Sigma S.
From: Brazil
Location: Belo Horizonte, BR
On Useme since 29 October 2026
About me
I sit right at the intersection of a passionate hobbyist and a dedicated freelancer. I create because I love it, and I deliver because it's business. I integrate agentic coding tools and AI-driven workflows with a meticulous, human-centric approach, never missing the details only detected by a sharp, clinical human eye. Stacks: Python, Javascript/Typescript, PhP, Html/CSS, SQL, Capybara, PlayWright.
Categories
CV / Résumé
Oct 2024 - Now
Self employed
Autonomous
Developing assistant softwares with LLM integration to serve as support to personal projects in areas such as Linguistics and Philosophy.
Apr 2021 - May 2022
Frontend developer/ Quality Assurance
W16/ Hostgator
Started as frontend developer on W16 software house, working remotely with React and React Native for multiple projects in diverse areas including education, tourism, health. Later outsourced to learn and act as QA tester on Hostgator Latin America.
Mar 2016 - Feb 2020
Freelancer
Freelancer.com
Sporadic freelancing creating scripting for internal businesses' process automation and websites.
Portfolio
Stream of Consciousness
Privacy-first journaling assistant with a local LLM on Vue + WebLLM. Displays a word/sentence landscape and a gentle CBT-lite reflection based on theme extraction and sentiment classification, with immediate help-line trigger depending on user input.
Eisenhower Matrix
Eisenhower Matrix for task prioritisation on React + Vite, using a double-sorting model: the user positions each task along a single 1-D axis twice, for urgency then importance, and the app crosses the two coordinates into a 2-D point on the matrix.
Typing test
Typing-test with Python backend to support language learning. Visual feedback upon typing and test results with WPM, accuracy and errors, leveraging word reading via Web Speech API or pre-generated word audio by SAPI5 voices (Windows-only so far).
Dual language app
Dual language app on react native with external LLM integration. Based on contrastive linguistics, allows the user to infer structural variations between two specific languages, with the support of a third, using high-substance, short texts.