Gabriel
Software Engineer — I work at the largest publicly traded fintech in Brazil. I earned 4 promotions in 3.5 years by shipping software that moves real business metrics: a financial security tool that saves 40 hours/month and R$24,000+ annually, shared components used by 50+ developers across a system serving 1,518 active users, and regulatory compliance implementations that averted heavy fines.
My core stack is React, TypeScript, and Next.js — but I work across the full engineering cycle: distributed systems architecture, end-to-end observability, cross-team collaboration, and mentoring junior devs. I’m the person teams call when the scope is vague, the deadline is tight, and quality can’t slip.
Currently also building Dontosys from scratch — a multi-tenant SaaS CRM for dental clinics — handling everything from infrastructure and authentication to product.
How I work
Extreme Ownership
End-to-end accountability for everything I build — from spec to production monitoring. I advocate for the customer internally and raise engineering standards across the team.
Architecture that Scales
Architectural decisions on distributed systems backed by full observability: logging, tracing, profiling, and metrics. Resilient software that holds under pressure.
Measurable Impact
I navigate ambiguous scenarios with data-driven decisions. I balance impact vs. investment to deliver results that move real business metrics.
Blog
View all ↗Architecting a complex CRM front-end
The folder structure and dependency rules I use after 4 years working on complex CRM systems.
How image compression works
The techniques behind compression: resize, WebP, quality, methods — language-agnostic, focused on the concepts.
UI basics for programmers
Color, typography, spacing, visual hierarchy — the principles that make an interface look professional without needing to be a designer.
Featured projects
A high-performance 3D voxel rendering engine built 100% in pure JavaScript, with no external engines. Implements raycasting, procedural terrain generation using Perlin noise, and renders interactive voxel worlds directly on the browser canvas. A project born from curiosity that proves environmental constraints are just starting points for creative solutions.
Open-source calendar component for React with Material-UI and TypeScript, inspired by Google Calendar. Supports month, week, and day views with full event management — creation, editing, deletion, conflict detection, and drag-to-select. Published on npm with comprehensive Storybook documentation and Cypress test coverage.
Complete photo editor running 100% in the browser with no server uploads. Crop, remove backgrounds with AI, apply filters, add text overlays with Google Fonts, and compress images — all processed locally. Built with Next.js, Material-UI, and client-side Canvas APIs for a fast, privacy-first editing experience.
Lossless image compressor running entirely in the browser — no uploads, no servers. Drag and drop your images and get optimized files instantly. Supports PNG, JPG, WebP, AVIF, and GIF. Built with Next.js and Material-UI, 100% free with no limits.
Calculate the growth of your investment with compound interest. Visualize portfolio composition with a stacked bar chart and estimate monthly retirement income using the 3% and 4% safe withdrawal rules (Trinity Study).
Timeline
Software Engineer III
Stone
At Stone, I operate with full autonomy on the highest-complexity challenges — making architectural decisions for a distributed system serving 1,518 active users, used daily by 50+ developers. I deliver end-to-end observability: structured logging, distributed tracing, profiling, and metrics. Selected cross-team to deliver critical quarterly-goal features in record time, and implemented mandatory regulatory changes that averted tens of thousands of reais in fines. I also mentor junior engineers through high-impact technical decisions.
