Balloon Partyner
SaaS for party decorators, with PDF quotes sent over WhatsApp, Stripe subscriptions and an AI assistant.
2 days → 3 h to put together a quote
- React
- TypeScript
- TanStack Start
- Tailwind CSS
Live
Danyel Duarte
Product Builder
Digital products built with AI, from discovery to production.
I am looking for a hands-on Product Builder, AI Builder or Product Manager role.
Cascavel, Brazil. Open to remote work.
In numbers
- 20+
- years in technology
- 14 days
- to rebuild a corporate mobile app, with more than 1,300 automated tests
- 2 days → 3 h
- to put together a quote in Balloon Partyner
- −75%
- in IT expenses at AlfaCon
- 12
- people in the technology team I built and led
How I work
Requirements
I work out the problem with the people who will use the product, define the scope and write down what needs to be done.
Architecture
I decide the architecture, the data and the integrations before building starts.
Building with AI
I drive Claude Code and Lovable to build, always under my direction.
Review and tests
I review what the AI produces and require automated tests before moving on.
Release
I publish, watch how it is used and take care of ongoing support.
Featured projects
Oracle Fusion registration bot
Python bot that fills in Oracle Fusion registration screens from spreadsheets, with declarative flows written in JSON.
~300 automated tests, with no dependency on Oracle
- Python
- Playwright
- Chrome DevTools Protocol
- Oracle Fusion (ADF Faces)
TI Conecta
Internal portal for the tax department, with access by role, company and branch, generating SAFX tax files through n8n workflows.
160 automated tests
- Next.js 16
- React 19
- TypeScript
- Supabase
Internal useGrupo Pluma
Mestre Bizu
AI-powered question portal for public exams: reads the exam notice PDF and shows how much of the exam the question bank covers.
up to 600 pages per notice, with the source page of every data point
- Next.js 16
- React 19
- TypeScript
- Supabase
In development
GRT Mobile
Attendance app for contractors at the gatehouse, with offline use, PIN and QR Code. The V2 was rebuilt in 14 days.
14 days to rebuild the V2, part-time
- Expo (React Native)
- TypeScript
- SQLite
- Node.js
Internal useCamada
Other projects
Oracle Fusion report automation
Oracle Fusion reports pulled with n8n through the BI Publisher SOAP web service, with ERP-driven filters and Excel delivery.
CRM for a travel agency
Custom CRM with itineraries, payment tracking and proposals generated through the Google Slides API.
~70% less time to prepare proposals
Bubble Certify
Bubble certification simulator, with timed mock exams, practice by topic, flashcards and a performance dashboard.
Career
2004 – 2012
Java Developer and Software Development Coordinator
Datacoper Software
Built the billing and tax modules of an ERP for agribusiness, in Java with Oracle and PostgreSQL. Later coordinated the support team and helped with customer rollouts.
2012 – 2017
Product Owner
Datacoper Software
Managed the backlog of fiscal accounting and ERP projects for agribusiness, gathering and documenting requirements.
2017 – 2019
Product Owner
Wealth Systems
Led a multidisciplinary team on a sales force automation and CRM project.
2019 – 2021
Business Analyst
DB1 Global Software
Supported the Product Owner on the backlog and mentored teams through the agile transformation, using Kanban.
2021
Senior Business Analyst
Contabilizei
Product discovery, covering research, requirements analysis and backlog refinement.
2021 – 2024
Tech/Product Manager
AlfaCon Concursos Públicos
Cut IT expenses by 75%, built and led a team of 12, introduced Scrum and Kanban (team velocity up 50%) and ran product discovery with four departments, raising user engagement by 60%.
2024 – present
Product Builder
Self-employed
Build mobile apps, SaaS, CRMs and automations with AI for clients and for my own products, owning the full cycle.
2026 – present
IT Analyst
Grupo Pluma Agroavícola
Built TI Conecta, an internal portal for the tax department, and automated Oracle Fusion reports with n8n.
Education
Bachelor's degree in Information Systems, Unipar – Universidade Paranaense (2002 – 2005)
Certifications
- Product Management, with honors (PM3)
- Product Growth (PM3)
- Product Analytics (PM3)
- Product Operations Fundamentals (PM3)
- Scrum Foundation Professional Certificate
Languages
- Portuguese (native)
- English (advanced)
Services
- SaaS and web MVPs
- Android and iOS mobile apps
- Automations and integrations with n8n and APIs
- Migration from Bubble to custom code
- Requirements, prototypes and documentation