Win32 App Development Projects

opportunity

Full Stack MERN Developer and React Native app Developer Req

We are looking for an experienced full stack MERN developer (MongoDB, Express, React, Node.js) with experience in React Native mobile apps to build a complete event management and booking system. The project will include web and mobile platforms, a robust admin panel, and a role-based user system (Admin, Organizer, User). This system will be used to manage events, bookings, and users efficiently. The goal is a scalable, secure, and user-friendly solution suitable for the Pakistan market, with potential to expand internationally. Key Features 1. Roles & Permissions Admin: Full control of the system Approve/reject events Manage users and organizers (block/unblock) View all bookings Dashboard with analytics (events, users, revenue) Organizer: Can create and manage events Add event details, dates, pricing, and seats View bookings for their events User: Can browse events and book tickets Track booking history Manage profile 2. Event Management Event creation, update, and deletion (Organizer) Admin approval workflow for events Event categories and search/filter functionality Image uploads for events 3. Booking System Ticket booking with seat management Booking confirmation and history Payment integration (Stripe/PayPal optional for MVP) Real-time seat availability 4. Dashboards Admin Dashboard: Analytics, user management, event approval Organizer Dashboard: Events overview, bookings User Dashboard: Booked events and personal info 5. Web & Mobile Web: React + Tailwind CSS or Material UI Mobile: React Native (iOS and Android) Responsive, intuitive UI/UX 6. Backend Node.js + Express API MongoDB with Mongoose JWT authentication Role-based access control middleware Logging and error handling Tech Stack Frontend (Web): React.js Frontend (Mobile): React Native + Expo Backend: Node.js + Express.js Database: MongoDB (Atlas or local) Authentication: JWT Hosting: Vercel / Railway / Heroku (for web) Payment Integration: Optional for MVP (Stripe/PayPal) Deliverables Fully functional MERN backend with all APIs React frontend for web with dashboards and pages React Native mobile app (iOS + Android) Role-based authentication and admin panel Deployment instructions and source code on GitHub Documentation for APIs and system architecture Preferred Developer Qualifications Proven experience with MERN stack projects Strong knowledge of React Native and mobile app best practices Experience building role-based systems and dashboards Familiarity with payment integrations is a plus Good communication and availability for updates Project Timeline Estimated delivery: 6–12 weeks depending on complexity Clear milestones for backend, frontend, mobile, and deployment How to Apply Please provide: Examples of previous MERN + React Native projects Estimated timeline and cost Any suggestions for improving project workflow

opportunity

Mobile App Developer for Matching Platform (Android and Apple)

We are looking for a mobile app developer to build a matching platform for iOS and Android. The app will include user profiles, a matching system, chat, and a clean, user-friendly design. The ideal candidate has experience with mobile development and has built similar apps before. Please share your portfolio and timeline. Thanks, Sydney

opportunity

Package Web app for use on App Stores

Project Overview I have a fully functional web application built with React, Tailwind CSS, and TypeScript. I am looking for an expert to package, optimise, and deploy this application across all major Smart TV ecosystems. The goal is a seamless "10-foot UI" experience that feels native on television hardware. Scope of Work • Porting & Packaging: Wrap the existing React web app for deployment on: • Android-based: Amazon Fire TV/Stick, Google TV, Android TV. • Web-based OS: Samsung (Tizen), LG (webOS), Hisense (Vidaa), Vizio (SmartCast). • Proprietary: Apple TV (tvOS) and Roku (Roku OS). • D-pad navigation, "Back" button behavior has already been coded into the app. • Performance Optimization: Optimize the CSS and rendering for lower-powered TV processors to ensure smooth animations and transitions. • Store Submission: Handle the technical requirements for app store packaging (icons, splash screens, configuration files) and guide the submission process. Required Experience • Frameworks: Deep experience with Capacitor, Cordova, or React Native for TV. • Roku Expertise: Specific knowledge of BrightScript or the Roku Independent Developer Kit (IDK) to port web logic to Roku OS. • TV Standards: Familiarity with hardware acceleration, memory management on TVs, and handling different aspect ratios/overscan. Technical Stack • Frontend: React, TypeScript, Tailwind CSS. • Target Platforms: Fire TV, Android TV, Apple TV, Tizen, webOS, Roku, Vidaa. Please review the project requirements thoroughly and provide a realistic proposal. Accuracy is essential; any attempt to 'placeholder bid' (e.g., bidding £300 only to later quote £2,000) will result in immediate rejection)

