Frontier Web Engineering & Claude AI Integration Vercel Ready

Engineering High-Performance Web Applications Built for the AI Frontier.

ShadowLab is a next-generation product engineering studio. We build custom full-stack web applications, autonomous agent interfaces, and high-concurrency SaaS platforms powered by Anthropic Claude and scalable edge architecture.

Start Your Web Application Test Claude App Sandbox
45+ Custom Web Apps Built
99.98% P99 System Uptime
<45ms Edge TTFB Response
$24M+ Raised by Partner Startups
shadowlab-runtime // claude-agent-v3.7.ts
LIVE 
// ShadowLab Web Engine - Agentic Orchestration
import { AnthropicClient } from '@anthropic-ai/sdk';
import { VercelEdgeRouter } from '@shadowlab/edge';

export const createAppRuntime = async ({ spec }) => {
  const model = 'claude-3-7-sonnet';
  const contextWindow = 200_000; // Full token context
  
  return new VercelEdgeRouter({
    architecture: 'distributed-microservices',
    latencyTarget: '< 50ms',
    agentTools: ['schema_executor', 'rag_vector_search', 'stripe_billing'],
    security: 'SOC2-TypeII-Compliant'
  });
};
Model Reasoning: Extended Thinking Active
Streaming Speed: 112 tokens/sec
Deployment: Vercel Global Edge

ENGINEERED WITH FRONTIER CLOUD & AI TECHNOLOGIES

Anthropic Claude 3.7 Next.js 15 & React Vercel Edge Platform TypeScript Strict Supabase & Postgres Cloudflare Workers Stripe Billing Engine Tailwind & Vanilla CSS Redis & Upstash WebSockets & WebRTC Anthropic Claude 3.7 Next.js 15 & React Vercel Edge Platform TypeScript Strict Supabase & Postgres Cloudflare Workers Stripe Billing Engine Tailwind & Vanilla CSS
✦ Anthropic Claude for Startups Alignment

Why ShadowLab Builds on Claude AI

We integrate Anthropic’s frontier Claude models directly into production web software—enabling multi-modal reasoning, autonomous agent loops, and deep document intelligence that traditional software cannot match.

Claude 3.7 Sonnet Extended Thinking

We leverage Claude’s adaptive reasoning to execute multi-step problem solving in web apps, from complex code synthesis and data modeling to self-verifying workflow logic.

  • Configurable thinking budgets for web latency vs depth
  • Transparent reasoning inspection & step logging
  • Autonomous validation before user-facing outputs

200,000 Token Active Context

Ingest entire PDF libraries, multi-file codebases, or complex financial ledgers in a single prompt. We build web UIs that browse, query, and synthesize massive context in seconds.

  • Whole-document Q&A with precise citations
  • Enterprise search with sub-second retrieval latency
  • Context caching reducing API overhead by up to 90%

Computer Use & Web Agent Tools

Transform your web app into an autonomous copilot. We implement Claude's precise tool use, API orchestration, and structured JSON output to execute tasks inside web applications.

  • Direct database mutations via typed tool calls
  • Third-party webhook dispatch and reconciliation
  • Self-correcting JSON generation with strict validation

Enterprise Security & Zero Retention

Your users' proprietary data never trains public foundation models. We architect web applications with encryption at rest, token masking, and strict compliance layers.

  • Zero data retention (ZDR) Anthropic enterprise configuration
  • Row-level security (RLS) & granular RBAC
  • Audit logs and compliant telemetry pipelines
Interactive Architecture Simulator

Test the Claude App Architect

Select your startup vision below to generate a real-time architectural blueprint, recommended tech stack, and Claude API integration model designed by ShadowLab.

B2B AI Copilot Architecture Blueprint
Need this built for your startup? Estimated sprint delivery: 4 to 6 weeks.
Inquire With This Spec
End-to-End Capabilities

What ShadowLab Builds

From Day 1 greenfield startup MVPs to high-scale enterprise web systems, we provide deep full-stack engineering tailored for growth and performance.

01

Custom Full-Stack Web Applications

Bespoke, reactive web software engineered with modern component architectures (Next.js, React, Node.js). Multi-tenant databases, role-based access control, and intuitive user experiences.

