Frequently asked questions

I’m William Lopez, a freelance web and app developer behind SirVendor. I design and build custom websites, web apps, and mobile apps for founders and businesses — handling everything from the design and front end to the backend and launch. You work directly with me, the person writing the code.

It depends on scope — a focused marketing site is a very different build than a full app with accounts and payments. I scope each project up front and give you a fixed, itemized quote before any work starts, so there are no surprise invoices. Share your goals and I’ll price it honestly.

Timelines depend on scope and how quickly we settle on the design and content. A simple site can come together in a couple of weeks, while a full web or mobile app takes longer. After I scope your project, I give you a realistic timeline with milestones so you always know where things stand.

Yes. I work remotely with clients anywhere and I’m comfortable across time zones. Most communication happens over email, chat, and video calls, with regular progress updates so you’re never left guessing. Whether you’re local or on the other side of the world, the process is the same.

Yes. Once the project is paid for, you own all the code, design files, and assets — full stop. I build on standard, open tools rather than a locked-in proprietary platform, so you’re free to host it anywhere, hand it to another developer, or keep working with me. No hostage situations.

I build with modern, widely-supported tools: React and TypeScript on the web, React Native and Expo for mobile apps, and Node-based backends with SQL or hosted databases. I choose the stack that fits your project and long-term maintainability, not whatever’s trendy — so your product stays easy to extend and hire for.

Yes. After launch I can handle updates, fixes, new features, hosting, and general upkeep — either as-needed or on a simple ongoing arrangement. Because I built it, I already know how everything works, so changes are fast. If you’d rather manage it yourself, I’ll hand over clean, documented code.

Just reach out and tell me what you’re trying to build and roughly what you have in mind. I’ll ask a few questions, scope the work, and send back a clear fixed quote and timeline. There’s no charge to talk it through, and no obligation until you decide to move forward.