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
Cabelo Marcado — Scheduling SaaS for Beauty Professionals
- 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
devcaminhante-paste — Pastebin Clone in Rust
- Stack: Rust, Systems Programming
- Purpose: Learning Rust through practical implementation
- Highlights: Tutorial-style documentation, clean architecture
NostraDAO/nostracity-app — DAO City Builder
- Stack: TypeScript, Web3, Blockchain
- Role: Core contributor
- Highlights: Complex state management, DAO governance logic
ciafit-lp — High-Performance Landing Page
- 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