Brazil · 12+ years · Open to international remote opportunities
I design and modernize multi-tenant platforms across healthcare, payments, insurance, and ERP. My work connects architecture, secure APIs, data performance, web and mobile experiences, and reliable cloud delivery.
Explore my interactive portfolio →
New, standalone portfolio demonstrations with architecture notes, runnable source, and automated tests:
| Project | Engineering focus | Validation |
|---|---|---|
| TenantFlow · C# / .NET 10 API | Tenant isolation, durable idempotency, ETags, transactional outbox, Azure Service Bus adapter | 6 integration tests passed locally |
| DeliveryBoard · C# / Blazor web | Evidence-based release gates, pure domain policy, durable revisions and stale-edit protection | 17 tests passed locally; browser save/reload checked |
| TenantFlow companion · Flutter · Live demo | Typed API client, explicit demo mode, request identity and concurrency feedback | 10 tests passed; clean analysis; release web build |
The Flutter project is a new demonstration. Professional mobile experience below is .NET MAUI and Xamarin.Forms. Blazor is used for web. The Azure adapter compiles; no Azure cloud deployment is claimed for these samples.
Zoobook Systems LLC · Principal C# / .NET Full-Stack Engineer
United States, remote · March 2024 - September 2026 · Contract completed after successful launch
- Architected multi-tenant behavioral-health EHR capabilities across clinical documentation, scheduling, provider, billing, claims, and reporting; standardized tenant-aware authorization, configuration, data access, and caching.
- Led incremental modernization to .NET 8 and .NET 10. Async processing, EF Core/LINQ, SQL tuning, and caching improved selected workflow response times by about 30%.
- Built REST and GraphQL layers with schemas, resolvers, filtering, pagination, validation, and authorization.
- Delivered reusable React/TypeScript and Blazor interfaces and .NET MAUI clinician/operations workflows with secure API access, offline-aware handling, and shared domain logic.
- Implemented AWS patterns with ECS/Fargate, RDS, S3, CloudWatch, IAM, and Secrets Manager. Docker CI/CD and xUnit/Moq automation reduced manual release activity by about 40%.
Zūm Rails · Senior .NET Full-Stack Engineer
Montréal, Canada, remote · January 2021 - December 2023
- Engineered payment services spanning U.S. ACH aligned with NACHA rules, Canadian EFT, initiation, settlement, reconciliation, refunds, accounts, and transaction status.
- Connected Angular/TypeScript operations interfaces to ASP.NET Core APIs; designed idempotency, validation, retry, and webhook/event handling.
- Implemented Azure App Service, Functions, Service Bus, Blob Storage, Key Vault, and Azure SQL with Azure DevOps pipelines for repeatable multi-environment delivery.
- Improved selected transaction-heavy response times by about 25% through async processing, query tuning, fewer requests, and targeted caching.
i4Pro · Staff C# Backend Engineer
Promoted from C# / .NET Full-Stack Engineer · São Paulo, Brazil · June 2016 - December 2020
- Led technical design and mentored engineers through architecture discussions, code/design reviews, and root-cause debugging across policy and claims modules.
- Delivered quotation, issuance, endorsement, claims, customer, financial, and reporting capabilities with C#, Angular, Entity Framework, and SQL Server.
- Automated selected claims validation/routing workflows to reduce manual handling by about 25%; SQL optimization reduced selected report processing time by about 35%.
- Supported Xamarin.Forms field/claims capabilities with shared validation and API integration logic.
TOTVS · Software Engineer
Belo Horizonte, Brazil · January 2014 - May 2016
Built financial, accounting, administrative, and operational capabilities for TOTVS RM. Refactored reusable C#/Entity Framework components, integrated REST/SOAP services and JavaScript/jQuery interfaces, and improved selected search/report/export operations by about 20% through targeted SQL optimization.
Professional outcomes above come from my résumé and refer to selected workflows, not platform-wide benchmarks. Employer systems are separate from the public sample repositories.
Platform: C# · .NET 10/8/6 · .NET Core/Framework · ASP.NET Core · Web API/MVC · EF Core/EF · LINQ
Web: React · Angular · Blazor · TypeScript · JavaScript · HTML/CSS · Bootstrap
Mobile: .NET MAUI · Xamarin.Forms
Data: SQL Server · PostgreSQL · MySQL · Redis
Architecture: REST · GraphQL · microservices · event-driven systems · multi-tenancy · Clean Architecture · SOLID
Azure: App Service · Functions · Service Bus · Blob Storage · Key Vault · Azure SQL
AWS: ECS/Fargate · EC2 · Lambda · S3 · RDS · CloudWatch · IAM · Secrets Manager
Delivery & quality: Docker · Azure DevOps · GitHub Actions · CI/CD · xUnit · NUnit · Moq · Swagger/OpenAPI · Postman
- .NET Docker, Kubernetes & SpecFlow — application, container, deployment configuration, and behavior scenarios.
- Git author investigation guide — author-focused file history, diffs, and review material across PowerShell, CMD, and Bash.
- Docker CLI - Swarm service-update mount ordering to prevent false deployment drift.
- StellarGate - settlement verification, webhook retry safety, Horizon URL handling, and dashboard API integration.
- Fluxora Backend - pnpm toolchain consistency and Docker runtime improvements.
- Vero Core Engine - LRU cache bounds after asynchronous revalidation.
- EcoTask Backend - verification escalation when no community validators were available.
- StellarEduPay - backend startup and conflicting authentication imports.
- Stellar Kraal Contract - GitHub Actions dependencies pinned to immutable commit SHAs.
- Stenion - a public coverage API endpoint.
FAAP, Faculty of Computing and Informatics
Master's degree in Computer Science, 2012 - 2014
Bachelor's degree in Computer Science, 2009 - 2012