Mobile App Development Projects

Create a VCARD with Design likje a APP

We need an app-style design for a virtual business card (VCARD) for a company that will have several employees. The system will only use HTML/JS/CSS. Sample images can be used. The card will have 2 parts - Front and Back. Access to the back will be via Flip/Rotate.

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Mobile App Developer Needed — Mumvault (iOS & Android MVP)

About Mumvault: Mumvault is a dual-purpose family organisation and digital legacy app. It gives families one secure place to store all their important household information — insurance, mortgages, children's details, passwords, documents — and allows users to record messages for loved ones to receive at future life moments (18th birthdays, weddings, Christmas). We are pre-launch with a live waitlist, registered trademark and strong brand already in place. What We Need to Build (MVP): User registration, login and profile (biometric/Face ID support) Secure data vault with categorised sections (home, finances, children, vehicles, documents) Document and photo upload storage Trusted person access — user nominates someone who can access the vault under defined conditions Future message scheduler — written messages (and ideally voice/video) delivered to nominated recipients at a specified future date or life event GDPR compliant UK data storage Clean, warm UI matching our existing brand (assets provided) Ideal Tech Stack: React Native or Flutter (cross-platform iOS & Android), secure cloud backend (Firebase or AWS), end-to-end encryption. About You: Proven experience building consumer mobile apps Portfolio of live iOS/Android apps (please share links) Comfortable with security-sensitive data Clear communicator — this is a founder-led project and regular updates matter Stage & Budget: This is an early-stage startup. I am open to discussing a combination of paid development and equity for the right person. Please provide a fixed-price quote for the MVP scope above and indicate your timeline.

Full-Stack Developer (Kotlin Multiplatform + SvelteKit)

We are Stuck In The Riddle Ltd, an escape room operator. We have recently finished building Riddle Ramble, an interactive, city-based escape room game app where players visit real-world waypoints to solve puzzles. The application is completely built and fully deployed, but our original development agency is winding down their operations. We are looking for a reliable, long-term freelance developer (or a tight-knit duo) to inherit the codebase, conduct a thorough initial code review, and handle ongoing maintenance, bug fixes, and future feature development. The Tech StackMobile Application: Kotlin Multiplatform (KMP) deploying to iOS and Android. Web Application (Creator Admin Dashboard): SvelteKit / JavaScript. Backend & Database: Firebase (Blaze Pay-As-You-Go Plan, utilizing Firestore, Authentication, and Cloud Functions). Hosting: Firebase Hosting (for the web app) and custom domain routing via GoDaddy. Infrastructure: Fully controlled under our own Google Cloud Organization workspace. Key Responsibilities Initial Code Review & Audit: Inherit the existing codebase from our GitHub repositories, set up a local development environment, and audit the code for stability and cleanliness. Onboarding & Configuration: Wire a local development/staging Firebase environment so updates can be safely tested before hitting the live production app. General Maintenance & Optimization: Act as our on-call developer to handle unexpected server issues, minor bugs, and OS-level update requirements (iOS/Android compliance). Future Feature Evolution: Collaborate with the business owner to plan and build new puzzle mechanics or game features over time. Candidate Requirements Proven, referenceable experience deploying live production apps using Kotlin Multiplatform (KMP). Strong proficiency in Svelte / SvelteKit and JavaScript for web applications. Production-level experience managing Firebase architecture (Firestore, Cloud Functions, Security Rules). Comfortable inheriting existing code without immediately demanding a full rewrite. Excellent communication skills in English.

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Web/App Development Support Needed

I am looking for an experienced developer to build and refine a digital platform. The project involves creating a clean, user-friendly solution with strong attention to usability, performance, and future scalability. Ideal candidates should have experience with: Mobile app development UX/UI thinking Secure and scalable architecture MVP or startup-style projects Clear communication and confidentiality Please share examples of similar projects you have worked on, your preferred tech stack, and how you usually approach confidential early-stage ideas.

Push notifications for an AI productivity PWA

I have a live Progressive Web App (herelet.me) built with React/TypeScript, Supabase, and Lovable. It's a productivity tool for ADHD users and I need push notifications so I can re-engage users when they have tasks waiting. The stack: React frontend (built via Lovable, code on GitHub), Supabase for backend/auth/edge functions. What I need: 1. Service worker setup that handles push notifications reliably without breaking existing PWA caching (I've had issues with service workers causing blank screens, so this needs to be done carefully) 2. Web Push API integration with VAPID keys stored in Supabase 3. Permission request flow that feels friendly, not aggressive — prompt after the user has completed their first brain dump, not on first visit 4. Ability to trigger notifications from Supabase edge functions (e.g. "You have 3 tasks waiting" or "Your quest is paused — ready to pick it up?") 5. Rich notifications with app icon and tap-to-open deep linking back to the relevant screen 6. Cross-browser compatibility (Chrome, Safari, Firefox) 7. Unsubscribe option in the app's Profile tab Important context: the previous service worker implementation caused caching issues that broke the app on Chrome. I need someone who knows PWA service workers well enough to avoid that happening again. Thanks in advance!

