Custom Web Application & SaaS MVP Development
Bespoke client portals, dynamic dashboards, and full-stack SaaS MVPs built on Next.js 14+ App Router, Node.js, and scalable cloud databases.
Why standard agency approaches fall short
The Off-the-Shelf Trap
Generic SaaS tools rarely fit unique business workflows, forcing teams to juggle disconnected spreadsheets and pay expensive per-seat subscriptions forever.
The Slow Agency Nightmare
Enterprise consultancies charge £25,000 to £50,000+ and take 4 to 8 months to build an MVP, burning through your budget before real users ever see the product.
Proprietary Lock-in
Many agencies build on proprietary frameworks that hold your business hostage, requiring expensive monthly retainers just to keep the software running.
Engineering deliverables & specifications
Role-Based Authentication & Sessions
Secure JWT / session-based authentication with role permissions (Admin, Member, Client, Billing) and passwordless email login.
Dynamic Interactive Dashboards
Responsive data tables with real-time filtering, search, pagination, and visual performance charts (Recharts / SVG).
Stripe Subscriptions & Automated Billing
Seamless Stripe Customer Portal integration for recurring subscriptions, tiered pricing, webhooks, and PDF invoicing.
Serverless Database Architecture
Clean PostgreSQL or Supabase data modeling with row-level security (RLS), ACID compliance, and instant edge query speeds.
REST & GraphQL APIs with Webhooks
Production-grade endpoints for external integrations, third-party CRM syncing, and automated data processing.
100% Clean Code & Git Repository Handover
Complete ownership of the TypeScript codebase, CI/CD pipeline, and hosting accounts with zero ongoing licensing fees.
Frequently Asked Questions
How much does a custom web application or SaaS MVP cost?
At Saim Dev, bespoke web applications and SaaS MVPs start from £1,250 to £2,500 depending on feature scope, user roles, database complexity, and API integrations. We work on a transparent fixed milestone basis: 50% deposit and 50% upon final production deployment approval.
How long does it take to build and launch an MVP?
Most custom web app MVPs are architected, developed, and deployed within 10 to 14 business days. We prioritize core high-value features so you can launch to real users and generate revenue rapidly.
Who owns the code and intellectual property?
You own 100% of the source code, assets, and database architecture from day one. Upon project completion, we hand over full Git repository access with zero proprietary licensing or hostage retainers.
What tech stack do you build web applications with?
We engineer web applications using modern, enterprise-proven stacks: Next.js 14/15 App Router, React 19, TypeScript, Node.js, Tailwind CSS, PostgreSQL, Supabase, and Stripe, deployed on edge infrastructure like Vercel or AWS.
Explore Related Tools & Case Studies
Review live interactive compliance software, open calculation engines, and engineering guides built by our studio.
Ready to engineer your platform?
Contact our senior software engineer directly for a transparent scope review and fixed milestone quote.