Skip to content
Profile photo

David Castrillón Gonzales

Full-stack Developer

Available

8+ years of experience

Full-stack developer specialized in frontend with React and TypeScript. I design and build fast, accessible, and maintainable user interfaces.

Also experienced with Go, Node.js, and Java and test automation using Selenium and Appium, enabling end-to-end collaboration.

About me

I am passionate about programming and continuous learning. I believe knowledge should be shared, and I enjoy learning with others and teaching what I learn.

I work well in teams, embrace challenges, and remain calm when making decisions to find effective solutions.

Committed to improving software quality and delivering real value to customers.

Work Experience

  1. Yuno - Sr Frontend Developer

    Present

    Implemented the reconciliation module as microfrontends (single-spa) within the dashboard. React, TypeScript, and Material UI on the frontend; Kotlin on the backend. Improved scalability and delivery times.

  2. Conekta - Sr Frontend Developer

    Maintained and evolved the back-office application; shipped new features and UX/DX improvements. React, TypeScript, Material UI/Chakra UI on the frontend; Go and Node.js on the backend.

  3. Mercado Libre - Software Development SSr Analyst

    Migrated the insurance application to TypeScript and React; collaborated with multidisciplinary teams.

  4. Bancolombia - Software Engineer

    Web, mobile, and service test automation (Selenium, Appium, Rest Assured, Screenplay, Cucumber) and batch processes using Java/AS400. Led testing teams and defined testing strategies.

  5. Accenture - Analyst

    Web, mobile, and service test automation using Selenium, Appium, Rest Assured, Screenplay, and Cucumber.

  6. Tenebit - Frontend Developer

    Web application development using Ionic and AngularJS to manage and customize the CRM experience.

Projects

Landing Page with CMS

Multilingual landing page (ES/EN/FR) with integrated Decap CMS, contact form via Resend, and static deployment on Vercel. No subscriptions, 100% open source.

Screenshot of Landing Page with CMS

4×1000 Tax Calculator

Web tool to calculate Colombia's Financial Transactions Tax (GMF): compute the charge on a transaction or the deposit needed to stay within the tax-exempt threshold.

Screenshot of 4×1000 Tax Calculator

JSON CV Manager

CLI tool to manage your CV as code using the JSON Resume schema. Generates ATS-friendly PDFs, validates content, and lets you create tailored variants per application without touching Canva.

Screenshot of JSON CV Manager

Info Colombia

Open-source project consuming API Colombia to explore the country's geography, history, tourist attractions, and presidents, with a focus on performance and accessibility.

Screenshot of Info Colombia