Training app

We want to build a app where we can have gas training multiple choice exam papers ( very smilier to the DVLA theory help app ) Learners can get a pass or fail mark, have a list of all the questions they failed To host a gas rate calculator Pipe-sizing tool I appreciate this is all industry specific, we can explain what this is - its pretty simple stuff To host videos for guidance A area where learners can email in questions for trainers to reply

Write the Post in the App and Review the App (iOS)

Small task. If you have a US Apple account (iOS devices only), you need to make the following steps: - Open Appstore on your iOS device - write "kikihub" in apple search - install app (screen is attached) - create account + upload photo - write the "post" about the recent performance/event/topical item

opportunity

Need a chatting app like WhatsApp

I need an online app where user can see online doctors and talk to them and chat with them. Application must lock the mobile id as banking app does. Patients can have a login and doctors too. When they are logged in they can see live doctors and start chatting and voice calling with them. Call will be with 20 minutes timer and call recorded feature should be there. More details will be shared with selected candidates e must be in flutter.

opportunity

SaaS Web App

I'm looking for a full stack web developer to build an HTML/CSS/JS/PHP/MySQL SaaS site. I'm looking for a professional & visually pleasing minimalistic design. The app will feature:  Landing page with app description pricing plans and login functionality Desktop and Tablet optimised. Mobile friendly especially for the landing page Registration functionality with email confirmation prior to account activation Rapid Email delivery at account registration and password reset (as rapid as can be for the shared hosting solution in use) Free tier and paid tiers of the app with multiple payment methods available (e.g. Visa, MasterCard and Google Pay etc.) Secure (e.g. data at rest and in transit will be encrypted. Shared hosting service is SSL enabled) App (once registered and logged in) will give the user the ability to change their tier from lower tiers to higher tiers. Higher tiers will allow users to invite other users. The app's basic functionality has been developed and is online.

Shopify Developer needed

Are you a Shopify developer? We are looking for a freelancer to work with us on our medical store. The ideal candidate should be well-versed in Shopify's platform and have a strong understanding of e-commerce functionalities. Tasks may include theme customization, app integration, and troubleshooting. All requirements - Images - Budget attached Please answer all requirements questions with your proposal.

opportunity

MVP Mobile App for Tradespeople Scheduling, Invoicing, Simple AI

I’m looking to build a simple MVP mobile app for tradespeople. The goal is to create a clean, easy-to-use app that helps manage day-to-day work and scheduling. Core features: Job scheduling calendar Customer database Quotes and invoices Notifications/reminders I would also like basic smart suggestions (e.g. highlighting gaps in the diary or overbooked days). This is an MVP to test the idea, so I want to keep it simple, scalable, and cost-effective. Please include in your proposal: Similar apps you’ve built Suggested tech stack Estimated cost and timeframe If the MVP is successful, there will be further work to develop the full app. Looking forward to hearing from you.

