Full-Stack Developer focused on backend architecture, AI/RAG systems, and data analytics infrastructure.
Currently building production SaaS at Aggressive Solutions — fully remote, US-based.
I build systems that run in production, handle real data, and serve real users.
Over the past year I've been working as the core developer of LeadStats — a call center analytics and CRM platform for the insurance industry — where I own the full stack: backend, frontend, database, and infrastructure.
- 🤖 Lately deep into AI/RAG systems, LLM integrations, and agentic workflows
- 🛠️ I work with full autonomy — from system design to production deployment
- 🎓 Finishing my Bachelor's in Software Engineering at Anhanguera
- 📫 Reach me at: LinkedIn · nickolasmelo71@gmail.com
| Category | Technologies |
|---|---|
| Languages | TypeScript, JavaScript, Python |
| Frameworks | NestJS, Vue 3, React, Django, FastAPI |
| Databases | PostgreSQL, ClickHouse, Redis, pgvector, Firestore |
| AI / Automation | RAG Systems, LlamaIndex, LLM Integration, n8n |
| DevOps | Docker, CI/CD, GitHub Actions, AWS, Azure |
| Tools | AG Grid Enterprise, Drizzle ORM, AWS SES, Wasabi |
A full call center analytics and CRM platform serving insurance agencies across the US.
Key systems I designed and built:
- RAG-powered support chatbot — NestJS + LlamaIndex + pgvector, graph-based reranking, RBAC filtering
- AI Agent Coach — LLM-based insurance call analysis with structured feedback
- Reporting infrastructure — 4 report types with timezone-aware scheduling and failure recovery
- Followup queue engine — SLA-based prioritization, materialized CTEs reduced query time from 10+ min to ~33s
- Transfers system — missed-transfer tracking, IVR fallback, directional indicators
- Data analytics pages — heatmaps, data integrity, vendor & agent performance dashboards
- n8n automation — Plane + Chatwoot integration for AI-powered support ticket generation
Digital wallet and financial transaction management API.
Stack: Django · PostgreSQL · JWT
2D game built in Python.
Stack: Python · Pygame
CRUD system for employee management.
Stack: React · JavaScript
| Stats | Top Languages |
|---|---|
- CS50 — Programming with Python (Harvard EdX)
- Professional Python (Solyd Offensive Security)
- Full Stack Web Developer (Udemy)
- Machine Learning (Stanford — Coursera)
- Introduction to Information Security (Cisco)
🇧🇷 Portuguese — Native | 🇺🇸 English — Advanced (C2) | 🇪🇸 Spanish — Basic