- Hourly: $50.00 - $85.00
- Intermediate
- Est. time: More than 6 months, Less than 30 hrs/week
MUST BE LOCATED IN LAS VEGAS AREA OR TWIN CITIES. Repsetta is a fitness-focused startup seeking an experienced long-term Hybrid Mobile App Developer to join our team. We are looking for someone with a strong background in mobile app development, particularly in hybrid technologies. The ideal candidate will have experience with frameworks like React Native and Flutter, and be able to develop high-quality, user-friendly applications. This is a long-term position, offering a great opportunity to contribute to innovative projects in the fitness industry.
- Hourly
- Expert
- Est. time: 1 to 3 months, Less than 30 hrs/week
I currently have a digital sticker app called, Pixel Parade App which is "supposed" to be available on iTunes and google play - it features in app purchases of various digital sticker collections. The current developers cannot service my app due to internal reasons I was told bandwidth issues. I have had nothing but problems with this development team for many years trying to get this app to the market place. I need someone that can maintain this app so it is available and working as well as update the app as needed with additional features in the future. I am a designer and not a coder - I believe the app was created with Flutter. I could be wrong.
- Fixed price
- Intermediate
- Est. budget: $2,500.00
Hello Upwork Developers! This app will be a critical tool once it's finalized. Looking for an experienced, supportive, and communicative developer in the Sacramento or San Francisco Bay area. Fee for the first build of the mobile app and a desktop version is flexible based on experience and qualifications. Starting rate around $2-3K with a timeline of not more than 6 months. Project Criteria: -Set up a Supabase project cleanly -Create tables with proper relationships -Implement Row Level Security (RLS) -Write policies that protect sensitive data -Document every policy -Use Supabase Auth for login + roles -Avoid unnecessary Postgres functions unless documented -Full FlutterFlow project -Full Supabase schema -Full Supabase policies -Full documentation -Full training -Full source files -Full ownership transferred to me (owner) ACTUAL DELIVERABLES FOR APP (APP FEATURES) 1. User Accounts & Authentication -Email/password login -Password reset -Optional multi‑factor authentication -Role‑based access (if needed later) -Supabase Auth integration 2. Data Storage & Structure -Supabase database -Clean relational tables -Secure Row Level Security (RLS) -Encrypted or protected sensitive fields -Full audit trail (optional but recommended) 3. Data Input & Forms -Multiple structured forms -Conditional fields (show/hide based on user input) -Attachments (images, files, audio, etc.) -Draft saving -Edit/update existing entries -Delete entries (with confirmation) 4. Data Viewing & Reporting -List views -Detail views -Filters (date, category, tags, etc.) -Search -Sorting -Summary reports -Optional charts or analytics 5. PDF / Word / CSV Exporting Your app must support exporting: -Individual records → PDF -Collections of records → PDF or CSV -Summary reports → PDF -Optional: Word (.docx) export -Exports must include: - Branding -Timestamp -User info -Structured layout -Optional attachments FlutterFlow supports PDF generation natively. CSV export is easy. Word export requires a plugin or API. 6. File Attachments Users must be able to: Upload images Upload documents Upload audio notes View attachments Download attachments Stored in: Supabase Storage With secure access policies 7. Notifications (Optional) Email notifications Push notifications (if determined needed; nice to have) In‑app alerts Push notifications require: Firebase setup Apple/Google certificates 8. Subscription / Billing System If I want paid tiers later, I need: Stripe integration Subscription tiers Free vs paid feature gating Billing history Cancel/renew options Webhooks to update Supabase roles This can be added later — don’t need it for MVP. 9. Settings & User Preferences Profile editing Email change Password change Notification preferences Optional dark mode 10. App Publishing Requirements The app must support: iOS build Android build Web app (optional) App store listing setup Version updates Crash reporting (Firebase) 11. Admin Tools (Optional) If you want admin features later: Admin dashboard User management Data oversight Export all data Role assignment This can be added after MVP. ⭐ 12. Privacy & Security Requirements Because OGRE handles sensitive content: NDA required before development Secure Supabase RLS No external data sharing No analytics that expose user content Optional local encryption Optional “panic delete” or “quick hide” feature Decoy page for startup/app disguise ⭐ 13. Maintainability Requirements The app must be built so I can: -Add fields -Edit forms -Add pages -Update logic -Manage Supabase -Publish updates -Debug issues This is why FlutterFlow and post-app training is essential, so I can reliably handle the maintenance aspect of taking over control. Thank you for your interest in my app and I look forward to hearing from you!
