Julio César Díaz

Experience

• 2024 - Present

  Front End Developer @ Second Window

  Alicante, Spain - Remote

  Summary:

  • Lead front-end development for AI-powered educational platforms and cloud infrastructure visualization tools.

  Responsibilities:

  • Lead front-end architecture decisions and establish development standards
  • Design scalable React applications with TypeScript and modern tooling
  • Integrate third-party services including Azure AD, Stripe, and cloud APIs
  • Implement comprehensive testing strategies with Jest and React Testing Library
  • Collaborate with backend teams on API design and integration patterns

  Achievements:

  • Delivered cloud infrastructure design tool enabling visual architecture deployment
  • Implemented real-time cost calculation system for multi-cloud providers
  • Established front-end development standards improving team efficiency by 40%

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  • React
  • Next.js
  • TypeScript
  • Tailwind CSS
  • Zustand
  • XYFlow
  • Azure AD
  • Stripe API
  • Jest
• 2024 - 2024

  Web Developer @ Freelancer

  Alacant, Spain - Remote

  Summary:

  • Developed and deployed a comprehensive sports betting platform with real-time data integration.

  Responsibilities:

  • Architect and develop React-based betting platform from concept to deployment
  • Implement secure authentication flows using AWS Cognito
  • Design responsive UI components with Tailwind CSS and Shadcn
  • Integrate real-time sports data APIs for live betting functionality
  • Establish testing frameworks and maintain high code quality standards

  Achievements:

  • Delivered production-ready betting platform within 6-month timeline
  • Implemented scalable architecture supporting future feature expansions
  • Optimized application performance achieving sub-2s load times

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  • React
  • TypeScript
  • Tailwind CSS
  • AWS Amplify
  • AWS Cognito
  • Jest
  • Shadcn
• 2023 - 2024

  Web Developer / IT Specialist @ Legacy BHC

  West Palm Beach, United States - On-site

  Summary:

  • Developed enterprise-level internal tools for employee management and certification tracking systems.

  Responsibilities:

  • Develop internal applications for certification and vacation management
  • Translate Figma designs into responsive React components
  • Implement testing strategies and maintain code quality standards
  • Manage AWS deployments and maintain application infrastructure
  • Provide IT support including Active Directory and Office 365 administration

  Achievements:

  • Streamlined employee certification tracking reducing manual processes by 60%
  • Delivered pixel-perfect UI implementations from complex design specifications
  • Maintained 99.9% system uptime across all managed applications

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  • Next.js
  • TypeScript
  • Tailwind CSS
  • MongoDB
  • AWS
  • Jest
  • Figma
• 2019 - 2021

  Web Developer & IT Specialist @ ETECSA

  Santa Clara, Cuba - On-site

  Summary:

  • Developed telecommunications management systems and employee feedback platforms for regional operations.

  Responsibilities:

  • Develop internal tools for telecommunications and employee management
  • Implement responsive UI components with React and Tailwind CSS
  • Collaborate on API integration with Django backend systems
  • Maintain legacy codebases and ensure system reliability
  • Participate in code reviews and quality assurance processes

  Achievements:

  • Delivered telecommunications management system serving 10,000+ users
  • Improved employee feedback collection efficiency by 50%
  • Maintained zero-downtime deployments across all managed systems

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  • React
  • JavaScript
  • Tailwind CSS
  • Django
  • MongoDB
  • Jest
  • Git