Fullstack Development Agency

Fullstack development is the end-to-end creation of web and mobile applications — from database architecture and server logic to user interfaces and deployment. Exter.ai is an AI-powered fullstack development agency that uses artificial intelligence throughout the development lifecycle to ship production-grade applications 5–10x faster than traditional agencies. We build with React, Next.js, Node.js, Python, and modern cloud infrastructure. Fixed pricing, full code ownership, and 30 days of free support on every project.

How We Build

01

Discovery

Free 30-minute call. We map your requirements, tech constraints, and goals. Written proposal within 24 hours.

02

Architecture

Database design, API architecture, and tech stack selection. You approve the technical blueprint before we write code.

03

Build

AI-accelerated development in 2-week sprints. Working preview by end of sprint 1. Daily updates.

04

Launch

Testing, security audit, deployment, and documentation. Full ownership transfer. 30 days free support.

What We Build

  • Web applications — SaaS platforms, dashboards, admin panels, customer portals
  • Mobile-responsive apps — Progressive web apps that work across all devices
  • API development — RESTful and GraphQL APIs, third-party integrations
  • Database architecture — PostgreSQL, MongoDB, Redis — designed for scale
  • AI integrations — LLM orchestration, chatbots, voice AI, automation workflows
  • Authentication & security — OAuth, JWT, role-based access, data encryption
  • Real-time features — WebSockets, live updates, collaborative tools
  • CI/CD & DevOps — Automated testing, deployment pipelines, monitoring

Our Tech Stack

  • Frontend: React, Next.js, Vue, TypeScript, GSAP, Three.js
  • Backend: Node.js, Python, Express, FastAPI
  • Database: PostgreSQL, MongoDB, Redis, Supabase
  • Cloud: AWS, Google Cloud, Vercel, Railway
  • AI/ML: OpenAI, Anthropic, LangChain, custom LLM pipelines
  • DevOps: Docker, GitHub Actions, automated testing

Who It's For

  • Startups — MVP to production in weeks, not months
  • Growing companies — Scale existing systems without hiring a full team
  • Enterprises — Custom internal tools, AI integrations, modernization
  • Founders with ideas — Turn your concept into working software, fast

Pricing

Fixed-price proposals after a free discovery call. MVPs from 2–3 weeks, full applications from 4–8 weeks. Price includes development, testing, deployment, documentation, and 30 days of free support. Full code ownership — always.

Frequently Asked Questions

What tech stack do you use?

React, Next.js, Vue, Node.js, Python, PostgreSQL, MongoDB, and cloud platforms. We pick the optimal stack for each project.

How fast can you build a web app?

MVPs in 2–3 weeks, full applications in 4–8 weeks. AI tools in our workflow let us ship 5–10x faster.

Do I own the code?

Yes. Full ownership of all code, databases, and infrastructure. No vendor lock-in.

Can you work with existing code?

Yes. We extend, refactor, and improve existing codebases. We start with an audit and recommendations.

How much does it cost?

Fixed pricing after a discovery call. You know exactly what you're paying before work begins.

Do you provide ongoing support?

30 days of free support included. Monthly retainer plans available for ongoing development.

Ready to Build?

Book a free discovery call. Let's discuss your project, timeline, and get a fixed-price proposal.

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