Resume
Senior Full-Stack Developer · AI/LLM Engineer
Full-stack developer with 25+ years of experience building scalable products across healthcare, gaming, fraud detection, and enterprise AI. Currently focused on AI/LLM engineering — designing RAG systems, multi-agent architectures, and vector-database backends, and shipping them end to end as the sole or lead engineer.
Pergamino, Argentina · leandro@ardissone.com
English (Professional) · Spanish (Native)
Experience
Independent / Freelance — Feb 2026 – Present
AI / Full-Stack Engineer
Independent engineering focused on AI/agentic product work.
→ CraftyAmigo — 3D design / CAD platform
Contributing across the AI and product stack of a parametric-CAD platform. Built a parametric CAD code-generation pipeline using RAG over a ~1,000-part catalog; developed a React annotation tool driving vision-LLM feedback loops; and worked on agentic, computer-use-based testing of the platform’s scripting layer. Also shipped payment gating (hybrid subscription + credit-ledger with Stripe).
Python · RAG · AI agents · React · Stripe · Meilisearch
Sprint Studios / Optic Power — May 2020 – Feb 2026
Senior Software Developer
Full-stack developer across multiple client projects, with recent focus on AI/LLM integrations and enterprise solutions.
→ Enterprise Knowledge Base Platform (Ozma AI)
Architected and developed a multi-tenant RAG platform enabling companies to build AI-powered knowledge bases with per-tenant data isolation. Improved retrieval relevance with HyDE (Hypothetical Document Embeddings) and integrated the Model Context Protocol (MCP) to connect tools and context sources to the LLMs. Built ingestion integrations with Google Workspace and Microsoft Outlook, and specialized AI agents for querying emails, calendar events, and meeting notes. Migrated the platform from Docker Compose to AWS ECS/Fargate, defined as infrastructure-as-code with AWS CDK.
Python · pgvector · HyDE · MCP · OpenAI API · Claude API · Gemini · AWS ECS/Fargate · AWS CDK · Docker
→ MundoLMS
Led the development team building a learning-management system from the ground up, enabling institutions to deliver online courses. Owned architecture decisions, feature development, and team coordination.
React · Node.js · PostgreSQL
→ Snappt
Contributed to frontend and backend of a fraud-detection platform helping property managers identify falsified financial documents.
React · Node.js
→ Blitz
Built features for a gaming companion app delivering real-time player statistics, focused on the CS:GO integration.
React · TypeScript
→ Tathata Golf
Contributed to a React Native mobile app for golf training.
React Native
→ Portal One & Player’s Lounge
Developed serverless backend infrastructure for mobile gaming platforms.
AWS · Serverless · Node.js
Mobile-Tonic — Apr 2016 – Mar 2020
Senior Software Developer
Web apps, mobile apps, chatbot platforms, and cloud infrastructure for various clients.
→ Multi-Channel Chatbot Platform
Built a chatbot platform spanning Facebook Messenger, Slack, WhatsApp, and Telegram, with NLP-driven conversation flows.
Node.js · NLP
→ Services Marketplace
Developed a marketplace connecting service providers with customers.
Node.js · React
→ Serverless Infrastructure
Designed serverless architecture on AWS using FaunaDB for real-time data synchronization.
AWS Lambda · FaunaDB
Freelance — Oct 2014 – May 2020
Web & Mobile Developer
Full-stack development for clients worldwide, specializing in healthcare technology.
→ Healthcare Applications
Built health applications including electronic health record (EHR) systems and tools for processing and analyzing disease-specific medical data.
Python · Django · PostgreSQL
→ Medical Research Platform
Built a mobile app for capturing and analyzing patient data, assisting physicians in research and medical writing.
React Native · Django
RedLotus — Mar 2015 – Mar 2016
Software Developer
Marketing-technology tools for publishers on the AddNow product team.
→ Database Optimization
Redesigned the MongoDB schema from a flat event model to a time-series architecture, significantly improving query and analytics performance.
MongoDB
→ Publisher Dashboard & REST API
Built the publisher-facing SPA (real-time analytics, campaign management) and backend APIs with Django REST Framework and JWT auth.
AngularJS · Django · DRF · JWT
Munchkin Fun — Dec 2011 – Mar 2015
Lead Software Engineer
Led technical development of a platform for discovering and managing kids’ events in the Florida area.
→ Platform & Infrastructure
Created two interconnected apps from scratch (event discovery + venue management) and designed the full server infrastructure — load balancers, background workers, app servers, databases, CDN — with automated deployment across AWS and DigitalOcean.
Python · Django · MongoDB · Celery · AWS · SaltStack · Nginx
Quolaw — Dec 2012 – Sep 2014
Software Developer
Early-stage startup building case-management software for law firms. Extended the Django/DRF backend and built a Cordova + AngularJS hybrid mobile app for on-the-go case access.
Django · DRF · Cordova · AngularJS
Entaste LLC — Nov 2010 – Nov 2012
Python Developer
Helped build one of the largest wine databases in South America. Created the region’s first digital wine-list system for restaurants (tablet-based browsing and ordering), and implemented load-balancing / high-availability infrastructure for traffic spikes.
Python · Django · Nginx · AWS
Freshout — Sep 2008 – Sep 2009
Executive Technical Director
Researched and implemented web technologies to improve development efficiency across the studio’s projects.
HiDef Web Solutions — Sep 2005 – Aug 2008
Frontend Developer
Built PHP/MySQL web applications on the LAMP stack, and Drupal-based websites with Ajax-powered interfaces.
PHP · MySQL · Drupal · Ajax
AXG Tecnonexo — Nov 2003 – Dec 2004
Frontend Developer
User-interface development for LMS and eLearning systems.
i-logic web solutions — Feb 1999 – Nov 2003
Freelance Programmer & Project Manager
Websites and web projects for clients around the world. Oversaw project delivery and managed a team of 3.
Technical Skills
Backend: Python · Django · FastAPI · Flask · Node.js · NestJS · Express · Elixir
Frontend: TypeScript · React · Next.js · React Native · Vue.js
AI / LLM: RAG systems · AI agents · Multi-agent systems · Model Context Protocol (MCP) · Embeddings · HyDE · pgvector · OpenAI · Claude · Gemini
Cloud / Infra: AWS (ECS/Fargate, Lambda, Serverless) · AWS CDK (IaC) · Docker
Data: PostgreSQL · MongoDB · Redis · DynamoDB · MySQL
Education
Escuela de Enseñanza Técnica Nro 1 – Bartolomé Mitre — 1994 – 1998
High School, Computers