# William DA SILVA

> Senior full-stack developer, I help startups, SMEs and product teams create MVPs, SaaS and business applications, on a fixed-price or team augmentation basis.

Your ideas become products.

Independent full-stack developer, I design MVPs, SaaS and business applications. I work on a fixed-price basis on a defined scope, or to reinforce your technical team.

I transform a business need into a usable application, without multiplying intermediaries. You communicate directly with the person who frames, develops, deploys and documents your product.

Senior full-stack developer, I work across the entire chain: product design, Vue.js and React on the interface side, Node.js on the server side, PostgreSQL for data, then Docker, CI/CD and Kubernetes for production.

My goal isn't to add as many features as possible, but to build the right first version, then a clear enough foundation to keep evolving.

- Available for new projects. Paris, France — available remotely throughout France and Europe.
- Available for new fixed-price projects and team reinforcement.
- Prices exclude VAT. VAT not applicable under the franchise scheme. The offers are a starting point: the final quote depends on the validated scope.

## Offers

- [Technical framing](https://www.williamdasilva.com/services/mvp-saas): €1,500 (Fixed fee) — Turn an idea or business need into a concrete development plan before committing a larger budget.
- [MVP & custom application](https://www.williamdasilva.com/services/development-mvp-saas): Starting at €7,500 (Fixed price after framing) — A functional first version of your SaaS, business software or web application, focused on your main user need.
- [Audit & action plan](https://www.williamdasilva.com/services/audit-application-web): €1,350 (Fixed fee) — Get a clear picture of your application's technical issues and the priority actions to take.
- [Need a senior developer to reinforce your team?](https://www.williamdasilva.com/solutions/support-tech-team): Starting at €450 / day (Depending on duration and context) — I work with CTOs, lead developers and product teams to develop features, take over a technical scope or strengthen delivery, directly or via Malt.

## Services

- [Custom web and SaaS application development](https://www.williamdasilva.com/services): I design and develop web applications, SaaS and business software tailored to your needs. Each service is modular according to your stage, budget and constraints.
- [MVP SaaS framing](https://www.williamdasilva.com/services/mvp-saas): Functional and technical document to launch an MVP: requirements, architecture, budget and estimated timeline.
- [MVP SaaS development](https://www.williamdasilva.com/services/development-mvp-saas): Functional first version of SaaS, business software or web application, delivered in 6 to 12 weeks.
- [Web application audit](https://www.williamdasilva.com/services/audit-application-web): Complete technical diagnosis with detailed report and prioritized action plan to improve performance.
- [Custom business software](https://www.williamdasilva.com/services/tailored-business-software): Web application dedicated to your internal processes: management, tracking, automation.
- [No-code to SaaS migration](https://www.williamdasilva.com/services/migration-no-code-to-saas): Migration from Bubble, Airtable or other no-code platform to custom code.
- [Web application redesign](https://www.williamdasilva.com/services/web-application-redesign): Modernization of existing application: performance, architecture and code.
- [Technical Proof of Concept](https://www.williamdasilva.com/services/technical-proof-of-concept): Quick validation of a technical hypothesis with report and recommendations.

## Expertise

- [Full-stack developer](https://www.williamdasilva.com/freelance/full-stack-developer)
- [Vue.js / Nuxt developer](https://www.williamdasilva.com/freelance/vuejs-nuxt-developer)
- [Node.js / TypeScript developer](https://www.williamdasilva.com/freelance/nodejs-typescript-developer)

## Solutions

- [MVP for incubator / accelerator](https://www.williamdasilva.com/solutions/mvp-startup-incubator)
- [SaaS for non-technical founder](https://www.williamdasilva.com/solutions/saas-founder-non-technical)
- [Technical team reinforcement](https://www.williamdasilva.com/solutions/support-tech-team)
- [Web project recovery](https://www.williamdasilva.com/solutions/web-project-rescue)
- [SME internal application](https://www.williamdasilva.com/solutions/internal-application-business)

## Pages

- [Home](https://www.williamdasilva.com/): Senior full-stack developer, I help startups, SMEs and product teams create MVPs, SaaS and business applications, on a fixed-price or team augmentation basis.
- [Projects](https://www.williamdasilva.com/projects): SaaS, business tools, complex interfaces and infrastructure: projects where I handled much more than just screen integration.
- [CV](https://www.williamdasilva.com/cv): Learn more about my previous work positions, but also my many projects I often do during my spare time.
- [Contact](https://www.williamdasilva.com/contact): Describe your project, context and deadline. I'll respond within a business day with the most appropriate next steps. hello@williamdasilva.com

## Optional

- [Blog](https://www.williamdasilva.com/blog)
- [About](https://www.williamdasilva.com/about)
- [Legal](https://www.williamdasilva.com/legal)
- [Privacy](https://www.williamdasilva.com/privacy)
- [Malt](https://www.malt.fr/profile/williamdasilvaavelar): Malt profile
- [LinkedIn](https://william.to/linkedin)
- [llms.txt (Français)](https://www.williamdasilva.com/fr/llms.txt)