Software Developer

I'm Alexander, a full stack software developer from Medellin, Colombia, with 3+ years of experience building web products and improving systems that need to perform better.

Work Experience

  1. Full stack software developer

    LegalApp

    I have worked on the overall improvement of key LegalApp products, with a focus on performance, scalability, and user experience. I optimized bottlenecks in the application and database, reorganized important parts of the logic to make the codebase more sustainable and less risky to change, and improved mobile synchronization to reduce network usage and make it much faster even with poor signal. I also built background import flows to support large data migrations from previous platforms and helped simplify web and mobile interfaces so the system felt clearer, lighter, and easier to use from the start.
  2. Web developer

    Talent.com

    I improved data extraction processes that used to be slow, unstable, and hard to maintain, turning tasks that could take hours into work that finished in minutes. I also helped reorganize the code so it became more reliable, easier to update, and more efficient in its resource usage, which made fixing errors or adapting changes much faster. In addition, I worked closely with the team to solve complex problems and improve the overall quality of development.
    • Gabriela Acosta
      Gabriela Acosta
      Team manager

      Alexander is a programmer with solid technical skills, impeccable performance, and excellent problem-solving abilities. In addition, Alexander is a person of integrity, with ethical and moral values, responsible and friendly. I definitely recommend him for any work team where he can be valued and respected.

Projects

One Anime

One Anime

  • Next.js
  • NodeJS
  • ExpressJS
  • PostgreSQL

Anime web application created with Next.js (frontend) and Node.js/Express (backend). It uses web scraping to feed a PostgreSQL database in Supabase and image management with Cloudflare R2.

AI Chat

AI Chat

  • AstroJS
  • Llama 3
  • Tailwind CSS

Chatbot that runs on your own computer for private conversations, without using the cloud or external APIs, using a language model based on Llama 3 and using AstroJS.

Users Dashboard

Users Dashboard

  • ReactJS
  • Tanstack
  • Tailwind CSS
  • Vitest

User management dashboard in React using native hooks, useContext, Tanstack Query and custom hooks. UI created with Tailwind and animations with ViewTransitions API. Tests implemented with Vitest.

About me

I like to understand problems well before solving them, break them down, and move forward with judgment. When I work on something new, I usually make a plan and iterate until I find a solid solution.

I value clarity, constant learning, and teams where ideas are genuinely shared. Over time I have also learned that the most complex solution is not always the best one: in most cases, it is more valuable to build something simple, well thought out, and easy for everyone to understand.

I especially enjoy it when a problem ends up well solved or when we reach a good solution through teamwork.

Alexander Calle

Value I bring

I bring technical judgment, attention to detail, and a way of working focused on understanding the problem well, proposing a good solution, and turning it into something useful, maintainable, and well built.

GitHub Activity

@JLex11

Contributions over the last year

4,259 contributions