I need a system developer

I’m currently looking to connect with someone who is highly skilled in ISP systems, VPN systems development, and system hosting. Should have strong experience in building, managing, and maintaining reliably as well as deploying and hosting them efficiently. If you have experience with server management, system architecture, cloud or web hosting, and maintaining secure and scalable systems, I would be interested in working together. This could involve collaborating on current and upcoming projects that require dependable system setup, hosting, and long-term maintenance. If you’re interested, please feel free to reach out so we can discuss further. Thank you

APP GAME 4 CHILDREEN

Interested in developing a game application for children. The content is ready. The application needs video, animation and conversations, and the construction of original characters. Within the application, you can choose different languages ​​such as Arabic and English. The application with login

opportunity

Trading bot development

Project Overview We are building a high-performance, low-latency trading engine designed for microstructure-based execution strategies in a high-tax (STT) environment. This is NOT a basic retail trading bot. This system requires advanced system-level engineering, multi-core CPU architecture control, shared memory communication, and real-time observability dashboard. The focus of this project is minimizing latency between signal generation and order execution while maintaining regulatory compliance (Order-to-Trade Ratio constraints). The developer must understand low-level performance optimization, concurrency architecture, and Linux system behavior. Core Technical Requirements Python Version (Mandatory) The engine must use: Python 3.13 Free-Threaded build (3.13t) NOT standard Python 3.10–3.12 Reason: Standard Python uses the Global Interpreter Lock (GIL), which blocks true parallelism. In low-latency systems, a 1–2ms delay caused by GIL contention is unacceptable. Multi-Core Architecture with CPU Core Pinning The engine must: Assign specific modules to specific CPU cores Use os.sched_setaffinity (Linux only) Prevent OS core migration (avoid context switching) Modules include: Sentinel (Risk & OTR monitoring) Sonar (Market entropy / regime detection) Oracle (Signal calculation loop) Execution Engine (Order placement) The goal is to eliminate unpredictable latency spikes caused by OS scheduling and cache invalidation. Inter-Process Communication Standard Python queues are NOT acceptable. Communication must use: multiprocessing.shared_memory Memory-mapped buffers Lock-free ring buffer architecture Reason: Standard queues introduce locking and object allocation overhead, increasing latency. The target is sub-millisecond internal communication between signal generator and execution engine. Latency Measurement The system must measure: End-to-end order placement latency Round-trip time (RTT) Module processing time Using: time.perf_counter_ns() Latency histogram logging This data must be streamed to the dashboard. Order Execution Logic The system should: Prefer passive limit orders Include 200ms cancel logic Manage Order-to-Trade Ratio (OTR) Implement controlled order flooding logic (compliant with broker rules) This is not a simple market order bot. FRONTEND REQUIREMENTS (React Dashboard) The frontend is NOT a trading UI. It is a real-time monitoring and control cockpit. Preferred stack: React (Vite or Next.js) WebSocket for live streaming Lightweight charting (Canvas or WebGL-based) Required Dashboard Modules Sentinel Panel Real-time RTT graph 20ms lockdown threshold indicator CPU usage per pinned core Emergency status Sonar Panel Market regime indicator (Attack / Veto mode) Entropy score display Zero-trust gate status Oracle Panel Weighted Order Book Imbalance (WOBI) heatmap Liquidity imbalance % Signal strength score Must use high-performance rendering (Canvas, not heavy SVG). Execution Panel Net Expected Value (NEV) Fill rate % Cancel rate Order-to-Trade Ratio (OTR) status Emergency Kill Switch Dashboard must include: Global kill switch Sends signal to monitoring service Monitoring service writes flag to shared memory Engine halts immediately Dashboard must NOT communicate directly with broker API. Deployment Requirements Linux-based environment (Ubuntu preferred) Dockerized setup preferred Separate processes: Trading engine Monitoring microservice React frontend Google Cloud compatible. 10 MOST IMPORTANT SKILLS TO ADD Attach these skills on Freelancer: Python 3 (Advanced Concurrency & Multiprocessing) Must understand GIL, free-threaded builds, shared memory. Low-Latency System Design Experience reducing microsecond-level bottlenecks. Linux System Programming Knowledge of CPU affinity, process scheduling, performance tuning. Multithreading & Multiprocessing Architecture Designing multi-core optimized applications. Memory Management & Shared Memory IPC Experience with mmap, shared memory buffers. Financial Market Microstructure Knowledge Understanding order books, liquidity imbalance, passive vs aggressive orders. WebSocket & Real-Time Streaming Required for live dashboard data. React.js (Performance-Optimized UI) Real-time data rendering without UI lag. Performance Profiling & Benchmarking Must measure and optimize latency. Cloud Deployment (Google Cloud / Linux VM / Docker) Production-ready deployment experience. VERY IMPORTANT Add this to filter weak developers: Applicants must answer the following: Have you worked with Python shared memory or mmap before? Have you implemented CPU core pinning on Linux? How would you measure internal engine latency? How would you prevent dashboard from affecting trading engine performance? This will eliminate 80% of generic bot developers.

