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Working from a galaxy far far away
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Working from a galaxy far far away
11 followers · 10 following

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Achievements

Achievement: Pair Extraordinairex2Achievement: QuickdrawAchievement: YOLOAchievement: Pull Sharkx2Achievement: Arctic Code Vault Contributor

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jonathanperis/README.md 
> "A Vinganca nunca e plena, mata a alma e a envenena." - Seu Madruga

var jonathan = new Developer
{
    Location  = "Itanhaem, SP, Brazil",
    Company   = "Peris Studio",
    Focus     = new[] { "Microservices", "Clean Architecture", "Performance Engineering" },
    Languages = new[] { "C#", "Go", "Rust", "Python", "TypeScript", "C" },
    Hobbies   = new[] { "Game Dev", "Load Testing Everything", "Proving .NET Is Fast" }
};

$ whoami

Software engineer focused on backend systems, benchmarking, and low-level game work. I build services, measure them, and then rebuild them in other languages to compare the results.

I keep the stack centered on .NET, but I also use Go, Rust, Python, TypeScript/ReactLynx, and C/SDL2 for projects that fit those tools better.

$ ls ~/projects --sort=stars

cpnucleo ★ 8
Production-grade .NET 9 microservices reference architecture
Clean Architecture CQRS DDD gRPC FastEndpoints Blazor WASM Native AOT Docker PostgreSQL OpenTelemetry

blazor-mudblazor-starter ★ 1
Blazor Server starter template with MudBlazor, multi-arch Docker, AOT + trimming
MudBlazor 8.3 .NET 9 Azure deployment CI/CD

speedy-bird-lynx
Cross-platform side scroller built with ReactLynx and TypeScript
ReactLynx TypeScript 2D game cross-platform

super-mango-game
Classic 2D side-scrolling platformer in pure C + SDL2, playable in the browser via WebAssembly
32 render layers delta-time physics gamepad support parallax scrolling Emscripten pixel art

rinha2-back-end-dotnet ★ 3
Rinha de Backend challenge -- ASP.NET 9, Native AOT, 60% less RAM than allowed
< 800ms responses 250MB RAM ceiling PostgreSQL stored functions Npgsql multiplexing

rinha2-back-end-go
Rinha de Backend implementation in Go, kept to a compact single-file service at ~190 lines
chi router pgx single-file compact

rinha2-back-end-python
Rinha de Backend implementation in Python for the same transaction workload
Python HTTP API database-backed benchmarking

rinha2-back-end-rust
Rinha de Backend implementation in Rust, ~140 lines and backed by Actix-web
Actix-web Tokio SQLx single-file

rinha2-back-end-k6
Shared stress test suite for all Rinha implementations -- k6 + InfluxDB + Grafana dashboards
load testing HTML reports custom xk6 binary

jonathanperis.github.io
Portfolio site with a dark terminal aesthetic, Konami code easter egg, and a fake terminal
Next.js 16 React 19 TypeScript Tailwind CSS v4 portfolio

$ cat /proc/tech_stack

+-----------------------+--------------------------------------------------+
| Backend               | .NET 9, ASP.NET, FastEndpoints, gRPC, EF Core,  |
|                       | Dapper, Native AOT                               |
| Systems               | Go (chi, pgx), Rust (Actix-web, Tokio, SQLx),   |
|                       | C (SDL2, Emscripten/WASM)                        |
| Frontend              | Blazor WASM, React 19, ReactLynx, Next.js 16,    |
|                       | TypeScript, Tailwind CSS, MudBlazor              |
| Infrastructure        | Docker, Nginx, PostgreSQL, GitHub Actions        |
| Observability         | OpenTelemetry, Grafana, InfluxDB, k6             |
| Architecture          | Clean Architecture, CQRS, DDD, Microservices     |
+-----------------------+--------------------------------------------------+

$ cat benchmarks.md

The Rinha de Backend challenge requires handling concurrent credit/debit transactions across 2 API instances behind Nginx, all within 550MB total and every response under 800ms.

Implementation Language LOC Notable characteristics
.NET 9 + Native AOT C# ~200 Native AOT + perfect score
Go Go ~190 Single-file service
Python Python ~150 Same API contract, compact implementation
Rust + Actix-web Rust ~140 Single-file service + Actix-web

All implementations share the same PostgreSQL stored procedures, Nginx config, and k6 stress test suite.

$ neofetch

   jonathan@peris-studio
   ----------------------
   OS:        macOS / Linux / Docker
   Shell:     zsh + dotfiles
   Editor:    VS Code + JetBrains
   Uptime:    coding since 2015
   Repos:     10 active, 0 abandoned
   Packages:  NuGet, npm, Cargo, pip
   Theme:     Dark Terminal Aesthetic

   Contact:   [email protected]
   Portfolio: https://jonathanperis.github.io/
   Twitter:   @jperis_silva
github-snake

Read the Wiki for architecture notes, performance benchmarks, tech stack details, and every project listed above.

hint: visit jonathanperis.github.io and try the Konami code

Pinned Loading

  1. cpnucleo cpnucleo Public

    Production-grade .NET 9 microservices reference architecture — Clean Architecture, CQRS, DDD, Docker, and full test coverage

    C# 8 7

  2. super-mango-game super-mango-game Public

    Classic 2D side-scrolling platformer built with C and SDL2 — playable in the browser via WebAssembly

    C

  3. rinha2-back-end-dotnet rinha2-back-end-dotnet Public

    High-performance backend for the Rinha de Backend challenge — built with ASP.NET 9, PostgreSQL, Nginx, Native AOT, and Docker

    HTML 3 1

  4. rinha2-back-end-go rinha2-back-end-go Public

    High-performance backend for the Rinha de Backend challenge — built with Go, PostgreSQL, Nginx, and Docker

    PLpgSQL 1

  5. blazor-mudblazor-starter blazor-mudblazor-starter Public

    Blazor Server starter template with MudBlazor Material Design components, .NET 9, Docker, and Azure deployment

    HTML 1

  6. speedy-bird-lynx speedy-bird-lynx Public

    Speedy Bird — a Flappy Bird clone built with Lynx (ReactLynx + TypeScript). Cross-platform native UI for iOS, Android, and Web from a single codebase.

    TypeScript