As a passionate frontend and full-stack engineer with expertise in React, TypeScript, NestJS, AWS, and AI/LLM integration, I thrive on building scalable, high-performance applications that transform complex challenges into intuitive digital experiences.
Diego Fandiño
Software Engineer
About Me
Frontend Engineer • Full Stack • AWS Certified
Frontend Engineer with 8+ years delivering scalable, high-performance, user-focused web apps across fintech, edtech, banking and retail. Expert in React, TypeScript, NestJS, Node.js, PostgreSQL/DynamoDB and AWS architecture (Lambda, S3, CloudFront, RDS) — AWS Certified Cloud Practitioner. Specialized in system design, Micro-frontends, Core Web Vitals and RAG/AI workflows.
At Yourway Learning, I built a RAG pipeline serving 10K+ requests/day and AI agents supporting 30K+ students. At Pragma, I reduced infrastructure costs by 40% and improved Lighthouse from 58 to 92. Based in Cali, Colombia, I’m fluent in English and value mentoring and strong code-review culture.
- React
- TypeScript
- Next.js
- NestJS
- Node.js
- PostgreSQL
- AWS
- RAG / AI Agents
- Micro-frontends
- Tailwind CSS
- GraphQL
- Docker
Projects
Some of my work
Northstar Labs — RAG Assistant
A full-stack retrieval-augmented generation (RAG) assistant covering the AI pipeline and client experience. The backend ingests documents, creates local embeddings through Ollama, and stores vectors in PostgreSQL with pgvector for similarity search. The React frontend provides streaming chat and document upload, end-to-end AI architecture.
FastifyPostgreSQLpgvectorOllamaVercel AI SDK
Supply Chain Platform
A SaaS product landing page designed to sell a supply-chain platform to operations teams. A live dashboard mockup shows fleet utilization, on-time delivery, and active routes at a glance. The page follows a clear conversion path from learning more to exploring the platform and booking a demo.
Next.jsReactTailwind CSS
Garage GraphQL Maintenance
A Next.js application for tracking a garage's vehicle fleet and maintenance history. It includes a self-hosted GraphQL API built with GraphQL Yoga, allowing the frontend to query each vehicle's mileage, service records, and upcoming maintenance needs. The UI uses the App Router, Server Actions, shadcn/ui, Base UI, and Tailwind CSS v4 in a full-stack TypeScript codebase.
Next.js 16React 19GraphQL YogaTypeScriptTailwind CSSshadcn/ui
Volt Logistics — Freight Site
A marketing website for a logistics company built to turn visitors into leads. The homepage presents real-time cargo tracking across road, sea, and air, supported by pages for services, compliance, and a conversion-focused contact flow. The project combines clear information hierarchy, fast load times, and a trustworthy enterprise design.
Next.jsReactTailwind CSS
Get In Touch
Let's build something together
Have a project, need a frontend/full-stack engineer, or want to talk about RAG/AI integration? I'm open to freelance and full-time opportunities — drop a message and I'll get back within 24h.
Emaildiegofandinodev@gmail.com
LocationCali, Colombia — Remote worldwide
LinkedInlinkedin.com/in/juan-diego-fandino
GitHubgithub.com/diegofandino