Software Engineer / Backend & Full-stack
Five years turning ambiguous requirements into reliable systems: Rust and .NET services, Angular interfaces, and the infrastructure that keeps them honest.
Currently at FSI Services and Apache DataFusion.
Background
Selected work
Six systems, from enterprise platforms to developer tools. Each one shipped, reviewed, and used.
Feature delivery and platform work on a CMMS used to manage buildings, assets, work orders, and documents. Angular and .NET on the surface; SQL Server, Azure, and CI/CD underneath.
Brought six repositories under one delivery standard and helped ship feature flags with audit and role-based access.
Angular, .NET, C#, SQL Server, Azure, Azure DevOps
Enterprise / private
A typed Rust SDK and CLI covering orders, payments, checkout, subscriptions, OAuth2, mTLS certificates, and webhooks. A single binary, JSON when you need it, tables when you do not.
Dozens of endpoints under one interface, packaged for crates.io, Homebrew, AUR, DEB, and RPM.
Rust, Tokio, reqwest, serde, clap, OAuth2, mTLS
View on GitHubAngular 22 and Go on a 1 vCPU / 6 GB server: 16 lazy routes, an AI tutor that can act on the study plan, timed exams, flashcards, and progress analytics.
A complete product with typed contracts, real data, and a 15 MB Go binary. No mock fallbacks in production.
Angular, Signals, Go, PostgreSQL, Docker, AI, ARM
Private product
Moved a one-year NestJS/TypeScript codebase to .NET 10 with Clean Architecture, DDD, and CQRS. Added PagBank payments, WhatsApp notifications, and guest registration.
A strongly typed domain and maintainable boundaries without pausing the product.
.NET 10, C#, Clean Architecture, DDD, CQRS, PostgreSQL, PagBank, WhatsApp
Client / private
A Rust TUI that captures system audio, transcribes locally with Whisper.cpp, detects speech with VAD, and sends only the question to an AI model.
Speech never leaves the machine unless you choose to send it. Models from tiny to large-v3.
Rust, Whisper.cpp, VAD, TUI, AI
View on GitHubRust/Axum and Angular for private clinics: Keycloak OIDC with MFA, PostgreSQL row-level security, field encryption, and audit on every access.
Deny-by-default authorization, no real patient data in development, and a feature-flagged ASR experiment with no persistence. Deployed with Docker, GHCR, and Coolify.
Rust, Axum, Angular, PostgreSQL, Keycloak, LGPD, Coolify
Private product
Experience
Five years across product companies, an enterprise platform team, and independent work.
FSI Services (Jalasoft)
Angular, .NET, C#, SQL Server, Azure, Azure DevOps, Bicep, YAML
Black River Code
.NET, C#, NestJS, TypeScript, Rust, Vue, Angular, PostgreSQL, MongoDB, Redis, Docker, Cloudflare
Grupo Referencial
Requirements analysis, software design, SQL, business systems
More work
A broader index of products, client work, open source, and academic systems.
Client and message management for a farrier, with media storage and DNS on Cloudflare.
Rust, Axum, Vue, Cloudflare R2
Client / private
Event and route management for rally organizers, with audit logs and WhatsApp integration.
NestJS, PostgreSQL, MongoDB, Redis, Docker, Scalar
Client / private
Restaurant menu management as a modular monolith with per-module permissions.
.NET 8, EF Core, PostgreSQL
Client / private
Martial arts academy backend with CQRS, payments, and Firebase auth.
.NET 9, MediatR, EF Core, PagBank
Client / private
Open-source study platform for ENEM with a Rust API and Angular frontend.
Rust, Axum, Angular, PostgreSQL
Open source
Audio upload and processing API with a clean architecture split and an Angular client.
.NET 10, Angular, PostgreSQL
Academic
Microservices architecture for comic collections, documented with C4 and ADRs.
Java, Docker, AWS S3, OAuth
Academic
Android fitness app with Supabase and Firebase.
Kotlin, Android, Supabase, Firebase
Academic
Community question-and-answer platform concept for Jala University.
Product design, architecture, documentation
Academic
Digital Uno card game built with Jonathan, with single-player and multiplayer modes.
TypeScript, Electron, React
Academic
Classic Space Invaders clone with player movement, enemy waves, projectiles, and collision detection.
C#, MonoGame
Academic
Vehicle sales and rental platform with advanced search, filters, and listing management.
Next.js, Node.js, PostgreSQL
Academic
Contributor to the Apache DataFusion Rust query engine. Upstream PRs: column-specific Parquet encoding validation, NULL nested-type literal unparsing, and shared buffer accounting.
Rust, Apache Arrow, Parquet, SQL
Open source
Contributor to Horizon, a Rust reimplementation of Minecraft Java Edition. Open PR for shader pack image sizes and dropped program state.
Rust, wgpu, shaders
Open source
Toolbox
The tools I reach for, grouped by the problem they solve.
Rust, C#, TypeScript, Go, Java, Kotlin, SQL, Python
.NET / ASP.NET Core, Axum, NestJS, Spring Boot, REST, Clean Architecture, DDD, CQRS, microservices, event-driven systems
PostgreSQL, SQL Server, MongoDB, Redis, EF Core, SQLx, pgx
Angular (Signals, zoneless), Vue, React, TypeScript, SCSS
Azure (App Configuration, Entra ID, App Insights), AWS, Cloudflare (Pages, R2, DNS), Docker, Kubernetes, Terraform, Coolify, Azure DevOps, GitHub Actions, GitLab CI, Bicep, Linux
Unit and integration tests, API contract tests, code review, ADRs, C4, observability
How I work
I started as a systems analyst, learned to read a business before writing code, and never lost the habit. Today I work across the stack, but the questions are the same: where does the source of truth live, what happens when this fails, and how would we know?
A clear interface between modules is worth more than a clever shortcut inside one.
A fix is not done when the symptom disappears. It is done when the behavior is pinned down.
Predictable deployments, readable code, and systems that do not need a hero at 2 a.m.
A symptom disappearing is not the same as a problem solved.
Education and honors
Jala University / Concentration in Design and Architecture
Coursework: software architecture, distributed systems, cloud, data science, UI/UX, and mobile development. English-medium program.
Dean's List, Term 1, 2023. Jala University.
Portuguese (native), English (professional, C1-C2), Spanish (intermediate).
Contact
I'm open to backend and full-stack roles, remote or in Brazil. If you have a system that needs to hold up, I'd like to hear about it.