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I will build a modern web app with react next and node
Juan B
About this gig
I build modern, reliable full-stack web applications tailored to your business needs.
I can help you turn an idea, Figma design, or existing project into a functional web application using technologies such as React, Next.js, TypeScript, Node.js, NestJS, Python, and modern databases.
My services can include:
- Responsive frontend development
- Full-stack web application development
- REST API development and integration
- Authentication and user management
- Database integration
- Admin panels and dashboards
- Bug fixing and feature development
- Deployment and cloud integration
- Clean, maintainable source code
I have 6+ years of software development experience working on fintech, banking, enterprise, and mobile products. I am comfortable working independently or collaborating with existing development teams.
I focus on clean code, good communication, usability, performance, and building solutions that are easy to maintain and scale.
Please contact me before placing an order so we can discuss your requirements, scope, timeline, and the best technical approach for your project.
Get to know Juan B
Juan B
Senior FullStack and Mobile Developer
- FromAustralia
- Member sinceApr 2026
- Avg. response time1 hour
Languages
English, Spanish
I am a Senior Full-Stack & Mobile Developer with 6+ years of experience delivering scalable web and mobile applications across fintech, banking, and enterprise. I specialize in the modern JavaScript ecosystem—React, Next.js, Node.js, and NestJS—with strong React Native and native iOS and Android development skills. I have a proven track record designing RESTful APIs and building cloud architecture on AWS.
FAQ
Can you work with an existing codebase?
Yes. I can review and work with an existing codebase, fix bugs, add new features, improve structure, or continue development while following the current project architecture and coding standards.
Can you integrate third-party APIs?
Yes. I can integrate REST APIs and third-party services such as authentication providers, payment services, cloud platforms, external business systems, and other API-based services.
Do you provide deployment support?
Yes. I can help with deployment and environment configuration, including services hosted on AWS or other cloud platforms, depending on your project requirements.
Can you work from Figma designs?
Yes. I can convert Figma designs into responsive and functional web interfaces using React, Next.js, TypeScript, mobile apps and modern UI practices while keeping the implementation close to the original design.
Can you build both the frontend and backend?
Yes. I can develop the frontend, backend, REST APIs, database integration, authentication, and the connection between all parts of the application.
Can you add features to an existing application?
Yes. I can add new modules, screens, API integrations, business logic, dashboards, user management, and other features to an existing application.
What technologies do you work with?
My main stack includes Swift, kotlin, react native, React, Next.js, TypeScript, Node.js, NestJS, Python, Django, Flask, PostgreSQL, MySQL, MongoDB, REST APIs, Git, and AWS. My CV reflects this full-stack background across web, backend, cloud, and mobile projects
Will I receive the source code?
Yes. Source code is included according to the selected package, and the project will be delivered through a Git repository or another agreed method.
Do you offer revisions?
Yes. Revisions are included depending on the selected package. They cover adjustments within the originally agreed scope.
Should I contact you before ordering?
Yes, especially for medium or large projects. Please send me your requirements, designs, existing codebase if applicable, and expected functionality so I can confirm the scope, timeline, and appropriate package before you order.
