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I'm a Full-Stack Web Developer with strong experience building modern web applications using React, Next.js, and Node.js. I specialize in creating responsive interfaces, integrating APIs, and managing data flow between frontend and backend systems. I enjoy collaborating in cross-functional teams, writing clean and maintainable code, and improving through code reviews and best practices. My experience ranges from freelance projects on Upwork/Fiverr to corporate teams, and I have also supported IT infrastructure and internal systems.…I'm a Full-Stack Web Developer with strong experience building modern web applications using React, Next.js, and Node.js. I specialize in creating responsive interfaces, integrating APIs, and managing data flow between frontend and backend systems. I enjoy collaborating in cross-functional teams, writing clean and maintainable code, and improving through code reviews and best practices. My experience ranges from freelance projects on Upwork/Fiverr to corporate teams, and I have also supported IT infrastructure and internal systems.

DOUGLAS A MARQUEZ SVIZZERO

Web Developer, Front-End Developer, Full Stack Developer, +2

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I'm a Full-Stack Web Developer with strong experience building modern web applications using React, Next.js, and Node.js. I specialize in creating responsive interfaces, integrating APIs, and managing data flow between frontend and backend systems. I enjoy collaborating in cross-functional teams, writing clean and maintainable code, and improving through code reviews and best practices. My experience ranges from freelance projects on Upwork/Fiverr to corporate teams, and I have also supported IT infrastructure and internal systems.…I'm a Full-Stack Web Developer with strong experience building modern web applications using React, Next.js, and Node.js. I specialize in creating responsive interfaces, integrating APIs, and managing data flow between frontend and backend systems. I enjoy collaborating in cross-functional teams, writing clean and maintainable code, and improving through code reviews and best practices. My experience ranges from freelance projects on Upwork/Fiverr to corporate teams, and I have also supported IT infrastructure and internal systems.

Available to hire

I’m a Full-Stack Web Developer with strong experience building modern web applications using React, Next.js, and Node.js. I specialize in creating responsive interfaces, integrating APIs, and managing data flow between frontend and backend systems.

I enjoy collaborating in cross-functional teams, writing clean and maintainable code, and improving through code reviews and best practices. My experience ranges from freelance projects on Upwork/Fiverr to corporate teams, and I have also supported IT infrastructure and internal systems.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Work Experience

Frontend Web Developer at XSingularity

July 1, 2023 - January 1, 2025

Developed and maintained responsive web applications using React, Next.js, TypeScript, and Node.js. Integrated REST APIs and handled data flow between frontend and backend systems. Collaborated with team members to implement new features, resolve issues, and improve performance and maintainability following best practices. Participated in code reviews to ensure code quality.

Frontend Developer at Freelance (Upwork/Fiverr)

January 1, 2018 - January 1, 2022

Built multiple web applications including dashboards, landing pages, and real-time features. Worked directly with clients to deliver scalable and user-focused solutions.

IT Analyst at Grupo Satvicos

January 1, 2023 - Present

Provided technical support, improved system performance, and contributed to web development projects.

IT Systems Specialist at Grupo Esvizzero Bienes Raíces

January 1, 2016 - January 1, 2023

Maintained IT infrastructure and supported internal systems and users.