Dev4ager designs and builds production-ready SaaS platforms, with authentication, subscription billing, multi-tenancy, and dashboards, in weeks rather than quarters, using AI-assisted development (Claude Code, Cursor) with senior engineers reviewing every merge. Fixed quote after scoping; the code lives in your repo from day one.
What we build
A SaaS product is really five products wearing one UI: the core workflow your users pay for, the onboarding that gets them to it, the billing machinery underneath, the admin you run it with, and the data layer holding it together. We build all five as one coherent system, so you launch with something you can sell, support, and scale.
- Multi-tenant architecture with row-level security and tenant-scoped data
- Authentication and teams: email, OAuth, magic links, roles and permissions
- Stripe subscriptions: plans, trials, seats, metered billing, invoices, dunning
- User-facing dashboards and a founder/admin panel with real metrics
- Transactional email, notifications, and onboarding flows
- CI/CD, staging environment, monitoring, and rollback-ready deploys
How we build it
- Scope. Your idea becomes a fixed scope, price, and timeline, usually within 48 hours.
- Design. Wireframes and UI direction in Figma before code, so you see the product early.
- Build + review. AI-assisted development inside a human-defined architecture; a senior engineer reviews every pull request.
- Ship + support. Tested with Playwright and manual QA, deployed with CI/CD, then iterated as real users arrive.
Stack we reach for
Next.js React TypeScript Supabase PostgreSQL Stripe Tailwind Vercel
A great fit if…
- You're a founder with a validated idea and need a sellable v1, not a prototype.
- You run an agency or business and want to productize a service into recurring revenue.
- Your existing SaaS was built fast and loose, and needs a rebuild that can actually scale.
SaaS development FAQs
How long does it take to build a SaaS platform?
A focused first version, with one core workflow, auth, billing, and a dashboard, typically ships in 4-8 weeks with our AI-assisted workflow. Larger multi-role platforms run longer; we give a fixed timeline after scoping.
Do you handle subscriptions and billing?
Yes. We wire Stripe subscriptions end to end: plans, trials, seat-based or metered billing, invoices, dunning, and webhooks, plus the upgrade and downgrade flows inside your app. See our payment integration service.
Should my SaaS be single-tenant or multi-tenant?
Most products should start multi-tenant (one database, tenant-scoped data with row-level security) because it's cheaper to run and faster to ship. We design the data model so you can offer isolated tenants later for enterprise deals.
Who owns the code and infrastructure?
You do, from day one. We build in your GitHub organization and your cloud accounts (Vercel, Supabase, Stripe), so there's zero vendor lock-in if we ever part ways.
Related
MVP Development Admin Dashboards Payment Integration Guide: MVP costs in 2026
Have a SaaS in your head?
Tell us the core workflow. We'll return a fixed scope, price, and timeline, usually within 48 hours.
Start Your SaaS