You will get a custom full-stack web app built with Next.js, React and Supabase


Project details
I build custom full-stack web applications using Next.js, React, TypeScript, and Supabase — the same stack I used to build KINTI CRM (kinticrm.com), a live multi-tenant SaaS platform for insurance brokers in Ecuador. You'll get clean, production-ready code with authentication, database design, responsive UI, and deployment on Vercel. Whether you need a CRM, dashboard, marketplace, or internal tool, I'll take your idea from spec to a working app. Tell me what you want to build and I'll make it happen.
Programming Languages
JavaScript, TypeScriptCoding Expertise
Performance OptimizationWhat's included
| Service Tiers |
Starter
$300
|
Standard
$700
|
Advanced
$1,500
|
|---|---|---|---|
| Delivery Time | 7 days | 14 days | 21 days |
Number of Revisions | 2 | 3 | 5 |
Number of Pages | 5 | 10 | 20 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | |||
Source Code |
Frequently asked questions
About Alejandro
Full-Stack Developer | Next.js, Supabase, AI Integration, MCP Servers
Guayaquil, Ecuador - 3:49 pm local time
What I do best:
- AI Integration: chatbots, RAG and LLM features (Claude / OpenAI) with tool-calling, embedded into new or existing apps. BYOK supported.
- Custom MCP servers: connect AI assistants (Claude, ChatGPT) to your APIs, databases and B2B platforms.
- SaaS and MVP development: multi-tenant apps with Next.js (App Router), React, TypeScript, Tailwind, Supabase (PostgreSQL with Row-Level Security) and Vercel.
- Automation and scraping: Playwright and Python bots that remove repetitive manual work.
Proof of work: I designed and shipped KINTI, a multi-tenant SaaS CRM in production for insurance brokers in Ecuador — Kanban sales pipeline, client and policy management, automated renewal alerts, role-based access and an admin panel, with strict per-tenant data isolation (RLS).
Why work with me:
- Same business hours as US Eastern (Ecuador) for real-time collaboration.
- Security-first: RLS, no secrets in client code, careful PII handling.
- I ship in days, not weeks, with a plan, test and deliver workflow.
- Async-first: I work over Upwork messages and Loom videos. No calls needed — I reply within 24h.
Tell me what you are building and I will reply with the fastest secure path to ship it.
Steps for completing your project
After purchasing the project, send requirements so Alejandro can start the project.
Delivery time starts when Alejandro receives requirements from you.
Alejandro works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery & planning
We align on scope, tech stack, and timeline. I'll review your requirements and ask clarifying questions before writing a single line of code.
Design & development
I build the UI and backend iteratively, sharing progress updates so you can give feedback at each milestone.





