monthly content tweaks, photo swaps, small bug fixes. The minimum-viable cadence to keep a site healthy.

★ Recommended

Growth

Steady updates + small features
$200 /mo
8 hours/month

Monthly content updates, design polish, small feature additions, SEO meta tuning. The sweet-spot for most small businesses.

Pro

Active site, real iteration speed
$500 /mo
20 hours/month

Real momentum — new pages, new features, A/B tests, ongoing redesigns. For businesses actively scaling their web presence.

Agency

Half-time dev partner
$1000 /mo
40 hours/month

A dedicated half-time engineer for your business. New builds, complex features, custom integrations, ongoing strategy.

Or pay-as-you-go: $50/hr, no monthly commitment, billed in 15-minute increments. Not included in Admin Hours: marketing campaigns, email newsletters, paid ads, SEO content writing — those are separate services.

Three Ways to Reach a Real Human

Question, quote, or curious? Pick a channel.

or send a quick note
On a desktop? Call or text us directly at (916) 542-2423

Play & Learn

Games are Good

Playing games with your business is not. Trust Demand Signals to put the pieces together and deliver new results for your company.

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