Senior fullstack engineer with strong backend focus, building production-grade systems, internal platforms and SaaS products. Experienced in designing scalable architectures, integrations and AI-assisted systems with direct business impact.
- Senior Fullstack Engineer with backend-first mindset
- Strong mastery of TypeScript as a systems language
- Proven experience in application and system architecture
- End-to-end ownership: from design to production
- Frequent work on B2B, internal tools and government systems
- Engineering decisions driven by cost, risk and scalability
- Robust APIs and well-defined contracts
- Multi-tenant systems and RBAC
- Internal dashboards and admin panels
- Complex third-party integrations
- Operational automation through code (not low-code)
- Conversational systems using RAG (Retrieval-Augmented Generation)
Note: I have evaluated tools like n8n,
but do not use n8n in production systems.
I prioritize code-based solutions for versioning, control, predictability and long-term maintainability.
- Node.js · TypeScript
- NestJS · Express
- Python · GO
- tRPC · Server Actions
- PostgreSQL · Supabase · Firebase · MongoDB
- Redis · Webhooks · Queues
- Authentication, RBAC, Multi-tenancy
- Next.js
- React
- Tailwind CSS · Shadcn/UI
- Vercel
- Docker
- CI/CD pipelines
- Logging and observability
- RAG pipelines (document-grounded answers)
- LLM integrations for support and automation
- Knowledge base ingestion and retrieval control
Municipal and government-grade platforms
- Monitoring of corporate compliance and expiring documents
- Intelligent scheduling of inspections and support actions
- Internal-only, security-first systems
- Stack: TypeScript · Next.js · Supabase
Production-oriented conversational systems
- Strict knowledge-based responses (hallucination-resistant)
- File ingestion and semantic retrieval
- Full logging and traceability
- No unnecessary frontend — operations focused
- Stack: TypeScript · Backend-centric · RAG
🔗 https://agendasaas.renatosiqueira.dev
📦 https://github.com/RenatoSiqueira/AgendaSaas
- Online scheduling platform
- Google Calendar and Sheets integration
- Stack: Next.js · TypeScript · Tailwind CSS
- Pragmatic engineering decisions
- Clean, maintainable and scalable code
- Systems designed for change and growth
- Clear communication with product and stakeholders
- Strong focus on delivery and real-world constraints
- LinkedIn: https://www.linkedin.com/in/renatosiqueira/
- Email: renatoelysiqueira@gmail.com
Less hype. More systems that work in production.
Este repositório possui anotações e exercícios de cursos diversos, para fins de organização.