Next.js 15 TypeScript PostgreSQL Tailwind/CSS
02

AI-Native Webapps & Agent Interfaces

Web applications that leverage Claude 3.7 Sonnet as an intelligent co-pilot. In-context document search, automated form synthesis, streaming response UX, and multi-agent workflows.

Anthropic SDK Tool Calling Vector RAG Streaming UX
03

High-Velocity Startup MVPs

Turn your startup concept into a functional, investor-ready web product in 3 to 5 weeks. We build clean, extensible codebases that scale effortlessly without costly rewrites.

3-5 Week Sprints Stripe Billing Auth & RBAC Vercel Deploy
04

Ultra-Fast Frontend & Web Platforms

Sub-second page speeds, 100/100 Google Lighthouse performance, responsive mobile ergonomics, and fluid micro-animations that establish immediate customer trust.

100 Lighthouse Sub-50ms TTFB Micro-Interactions SEO Optimized
05

Serverless Cloud & API Infrastructure

Resilient backend systems running on distributed edge clouds. Real-time WebSockets, automated CI/CD pipelines, database sharding, and fault-tolerant microservices.

Cloudflare / Vercel WebSockets Supabase / Redis CI/CD Automation
06

Legacy Modernization & Architecture Audit

Revitalize legacy codebases into lightning-fast modern stacks. We audit security bottlenecks, optimize SQL queries, and inject Claude AI capabilities into existing platforms.

Codebase Refactor Speed Optimization Security Audits AI Upgrades
Selected Deployments

Built by ShadowLab

Real web applications and AI platforms shipped to production.

AI-Native Legal SaaS Production Live

LexiCore Intelligence

Custom web application ingesting 100,000+ legal briefs and commercial contracts. Powered by Claude 3.7 Sonnet extended thinking and hybrid vector search to summarize and flag liabilities in real time.

8.4x Faster Contract Review
120k Docs Ingested Monthly
99.9% Citation Accuracy
Claude 3.7 Next.js 15 Vercel Edge pgvector
Real-Time Financial Analytics Production Live

Krypton Terminal

High-concurrency trading terminal web application processing 40,000 live order-book ticks per second over WebSockets. Custom canvas rendering engine with sub-12ms frame response.

< 12ms Frame Update Latency
40k Ticks Per Second
Zero Memory Leaks (Canvas)
TypeScript WebAssembly WebSockets Tailwind
Multi-Tenant Healthcare Portal Production Live

Aetheria Health

HIPAA-compliant patient triage and clinical scheduling portal. Features automated clinical note extraction using Claude’s zero-retention API, reducing physician documentation time by 65%.

-65% Doctor Admin Overhead
HIPAA Encrypted & Audited
4.9/5 Clinician Rating
React Claude ZDR Supabase RLS AWS KMS
Headless High-Scale E-Commerce Production Live

Vortex Retail Engine

Headless webstore architecture delivering instantaneous page transitions and dynamic AI product personalization. Scaled to over 350,000 concurrent shoppers on Black Friday with zero downtime.

100/100 Lighthouse Perf Score
+34% Checkout Conversion
350k Peak Concurrent Traffic
Next.js 15 Vercel Edge Shopify Storefront Stripe
Transparent Venture Pricing

Interactive Project Cost & Sprint Estimator

Configure your product requirements to calculate estimated sprint duration, engineering scope, and recommended architecture tier.

ESTIMATED ESTIMATE
4 Sprints (4-5 Weeks)
$ 14,500 ballpark project tier

Comprehensive Seed MVP package with Next.js, Claude 3.7 integration, Stripe subscription engine, and Vercel edge deployment.

Included Full-Stack Codebase: 100% Client Owned
Vercel & Claude Deployment: Fully Configured
Post-Launch Bug Warranty: 30 Days Included

* Final pricing tailored to exact functional specifications during technical discovery call.

Agile Precision

The ShadowLab Sprint Protocol

We eliminate bureaucratic bloat. You collaborate directly with senior full-stack architects and AI engineers who ship working code daily.

