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SebastianSierra15/README.md

Sebastian Sierra

Full-stack developer working across product, web platforms, backend systems, and AI-assisted workflows

I have built production-oriented applications with TypeScript, React, Next.js, Java, Spring Boot, MySQL, MongoDB, and Docker, across real-estate platforms, educational portals, inventory systems, dashboards, private product suites, and card-game ecosystems. I care about understanding the problem, choosing the right tools, and shipping software that is useful, maintainable, and easy to evolve.

LinkedIn: Sebastian Sierra GitHub: SebastianSierra15 Email: sebsirra13@gmail.com View resume


About me

I am a Systems Engineering student at Universidad de la Amazonia and a full-stack developer who enjoys taking ideas from interface development to database-backed production flows.

My strongest area is building modern web products: clean React/Next.js frontends, API-driven backends, authentication, admin panels, data models, deployment workflows, and product features that are maintainable after the first release.

I also have experience with AI-assisted environments, including Codex and AI agents for technical exploration, automation, documentation, and modern development workflows.

Currently, I am especially interested in:

  • Product engineering with Next.js, TypeScript, React, and server-side features.
  • Backend development with Java, Spring Boot, REST APIs, security, and relational databases.
  • Systems that combine dashboards, content management, user flows, automation, AI assistance, and operational tools.

Selected work

Project Role / focus Stack Status
Habitta Website Real-estate web platform with property management, filtering, maps, authentication, and admin workflows. Next.js, TypeScript, Tailwind CSS, MySQL, Leaflet, NextAuth, AWS S3 SDK Public
Souls App Web ecosystem for a card-game product, including content, data workflows, rich UI, scripts, and production utilities. Next.js, TypeScript, React, Prisma, MongoDB, Auth.js, MDX, Tailwind CSS, Cloudflare R2/S3 Public
Souls Simulador Private simulator for the Souls card-game experience. TypeScript, React, CSS, game/product logic Private
Fudia product suite Private product ecosystem: main app, admin panel, portals, public landing, and Appwrite functions. TypeScript, JavaScript, React/Next.js, Appwrite, Docker, cloud functions Private
UdlaVerso Frontend Frontend platform for the Universidad de la Amazonia community. React, TypeScript, Vite, Tailwind CSS, React Router, Framer Motion, Recharts Public
UdlaVerso Backend Backend API for UdlaVerso with authentication, validation, persistence, and documentation. Java 17, Spring Boot, Spring Security, JPA, MySQL, JWT, Swagger/OpenAPI, Docker Public
Invehin Inventory and sales management system for clothing stores. Java, JSP, Servlets, MySQL, NetBeans Public

Technical stack

Languages

TypeScript JavaScript Java Python HTML5 CSS3 Astro

Frontend

React Next.js Vite Tailwind CSS Sass Framer Motion

Backend and APIs

Spring Boot Node.js Prisma JWT Swagger Appwrite AI Agents Codex

Data and infrastructure

MySQL MongoDB PostgreSQL Docker Vercel AWS S3 Git


How I work

  • I care about product context first: the feature, the user flow, and the business rule behind the code.
  • I like structured systems: clear APIs, reusable components, explicit data models, and maintainable project organization.
  • I am comfortable moving across frontend, backend, database, deployment, and debugging work.
  • I document what matters so a project can be understood after the initial build.

GitHub snapshot

Sebastian Sierra GitHub stats Most used languages

Building practical software with product sense, clean interfaces, and reliable backend foundations.

Pinned Loading

  1. Invehin Invehin Public

    Sistema web para la gestión de ventas e inventario en tiendas de ropa. Desarrollado en Java (NetBeans) utilizando JSP, servlets y MySQL. Permite registrar productos, gestionar ventas, controlar el …

    Java 1

  2. udlaverso-frontend udlaverso-frontend Public

    Frontend para la pagina web del udlaverso de la Universidad de la Amazonia

    TypeScript 1

  3. sierra-language-academy sierra-language-academy Public

    Astro

  4. udlaverso-backend udlaverso-backend Public

    Java

  5. AndreSuaza/app-souls AndreSuaza/app-souls Public

    six app

    TypeScript 1

  6. Habitta-Inmobiliaria/habitta-website Habitta-Inmobiliaria/habitta-website Public

    A web app built with Next.js, TailwindCSS, and MySQL for efficient property management. It features dynamic filtering, map integration with Leaflet, RESTful API support, and pagination for optimize…

    TypeScript