Duvan Gallego

AI-First Senior Full-Stack Developer with 15+ years of software development experience and nearly two decades in the technology industry. I build and scale production software with React, Node.js, Python, and Java. Currently, I leverage AI-driven methodologies, utilizing tools like Claude, Codex, and coding agents throughout the development process, from architecture and implementation to debugging and testing.

I have built systems serving millions of users and enjoy solving hard engineering problems, learning new things, and building ambitious products with small, capable teams.

AI-First Senior Full-Stack Software Developer at Medeloop (2025-01 – Present)

AI-powered platform for scientific and clinical research

• Built and scaled features across Analytics, Grants, Notebooks, and Care using React, Node.js, and Python, improving reliability, performance, and user experience.
• Led the development of the Notebooks product from the ground up, enabling no-code, reproducible, and privacy-preserving analysis workflows for scientific users.
• Developed and integrated multiple AI-driven features and agentic workflows for grant writing, study execution, and real-time analytics.
• Collaborated closely with product and research teams to translate complex scientific workflows into modular, automated tools.
• Designed and built authentication and authorization systems from scratch, improving security, access control, and permission management.
• Built a new admin and platform management system to support internal operations, configuration, and monitoring.
• Stabilized and matured existing products, improving production readiness, reliability, and maintainability.

Software Developer / Senior Software Developer at GoTo (2019-09 – 2024-12)

Unified communication and IT management software. Promoted to Senior Software Developer in March 2022.

• Built end-to-end support for unlimited licensing across the front-end, BFF, and back-end, allowing customers to scale usage without licensing constraints.
• Collaborated on the integration of WhatsApp into the GoTo app, contributing to product adoption and sales growth in Latin America.
• Developed the GoTo Engage product from the ground up as a full-stack developer and Scrum Master; it served nearly 1,000 paying customers with a growing user base.
• Migrated a GoTo permissions module handling 100,000+ requests per minute from a monolithic system to an independent Java/PostgreSQL microservice, improving performance by 60% through request, query, and cache optimization.
• Migrated and consolidated the GoTo Admin app from AngularJS to React using a micro-frontends architecture, improving performance by 150% and increasing user engagement by 30%+ while enhancing maintainability, stability, and developer experience.
• Supported, maintained, and developed SaaS products and services, maintaining up to 99.98% availability and following SaaS best practices through a monthly on-call rotation.

Front-End / Web UI Developer at Globant (2017-07 – 2019-06)

IT and software development company

• Built the foundation for BBVA’s Argentina mobile app using Web Components and Ionic; it later evolved into a production app supporting thousands of users.
• Built React-based dashboards to support client business processes.
• Migrated StarMeUp from BackboneJS and AngularJS to React, improving UX and reducing average load time from 4 seconds to about 1 second; created 200+ components now used in an HR suite serving 500,000+ users.
• Implemented a Java back-end service and front-end support for GIF image optimization, increasing image feature usage by 40% and app engagement by 3%.
• Optimized and supported the initial StarMeUp version using BackboneJS, MarionetteJS, and AngularJS.

M.Sc. in Software Engineering and Computer Systems – UNIR, Spain (2018 – 2018)

B.Sc. in Systems Engineering – University of Medellin, Colombia (2015 – 2015)

Technician in Computer Analysis and Programming – ATEC, Colombia (2006 – 2006)