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    © 2026 Sebastian Alvarez

    My Full Tech Stack

    A categorized breakdown of the languages, frameworks, and tools I use to design, build, and ship software.

    80 technologies across 10 areas

    Not on the list? Not a blocker.

    Working with AI every day has made picking up new tools fast. I carry what I know from one technology to ones I haven't used yet: map the concepts, learn the idioms with an AI pair, and ship to the same standard.

    What I knowWhat your team uses

    Languages

    10
    • JavaScript

      Core language for the web, used across frontend and backend development for building interactive, dynamic applications.

    • TypeScript

      Strongly typed superset of JavaScript used to build safer, more maintainable applications at scale.

    • Python

      Versatile language used for backend services, automation, data processing, and AI/ML development.

    • Go

      Compiled language used for building fast, concurrent backend services and infrastructure tooling.

    • Dart

      Language optimized for building fast, cross-platform apps, primarily used with Flutter.

    • CSS

      Styling language used to control layout, design, and responsiveness of web interfaces.

    • HTML

      Markup language used to structure content and build the foundation of every web page.

    • Java

      Object-oriented language used for building robust, large-scale backend applications.

    • PHP

      Server-side scripting language used to build and extend WordPress-based sites.

    • MATLAB

      Numerical computing environment used to prototype real-time computer vision algorithms.

    Frontend

    21
    • JavaScript

      Core language for the web, used across frontend and backend development for building interactive, dynamic applications.

    • TypeScript

      Strongly typed superset of JavaScript used to build safer, more maintainable applications at scale.

    • React.js

      Component-based library for building fast, interactive user interfaces across web applications.

    • Next.js

      React framework used for server-side rendering, static generation, and building full-stack production apps.

    • Flutter

      Cross-platform UI toolkit for building natively compiled mobile, web, and desktop apps from a single codebase.

    • Tailwind CSS

      Utility-first CSS framework used to rapidly build custom, responsive interfaces without leaving HTML.

    • Material UI

      React component library implementing Google's Material Design for polished, accessible interfaces.

    • Angular

      TypeScript-based framework used for building large-scale, structured single-page applications.

    • Astro

      Content-focused web framework used to ship fast, minimal-JavaScript static sites.

    • CSS

      Styling language used to control layout, design, and responsiveness of web interfaces.

    • Graphql

      Query language for APIs used to fetch exactly the data clients need in a single request.

    • GSAP

      JavaScript animation library used to build smooth, high-performance motion and scroll effects.

    • HTML

      Markup language used to structure content and build the foundation of every web page.

    • Redux

      Predictable state management library used to manage complex application state in React apps.

    • Storybook

      UI development environment used to build, document, and test components in isolation.

    • FFmpeg WASM

      WebAssembly build of FFmpeg used for in-browser video and audio processing with no server needed.

    • PWA

      Progressive Web App standards used to build installable, offline-capable web experiences.

    • RadixUI

      Unstyled, accessible component primitives used to build custom, high-quality design systems.

    • i18n

      Internationalization tooling used to build multi-language apps with locale-aware content.

    • Shopify

      E-commerce platform used to build and extend customer-facing online stores.

    • WordPress

      Content management system used to build and customize websites and online stores.

    Backend

    18
    • JavaScript

      Core language for the web, used across frontend and backend development for building interactive, dynamic applications.

    • TypeScript

      Strongly typed superset of JavaScript used to build safer, more maintainable applications at scale.

    • Next.js

      React framework used for server-side rendering, static generation, and building full-stack production apps.

    • Node.js

      JavaScript runtime used to build scalable backend services, APIs, and real-time applications.

    • Python

      Versatile language used for backend services, automation, data processing, and AI/ML development.

    • Flask

      Lightweight Python web framework used for building APIs and web services with minimal overhead.

    • FastAPI

      Modern, high-performance Python framework for building APIs with automatic docs and type validation.

    • Go

      Compiled language used for building fast, concurrent backend services and infrastructure tooling.

    • Airflow

      Workflow orchestration platform used to author, schedule, and monitor data pipelines.

    • Kafka

      Distributed event streaming platform used for building real-time data pipelines and messaging.

    • Graphql

      Query language for APIs used to fetch exactly the data clients need in a single request.

    • Java

      Object-oriented language used for building robust, large-scale backend applications.

    • Supabase

      Open-source Firebase alternative providing a Postgres database, auth, and instant APIs.

    • LangChain

      Framework used to build applications powered by large language models and agentic pipelines.

    • Django

      Batteries-included Python web framework used to build data-driven applications quickly.

    • PHP

      Server-side scripting language used to build and extend WordPress-based sites.

    • Strapi

      Open-source headless CMS used to model content and expose it through generated APIs.

    • Contentful

      Headless CMS used to manage structured content delivered to web storefronts.

    Mobile

    2
    • Flutter

      Cross-platform UI toolkit for building natively compiled mobile, web, and desktop apps from a single codebase.

    • Dart

      Language optimized for building fast, cross-platform apps, primarily used with Flutter.

    Database

    7
    • PostgreSQL

      Advanced open-source relational database used for reliable, scalable data storage and complex queries.

    • MongoDB

      Document-oriented NoSQL database used for flexible, schema-less data storage at scale.

    • Firebase

      Backend-as-a-service platform providing authentication, hosting, and real-time database capabilities.

    • Firestore

      NoSQL document database from Firebase used for real-time syncing across web and mobile clients.