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Software Developer (AI-Assisted Product Development)

Remote | Contract / Freelance | Ongoing Engagement About Matchspace Matchspace is a growing SaaS platform helping tennis, padel, squash and pickleball clubs increase participation and simplify club management. Used by clubs across the UK, Matchspace provides tools for running leagues, ladders, tournaments, events and player engagement activities. We are continually improving the platform and are looking for an experienced developer to join us on an ongoing basis. The Opportunity We are looking for a practical and experienced software developer who can work within an existing product and help drive the next stage of development. Our platform is already established and built using .NET and React Native. This role is focused on understanding, maintaining and enhancing the current system rather than building a new product from scratch. You will work closely with the founders to develop new features, improve existing functionality, resolve technical issues and help introduce AI-assisted development processes that allow us to move faster and build better software. This is a long-term opportunity for someone who enjoys product development, problem-solving and working as part of a small, ambitious team. Key Responsibilities • Understand and work within the existing Matchspace codebase • Develop new features across web, mobile and backend systems • Maintain and improve existing functionality • Investigate and resolve bugs and support issues • Work with .NET backend services and APIs • Work with the React Native mobile application • Collaborate with founders to scope, estimate and prioritise development work • Review and improve system architecture where appropriate • Participate in testing, deployment and release processes • Provide ongoing monthly support and maintenance • Help implement modern AI-assisted development workflows • Identify opportunities to use AI to improve both development efficiency and product capabilities • Review, validate and extend AI-generated code to production standards Required Skills and Experience • Strong commercial experience with .NET development • Strong commercial experience with React Native • Experience working within established software products • Experience understanding and extending existing codebases • Strong knowledge of API development and integrations • Experience using Git and collaborative development practices • Excellent debugging and problem-solving skills • Experience supporting live production applications • Ability to work independently and manage workload effectively Desirable Skills • Experience with Microsoft Azure • Experience deploying and maintaining mobile applications • Experience with SaaS platforms • Experience integrating third-party services and APIs • Experience using AI coding tools such as ChatGPT, Claude, GitHub Copilot, Cursor or similar • Experience building AI-powered features into software products • Experience working with small businesses or startup environments What We Are Looking For We are looking for someone who can quickly become productive within an existing product. The ideal candidate will be comfortable reading and understanding existing code, making sensible improvements, and delivering features without creating unnecessary complexity. They should be excited by the opportunities AI presents for software development and willing to help us establish efficient AI-assisted development processes going forward. Most importantly, we want someone who is reliable, communicative and interested in building a long-term working relationship. Engagement We are seeking an ongoing relationship rather than a one-off project. The role is expected to include: • Ongoing monthly support and maintenance • Feature development • Technical improvements • AI integration projects • Product roadmap delivery Hours can be flexible and agreed based on experience and availability. To Apply Please send: • A summary of your relevant experience • Examples of .NET projects you have worked on • Examples of React Native projects you have worked on • Details of any AI-assisted development experience • Your availability • Your preferred hourly or monthly rate We are particularly interested in hearing from developers who have experience working with AI-generated code and who understand how to combine AI tools with sound software engineering practices to accelerate product development while maintaining quality.

Software Developer (AI-Assisted Product Development)

Remote | Contract / Freelance | Ongoing Engagement About Matchspace Matchspace is a growing SaaS platform helping tennis, padel, squash and pickleball clubs increase participation and simplify club management. Used by clubs across the UK, Matchspace provides tools for running leagues, ladders, tournaments, events and player engagement activities. We are continually improving the platform and are looking for an experienced developer to join us on an ongoing basis. The Opportunity We are looking for a practical and experienced software developer who can work within an existing product and help drive the next stage of development. Our platform is already established and built using .NET and React Native. This role is focused on understanding, maintaining and enhancing the current system rather than building a new product from scratch. You will work closely with the founders to develop new features, improve existing functionality, resolve technical issues and help introduce AI-assisted development processes that allow us to move faster and build better software. This is a long-term opportunity for someone who enjoys product development, problem-solving and working as part of a small, ambitious team. Key Responsibilities • Understand and work within the existing Matchspace codebase • Develop new features across web, mobile and backend systems • Maintain and improve existing functionality • Investigate and resolve bugs and support issues • Work with .NET backend services and APIs • Work with the React Native mobile application • Collaborate with founders to scope, estimate and prioritise development work • Review and improve system architecture where appropriate • Participate in testing, deployment and release processes • Provide ongoing monthly support and maintenance • Help implement modern AI-assisted development workflows • Identify opportunities to use AI to improve both development efficiency and product capabilities • Review, validate and extend AI-generated code to production standards Required Skills and Experience • Strong commercial experience with .NET development • Strong commercial experience with React Native • Experience working within established software products • Experience understanding and extending existing codebases • Strong knowledge of API development and integrations • Experience using Git and collaborative development practices • Excellent debugging and problem-solving skills • Experience supporting live production applications • Ability to work independently and manage workload effectively Desirable Skills • Experience with Microsoft Azure • Experience deploying and maintaining mobile applications • Experience with SaaS platforms • Experience integrating third-party services and APIs • Experience using AI coding tools such as ChatGPT, Claude, GitHub Copilot, Cursor or similar • Experience building AI-powered features into software products • Experience working with small businesses or startup environments What We Are Looking For We are looking for someone who can quickly become productive within an existing product. The ideal candidate will be comfortable reading and understanding existing code, making sensible improvements, and delivering features without creating unnecessary complexity. They should be excited by the opportunities AI presents for software development and willing to help us establish efficient AI-assisted development processes going forward. Most importantly, we want someone who is reliable, communicative and interested in building a long-term working relationship. Engagement We are seeking an ongoing relationship rather than a one-off project. The role is expected to include: • Ongoing monthly support and maintenance • Feature development • Technical improvements • AI integration projects • Product roadmap delivery Hours can be flexible and agreed based on experience and availability. To Apply Please send: • A summary of your relevant experience • Examples of .NET projects you have worked on • Examples of React Native projects you have worked on • Details of any AI-assisted development experience • Your availability • Your preferred hourly or monthly rate We are particularly interested in hearing from developers who have experience working with AI-generated code and who understand how to combine AI tools with sound software engineering practices to accelerate product development while maintaining quality.

