NICOLAS A. VALENZUELA

AI Engineer & Full Stack Developer

Colombia+57 310 207 9572nicolasalbertov18@gmail.com

nival.is-a.dev github.com/beto18v www.linkedin.com/in/beto18v/

Spanish (Native) | English (B2)

Professional Summary

AI & Software Developer with 2+ years of experience. I design and implement generative AI systems with RAG architecture, multi-provider LLMs (AWS Bedrock, OpenAI, Gemini) and vector search (Qdrant, FAISS), orchestrated with LangChain and LangGraph in production. Full stack with Next.js, Angular, FastAPI, and Spring Boot. I deploy on AWS, Docker, Hetzner, and Vercel. From prompt engineering to deployment: end-to-end solutions with a results-driven focus.

Experience

AI & Software Developer

ITS Solutions · Bogotá, Colombia · Apr 2026 – Present

Designed and implemented generative AI systems with a RAG architecture and multi-provider LLMs (AWS Bedrock, OpenAI, Gemini) orchestrated with LangGraph — in production from day one.
Developed the backend of a commercial AI chatbot in FastAPI: RAG pipeline with LangGraph, lead capture and enrichment, 3-layer rate limiting, cost telemetry and prompt injection defenses.
Developed a real-time monitoring dashboard in Next.js with SSE (Server-Sent Events), showing KPIs, conversations, leads and cost per turn.
Implemented semantic search with vector search (Qdrant, FAISS) and embeddings on AWS Bedrock, with ingestion pipelines and semantic chunking.
Designed multi-layer architectures communicating over HTTP (Angular, Spring Boot, FastAPI) with fusion-based ranking and automated document processing.

AI Engineer & Full Stack Developer

Nunca Cierro · Personal Project · 2026 – Present · In Production

Automated 24/7 customer support for multiple businesses simultaneously: books appointments, answers questions and processes orders over WhatsApp and Telegram with no human intervention.
Integrated WhatsApp and Telegram APIs with Groq and Ollama models for real-time natural language processing, building the frontend with Next.js and the API with FastAPI.
Deployed the multi-service architecture on Hetzner with Docker, Cloudflare and PostgreSQL, scaling horizontally across businesses with 99.9% uptime.

Core Developer & SaaS Architect

Dinerance · Personal Project · 2025 – Present · In Production

Designed PostgreSQL schemas with Supabase applying Row-Level Security for multi-tenant isolation, supporting concurrent operations.
Built the API with FastAPI and SQLAlchemy, applying controlled migrations with Alembic and JWT authentication.
Developed the financial dashboard with Next.js, TypeScript, Tailwind CSS, and shadcn/ui.