Frontend/Backend Developer Needed to Clean Up Messy Codebase

Fix and refactor an AI project with poor structure and bugs. Clean up codebase, improve readability and performance. · ...

We have an existing React web app that's live but running into UI bugs and performance issues.What we need help with · Fixing UI and functional bugs · Improving rendering and data-loading performance · Cleaning up and refactoring messy TypeScript code where needed ...

We are seeking an experienced JavaScript consultant to help us clean up and optimize our existing codebase. · ...

We are looking for an experienced full-stack developer to take over an existing case unboxing / gambling-style platform that requires significant backend fixes, · Fix deposit issues (credits sometimes count as 2x) · Repair and stabilize existing game modes · Finish / clean up inc ...

I need a "cleaner" coder to perform a deep dive to refactor core logic fix race conditions code audit for my mobile-first streaming platform. · ...

+h2>Job summary · React developer needed to fix bugs and performance issues in an existing React app. +h2>Responsibilities · +ul>Debug and fix broken or unreliable React components/li>+ul+ul>Resolve UI issues (layout bugs, Tailwind inconsistencies, responsive problems)/li>+ul+br+ ...

We're an agency building client apps, · client dashboards, and automation systems.This is ongoing part-time work with potential to expand. · ...

I am looking for a Replit & Cursor Engineer who can secure, clean up, and scale a fast-moving "vibe code" project. · The codebase has been built quickly using AI tools and needs a strong engineer to review architecture, improve security, clean up technical debt, and make it produ ...

+ We are looking for a proactive Lead Developer / Full-Stack Engineer to manage our live mobile app. The app uses Flutter, TypeScript and MongoDB. · + Audit the codebase. · Implement small features and bug fixes. · ...

We're looking for a long-term full-stack developer to work with us across multiple SaaS projects. · The role is not a one-shot mission. We want someone who will grow with us, · debug, improve existing systems, · and continuously ship new features. · ...

I have an existing MERN stack web application that is live but currently facing multiple technical and stability issues. I'm looking for an experienced MERN developer who can debug, fix, and stabilize the application. · ...

We are urgently looking for a senior developer to take over and complete an existing app in the fitness market. · A previous development team ghosted us mid-build. We have all current source code in GitHub,and need someone experienced who can audit, stabilize, and finish the app ...

I have an existing MERN stack web application that is live but currently facing multiple technical and stability issues. · ...

We are looking for a highly experienced full stack developer to take ownership of an existing production website and help us move it to the next level. · This is not a build from scratch project. You will be stepping into an active platform with an existing codebase built by a pr ...

I'm looking for an experienced full-stack developer to help me fix stabilize and complete a web app prototype. · ...

We are seeking an AI Engineer who is an expert with the Anthropic stack to develop an autonomous data cleaning agent. · ...

We're looking for a Senior Mobile / Web Developer to help build improve and maintain a real production product. · This is not a task-based micro job. It's ongoing work for someone who understands how products evolve over time and can handle both new development and existing codeb ...

+We're building a Voice AI platform that lets businesses deploy AI-powered phone agents with real-time appointment booking, CRM integration, and call management.We need a seasoned developer to step in as a technical partner — reviewing code, guiding architecture decisions, · clea ...

We're building a calm audio-first personal growth app for mobile and web using React + Capacitor. · We need an experienced developer to help finalize and ship the product. · ...

We are forming a small team to update a native iOS & Android messaging app. The product exists but needs modernization and stabilization. · This is not a greenfield app. Each developer will own their platform end-to-end.Update and modernize the app (SDK rot, deprecated APIs) · ...