I need help with a booking platform on an app

Seeking an experienced developer to build an automated booking bot for an existing mobile app. The bot will schedule a daily appointment at a specified time, include a manual override, and ensure reliable time-triggering. Responsibilities: integrate with the app’s booking workflow, handle authentication securely, manage retries and error states, and store credentials safely. Deliver a robust, maintainable solution with clear documentation, testable deployment instructions, and automated tests.

Test our Android app and provide feedback (US store only!)

We are looking for freelancers to test a specific flow in our Android app. The task is simple and should take no more than 15 minutes to complete. You don't need any developer skills. Requirements: - Must have an Android smatrphone with access to the US Play Market - Must be able to record your screen and send us the video. Task Description: We will provide you with a detailed guide with instructions on how to complete the task. The main steps are: - Install the app - Complete the onboarding process - Use one of the features - Provide feedback and a review of the app in Play Market - Send us a screen recording of your journey Payment: We will pay a fixed price for this task. The invoice will be submitted once your review is published on the Play Market. Important Note: We will only pay for submitted reviews from the US Store. Reviews from other stores will not be accepted.

Accessories and 3D PRINTING

Seeking an experienced accessories and 3D printing specialist to manufacture and assemble a smart mobile phone/tablet carrier. Project details will be disclosed progressively upon NDA execution. Strong English communication is essential; identity verification such as passport or driving licence may be required. Comprehensive operating procedures, manufacturing documentation, and transcripts will be supplied. Testing of the finished product is required. PCB production is currently available for eventual integration. Reliable, detail-oriented professionals encouraged to bid just the carrier needed ATM and material required will be advised on winning bid.

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App ready for finalisation

I am seeking an experienced React Native + Expo mobile app developer to assist with the final deployment and publishing stages of an already-developed mobile application. The application has already been built using AI-assisted development and the majority of the codebase is complete. I am specifically looking for someone experienced in mobile deployment, debugging, build configuration, and App Store submission workflows. Required Skills: * React Native * Expo / EAS Build * iOS deployment * Apple Developer / App Store Connect * TestFlight * Firebase or Supabase familiarity * Build debugging * Dependency management * Environment variable configuration * App signing / provisioning profiles Tasks May Include: * Reviewing existing codebase * Resolving build/dependency issues * Configuring EAS Build correctly * Preparing iOS production builds * Assisting with Apple Developer setup * TestFlight deployment * App Store submission support * Troubleshooting App Store review issues if required Important: * This is NOT a “build an app from scratch” project. * The app already exists and is functional. * Looking for someone efficient, technically strong, and experienced with modern React Native/Expo workflows. Please provide: * Examples of React Native / Expo apps you have deployed * Experience with App Store publishing * Your availability * Estimated hourly/project rate Long-term collaboration possible for future updates and maintenance.

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Full app development of Muslim marriage match app + Website

Hello, Would like an full app development for a Muslim marriage match making app - Similar to Muzz dating app, https://muzz.com/gb/en/ Additional I would like website representing similar - https://www.singlemuslim.com/ Please come back with a full proposal and quote. Kind regards. Asy

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Fix the App Problem

Run into mobile app issues. Look for people with Flutter/Dart, iOS, Swift/SwiftUI skills and experience.

Divi Phone clean up

I need someone to take a new 16 page Divi site and clean up the phone version. We will be adding eCommerce (probably Woo - and limited number of products) in a month or so, therefore if the applicant is versed in both it would be an advantage. Client prefers working with someone in the US. The budget isn't gigantic but reasonable and can led to future work as things expand. We prefer working with someone in the US for ease of work and communication.

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App development

Seeking an experienced developer to design and build a polished health and fitness app. Core features: purchase sessions and manage credits; calendar view to browse and book classes with availability limits; subscription-based credit tracking; baseline health assessments with progress tracking and visual charts; tiered subscriptions unlocking on-demand video content and live event streaming. Quality UI/UX, secure payment integration, scalable backend and analytics required.