Mobile App Developer Needed for Livestream Social Platform

Company Description Stealth Livestream Project is an early-stage startup building a next-generation mobile livestreaming platform designed to connect creators and audiences through interactive real-time experiences. Our mission is to develop a scalable social livestream ecosystem featuring virtual gifting, real-time chat, and creator monetization tools. The project is currently operating in stealth mode while we assemble a small team of experienced engineers to build the core platform. We are seeking a highly skilled developer who is passionate about building large-scale social applications and livestream technologies. Role Description This is a remote contract role for an experienced Mobile Application Developer responsible for helping build the core mobile application for a new livestream platform. The developer will design and develop scalable mobile features including: User authentication and profiles Real-time livestream video streaming Live chat and audience interaction Virtual gifting systems In-app purchase and payment integration Creator monetization tools The developer will collaborate with the founder to build the first production version of the platform, ensuring performance, scalability, and security. All development will be managed using version control to ensure transparency and proper ownership of the project. Responsibilities • Design and develop a scalable mobile livestream application • Implement real-time streaming and chat systems • Build secure authentication and user account management • Integrate payment and in-app purchase systems • Optimize performance for large numbers of concurrent users • Collaborate on system architecture and technical decisions • Maintain clean, well-documented source code Required Qualifications • Strong experience in mobile application development • Experience building apps for Android and/or iOS • Strong knowledge of Object-Oriented Programming (OOP) • Experience with real-time systems or livestream technologies • Experience with Git version control platforms such as GitHub • Strong problem-solving and debugging skills • Ability to work independently in a remote startup environment Technical Partnership Opportunity This project is an early-stage startup developing a next-generation livestream social platform. The developer selected for this project will have the opportunity to work as a long-term technical partner. The goal is to build and launch the platform together and grow it into a scalable global product. The initial development phase will begin as a project collaboration, with the possibility of long-term partnership, revenue participation, and continued development after launch. Full project details and partnership structure will be discussed with shortlisted candidates during the interview stage. All development will be managed through repositories controlled by the project owner to ensure transparency and proper project ownership. Preferred Experience Experience building or working with social platforms similar to: • TikTok • Bigo Live • Poppo Live Knowledge of: Livestream infrastructure Realtime messaging systems Payment systems Scalable backend architecture is highly valued. Important Project Conditions • All source code and intellectual property developed for this project will belong 100% to the founder and project owner. • Development will be conducted through repositories controlled by the project owner. • The project is currently in stealth mode and full details will be shared during the interview process. Why Join This Project • Opportunity to build a large-scale livestream platform from the ground up • Work on innovative social technology • Potential for long-term collaboration and growth with the project. Application Requirement To confirm that you have carefully read the project description, please start your proposal with the word “LivestreamPro”. Applications that do not include this word at the beginning of the proposal may not be considered.

