Open to new projects

Hi, I'mGabriel Sanz

Full Stack Developer

.NET · React / Next.js · Mobile with Expo

I build systems from database to deploy: mission-critical financial modules for the Mato Grosso do Sul state government, SaaS products at WPGHub and apps on the stores.

Campo Grande, MS — Brasil

Download resume Get in touch

years as a developer: 4+; years as a developer
systems in production: 10; systems in production
apps on the stores: 2; apps on the stores

// projetos

Projects

Products I built that are live.

2026App StoreGoogle Play
iStatusPay · Admin: visual home-page editor (GrapesJS)
1/3
iStatusPay
Payments platform — web and store-published app
Full rewrite of a legacy WordPress platform into a custom architecture, running in production on the client's server.
- .NET 10 Clean Architecture API with MediatR, FluentValidation and rotating refresh-token JWT
- Next.js 16 / React 19 dashboard with a page builder (GrapesJS)
- React Native (Expo) app published on the App Store and Google Play
- CI/CD with Azure Pipelines and a self-hosted agent on the client's server
- .NET 10
- MediatR
- EF Core
- MySQL 8.4
- Redis
- MinIO
- QuestPDF
- Next.js 16
- React Native
- Expo
- Docker
- Azure Pipelines
Visit site App Store Google Play
2026App Store
MamaBaby · Home: time since last feeding and quick log
1/6
MamaBaby
Baby journal with real-time sync
Baby routine tracker — feedings, sleep, diapers and symptoms — with pediatrician reports and LGPD (Brazilian GDPR) compliance.
- Cross-device sync via SignalR: the timer keeps running on the other phone
- iOS Live Activity with a feeding timer and push notifications
- Published on the App Store; Next.js PWA web version
- .NET 10
- PostgreSQL
- SignalR
- Expo
- React Native
- Next.js 15
- TypeScript
- Docker
Visit site App Store
2026
AureControl · Contracts Kanban by lifecycle stage
1/6
AureControl
SaaS for contracts, billing and contractor management
Platform with access roles (admin, finance, manager, legal, staff), contract generation and signing, financial dashboards and notifications.
- Migrated from Supabase to a custom .NET 10 API without downtime
- TOTP 2FA, Web Push and real-time updates with SignalR
- PWA with React Query, Sentry monitoring and Vitest tests
- .NET 10
- EF Core 10
- PostgreSQL
- Redis
- MinIO
- SignalR
- React 18
- TypeScript
- Tailwind
- shadcn/ui
- Sentry
Visit site
2026
Escalium · Monthly 12x36 schedule with drag-and-drop
1/8
Escalium
Hospital shift and on-call scheduling
Schedules, shift swaps, coverage and absences with granular permissions, an interactive calendar and exportable reports.
- Passwordless login with passkeys (WebAuthn / FIDO2)
- Built-in AI assistant via Groq (Llama 3.3 70B)
- Drag-and-drop scheduling (dnd-kit) and installable PWA
- .NET 10
- PostgreSQL
- Redis
- MinIO
- WebAuthn
- Groq
- React
- shadcn/ui
- PWA
Visit site
2026
SlotSync · Clinic dashboard and fee-adjustment reminders
1/6
SlotSync
Practice management for psychology clinics
Patients, scheduling, digital records and finance, with automatic WhatsApp reminders.
- .NET 10 Clean Architecture with MediatR, OpenTelemetry and Scalar docs
- Next.js 15 / React 19 / Tailwind 4 front-end tested with Vitest and MSW
- WhatsApp integration (Evolution API) shared across products
- .NET 10
- MediatR
- PostgreSQL
- Redis
- SignalR
- OpenTelemetry
- Next.js 15
- Tailwind 4
- Vitest
Visit site
2026
Sudoku Arena · Classic game with notes and timer
1/7
Sudoku Arena
Gamified, ad-free Sudoku with a global ranking
Classic and Killer modes with a custom TypeScript puzzle generator, global ranking and match history.
- Expo SDK 57 / React Native 0.86 / React 19.2 app
- .NET 10 Minimal APIs backend with PostgreSQL and JWT
- Web version exported from the same app
- Expo
- React Native
- TypeScript
- .NET 10
- Minimal APIs
- PostgreSQL
- EAS
Visit site
2026
Atalaia Tintas · Point of sale with cart, customer and PIX payment
1/6
Atalaia Tintas
Sales and back-office for a paint store
Microservice-based sales system with an API gateway and company, core and tax modules.
- .NET 9 microservices with a YARP gateway and OpenTelemetry
- Angular 20 + Tailwind 4 with Playwright E2E tests
- .NET 9
- YARP
- MediatR
- PostgreSQL
- Redis
- Angular 20
- Tailwind 4
- Playwright
Visit site
2026
Nobel Rigor · Rentals: list, filters and new rental
1/3
Nobel Rigor
Menswear rental and sales
Date-based inventory, fittings, pickups and returns, finance and a public catalog.
- Help videos generated automatically with Playwright
- Next.js 15
- React 19
- Tailwind 4
- TypeScript
- Playwright
Visit site
2026
WPGHub
Website of the software house I co-founded
Landing page with an interactive 3D scene, animations and smooth scrolling.
- Three.js / React Three Fiber, Framer Motion and Lenis
- Next.js 16
- React 19
- Three.js
- React Three Fiber
- Framer Motion
- Tailwind 4
Visit site
2025
FormsMenu · Visual form designer
1/6
FormsMenu
Dynamic form engine with menus and permissions
Forms rendered from JSON schemas, hierarchical menus served by the back-end, versioning and auditing.
- ASP.NET Core 8 API with RBAC, FluentValidation and public Swagger
- .NET 8
- EF Core
- MySQL
- React 19
- Vite
- MUI
- Docker
Visit site API

Lab

Study projects this site grew out of. They run in the member area.

