Hi! I'm
Alexis Mansilla
<Software Developer/>
Developer with experience in scalable applications, backend and frontend, focused on AI, Machine Learning, and databases.
About Me
Introduction
Software Developer (AI/ML) with over 3 years of experience. I specialize in designing multi-agent architectures (LangGraph, LangChain) and implementing hybrid RAG (Retrieval-Augmented Generation) systems.
Proven experience building conversational platforms by integrating LLMs (GPT-4o, Gemini, Claude) and developing cognitive solutions with Computer Vision (YOLO, MediaPipe) and speech/gesture recognition.
Experience in backend development (Node.js, Python, Elixir) and vector databases (PostgreSQL/pgvector, MongoDB Atlas Vector Search) to power semantic retrieval. I stand out for combining product vision with strong technical expertise.
Want to know more about my work and experience? Schedule an interview with me.
Experience
Work History
Software Engineer (AI) @ Grupo ROISA
I designed a modular multi-agent architecture where multiple LLMs collaborate, reason, and execute coordinated tasks through LangGraph (agent orchestration and cognitive flows), built on LangChain (chains, memory, and tools framework), with LangFuse for full telemetry and observability. I implemented hybrid RAG (Retrieval-Augmented Generation) solutions using PostgreSQL + pgvector, Chroma, and MongoDB Atlas Vector Search, enabling advanced semantic retrieval and dynamic knowledge contextualization. I integrated OpenAI GPT-4/4o, Claude 3.x, Gemini (Vertex AI), and Cohere models within multi-agent architectures for hybrid processing of text, voice, and multimodal reasoning.
Software Engineer (AI/ML) @ Athletia
I designed and developed an end-to-end sports performance analysis platform, applying Computer Vision (CV) and Generative AI to evaluate soccer training videos.
Full-stack Developer @ Skillfitai
I developed an AI-based job search platform (Stack AI).
Software Engineer @ NxLabs.io
I designed and implemented a scalable multi-tenant SaaS architecture, ensuring data isolation for multiple clients.
Full-stack Developer @ lösen
I designed and developed an automotive after-sales system with microservices and vector search.
Full-stack Developer @ Udemy
I contributed to the development of a footwear e-commerce platform with a team of 4 developers.
Full-stack Developer @ Freelance
I created custom solutions for clients, including payment integrations (Stripe, PayPal) and custom forums.