
Full-Stack Developer Needed for Existing Web Application
- or -
Post a project like this29
$3.5k
- Posted:
- Proposals: 43
- Remote
- #4508052
- Open for Proposals
Full-Stack Web & Mobile App Developer With AI Integration & Automation Expertise | Top Rated

Advanced AI & Custom Development | Built Platforms, Python & Plugins |Laravel & ReactJS | Bespoke Development

Fullstack web & App developer Claude Master | Agentic Software engineer| Automation | Top rated developer & AI engineer
AI Engineer | Machine Learning |Full-Stack Web Developer| Computer Vision | Generative AI

2060139118184565623148133433481349426512903820330617413505438143299129879551224529812876072
Description
Experience Level: Expert
I am looking for an experienced Full-Stack Developer to help improve and expand an existing web application.
The application is already built and currently requires additional development work, including new feature implementation, backend improvements, frontend updates, performance optimization, and technical improvements.
The goal of this project is to continue developing the platform, improve its stability, and prepare it for future growth.
Scope of work:
Develop new frontend features
Improve existing backend functionality
Create and update APIs
Work with database operations
Optimize application performance
Fix existing issues and improve workflows
Integrate third-party services where required
Review the current codebase and suggest improvements
Required experience:
Strong experience with JavaScript / TypeScript
Experience with frontend frameworks such as React or Next.js
Backend development experience with Node.js or similar technologies
Database experience (PostgreSQL preferred)
Experience working with APIs and existing applications
I will provide the current project details, technical requirements, and documentation after initial discussion.
Please share:
Similar projects you have worked on
Your experience with similar web applications
Estimated timeline and availability
The application is already built and currently requires additional development work, including new feature implementation, backend improvements, frontend updates, performance optimization, and technical improvements.
The goal of this project is to continue developing the platform, improve its stability, and prepare it for future growth.
Scope of work:
Develop new frontend features
Improve existing backend functionality
Create and update APIs
Work with database operations
Optimize application performance
Fix existing issues and improve workflows
Integrate third-party services where required
Review the current codebase and suggest improvements
Required experience:
Strong experience with JavaScript / TypeScript
Experience with frontend frameworks such as React or Next.js
Backend development experience with Node.js or similar technologies
Database experience (PostgreSQL preferred)
Experience working with APIs and existing applications
I will provide the current project details, technical requirements, and documentation after initial discussion.
Please share:
Similar projects you have worked on
Your experience with similar web applications
Estimated timeline and availability
Zaide L.
0% (0)Projects Completed
-
Freelancers worked with
-
Projects awarded
0%
Last project
8 Jul 2026
Brazil
New Proposal
Login to your account and send a proposal now to get this project.
Log inClarification Board Ask a Question
-

One question: Is the application currently in active use by real users, or is it in a pre-launch state, as that determines how carefully we need to manage deployments and what level of testing coverage should be in place before shipping new features?
1158232
We collect cookies to enable the proper functioning and security of our website, and to enhance your experience. By clicking on 'Accept All Cookies', you consent to the use of these cookies. You can change your 'Cookies Settings' at any time. For more information, please read ourCookie Policy
Cookie Settings
Accept All Cookies