You will get a full-stack AI web app with dashboard, auth, and payments
Project details
I build production-ready AI web applications, not demos: SaaS MVPs, internal platforms, AI document workflows, CRM tools, analytics dashboards, and paid web apps that real users log into every day.
My stack: Next.js/React + TypeScript on the front end; Node and Python/FastAPI APIs; PostgreSQL/Supabase with proper multi-tenant isolation and row-level security; Stripe for subscriptions and billing; and OpenAI, Claude or Gemini integrated where they genuinely add value. I design the data model, auth and roles, the AI layer, deployment, and the admin tooling around it.
What sets the work apart: AI is treated as a feature inside a reliable system, not the whole product. That means grounded outputs, guardrails, cost control, logging, and a schema built to grow instead of being thrown away after v1.
If you have a rough idea, a Figma, a messy prototype, or a half-built codebase, I'll turn it into a scoped plan and a working product you can launch and keep extending.
My stack: Next.js/React + TypeScript on the front end; Node and Python/FastAPI APIs; PostgreSQL/Supabase with proper multi-tenant isolation and row-level security; Stripe for subscriptions and billing; and OpenAI, Claude or Gemini integrated where they genuinely add value. I design the data model, auth and roles, the AI layer, deployment, and the admin tooling around it.
What sets the work apart: AI is treated as a feature inside a reliable system, not the whole product. That means grounded outputs, guardrails, cost control, logging, and a schema built to grow instead of being thrown away after v1.
If you have a rough idea, a Figma, a messy prototype, or a half-built codebase, I'll turn it into a scoped plan and a working product you can launch and keep extending.
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$1,500
|
Standard
$4,500
|
Advanced
$9,500
|
|---|---|---|---|
| Delivery Time | 10 days | 21 days | 45 days |
Number of Revisions | 0 | 0 | 0 |
Number of Pages | 2 | 5 | 10 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code | - | - | - |
Frequently asked questions
About Joao
Full-Stack Product Engineer | SaaS, AI Systems, APIs, Cloud
Amarante, Portugal - 8:58 am local time
I build SaaS platforms, internal tools, dashboards, API-heavy web apps, agent systems, and creative product experiences where the hard part is not only writing code. It is turning a messy product vision into a system that users can understand, teams can operate, and future developers can extend.
I run CodeAhead, a product engineering studio in Portugal. My portfolio includes:
- An AI app-builder platform with multi-tenant architecture, live preview, deployment flows, payments, admin tooling, and a large Next.js/React codebase.
- A cloud-native AI agent platform with multi-agent orchestration, memory, workflow builder, channel adapters, OAuth integrations, local computer control, and hundreds of executable tools.
- A vehicle diagnostics product with iOS, Cloudflare Workers, D1/R2, admin dashboards, workshop portals, audio/ML processing, OCR, subscriptions, and international expansion planning.
- Developer tools for multi-agent coordination, MCP, browser automation, CRDT session state, signed event logs, and local-first agent workflows.
- Creative product experiments with high-end UI, motion, 3D/WebGL, brand systems, and interactive dashboards.
What I can build for you:
- SaaS MVPs with dashboard, auth, database, payments, admin tools, usage limits, and deployment
- Full-stack web apps with role-based access, workflows, file handling, notifications, reporting, and audit logs
- Internal tools, client portals, CRM workflows, API integrations, operational dashboards, and data pipelines
- AI agents with tool calling, workflow state, approvals, human review, memory, and cost control
- RAG/document workflows for search, Q&A, extraction, classification, citations, and structured outputs
- OpenAI, Claude, Gemini, vector database, and multi-model integrations inside real products
- Next.js/React frontends with TypeScript, clean UX, responsive design, motion, and production-ready UI
- Backend APIs with Node.js, Python/FastAPI, Hono, PostgreSQL/Supabase, Cloudflare Workers, D1/R2, and Stripe
- Cloud deployment, environment setup, monitoring, documentation, and source code handoff
How I work:
1. Understand the product vision, users, workflow, risks, and business constraints.
2. Turn the idea into a first useful release with clear scope.
3. Define the data model, roles, screens, APIs, integrations, and technical architecture.
4. Build the frontend, backend, database, workflows, and AI layer when it adds value.
5. Deploy, test the main flows, document the system, and hand over source code.
I am a good fit if you need someone who can think with you, challenge weak assumptions, design the system, and build the first version. I am strongest on projects with moving parts: users, roles, billing, external APIs, files, queues, agents, dashboards, admin tooling, analytics, and deployment.
If you already have a rough idea, Figma, existing app, messy prototype, or partial codebase, I can turn it into a scoped technical plan and a working product.
Steps for completing your project
After purchasing the project, send requirements so Joao can start the project.
Delivery time starts when Joao receives requirements from you.
Joao works on your project following the steps below.
Revisions may occur after the delivery date.
Scope & architecture
We lock scope, data model, roles, and the AI approach, then I confirm exactly what ships for your tier before any build starts.