Web Development Agency for Startups & Enterprises

We primarily work with React, Next.js, Node.js, and TypeScript for building modern web applications. For databases, we use PostgreSQL, MongoDB, and Redis. Our infrastructure runs on AWS, Vercel, and Railway. We choose the best stack based on your project requirements, team size, and long-term maintenance needs.

An MVP typically takes 6-10 weeks. A full-featured web application takes 3-6 months depending on complexity. Enterprise-grade platforms may take 6-12 months. We provide a detailed timeline after the discovery phase so you know exactly what to expect at every milestone.

It depends on the module set, and every number here is reproducible. A web app with accounts, payments, a content layer and an admin panel is 750-1,340 hours, or $23,000-$41,000 at our rate card. Add the third-party systems you already pay for and it is 840-1,560 hours, or $26,000-$48,000. Everything on the module list, across web and mobile, is 2,200-4,300 hours, or $67,000-$131,000. A marketing site sits below the smallest configuration the model prices, so we quote those as a fixed price. Price your own scope at kultrix.com/cost-calculator.

Yes, we are a full-stack development team. We handle everything from UI/UX design and frontend development with React and Next.js, to backend APIs with Node.js, database architecture with PostgreSQL, authentication, and cloud deployment. You get a complete solution from a single team.

A website primarily displays static content (marketing sites, blogs). A web application is interactive - users log in, manage data, and perform complex actions (like Notion, Slack, or a SaaS dashboard). We specialize in building web applications, though we also create high-performance marketing websites.

Absolutely. We regularly join existing projects, perform code audits, and improve or extend existing applications. We can work with most JavaScript/TypeScript stacks and adapt to your established coding standards, CI/CD pipelines, and development workflows.

Yes. We offer ongoing maintenance packages that include bug fixes, security updates, performance monitoring, dependency upgrades, and feature development. Most clients continue working with us after launch because maintaining a web application requires the same expertise as building it.

We follow OWASP security best practices throughout development. This includes input validation, parameterized queries to prevent SQL injection, XSS protection, CSRF tokens, secure authentication with bcrypt hashing, HTTPS enforcement, and regular dependency vulnerability scanning. We also conduct security reviews before launch.

We follow an agile methodology: Discovery (requirements, architecture planning) → Design (UI/UX, prototyping) → Development (2-week sprints with regular demos) → Testing (automated tests, QA) → Launch (deployment, monitoring) → Iteration (feedback-driven improvements). You have full visibility at every stage.

Yes. We set up complete CI/CD pipelines with GitHub Actions, configure hosting on AWS, Vercel, or Railway, manage domains, SSL certificates, and environment variables, and ensure your application runs reliably in production with proper monitoring and alerting.

Yes. PWAs combine the best of web and mobile - they work offline, can be installed on home screens, and send push notifications, all while being accessible via a URL. We build PWAs using Next.js with service workers, providing a native-like experience without the App Store submission process.

We use Next.js with server-side rendering (SSR) which provides fully rendered HTML to search engine crawlers. We implement proper meta tags, Open Graph data, structured data (JSON-LD), semantic HTML, canonical URLs, sitemaps, and Core Web Vitals optimization. This ensures your web application ranks well in Google and is discoverable by AI assistants.