Senior Fullstack Developer | SaaS Founder | Tech Lead
📍 Suzano, SP, Brazil → 🎯 Seeking USD-paying remote roles (US-based companies)

I'm a pragmatic architect with 6+ years of experience building enterprise-grade systems and lean, automated web solutions. I specialize in bridging complex enterprise requirements with high-velocity SaaS development.

Currently bootstrapping ByteForge — pivoting from a software house to a product-led SaaS company focused on niche, high-efficiency tools.

Core Philosophy: High-output, resilient, zero-fluff. I build systems that scale and businesses that last.

2020 - Present | Suzano, SP, Brazil

Leading the pivot from service-based development to a SaaS-centric product studio:

• FeiraFlow: Logistics management for street market vendors
• Cabelo Marcado: Scheduling SaaS for solo beauty professionals (MEI)
• Logus: Personal Knowledge Management (PKM) application
• Semear: Independent Christian publisher (ebooks/translations)

Growth Strategy: Programmatic SEO (pSEO) + AI-driven automation for traffic acquisition

2023 - Present | Remote

• Led impactful automation projects using Python and Playwright
• Architected adtech solutions for one of Brazil's largest media companies
• Focused on performance optimization and automated testing at scale

2023 | Remote

• Led fullstack development of AI-powered conversational platform integrated with WhatsApp, Telegram, and Line
• Built cross-platform mobile applications for iOS and Android using React Native
• Developed scalable backend API using FastAPI (Python) with Firebase and AWS
• Implemented real-time messaging features with voice transcription and synthesis
• Integrated AI capabilities for customizable conversational companions
• Delivered complete web frontend using React

2022 - 2023 | Remote

• Developed enterprise banking solutions using Salesforce LWC (Lightning Web Components)
• Built customer-facing financial services features for digital banking platform
• Collaborated with cross-functional teams on high-stakes financial products

2019 - 2022 | Remote

• Architected and managed high-traffic international WordPress/PHP environments
• Delivered enterprise-scale WordPress solutions for global clients
• Specialized in performance optimization and custom architecture

Primary: JavaScript/TypeScript, Node.js, PHP, Python
Exploring: Rust (systems programming)

Frameworks: React, React Native, Next.js, Vite
Mobile: React Native (iOS & Android)
Styling: Tailwind CSS, Chakra UI, Vanilla CSS
CMS: WordPress (International-scale architecture & performance)

Runtime: Node.js (Express, Hono)
Enterprise: Salesforce (LWC Expert, Admin, Developer)
Cloud: Firebase, Cloudflare Workers
Databases: PostgreSQL, MongoDB, MySQL

Automation: n8n (Power User), Playwright, Puppeteer
Tools: Git, Docker, CI/CD
Testing: Playwright, Puppeteer, Jest

• Blockchain/Web3: NostraDAO projects (DAO/City-builder)
• Machine Learning: Currently studying via MasterTech
• AI Integration: Building AI-driven automation workflows

📦 146 Public Repositories | 🔨 High-Output Builder

• Stack: React, Node.js, Firebase, Cloudflare Workers
• Features: Appointment scheduling, payment integration, customer management
• Impact: Serving solo beauty professionals (MEI) in Brazil

• Stack: Next.js, TypeScript, PostgreSQL
• Features: Logistics tracking, inventory management, vendor coordination
• Status: In development

• Stack: React, TypeScript, Obsidian-inspired architecture
• Features: Zettelkasten methodology, knowledge graphs, AI integration
• Status: In development

• Stack: React Native, React, FastAPI (Python), Firebase, AWS
• Features: Multi-channel integration (WhatsApp, Telegram, Line), voice transcription/synthesis, AI companions
• Highlights: Cross-platform mobile apps (iOS & Android), real-time messaging, AI integration
• Role: Lead Fullstack Developer

• Stack: Rust, Systems Programming
• Purpose: Learning Rust through practical implementation
• Highlights: Tutorial-style documentation, clean architecture

• Stack: TypeScript, Web3, Blockchain
• Role: Core contributor
• Highlights: Complex state management, DAO governance logic

• Stack: TypeScript, React, Next.js
• Focus: Performance optimization, SEO, conversion optimization
• Demonstrates: pSEO strategy and technical marketing skills

I treat learning like an engineering project — structured, disciplined, and outcome-focused.

Current Studies:

• 🤖 Machine Learning — MasterTech program
• 📐 Mathematics — Re-learning foundations for ML and engineering
• 🇯🇵 Japanese — Daily practice (Anki/Duolingo) for JLPT N5
• 📝 Knowledge Management — Advanced Obsidian user, Zettelkasten methodology

Learning Philosophy: Build a strong foundation, then iterate rapidly.

• Position: Senior Fullstack Developer / Tech Lead / SaaS Engineer
• Location: Remote (US-based companies preferred)
• Compensation: USD-paying roles
• Focus: High-impact work on scalable systems, SaaS products, or developer tools

• ✅ 6+ years of production experience across enterprise and startup environments
• ✅ Full-stack expertise from React/React Native to Node.js/PHP/Python
• ✅ Mobile development with React Native (iOS & Android)
• ✅ AI integration experience with conversational platforms and automation
• ✅ Enterprise experience with Salesforce, C6 Bank, Globo
• ✅ SaaS mindset — currently building and scaling multiple products
• ✅ High output — 146 repos, 1.2K stars, proven builder
• ✅ Self-directed — bootstrapping a business while working full-time

My ultimate goal is to relocate my family (wife + 4 children) to the United States. I'm seeking a long-term partnership with a company that values:

• High-quality engineering over quick hacks
• Product thinking and business impact
• Remote-first culture with strong async communication
• Growth opportunities for senior engineers

• 🌐 Website: theooliveira.com.br
• 💼 LinkedIn: linkedin.com/in/theooliveira
• 📧 Email: Contact via website
• 🔨 Workana: Freelance Profile