Open member area

Personal Finance
Cards, categories, transactions and installments with a dashboard.
.NET 8 · React · MySQL · JWT
Card Game
API that consumes a deck-of-cards service and compares hands.
.NET 8 · Angular 19 · xUnit
GitHub
Pokémon Cards
Collection tracker with images stored in MinIO.
.NET 8 · React · MinIO
Books
Study CRUD with a versioned API and HATEOAS.
.NET 8 · React · HATEOAS

// software house

WPGHub

In 2026 I co-founded WPGHub, a software house in Campo Grande, with Pedro Henrique and Walace Oliveira. Many of the projects above started there: I lead product and full stack development.

Visit WPGHub

// experiencia

Experience

From environmental engineer to full stack developer.

Co-founder · Product & Full Stack · WPGHub
2026 — present
Software house co-founded with two partners. I shape the products and work on every stage, from idea to deploy.
- Web and mobile products in production for clients and in-house, on shared self-hosted infrastructure
- Migrated Supabase/Lovable prototypes to custom .NET 10 APIs (AureControl, Escalium, SlotSync, MamaBaby)
- Standardized CI/CD on Azure Pipelines with self-hosted agents and idempotent provisioning scripts
- Apps shipped to the App Store and Google Play with EAS and TestFlight
.NET 10 · Next.js · Expo · PostgreSQL · Redis · MinIO · Docker · Portainer · Azure Pipelines
Software Developer · Infortech Tecnologias
Jan 2025 — present
Systems for the State Government of Mato Grosso do Sul, Brazil.
- SIAFIC (2026): Public Debt, Consortia and Receivables modules, with .NET 9, Angular 21 and PrimeNG
- Papyrus: front-end of the government digital-services platform in Next.js, built from Figma prototypes
- Signer module: digital signatures with organizations, roles, approvals and invites (.NET 10, FastEndpoints, Lacuna RestPKI)
- Orchestrator API across government systems (TransfereMS) with Polly and k6 load tests
.NET 9 · .NET 10 · FastEndpoints · Angular 21 · PrimeNG · Next.js · TypeScript · SQL Server · Azure DevOps
Software Developer · Infortech Tecnologias
Mar 2022 — Jan 2025
SPF — the Mato Grosso do Sul state Planning and Finance System, used by 100+ government units. Promoted 3 times in under 2 years.
- Built legally required fiscal reports (RREO, RGF, LDO, LOA…) end to end, from database to UI
- EFD-REINF integration with the Federal Revenue Service and Transparency Portal APIs
- 1,500+ tasks and 50+ production database scripts; mentored junior developers
C# · ASP.NET MVC · Entity Framework · SQL Server · JasperReports · jQuery
Sanitary & Environmental Engineer · Consultor autônomo
2016 — 2021
Environmental licensing as an independent consultant before moving into software. Internships at FUNASA and Campo Grande City Hall.

// stack

Stack

What I use day to day.

Backend

C# / .NET 10
ASP.NET Core
Minimal APIs
FastEndpoints
EF Core
Clean Architecture / DDD
MediatR
FluentValidation
SignalR
Hangfire
YARP
OpenTelemetry
Serilog
Node.js

Frontend

React 19
Next.js 16
TypeScript
Angular 21
Tailwind CSS 4
shadcn/ui
PrimeNG / PrimeReact
TanStack Query
Zustand
Zod
Three.js
PWA

Mobile

React Native
Expo
EAS Build / Submit
App Store / TestFlight
Google Play
Push
Live Activities
RevenueCat

Data

SQL Server
PostgreSQL
MySQL
MongoDB
Redis
MinIO / S3
RabbitMQ
Supabase

DevOps & Infra

Docker
Azure DevOps / Pipelines
Portainer
Nginx / NPM
Linux (Ubuntu)
GitHub
n8n

AI

Claude Code
MCP
Groq
OpenAI API

Quality

xUnit
Moq
Vitest
Testing Library
Playwright
k6
Scrum / Kanban

Education

Postgraduate in Software Engineering · UCDB2022
Software Factory Program · Senac2022
Postgraduate in Occupational Safety Engineering · UNIDERP2019
B.Sc. Sanitary & Environmental Engineering · UCDB2016

Certifications

AI-900 · Azure AI Fundamentals · Microsoft2024
DP-900 · Azure Data Fundamentals · Microsoft2024
API RESTful com Azure · Udemy2025
Arquitetura de Sistemas e Cloud Computing · Senac MS2022
Cybersecurity Essentials · Cisco2021

// contato

Contact

Got a project, a role or just want to chat? Send me a message.

Or email me at

eng.gabrielsanz@hotmail.com

Hi, I'mGabriel Sanz

iStatusPay

MamaBaby

AureControl

Escalium

SlotSync

Sudoku Arena

Atalaia Tintas

Nobel Rigor

WPGHub

FormsMenu

Lab

WPGHub

Co-founder · Product & Full Stack · WPGHub

Software Developer · Infortech Tecnologias

Software Developer · Infortech Tecnologias

Sanitary & Environmental Engineer · Consultor autônomo

Backend

Frontend

Mobile

Data

DevOps & Infra

AI

Quality

Education

Certifications