01App2026
FIInvest
Brazilian real estate fund portfolios with holdings, distribution history and dividend projections.
- React Native
- Expo
- TypeScript
- RevenueCat
View case studyIn production
Portfolio · 2026
Elton Santos, Software Engineer and Full Stack Developer
- React
- React Native
- TypeScript
- Node.js
- Java
- Python
- AI
- Next.js
- Tailwind CSS
- Ruby on Rails
For over 10 years I have been building software for web and mobile, from enterprise platforms to my own products published on Google Play and the App Store. I work across every stage: architecture, development, integrations, security, release and ongoing work in production.
- Experience
- 10+
- Personal projects
- 17
- Published apps
- 07
- Based in
- Portugal · Brazil · Remote
01About
Software engineering from problem to production.
For over 10 years I have worked in software development and systems analysis. I currently take part in evolving government platforms in Portugal with C#, Java, React and Node.js, along with accessibility, application modernization and identity and access management with Microsoft Entra ID.
I have also been the technical lead of an investment platform for the MENA market, covering web and mobile apps, KYC and MFA integrations, Python services and event processing with Kafka.
Alongside that, I build my own products for web, Android and iOS. In them I own the full cycle: architecture, development, database, integrations, release, monetization and maintenance.
- Applied AI
- I bring computer vision and language models into real products, with structured responses, data validation and fallback paths for when the AI or the connection fails.
- End-to-end experience
- Work on enterprise projects and on my own products, from defining the architecture to release and maintenance in production.
- Engineering and security
- Typed code, access rules enforced at the right layers and architecture decisions made to keep maintenance, evolution and auditing straightforward.
02Projects
Products and systems I have built.
Apps, SaaS platforms and digital products I have developed from architecture to production.
02App2026
Imóvel Gestor
Property records, inspections and financial tracking on mobile, with a companion web application.
- React Native
- Expo
- TypeScript
- Supabase
- RevenueCat
View case studyIn production
03App2026
Coz.IA
Recipes based on available ingredients, with photo recognition and cooking instructions.
- React Native
- Expo
- TypeScript
- Supabase
- OpenAI
- Google Cloud Vision
- +1
View case studyIn production
04SaaS2026
ESData
Organization management with configurable modules, separate customer data and role-based access.
- Next.js
- TypeScript
- Supabase
- PostgreSQL
View case studyIn production
03Specialties
Areas I work in.
Technologies and practices I use in my own products and in professional systems running in production.
Applied AI
01Integrating language models, computer vision and intelligent automation into real products, with response validation, context retrieval and failure handling.
- OpenAI API
- Google Cloud Vision
- RAG
- Structured responses
- Risk and fraud scoring
- KYC automation
Frontend
02Responsive, typed and accessible web interfaces, including public applications with WCAG compliance requirements.
- React
- Next.js
- TypeScript
- JavaScript
- Tailwind CSS
- Astro
- Accessibility (WCAG)
Mobile
03Android and iOS apps built with React Native and Expo, including store releases, subscriptions and premium features.
- React Native
- Expo
- EAS Build
- Android
- iOS
- RevenueCat
Backend
04APIs, business rules and integration services built on different stacks, from enterprise systems to my own products.
- Node.js
- NestJS
- Java
- C# / .NET
- Python
- FastAPI
Data and integrations
05Relational modeling, authentication, messaging, external integrations and data access policies.
- PostgreSQL
- Supabase
- Prisma
- Firebase
- Kafka
- REST / GraphQL
Cloud, DevOps and security
06Deployment, CI/CD, cloud infrastructure, identity and access, automated testing and security practices across the development lifecycle.
- Docker
- CI/CD
- AWS
- GCP
- Azure / Entra ID
- Vercel
- RBAC and MFA
- Automated testing
04Career
Professional experience.
Teams, enterprise projects and systems in production.
2026 – PresentCurrent
LBC · via WireIT
Full-Stack Developer · Remote, Lisbon, Portugal
- C#
- Java
- React
- Node.js
- Azure Entra ID
- Power BI
2025 – 2026
Revenya · via PrimeIT
Tech Lead · Porto, Portugal
- Next.js
- NestJS
- React Native
- PostgreSQL
- Prisma
- Python
- FastAPI
- Kafka
- AWS
2025
AICEP · via PrimeIT
IT Consultant / Full-Stack Developer · Lisbon, Portugal
- React
- .NET Core
- GraphQL
- GCP
- Docker
- Kubernetes
2024
Cresce Vendas
Full-Stack Developer · Remote, Fortaleza, Brazil
- Ruby on Rails
- React
- RSpec
- Jest
2022 – 2024
IntraPoint AS
Systems Analyst · Remote, Norway and Brazil
- Python
- PHP
- Node.js
- MongoDB
- PostgreSQL
2021 – 2022
Controladoria Geral do Estado (CGE)
Systems Analyst · Ceará, Brazil
- Ruby on Rails
- React
05Articles
Notes on engineering and product.
Notes on software engineering, architecture, products and the decisions that come up during development.
AstroTypeScript
Why I chose Astro for my portfolio
The decision to rebuild my portfolio in Astro, with Markdown as the source of truth and React only where there is real interactivity.
Read article06Contact
Let's talk.
I am open to opportunities and collaborations in software engineering, especially web, mobile and products with applied AI. You can reach me by email, LinkedIn or GitHub.
eltonaxl@hotmail.com