NICOLAS A. VALENZUELA
AI Engineer & Full Stack Developer
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, Groq, Ollama) 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.
Education
B.S. in Software Engineering
Corporación Universitaria Iberoamericana
- In progress · Direct credit transfer into 5th professional semester following SENA technologist degree. Expected graduation: 2028.
Software Analysis and Development Technologist
SENA (National Learning Service)
- Graduated. Comprehensive training in software architecture, databases, and agile methodologies.
Certifications
Technical Skills
AI & LLMs
LangChain · LangGraph · RAG · Multi-Provider LLMs (AWS Bedrock, OpenAI, Gemini, Groq, Ollama) · Vector Databases (Qdrant / FAISS / pgvector) · Embedding Models (Cohere, OpenAI, HuggingFace) · Function Calling · Structured Outputs (Pydantic/Instructor) · Prompt Engineering · Guardrails (Prompt Injection Defense, Rate Limiting)
LLMOps
LangSmith · Cost Tracking & Optimization · Latency Optimization · Model Routing · Feedback Loops · Monitoring & Observability
Backend & APIs
FastAPI (Python) · Spring Boot (Java) · Node.js · JWT · RESTful APIs · Streaming (SSE, WebSockets) · AsyncIO / Concurrency
Frontend
Next.js · React · Angular · TypeScript · Tailwind CSS · shadcn/ui
Databases
PostgreSQL · Qdrant · pgvector · SQLite · MySQL · Supabase · FAISS · SQLAlchemy · Alembic
DevOps & Cloud
Git / GitHub · Docker · AWS · Google Cloud Platform · Vercel · Hetzner · Cloudflare
Soft Skills
- Teamwork & collaboration
- Complex problem-solving
- Autonomy & ownership
- Technical adaptability
- Technical communication (English B2)