AI-NATIVE DEVELOPMENT WITH CLAUDE CODE

Production Software. 
Built at AI Speed.

We build web apps, SaaS products, internal tools and websites with Claude Code, Anthropic’s agentic coding tool, pairing AI-assisted engineering with experienced developers who review, test and own every line that ships.
Star iconStar iconStar iconStar iconStar icon
Trusted by 150+ innovators across real estate, finance, healthcare, technology and more.
Where Speed Meets Engineering.
Claude Code lets us move from spec to working software in days, not months. Our engineers set the architecture, write the specs, review the output and test everything, so you get the speed of AI with the reliability of a senior team.
Get in Touch
Get in Touch
4-6 weeks
Typical MVP launch
From scoped spec 
to production.
100%
Code ownership
Your repository, your IP, no platform lock-in.
Every line
Human-reviewed
Reviewed and tested by an engineer before it reaches production.
AI-Assisted, Engineer-Led.
At 42 District, Claude Code is how we build, not a shortcut. Clear specs, small reviewed changes and automated tests keep quality high while delivery stays fast.
Spec-First Builds
We define architecture, data models and acceptance criteria before code is written, so the AI builds the right thing.
Human Review & Testing
Every change is reviewed, tested and security-checked by our engineers before it ships.
Modern, Portable Stack
Next.js, Supabase and Vercel: standard tools any developer can maintain, with no proprietary lock-in.
Soft blue and white gradient background with smooth transitions.
From Spec to Production. Fully Connected.
We use Claude Code across the full build, from data model to deployment, and connect your product to the tools your business runs on.
including:
  • Full-stack web apps and SaaS platforms
  • Internal tools, dashboards and portals
  • Custom websites with a bespoke CMS on Vercel
  • API integrations with your CRM, payments and AI models
  • Documentation and handover your team can build on
Get in Touch
Get in Touch
No items found.
Gradient background blending light blue in the top left corner into pale cream in the bottom right corner.
Build what is next
Build what’s next, with the partner already ahead.
Whether you’re launching a SaaS product or replacing a patchwork of tools, we combine Claude Code’s speed with senior engineering judgement to deliver software you own and can grow.
Get in Touch
Get in Touch
Chat on WhatsApp