Javier Mansilla Moraga
Verified Expert in Engineering
Full-stack Developer
San Pedro de la Paz, Chile
Toptal member since August 27, 2026
Javier is a software engineer with over 7 years of experience in back-end and infrastructure engineering for AI-powered systems. He achieved a 43% upper-funnel conversion rate through AI-optimized conversation flows while at Krino.ai. Javier also architected an AI-driven SaaS platform for 50+ automotive dealerships, scaling to $2 million ARR.
Portfolio
Experience
- Python - 7 years
- PostgreSQL - 6 years
- Web Scraping - 4 years
- React - 4 years
- Azure - 4 years
- FastAPI - 4 years
- Large Language Models (LLMs) - 3 years
- Claude Code - 1 year
Work Experience
Full-stack Engineer – Conversational Intelligence
Hippocratic AI
- Developed and maintained full-stack features for a Generative AI SaaS platform serving healthcare applications, building user-facing interfaces in TypeScript and React.
- Designed and implemented back-end services and REST APIs in Python and Flask, integrating with PostgreSQL for multi-user data flows.
- Collaborated cross-functionally with product, design, and AI teams to ship AI-powered features, leveraging AI-assisted development tools (Claude Code, Cursor) daily.
- Collaborated in creating a platform to run simulated calls with real data to do agents' QA.
Chief Technology Officer & Co-founder
Krino.ai
- Architected end-to-end SaaS platform powering AI-driven customer journey orchestration for over 50 automotive dealerships, growing to 2 million ARR.
- Designed and deployed production agentic AI systems using LLMs (GPT-4, Azure OpenAI), including multi-agent conversation orchestration and RAG pipelines for real-time lead qualification.
- Built scalable microservices architecture: Python/FastAPI and Node.js/Fastify back ends, React front end, PostgreSQL/MongoDB/Redis data layer, with dual cloud deployment on GCP Cloud Run and Azure Container Apps.
- Led platform infrastructure, including CI/CD pipelines, monitoring (self-hosted Sentry), analytics dashboards (Metabase), and database migrations (170GB+ PostgreSQL across Azure accounts using DMS with logical replication).
- Managed and mentored the engineering team while maintaining hands-on technical ownership across the full stack.
- Achieved a 43% upper-funnel conversion rate (vs. 17-25% industry average) through AI-optimized conversation flows and data-driven iteration.
Tech Advisor & Board Member
Completamente Inc.
- Developed a technical vision and AI strategy for a mental health technology company, advising engineering teams on applied AI product development.
- Led data and technology areas for a conversational AI assistant research project focused on mental health support.
- Helped the technical team to solve complex architectural problems.
Data Scientist
Improve Bot SpA
- Developed NLP pipelines for large-scale text analysis and built ML models exposed via Flask APIs.
- Improved chatbot accuracy iteratively through data-driven model refinement and evaluation.
- Created a data model to classify intents and user goals into actionable paths of chatbot behavior.
Project History
AI Research & Publications: NLP, Text Mining, & Sentiment Analysis
Education
Engineer's Degree in Industrial Engineering
Universidad Del Bío-Bío - Concepción, Chile
Skills
Libraries/APIs
React, REST APIs, Node.js
Tools
Claude Code, Sentry, Claude, SendGrid, Git
Languages
TypeScript, Python, JavaScript, SQL, HTML, CSS
Frameworks
Next.js, Flask, Fastify, Selenium, LangGraph
Paradigms
Microservices, Model Context Protocol (MCP), HIPAA Compliance
Platforms
Azure, Docker, Cloud Run, Amazon Web Services (AWS), GoHighLevel
Storage
Redis, Databases, JSON, PostgreSQL
Industry Expertise
Insurance, Healthcare
Other
FastAPI, CI/CD Pipelines, Metabase, Large Language Models (LLMs), Retrieval-augmented Generation (RAG), LLM Agents, Text Mining, AI Agent Orchestration, Conversational AI, AI Agents, Prompt Engineering, Artificial Intelligence (AI), Full-stack, Workflow Automation, Agentic AI, Workflow, AI Architecture, Startups, Software Architecture, Technical Leadership, Full-stack Development, Product Management, Vibe Coding, API Integration, AI Integration, APIs, Data Modeling, OpenAI, Workflow Automation & System Integration, Data Engineering, Chatbots, AI Chatbots, Natural Language Processing (NLP), Web Scraping, Cursor AI, Data Mining, Programming, Sentiment Analysis, Research, RAG Systems, Pharmacy, Front-end, Machine Learning, GCP, LangChain, Optical Character Recognition (OCR), Email Deliverability
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