Finishing Steps To A Mobile phone app

We are developing a React Native mobile app (Expo) for an education recruitment platform (Slingshot Education). The app supports two user types: Candidates (teachers/support staff) School representatives (e.g. Headteachers, HR, office staff) The candidate side UI is largely complete. We now need a freelancer to complete backend integration and build out the school-side functionality. Candidate App (Mostly UI Complete) - Login screen (UI only) Home dashboard: Profile card (with avatar placeholder, name, email, location, preferred working areas) Availability toggle Dashboard cards (Roles This Week, Pending Docs, Status) Supply Roles tab (job listings with Apply button) Events tab (including “Meet & Greet” and other example events) Tips tab More tab: Includes the Additional Resources button & Join The Rewards Program button Navigation and Bottom tab navigation implemented App structured using Expo + React Navigation We have now introduced a second user type (school users) with a completely different dashboard and permissions. School Dashboard Must Include: Header with: Slingshot Education logo School name Welcome message Action buttons: Post a New Job Review Applications Dashboard cards: Active Jobs Applications Received Urgent Requests Sections: Upcoming bookings Recent applications Notifications / updates

opportunity

Web design and development

am currently looking for a web developer to build a new website for my business. I already have the content, logos, brochure, and a clear brief for what I want. I also have examples of a few websites I like and can share these for reference. I do have the hosting login details, along with the GoDaddy access, so everything can be transferred and picked up smoothly. I am looking for a bold, high-quality website with around 6–8 pages, including a strong homepage and a professional overall look and feel. The current web design does not reflect the standard I want for the brand.

opportunity

Building a ride-sharing app like Uber For AUSSIE

We are looking for a developer or team that has already built an app similar to Uber, which can be customized with new designs and additional features. We are open to solutions developed in Flutter or native technologies, as the apps must support both iOS and Android platforms. The project scope includes: Rider App Driver App Backend Dashboard Important Requirements: We require full ownership and control of the source code. All code must be deployed and set up on our own accounts. Before releasing the milestone payment, our local technical team will review and verify the complete codebase and setup. Please only submit a bid if you already have a working solution. We are not looking to develop this from scratch. Project Timeline: 2 months

Backend Developer

About the Role We are looking for a skilled Backend Developer to design and build scalable server-side applications. You will be responsible for developing APIs, managing databases, and ensuring high performance and responsiveness of our applications. Key Responsibilities Design, develop, and maintain backend services and APIs Build scalable and secure server-side applications Work with databases to design efficient data models Integrate third-party services and APIs Optimize applications for speed and scalability Collaborate with frontend developers, DevOps engineers, and product teams Write clean, maintainable, and well-documented code Participate in code reviews and continuous improvement processes Requirements 3+ years of experience in backend development Strong knowledge of Node.js, Python, Java, or PHP Experience building RESTful APIs or GraphQL APIs Proficiency with databases such as PostgreSQL, MySQL, or MongoDB Experience with Git and version control workflows Knowledge of authentication, security, and API design Familiarity with cloud platforms (AWS, Azure, or Google Cloud) Nice to Have Experience with microservices architecture Knowledge of Docker and Kubernetes Experience with CI/CD pipelines Familiarity with Redis, Kafka, or message queues Benefits Competitive salary Flexible working hours Remote work options Professional development opportunities Collaborative international team

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SaaS MVP development

I am looking for a developer to build an AI SaaS MVP website that’s simple, clean, and ready for real users. The idea is to launch something solid with the main features working well, and then improve it over time. The website should include basic things like user sign-up/login, a simple dashboard, and a payment/subscription setup. For the core features, I’m thinking: 1. An AI tool where users can enter text and get useful results (Will disclose in the chat) 2. A chat-style AI assistant for quick interaction 3. A way for users to save and view their past results If you have built SaaS platforms or worked with AI tools before, that would be really helpful. Feel free to share your previous work and how long you think this would take.

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Booking App

We seek an experienced mobile development team to complete a booking app from an existing raw model. Responsibilities include verifying and displaying hotel and room amenities accurately, integrating and securing required API credentials, producing installable Android (.apk) and iOS app packages, managing app store registrations under our company name, and delivering a fully functional, tested mobile application. Clear documentation, post-launch support, and adherence to platform guidelines are required. Details to be discussed in a meeting.

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Android App

I would like to develop an anroid application that l can use to monitor the activity on my children's smartphones. The app will send feedback of the apps that they have installed on their phone as well as a report of all of their notifications