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Hi, I'm

Isaque Elis

Backend & Full-stack Developer

I build APIs with Python/FastAPI and interfaces with React/TypeScript. Right now I'm deep into Rust, writing a native note-taking app from scratch.

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isaque@fedora: ~
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01 · journey

From agribusiness to Rust

I didn't start in computing — and that shaped how I work: understand the user's problem before writing code. Each step below brought a different role and lesson.

  1. 2018

    Agribusiness Technician

    IFRJ — Campus Pinheiral · Student

    Technical high school far from computing: processes, quality, production.

    What I took away → Thinking in processes and about who is on the other side of the product.

  2. 2022

    Switching to tech

    UFRRJ → FATEC São José dos Campos · Computer Science → Systems Analysis

    Started Computer Science at UFRRJ and moved to Systems Analysis & Development at FATEC, drawn by its real-client projects.

    What I took away → Learning fast on my own — Python, Flask, Linux.

  3. 2023

    Leading teams

    VAPT · SOGAP · Scrum Master & Dev

    Two semesters as Scrum Master. On SOGAP, for Ionic Health, I also set up Docker/Nginx and real-time updates over WebSockets.

    What I took away → Unblocking the team is worth more than individual heroics.

  4. 2024

    First product in production

    Papel Social · Full-stack

    25 pages, a news publisher and an interactive map. Next.js on Cloudflare Workers, FastAPI on AWS EC2, S3 and PostgreSQL on RDS. In parallel, PO of Climatrack.

    What I took away → Ownership of a system real people depend on.

  5. 2025

    Data and AI

    WideData · Auxia · Frontend / Backend Dev

    Delta Lake with PySpark at WideData; RAG, JWT/OAuth2 and PyTest on Auxia. Graduated in Systems Analysis.

    What I took away → Designing backends with tests in mind from day one.

  6. 2026

    Enterprise integration

    SPS Group · Developer

    POS integration with SAP Business One: items, prices and taxes, NFC-e receipt monitoring and reprocessing, n8n automations.

    What I took away → Shipping inside a large legacy system without breaking things.

  7. 2026

    Anotadinho

    Rust · Tauri · Yew · Author

    A native note editor written in Rust, from the parser to an MCP server.

    What I took away → Systems thinking, ownership and testing discipline at scale.

02 · featured project

Anotadinho

A native, offline-first Markdown note editor inspired by Obsidian and Logseq. A personal project I use to really learn Rust: crate-based architecture, tests, a CLI, a TUI and an MCP server for AI agents.

lines of Rust
55,328
automated tests
851
commits
345
implementation cycles
266
  • Rust
  • Tauri 2
  • Yew (WASM)
  • SQLite FTS5
  • Ratatui
  • MCP
Read the case study →Code on GitHub ↗

Your data is just files

Everything lives in .md files with YAML frontmatter. The 9 interactive embed types use a {{ type: "X" }} syntax that never collides with CommonMark, so files stay readable in any editor.

AI proposes, human decides

The MCP server (JSON-RPC over stdio) gives agents like Claude Code direct read access to the vault — but the only write tool is "propose". Changes land on a review screen and only hit disk after a human click.

Cycle-driven development

The project evolves in cycles, not loose commits: each cycle reads a task, implements it, runs tests, checks acceptance criteria and records status. That keeps 800+ tests green across 55k lines.

One core, three interfaces

The same Rust core powers the desktop app (Tauri + Yew/WASM, ~1 MB vs ~100 MB for Electron), the CLI and the terminal TUI.

03 · experience

In the industry

Apr 2026 — Sep 2026

SPS Group ↗

POS integration with SAP Business One

  • ›Automated per-branch item registration from SAP B1 to the POS (different codes per store), with prices, taxes and promotions — replacing a manual process done by consultants.
  • ›Created monitoring for NFC-e receipt integration, in the format defined by the consultants.
  • ›Developed a reprocessing screen for failed receipts, showing the error and SAP stock.
  • ›Added tabs to the Foods settings screen and evolved Prisma schemas in the Node.js backend.
  • ›Learned n8n and the POS APIs to build the NFC-e receipt integration flows.
  • React
  • JavaScript
  • Styled Components
  • Node.js
  • Fastify
  • Prisma
  • n8n
  • SAP Business One

May 2025 — Jun 2025

WideData

Web platform for dynamic data management, analysis and ingestion

  • ›Built the React + TypeScript (Vite) frontend with the Carbon design system and containerized it.
  • ›Implemented DeltaTable support in the backend with PySpark.
  • ›Owned the frontend and the Delta Lake features.
  • React
  • TypeScript
  • Vite
  • Carbon
  • FastAPI
  • PySpark
  • Delta Lake
  • AWS EC2
  • AWS S3
  • Docker

Feb 2024 — Sep 2025

Papel Social ↗

Web platform for managing and sharing social initiatives

  • ›Delivered 25 Next.js pages hosted on Cloudflare Workers for global delivery.
  • ›Built an in-house news publisher: files on S3 and content in PostgreSQL on Amazon RDS.
  • ›Developed an interactive map of slave-labor routes in Brazil.
  • ›Owned the architecture: FastAPI on AWS EC2 and frontend–backend integration.
  • Next.js
  • React
  • TypeScript
  • Cloudflare Workers
  • FastAPI
  • Python
  • PostgreSQL
  • AWS EC2
  • AWS S3
  • AWS RDS

04 · academic projects

Six semesters, six real clients

At FATEC every semester is an Integrator Project (API) for a real client. I've been Developer, Scrum Master and Product Owner — filter by role.

05 · skills

Skills with proof

Click a technology to see where I actually used it.

Backend

Frontend

Data

Infra

06 · contact

Let's talk?

I'm open to backend and full-stack roles. The fastest way to reach me is email or LinkedIn.

isaqueelis2@gmail.comLinkedIn ↗GitHub ↗Download résumé ↓