Browse categories
Explore
Fiverr Pro
English
$
USD
I will build a custom admin dashboard or internal business tool
Daniel Marquez
About this gig
Your team runs the business on spreadsheets that nobody trusts anymore. Two versions disagree, and every month somebody spends a day fixing it by hand.
I build the internal tool that replaces that: roles, permissions, real data, and one version of the truth.
WHAT YOU GET
- Screens designed around your actual process, not a generic template
- Permissions enforced in the database, not just hidden in the interface
- A real PostgreSQL data model, designed to grow
- Search, filters, exports and an audit trail
- Deployed and running, with the code and the database yours from day one
HOW I WORK
Every project starts with a written scope: screens, data model, milestones and acceptance criteria. You approve it before I write code. That is what makes a fixed price honest.
Stack: Next.js, TypeScript, Supabase, PostgreSQL, Tailwind, Vercel.
Need more than 10 screens? Message me and I will send a custom offer for the full scope.
Building software since 2021. Native Spanish speaker in Argentina, working American business hours.
Get to know Daniel Marquez
Daniel Marquez
Full Stack Web Developer Custom web apps with Next js and Supabase
- FromArgentina
- Member sinceAug 2026
Languages
Spanish, English
I build custom web applications end to end — interface, backend, database, security and deployment. My stack is Next.js, TypeScript, Supabase/PostgreSQL, Tailwind and Vercel.
Before writing code, I write the spec: screens, data model, milestones and acceptance criteria. That is what makes a fixed price honest instead of a guess.
Native Spanish speaker, based in Argentina — I work in American time zones, so we can talk in real time during your business hours.
Tell me the problem you need to solve and I'll tell you straight whether I'm the right person for it.
FAQ
How is this different from a no-code tool or a template?
A template gives you someone else's process. A no-code tool gives you a tool you cannot leave. This is real code and a real PostgreSQL database, built around how your business actually works. If you stop working with me tomorrow, any developer can pick it up.
Do I own the code and the database?
Yes, both, from day one and in every package. Not a licence, not a subscription. It is yours, and I hand over everything needed to run it without me.
What if I need more than 10 screens?
Two options. Add screens one by one with the Additional page extra, or message me with the full picture and I will send a custom offer covering the whole system with defined milestones. For anything large, the custom offer is the honest way to price it.
How do we start, and can we talk first?
Message me and describe the process you want to replace. I will ask real questions and tell you straight whether this is something I should take on. Once the order is placed we can use Fiverr's video call feature. I am in Argentina, available in American business hours, and I speak native Spanish if
