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kill74/README.md 
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Typing SVG

Rust backend/systems developer open to contract work. Async Rust, WebSocket systems, SQLite persistence, CI/release automation, and security-minded protocol work.

Portfolio GitHub LinkedIn Email

Profile views


> whoami

┌─[guilherme@kill74]─[~]
└──╼ $ cat /etc/profile.d/me.conf

  handle      →  kill74
  name        →  Guilherme
  location    →  Castelo Branco, Portugal 🇵🇹
  age         →  20

  education   →  B.Sc. Digital & Multimedia Design
                 Instituto Politécnico de Castelo Branco
  prior       →  TeSP — Web & Multimedia Development    [grade: 15 ✓]

  layers      →  bare-metal kernels  →  systems daemons  →  REST APIs  →  UIs
  philosophy  →  understand the whole stack, own every layer

  status      →  [ BUILDING ] — always.

Most developers live at one end of the stack. I write kernels and ship products — because you can't truly master one without understanding the other.


> cat skills.json | jq

⚙️ Systems & Low-Level

C Assembly Rust Go

🖥️ Backend & Scripting

C# Python PHP Node.js Bash Lua

🌐 Frontend

TypeScript JavaScript React Next.js

🗄️ Data & Infrastructure

PostgreSQL SQLite MongoDB SQL Server Oracle Docker Terraform Linux


> ls -la ./projects --sort=impact

Production systems, open-source tooling, and systems experiments. All shipped.


🔁 TeamPulseBridge

Production-grade event ingestion bridge Slack · Teams · GitHub · GitLab → one hardened pipeline

Built in Go with HMAC/token webhook verification across 4 providers. Ships with OpenTelemetry tracing, structured slog logging, Prometheus metrics, JWT-protected admin routes, and full Terraform IaC on GCP (GKE, Cloud SQL, VPC, Cloud Armor). Six CI workflows: lint, race detector, vuln scan, smoke tests, automated releases.

→ Security, observability, and reliability — from commit one.


Go Terraform OpenTelemetry Docker GCP

💬 Chatify

Terminal-first, self-hosted chat server WebSocket · SQLite · Rust · Cross-platform

Concurrent WebSocket server with SQLite-backed event persistence, multi-channel messaging, DMs, voice, file transfers, reactions, and time-window history search. Optional Discord bridge behind a Cargo feature flag. Cross-platform binaries with automated Windows packaging and SHA256 checksums.

→ Systems thinking applied to networked, concurrent software.


Rust SQLite WebSocket CI

📊 PulseData

Full-stack data engineering platform .NET 8 · PostgreSQL · ETL · BI-ready

Clean ETL pipeline modelling real-world e-commerce analytics — ingestion, transformation, and BI-ready output. Designed around the principle that bad data architecture costs more than bad code.

→ End-to-end system design, not just endpoints.


C# .NET 8 PostgreSQL

🔌 SPO2SQL

Enterprise integration bridge SharePoint Online → SQL Server · CSOM · Data Quality

Syncs SharePoint lists to SQL Server via CSOM, applying data quality routines to catch structural inconsistencies before they reach downstream reports. The kind of unglamorous, critical infrastructure that keeps businesses running.

→ Tools that survive contact with production.


C# SharePoint SQL Server

> git log --oneline --all --graph





Activity Graph


> cat /proc/currently_running

[ ACTIVE ]  Distributed systems & consensus algorithms — Raft, Paxos
[ ACTIVE ]  OS internals — scheduler design, memory models, lock-free structures
[ QUEUED ]  eBPF-based observability tooling in Rust
[ QUEUED ]  Contributing to open-source systems projects
[ ALWAYS ]  Reading. Building. Shipping. Iterating.

Available for Rust backend/systems contract work. See Chatify for shipped proof: async WebSockets, SQLite persistence, protocol contracts, CI, releases, and security notes.


┌─[guilherme@kill74]─[~]
└──╼ $ sudo shutdown -h now

  Syncing filesystems...
  Saving state...
  [ always building → never stopping ]

Connection to kill74 closed.

// The present is connected to the past and future. — Lain


Pinned Loading

  1. SPO2SQL SPO2SQL Public

    A console application to synchronise SharePoint Online lists with a SQL Server database, including data quality routines for common list inconsistencies. Built with the SharePoint Client Side Objec…

    C# 2

  2. Chatify Chatify Public

    Self-hosted, terminal-native chat server written in Rust. Ships a WebSocket server, a terminal dashboard client, and an optional Discord relay bridge. Designed for controlled deployments where oper…

    Rust 2

  3. PulseData PulseData Public

    A full-stack data engineering project built with C# / .NET 8, PostgreSQL, and a clean ETL pipeline. Designed to simulate a real-world business intelligence system for an e-commerce operation.

    C#

  4. TeamPulseBridge TeamPulseBridge Public

    Production-style event ingestion bridge for engineering activity signals (Slack, Teams, GitHub, GitLab), built in Go with strong security, observability, and reliability defaults.

    Go