We are looking for an experienced full-stack developer with strong expertise in React Native and backend development to help identify, troubleshoot, and resolve several issues in our production mobile application. The application is already live, but users are experiencing intermittent problems related to API communication, authentication, and data synchronization. The ideal candidate should be comfortable analyzing both the React Native frontend and the backend services to determine the root cause of bugs rather than simply applying temporary fixes. Your responsibilities will include reviewing the existing codebase, debugging REST API requests and responses, identifying issues related to authentication (JWT/OAuth), investigating server-side errors, optimizing database queries where necessary, fixing inconsistent data returned by the APIs, and ensuring proper error handling throughout the application. You will also be expected to diagnose performance bottlenecks, improve response times, resolve crash reports, and ensure seamless communication between the mobile client and backend services. Experience with Node.js, Express.js or NestJS, PostgreSQL or MongoDB, Firebase, Git, and API testing tools such as Postman is highly desirable. In addition to resolving the current issues, we expect clean, maintainable code that follows industry best practices. Please document the problems you identify, explain the solutions implemented, and provide recommendations for preventing similar issues in the future. Strong debugging skills, attention to detail, and excellent communication are essential. This project may lead to long-term collaboration for future feature development, maintenance, and application enhancements if the initial engagement is successful.

Browser-based tool/app that uses the microphone to detect volume levels and triggers a visual change on screen when a threshold is exceeded — similar to classroom noise-level apps.

We're a wearable startup building light-therapy eyewear with a companion mobile app. Our designs currently exist as .html mockups, working code and rendered screens — with a fully defined token system (color, typography, spacing, radii) already in place. We need an experienced Figma designer to translate this into a proper Figma design system that our external vendors can work from. This is NOT a "redraw these screens" job. We're looking for someone who thinks in systems and will build: • Figma variables mapped to our existing design tokens (colors, spacing, type scale, radii), including light/dark modes • A component library with proper variants, auto layout, and sensible naming — buttons, inputs, cards, sheets, navigation elements, etc. • Text and effect styles wired to the variable system • Key app screens assembled from those components (roughly 15–25 screens across onboarding, pairing, and the main daily-use flow) • A published team library, organized so third-party vendors can consume it cleanly You'll work from our rendered designs plus direct access to the token definitions, so no guesswork on values — the job is smart translation and Figma architecture, not visual invention. Ideal candidate: • Deep fluency with Figma variables (not just styles), component variants, and auto layout • Has built or maintained a design system consumed by multiple teams or vendors • Understands mobile app patterns (iOS/Android conventions) • Communicates clearly and asks good questions about structure before building To apply, please include: 1. A link to a Figma design system you've built (view access or screenshots of the variable/component structure — we want to see how you organize, not just how it looks) 2. Briefly: how would you decide what becomes a variable vs. a style vs. a hardcoded value? Scope: fixed-price preferred; we'll define milestones together (foundation/variables → core components → screens → library polish). Ongoing maintenance work possible for the right person.

We are commissioning the development of a web application to replace our existing Excel-based Security Maturity Assessment tool. The application should provide a user-friendly interface for conducting assessments, generating reports, and tracking progress over time. It should also include features for data import and export, and support for multiple users with different roles. The ideal candidate or firm will have experience in web application development, user experience design, access controls, and deploying using AWS or AWSGov cloud. The application should be modern and use the latest in web design. We are looking for a candidate or firm that can use Claude Code or Codex for efficient software design and deployment.

We are seeking a skilled developer to build our Comment Sold website and app. The ideal candidate will have experience in web and app development, with a strong understanding of PHP and JavaScript. The project involves creating a platform that integrates with Comment Sold, requiring attention to detail and a commitment to quality. If you have a passion for building innovative solutions and a proven track record in similar projects, we would love to hear from you.

Description: I’ve built an MVP for a product builder—an app that lets users create websites, apps, and AI-powered products interactively. I used Lovable to generate the initial front end, which is about 30-40% complete. Now, I need a skilled developer to take the project further—expanding the back end, integrating interactivity, and making it more like Polsia in terms of task-driven creation. What I need: Integrate or build the back-end logic (potentially serverless or cloud functions). Enhance interactivity so users can create tasks and see the process, similar to Polsia. Ability to work with or refactor the code generated by Lovable.

Project Overview I am a first-grade teacher looking to build a standalone browser-based classroom behavior management system for my interactive SmartBoard. The visual design has already been completed. I am looking for a developer to build the application while preserving the supplied artwork exactly. The application should run full-screen in Chrome, Edge, and Safari and should not require installation or a cloud account. The system should automatically save student progress in the browser.

I am developing a new Windows-based accessibility application designed to make technology significantly easier for older adults to use This is an early-stage, confidential project. I am looking for one developer to complete an initial paid prototype and, if the relationship works well, potentially continue through additional development phases. Preferred experience: SaaS application development, subscription-based software, white-label platforms, user/account management, and Windows desktop applications.

SEEKING HIGHLY MOTIVATED US DEVELOPERS / AMERICAN CITIZENS ONLY! Full-Stack and Mobile Developers needed for Back-end, Front-end, and Mobile development. We are seeking AMERICAN developers who have strong skills in PHP, Python, Java, Javascript, React, Vue.js, Typescript and Flutter. Both Web application and Mobile application development work available. Experience with data scraping / data analysis is a plus. Must have excellent command of Linux, SQL, and Git. No slackers, no agencies, no middlemen, no "teams". Please be the person you claim to be, and please be the individual who proposes to do the work. Serious candidates only. *NO VIBE-CODERS* *NO WINDOWS USERS* Please be a Mac or Linux user for your personal machine. You must be able to connect to our Linux servers and ready to hit the ground running with no issues. You must be motivated, enthusiastic, and ready to get to work. Must be willing to have brief 20-minute VIDEO interview. Be ready to bring your A-game! THIS JOB IS AVAILABLE FOR U.S. CITIZENS ONLY.

We are an enterprise retail technology firm preparing a high-level pilot presentation for global retail brands and distribution partners. We are seeking an elite, senior UI/UX product designer to create a fully interactive, hyper-polished, high-fidelity iPad Pro interface prototype for a next-generation retail counter smart-kiosk application.The aesthetic of this project must be strictly high-class minimalism (clean typography, elegant dark-mode interfaces, and fluid screen-to-screen transitions).Deliverables:• Complete UI component library in Figma (colors, type styles, adaptive components).• A fully linked, clickable interactive prototype ready to demonstrate user flows live on a physical iPad Pro across a 5-screen framework.Note: Our venture operates in strict stealth mode ahead of patent filing. All contractors must execute our corporate NDA prior to receiving the full technical project brief. Please submit a link to your portfolio highlighting your cleanest, most sophisticated user interfaces.