Independent product · live
Cartteira
Personal finance management to organize expenses, cards, and installments, with smart features that make everyday tasks easier.
Go · React · Inteligência artificial
SOFTWARE ENGINEER · ENGINEERING LEADER
Engineering, architecture, and business insight to turn ideas into real solutions.
I'm José Paiva, a software engineer with over 10 years of experience building digital products, integrating systems, and solving complex challenges.
From idea to architecture. From architecture to product.
- 01BusinessContext, constraints, goals
- 02ArchitectureDecisions, boundaries, trade-offs
- 03EngineeringCode, integrations, delivery
- 04ProductContinuous evolution
Beyond the code
I like to understand the problem before choosing the technology.
I'm a software engineer with over 10 years of experience building applications, integrations, and digital platforms.
My career started in full-stack development and grew into architecture, technical leadership, and engineering management. That experience changed how I see software: not just as code, but as a tool to solve real needs.
I stay close to technology, taking part in technical decisions and building my own products, such as Cartteira and AgendaZap.
Today I combine engineering, architecture, and business insight to help create and evolve digital solutions.
- 01Full-stack development
- 02Senior engineering
- 03Technical leadership
- 04Engineering management
Selected work
Projects that connect technology and results.
From building my own products to evolving corporate platforms, every project combines business decisions, architecture, and engineering.
Professional work · anonymized case
One platform, multiple markets.
Evolving an affiliate platform for international operations, with multiple currencies and distinct business rules.
Independent product · live
AgendaZap
Scheduling, a public booking page, and automatic reminders for professionals and businesses.
Connecting platforms, data, and decisions.Integrations with CRM and advertising platforms, APIs, webhooks, and events.Professional work · anonymizedEngineering built to operate at scale.Workers, asynchronous processing, reliability, and observability.Professional work · anonymized
Earlier work:BPI Imóveis ↗BPI Fazendas ↗Vanderlei Despachante ↗Quadra Construtora ↗Agência Y2 ↗
My approach
Technology starts with a good question.
Before choosing tools or writing code, I try to understand the problem, its constraints, and the goals the solution has to meet.
Understand the business
Problem, constraints, and goals before any tool.
Define the architecture
Explicit decisions and trade-offs, sized to the problem.
Build the solution
Incremental delivery, with clear code that is easy to maintain.
Follow and evolve
Watch real usage and adjust course based on it.
Expertise
From the first version to evolving complex systems.
I work on one-off projects and ongoing collaborations, combining software development, architecture, and an understanding of business needs.
Digital products and SaaS
Web applications, MVPs, platforms, and custom solutions.
Cartteira · AgendaZap
Corporate platforms
Integrations and automation
APIs, webhooks, communication between platforms, and process automation.
Integrations case
AgendaZap
Architecture and cloud
System evolution, distributed processing, infrastructure, and architectural decisions.
Processing case
Distributed systems
Technical and product consulting
Support with technical decisions, architecture, solution planning, and product evolution.
Technical leadership
Engineering management
Contact
Good ideas deserve good solutions.
Have a product in mind, a technical challenge, or a platform that needs to evolve? Let's talk and see how I can contribute.
The best way to reach me is a message on LinkedIn or GitHub.