    • Redis

      In-memory data store used for caching, session storage, and high-throughput real-time data.

    • Supabase

      Open-source Firebase alternative providing a Postgres database, auth, and instant APIs.

    • MySQL

      Open-source relational database used for transactional, structured application data.

    AI & Machine Learning

    11
    • Python

      Versatile language used for backend services, automation, data processing, and AI/ML development.

    • OpenCV

      Computer vision library used for real-time image processing and object detection applications.

    • Tensorflow

      Machine learning framework used to design, train, and deploy deep learning models.

    • Keras

      High-level deep learning API used to quickly design and train neural network models.

    • Claude

      AI model family used for reasoning, coding assistance, and agentic development workflows.

    • Gemini

      Google's multimodal AI model used for reasoning, content generation, and integration into apps.

    • Gemini AI

      Google's multimodal AI model used for reasoning, content generation, and integration into apps.

    • OpenAI

      AI platform providing large language models used for generation, reasoning, and automation.

    • LangChain

      Framework used to build applications powered by large language models and agentic pipelines.

    • YOLO

      Real-time object detection models used to train and run computer vision detectors.

    • MATLAB

      Numerical computing environment used to prototype real-time computer vision algorithms.

    Cloud & DevOps

    24
    • Firebase

      Backend-as-a-service platform providing authentication, hosting, and real-time database capabilities.

    • Docker

      Containerization platform used to package and run applications consistently across environments.

    • Kubernetes

      Container orchestration system used to deploy, scale, and manage containerized applications.

    • Terraform

      Infrastructure-as-code tool used to provision and manage cloud resources declaratively.

    • GitHub

      Code hosting platform used for version control, collaboration, and CI/CD workflows.

    • GitLab

      DevOps platform used for source control, CI/CD pipelines, and project management.

    • Amazon Web Services

      Cloud platform used for compute, storage, and managed services powering scalable applications.

    • Azure

      Microsoft's cloud platform used for hosting, identity management, and enterprise infrastructure.

    • GCP

      Google Cloud Platform used for scalable compute, storage, and AI-powered cloud services.

    • Cloud Run

      Serverless container platform on GCP used to deploy and auto-scale stateless applications.

    • Airflow

      Workflow orchestration platform used to author, schedule, and monitor data pipelines.

    • Kafka

      Distributed event streaming platform used for building real-time data pipelines and messaging.

    • Cloudflare

      Edge network and security platform used for CDN, DNS, and serverless edge computing.

    • Github Actions

      CI/CD automation built into GitHub, used to test, build, and deploy code on every change.

    • Jenkins

      Automation server used to build custom CI/CD pipelines for build, test, and deployment.

    • Nginx

      High-performance web server and reverse proxy used for load balancing and serving applications.

    • Linux

      Open-source operating system used to run and manage most production server environments.

    • Redis

      In-memory data store used for caching, session storage, and high-throughput real-time data.

    • Supabase

      Open-source Firebase alternative providing a Postgres database, auth, and instant APIs.

    • Vercel

      Deployment platform used to host and scale frontend applications with zero-config CI/CD.

    • Datadog

      Monitoring platform used for service dashboards, monitors, and tracing across distributed systems.

    • Coralogix

      Observability platform used for log analytics, real-time dashboards, and alerting on microservices.

    • New Relic

      Observability platform used for log monitoring, custom alerting, and real-time dashboards.

    • CloudFormation

      AWS infrastructure-as-code service used to define and provision cloud resources from templates.

    Testing & QA

    3
    • Playwright

      End-to-end testing framework used to automate and validate web application behavior across browsers.

    • Postman

      API platform used to design, test, and document REST and GraphQL endpoints.

    • Pytest

      Python testing framework used to write simple, scalable unit and integration tests.

    Tools & Design

    17
    • Tailwind CSS

      Utility-first CSS framework used to rapidly build custom, responsive interfaces without leaving HTML.

    • Material UI

      React component library implementing Google's Material Design for polished, accessible interfaces.

    • Figma

      Collaborative design tool used for prototyping interfaces and translating designs into code.

    • GitHub

      Code hosting platform used for version control, collaboration, and CI/CD workflows.

    • GitLab

      DevOps platform used for source control, CI/CD pipelines, and project management.

    • Bitbucket

      Git-based source code repository used for version control integrated with Atlassian tooling.

    • Git

      Distributed version control system used to track changes and collaborate on codebases.

    • Postman

      API platform used to design, test, and document REST and GraphQL endpoints.

    • Storybook

      UI development environment used to build, document, and test components in isolation.

    • FFmpeg WASM

      WebAssembly build of FFmpeg used for in-browser video and audio processing with no server needed.

    • Strapi

      Open-source headless CMS used to model content and expose it through generated APIs.

    • Contentful

      Headless CMS used to manage structured content delivered to web storefronts.

    • Shopify

      E-commerce platform used to build and extend customer-facing online stores.

    • WordPress

      Content management system used to build and customize websites and online stores.

    • WooCommerce

      E-commerce plugin for WordPress used to run product catalogs, carts, and multi-vendor stores.

    • npm

      Package manager used to publish and version shared JavaScript libraries.

    • Arduino

      Microcontroller platform used to drive servo motors and connect software to hardware.

    Management & Collaboration

    1
    • Jira

      Project management tool used to plan, track, and manage software development work.

    You've seen it all

    listerineh.dev

    Full-stack engineer building AI agents, cloud platforms and web products. Based in Quito, working remotely.

    Open to new projects

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