MERN App Bug Fix & Features

I have a production MERN application that has begun showing functionality bugs and noticeable slow-downs under load. I need a developer who can dive into the existing MongoDB, Next, React, and Node.js codebase, trace the root of those issues, and optimise both the server and client so response times return to normal.

Alongside stabilising the app, I also want to move the product forward. A handful of new features are already scoped in Figma and Jira, and several external APIs must be connected so we can expand our data sources and prepare for future payment-related work. I will walk you through the backlog on our kick-off call and grant access to a private Git repository plus detailed Postman collections.

Deliverables
• Resolve all current functionality bugs (error logs supplied).
• Improve performance to meet existing Lighthouse benchmarks.
• Build the first wave of new features; clean, well-commented code and reusable React components expected.
• Integrate the specified REST/GraphQL APIs and document each endpoint.
• Submit a concise changelog and open a pull request for review; no direct commits to main.

Acceptance criteria will be the successful merge of your branch after unit tests pass in our CI pipeline and the staging build is signed off by QA.

If you are comfortable working with GitFlow, webpack, and modern React (hooks, context, TypeScript optional), let’s talk.