From paper
to product.
Custom software for your operation.
You show up with the idea, the stalled project, or the system that no longer keeps up with the business. I understand the problem, design the solution and ship it working, with you following every step.
Cezar Pretto · software engineer · partner and Lead Software Engineer at Gupy
Whoever hires, hires a person.
You talk directly to the person who designs and builds the system, from the first draft through delivery and after it.
- who
- senior engineer, from design to deploy
- how
- in stages, you follow each one
- quality
- tests and review on every delivery
Clarity
Complexity becomes clear code and a conversation without jargon.
Delivery
An idea on paper becomes a running product, with quality you can verify.
Partnership
The stance of someone who builds with you, not a vendor who disappears after delivery.
Cases
Products I built end-to-end as tech lead and founder. Each one shows the problem, the decisions and the outcome.
Experience
Built by someone who has run product at scale, done consulting and helped other leaders grow.
2021 — Present
Gupy
Partner & Lead Software Engineer
Partner on the technical track: ownership of architecture, critical technical decisions, and product strategy across solutions impacting thousands of companies and candidates in digital HR.
2025 — Present
Tech Leads Club
Member
Brazilian community focused on career development, technical leadership, and high-performance software engineering. Weekly classes, advanced courses, mentoring, and practical experience exchanges among technical leaders.
2018 — 2021
Super Simples
Software Engineer
Development of solutions to simplify accounting and tax management for small businesses, focusing on scalable web products.
2013 — 2021
Planos Assessoria
Systems Analyst
Consulting and systems analysis, supporting clients in structuring processes and technology solutions.
Stack
What I use day to day to deliver with quality.
frontend
- React
- Next.js
- TypeScript
- Tailwind CSS
- Vite
- Ant Design
- Zustand
backend & cloud
- Node.js
- NestJS
- Express
- PostgreSQL
- MongoDB
- Sequelize
- Docker
data & devops
- GitHub Actions
- CapRover
- Cloudflare R2
- Pino
- New Relic
- Graphile Worker
practices
- DDD
- Clean Architecture
- TDD
- Modular Monolith
- Spec-Driven Development
- Mentoria
Got a project on paper? Let's get it off.
Tell me the problem, even if it is still a draft. I also talk about opportunities, mentoring and podcasts.