Deiber Chacon
Alajuela, Costa Rica
Deiber Chacon
Senior Full-Stack Engineer | Costa Rica (CST)
Category : Web development
I am a senior developer based in Costa Rica, offering a full 8-hour daily overlap with EST/CST teams. If you are tired of losing development velocity to 12-hour communication delays, I provide the real-time collaboration your sprint needs.
What I deliver to your product:
- Modern Full-Stack Mastery: Expert-level development using React, Node.js, and TypeScript to build scalable, production-ready applications.
- Data-Driven UX via A/B Testing: I eliminate guesswork in the design process. By implementing rigorous A/B testing, I use real user data to identify which UX changes actually increase engagement, reduce friction, and drive conversions. Every UI update is backed by statistical significance, ensuring your product evolves based on what users actually do, not just what they say.
- Performance Optimization: I focus on building high-speed, responsive interfaces that keep users in the "flow," reducing bounce rates and improving overall satisfaction through technical efficiency.
- Professional Reliability: I prioritize English-first communication, thorough documentation, and a "Proof of Work" approach that keeps stakeholders informed and confident
What I deliver to your product:
- Modern Full-Stack Mastery: Expert-level development using React, Node.js, and TypeScript to build scalable, production-ready applications.
- Data-Driven UX via A/B Testing: I eliminate guesswork in the design process. By implementing rigorous A/B testing, I use real user data to identify which UX changes actually increase engagement, reduce friction, and drive conversions. Every UI update is backed by statistical significance, ensuring your product evolves based on what users actually do, not just what they say.
- Performance Optimization: I focus on building high-speed, responsive interfaces that keep users in the "flow," reducing bounce rates and improving overall satisfaction through technical efficiency.
- Professional Reliability: I prioritize English-first communication, thorough documentation, and a "Proof of Work" approach that keeps stakeholders informed and confident
Working hours
- Monday:08h00 To 18h00
- Tuesday:08h00 To 18h00
- Wednesday:08h00 To 18h00
- Thursday:08h00 To 18h00
- Friday:08h00 To 18h00
- Saturday:Not available
- Sunday:Not available
- Built and deployed over 800 front-end custom coded experiments via A/B testing platforms, achieving an 80% win rate for high-traffic websites, boosting conversion rates and user engagement.
- Designed and developed two Agentic AI tools that automated large-scale page estimation, reducing manual workload by 99%.
- Contributed to web accessibility initiatives for global enterprise internal tools.
- Collaborated with multiple stakeholders and clients in development projects (React.js, Shopify, A/B Testing), and leading development and QA teams.
- Mentored junior developers to foster their growth and become valuable team members.
- Designed and developed two Agentic AI tools that automated large-scale page estimation, reducing manual workload by 99%.
- Contributed to web accessibility initiatives for global enterprise internal tools.
- Collaborated with multiple stakeholders and clients in development projects (React.js, Shopify, A/B Testing), and leading development and QA teams.
- Mentored junior developers to foster their growth and become valuable team members.
- Developed over 30 modules for a full-stack tourism platform used by partners across LATAM.
- Architected and built their current human resources web application, reducing manual work by 90%.
- Built web service APIs to enable platform-wide data access and sharing.
- Suggested and implemented their CI/CD workflow.
- Developed a mobile app for tourists with offline capabilities.
- Architected and built their current human resources web application, reducing manual work by 90%.
- Built web service APIs to enable platform-wide data access and sharing.
- Suggested and implemented their CI/CD workflow.
- Developed a mobile app for tourists with offline capabilities.
- Developing Apps for Shopify 01/11/2025
![Developing Apps for Shopify]()
- Shopify Development Fundamentals 31/10/2025
![Shopify Development Fundamentals]()
- Dynamic Yield Personalization Technical Expert 04/07/2024
![Dynamic Yield Personalization Technical Expert]()
- Dynamic Yield Personalization Business Expert 04/07/2024
![Dynamic Yield Personalization Business Expert]()
- 🇬🇧 English
- 🇪🇸 Spanish
Please sign in as a customer to give your feedback
Need a service ?
Do you want to hire the services of this Professional ?
Post your need and you will receive dozens of proposals from the Professionals of the community.
