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William DA SILVA
William DA SILVA
Full-Stack Developer

MVP Development

MVP SaaS Developer — Custom application development

I design and develop the first functional version of your SaaS, business software or web application. The scope, budget and timeline are confirmed before starting.

Your product needs a first concrete version

You have a validated idea or business need, but no functional application yet. You're looking for a developer capable of turning a specification — or a simple brief — into a usable product, without multiplying intermediaries. An MVP is not an incomplete prototype. It's the first version of a real product, focused on the paths that create value, and ready to welcome real users.

Who this service is for

Suitable if

  • You have a clear business need and an identified target audience
  • You want a functional first version in 6 to 12 weeks
  • You want an autonomous technical partner, without a dedicated internal team
  • You're looking for a fixed-price project with predictable budget and timeline

Not suitable if

  • You haven't yet defined your value proposition or target audience
  • You expect a finished product with 20 features from the first version
  • You're looking for a junior developer for execution without advice

Expected results

  • A functional web application, deployed and accessible to your users
  • Clean, documented source code ready to evolve
  • A solid technical foundation to iterate quickly on subsequent versions
  • 30 days of bug fixes included after delivery

Deliverables

  • Responsive web interface (Vue.js or React)
  • Back-end, REST API and database (Node.js, PostgreSQL)
  • Authentication and user access management
  • Main business workflows and administration interface
  • Unit and integration tests
  • Production deployment and technical documentation
  • 30 days of post-delivery support

Scope examples

B2B SaaS

Platform with authentication, dashboard, project or contact management, and subscription.

Internal business application

Workflow tool, order tracking, schedule management or replacement of a complex spreadsheet.

Marketplace or platform

Connection, listing management, integrated payment and user space.

Data visualization tool

Interactive dashboard, charts, exports and permission management.

Work method

Each project starts with a targeted exchange to understand the context, users and constraints. For a fixed-price project, I formalize the scope, deliverables, budget and timeline before starting. Development is done through visible iterations, with access to the Git repository and regular intermediate versions.

Pricing

Starting at €7,500

Fixed price after framing

The rate depends on the validated scope. A prior framing at €1,500 allows stabilizing the scope, architecture and backlog before engaging development.

Case study

to.it — Drag-and-drop website builder

Vue 3 / Nuxt / Node.js / PostgreSQL application for creating websites through drag-and-drop, with a complex visual editor and Kubernetes deployment.

View case study

Frequently asked questions

How long does MVP development take?

Depending on the scope, expect 6 to 12 weeks for a functional first version. The prior framing provides a precise timeline before starting.

What happens if the scope changes during development?

Any significant change results in a re-estimation. Minor adjustments are naturally integrated. Major scope changes result in an amendment to the fixed-price contract.

Do I need framing before development?

I recommend framing for any project whose scope is not perfectly defined. If you already have a detailed specification and a validated architecture, we can start development directly.

What technologies do you use for an MVP?

I primarily work with TypeScript, Vue.js, Nuxt, Node.js, PostgreSQL, Docker and cloud deployment. The stack is chosen based on your constraints, team and product nature.

Can I continue to evolve the product after delivery?

Yes. The source code belongs to you, documentation is provided, and the architecture is designed to be maintainable. I can also ensure post-delivery follow-up or additional evolution sprints.

Let's talk about your next product.

Describe your need, context and deadline. I'll respond within a business day with the most appropriate next steps.

Describe my project