How to Launch an MVP in 90 Days Without Burning Your Budget

A website is a storefront. A web app is a product. If your business has outgrown a contact form and needs user dashboards, billing, roles, CRM and ERP integrations — you need a SaaS or a custom web app, not yet another landing page.

In this article the WoronaWeb team shares the practical 90-day MVP launch plan we use on real projects. At the end — a link to a free discovery audit of your idea.

When a business actually needs a web app, not a site

Clear signals it's time to move from «site» to «product»:

• Managers manually track clients in Excel and lose data.
• Clients demand a personal dashboard: contracts, invoices, order history.
• There are repeating operations that can be automated (calculations, notifications, reports).
• You need roles: admin, manager, client, partner — with different permissions.
• A subscription-based product (SaaS) or a marketplace.
• Integrations with external systems: payments, CRM, ERP, messengers, logistics.

If at least 2–3 points match — custom development will pay off faster than forcing off-the-shelf SaaS tools into your processes.

The 90-day MVP launch plan

Weeks 1–2: Discovery and architecture

• Product discovery: customer interviews, competitor analysis, Jobs-To-Be-Done.
• User stories and a screen map. Lock down the MVP scope — only what validates the core hypothesis.
• Stack selection: Laravel/Slim + PostgreSQL/MySQL on the backend, Next.js + TypeScript on the frontend.
• Architecture doc: modules, DB schema, API contracts, non-functional requirements (load, security).
• Deliverable: Figma prototype + technical specification + fixed quote.

Weeks 3–4: Design and UX

• Design system: colours, typography, components.
• High-fidelity mockups of key screens (dashboard, account, onboarding).
• Responsive for mobile and tablet.
• Walk the user flow «from sign-up to target action» with a stopwatch.
• Deliverable: approved mockups + interactive clickable prototype.

Weeks 5–10: Development

• Backend: auth, roles, core CRUD modules, billing, API following PSR-12 and SOLID.
• Frontend: SSR/ISR in Next.js, strict typing, design system on React components.
• Infrastructure: GitHub/GitLab, CI/CD, staging environment, auto deploy.
• Integrations: payments (Stripe/LiqPay/Kaspi), email, SMS, webhooks.
• Every week: client demo, backlog updates.
• Deliverable: working app in staging with 100% coverage of MVP-scope user stories.

Weeks 11–12: Testing and launch

• QA: e2e tests of critical scenarios (Playwright/Cypress), load test, security audit.
• Analytics hookup: GA4, PostHog/Amplitude, Sentry for errors.
• Move to production, configure domain, SSL, CDN, backups.
• Documentation for the client's team: admin panel, typical operations, API.
• Deliverable: live product + 30 days of free support + a 6-month growth plan.

The stack we use and why

• PHP 8.x + Laravel / Slim: mature ecosystem, Eloquent/ORM, queues, events, clean SOLID architecture. Legacy doesn't become a pain after 2 years.
• Next.js 15 + TypeScript: SSR for SEO, ISR for speed, App Router, React Server Components. One codebase for marketing site and product.
• PostgreSQL: reliable transactions, JSONB, full-text search without Elastic at launch.
• Redis: cache, queues, rate limiting.
• Docker + CI/CD: identical environments on every machine, automated tests before every merge.

5 mistakes that kill SaaS projects

• «Let's build everything at once». The MVP turns into a 12-month marathon, the budget burns out, the market moves to competitors. Fix — hard MVP scope and iterations.
• No metrics from day one. Without PostHog/Amplitude you won't know where users drop off in onboarding and why they don't renew.
• Sloppy «back-of-napkin» architecture. In 6 months refactoring costs more than rewriting. PSR-12, SOLID and code review aren't snobbery — they're project economics.
• Cutting corners on design. A SaaS with 2015-era UX loses customers during the free trial. A B2B buyer in 2026 is still human and still compares you to Notion and Linear.
• No after-launch plan. Launch it and forget — death of a product. You need a 6–12 month roadmap and product metrics: activation, retention, NRR.

Costs and the team you need

Approximate MVP ranges (we lock a precise quote after discovery):

• Simple SaaS (1–2 core modules): 12–20 weeks, small team.
• Medium SaaS (billing, roles, 5+ modules): 16–24 weeks.
• Marketplace / multi-sided platform: from 20 weeks, phased launch.

Minimum working team per project: product manager, UX/UI designer, backend engineer, frontend engineer, QA. At WoronaWeb we cover all these roles ourselves — you don't have to source and coordinate multiple contractors.

Get a free discovery audit of your idea

If you're thinking about launching a SaaS, a customer portal or an internal web app — submit a request at woronaweb.com. During a 60-minute discovery call we'll:

• Break down your idea through the Jobs-To-Be-Done framework.
• Define the minimum MVP scope to validate the core hypothesis.
• Suggest a technical stack and estimate timelines.
• Show 2–3 references from our portfolio relevant to your niche.
• Send you a PDF with the launch plan and budget range.

It's free and with no obligations. The sooner you get an expert's outside view, the lower your chance of burning the budget on features you don't need.