01
DAYS 1 – 3

Architectural Blueprint & System Modeling

We translate your product requirements into typed data schemas, Claude prompt orchestration flows, API contracts, and edge deployment strategies.

System Architecture Graph Database Schema API Spec
02
DAYS 4 – 8

Interactive Design System & UX Prototyping

High-fidelity, responsive Figma prototypes and interactive component libraries built for high conversion, tactile responsiveness, and WCAG accessibility.

Figma UI/UX Mockups Design Tokens Interactive Wireframes
03
DAYS 9 – 22

Full-Stack Engineering & Claude AI Wiring

Daily git commits and continuous staging deployments on Vercel. We engineer the frontend, wire serverless APIs, implement Claude tool-calling hooks, and integrate Stripe.

Working Vercel Staging URL Automated Unit Tests Claude Agent Loops
04
DAYS 23 – 28

Hardening, Penetration Testing & Launch

Load testing under concurrency, security audits, database indexing, SEO validation, and production handover with complete IP ownership and architecture documentation.

100 Lighthouse Audit Production Launch Documentation & Handover
No Black Boxes

Our Battle-Tested Tech Matrix

We use industry-standard, high-velocity technologies with strong open-source ecosystems so you never suffer vendor lock-in.

Startup Founder Validation

Trusted by Venture-Backed Founders

Here is what technical founders and product leads say about building their web systems with ShadowLab.

★★★★★

"ShadowLab took our complex AI legal platform from a raw notion doc to a blazing-fast, production Vercel app in just 4 weeks. Their integration of Claude’s extended thinking was flawless."

ES
Evan Sterling Founder & CEO, LexiCore (Y Combinator S24)
★★★★★

"Finding web engineers who truly understand high-concurrency WebSockets AND how to build around Claude API without massive token waste is rare. ShadowLab delivered our trading dashboard under budget."

MK
Marcus Vance CTO, Krypton Protocol ($4M Seed)
★★★★★

"Our conversion rates jumped 34% after ShadowLab rebuilt our web application on Next.js 15. The animations are buttery smooth, and the codebase is so clean our internal devs love maintaining it."

SL
Sarah Lin VP of Product, Vortex Retail
Common Inquiries

Frequently Asked Questions

Everything you need to know about partnering with ShadowLab for your custom web application and Claude AI builds.

Have a custom architecture question?

Talk to a Senior Architect

As a specialized web studio partnering with Anthropic's Claude ecosystem, we design web applications that maximize Claude 3.7 Sonnet’s extended reasoning, tool-use features, and 200k context windows. For eligible startups, we help structure your technical application and architecture roadmap so you can apply for and make maximum use of Anthropic Claude startup credits.

You do, 100%. All custom source code, database schemas, Claude prompt chains, design tokens, and digital assets belong entirely to your company. We provide complete GitHub repository transfer upon milestone completion.

Vercel provides world-class Edge compute, instant worldwide CDN distribution, zero-downtime rollbacks, preview environments for every git branch, and deep native integration with Next.js and streaming AI responses. It allows your startup to scale to millions of requests with zero DevOps overhead.

Our standard Seed MVP sprint delivers an investor-ready, production-grade web application in 3 to 5 weeks. Larger enterprise platforms with complex multi-agent workflows, SOC2 compliance, and legacy data migrations generally span 6 to 10 weeks across iterative milestones.

Yes. We offer flexible ongoing retainer sprints for continuous feature development, Claude model fine-tuning, latency optimizations, and priority 24/7 SLA monitoring. Alternatively, we provide thorough documentation and onboarding to handover seamlessly to your internal engineering team.

✦ Ready to Build?

Let’s Engineer Your Web Application

Tell us about your startup or product idea. A ShadowLab Founding Architect will review your requirements and respond with a technical architecture breakdown within 24 hours.

🔒 Strict NDA Guaranteed · Zero Data Training · Direct Senior Architect Response
⚡

Direct Founder Access

Skip the intake and schedule a direct 25-minute system design review with our lead architect.

Email: hello@shadowlab.io
🏢

Vercel & Claude Native

We deploy directly to your Vercel organization with automated GitHub CI/CD pipelines.

Vercel Partner Verified ● Active
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