- Hourly
- Intermediate
- Est. time: Less than 1 month, Less than 30 hrs/week
This is a Flutterflow app called CARS which stands for Cybersecurity Awareness & Resilience Solution. I am a Phd student at NSU and I will be engaging in developmental research for microbusiness owners testing cyber awareness and resilience for their microbusinesses. This is intentionally a minimal research app. There is no backend all logic is handled in FlutterFlow + Firestore. The app enforces sequential viewing of videos and tracks completion and rewatch behavior only. The focus is on simplicity, reliability, and clean UX. Avoid over-engineering. There are 102 videos that have already been loaded via csv via Rowy into Firebase/Firestore. You already have: videoId title module order videoUrl and the videos are set-up to play sequentially one after another. If you get the job, I will provide the csv with placeholders for videourl for privacy. Please review the attached Developer Brief to get an idea of the specifics of this job. Thank you.
- Hourly: $20.00 - $25.00
- Expert
- Est. time: 1 to 3 months, Less than 30 hrs/week
We are seeking an experienced mobile app developer to create a fully functional MVP that combines social features with an AI chat component. The app should be clean, stable, scalable, and ready for early user adoption, not just a clickable demo. Specific details about the app’s concept and logic will be shared under NDA. This project has a clear roadmap and strong vision for launch, and we’re looking for a thoughtful, skilled developer who can help architect and build a production-ready product with strong user experience, reliability, and performance. Complete UI/UX designs and flows have already been created in Figma, so this role is focused primarily on development, backend architecture, integrations, and implementation rather than design. Preference will be given to developers located in the DC, Maryland, or Virginia (DMV) area for easier collaboration and communication throughout the project, and occasional in-person meetings if needed. Deliverables & Requirements • Develop a cross-platform mobile app using Flutter or React Native • Build secure user authentication, profiles, friend systems, and group chat functionality • Integrate AI chat features via API with moderation and safeguard controls to prevent misuse • Implement reliable push notifications and time-sensitive user interactions across iOS • Set up scalable backend architecture and database infrastructure • Translate existing Figma designs into a polished, responsive mobile application • Conduct testing, debugging, and QA to ensure app stability and performance • Experience with Firebase, Supabase, WebSockets, or similar real-time technologies preferred • Deliver a functional app ready for deployment to the App Store
- Hourly: $35.00 - $55.00
- Expert
- Est. time: More than 6 months, Hours to be determined
Seeking a highly-experienced software developer based in the US. The ideal candidate will have multiple skills with very strong experience 8+ years with PDP, Javascript, MySql, managing hosting servers, knowledge of Flutter and API development, experience using AI to assist in software development, must be an independent individual, not a firm. U.S. Based only. Individuals posing as being U.S. based please "do not" respond we will discover this. Responsibilities include developing, maintaining and advancing software applications, collaborating with cross-functional teams, and ensuring high-quality deliverables. Must be highly accessible by Telegram, email or phone/Zoom. Able to work independently and manage projects effectively. Strong ethics, integrity and character with an entrepreneurial attitude.
- Fixed price
- Expert
- Est. budget: $1,500.00
*NO AGENCIES, Single Engineers Only* SeatWaves is a live ticket resale platform with a fully operational web version, complete Broker API, and TicketMaster API integration already in production. We are looking for a skilled mobile developer to finish the final leg of our iOS and Android app — not start from scratch. The previous development team completed approximately 88% of the mobile frontend UI. The Figma designs are finalized. The backend APIs are live. What we need now is someone to come in, understand the existing codebase quickly, wire everything together, and deliver a production-ready app. What's Already Done → Live web platform (full-featured, production-ready) → Broker API — fully built and operational → TicketMaster API — fully integrated → Figma UI/UX designs for iOS and Android — finalized and approved → iOS & Android frontend — ~88% complete (UI built, needs backend wiring) What Needs to Be Completed → Wire existing mobile frontend to live backend APIs (authentication, listings, checkout flows, broker inventory) → Integrate TicketNetwork API — inventory feed and seat availability → Implement interactive seat map API integration → Bot protection and rate limiting hardened for high-traffic onsale events → Queue integrity and load-resilience architecture for peak traffic → End-to-end QA testing on iOS and Android → Store-ready builds (App Store + Google Play submission prep) Why $1,500? We want to be transparent about the budget and why we feel it's fair for the right developer. The heavy lifting has already been done. The UI is built. The APIs exist. The designs are approved. This engagement is scoped specifically around integration, security hardening, and QA — not ground-up development. We estimate 3–5 weeks of focused work for an experienced React Native or Flutter developer who can hit the ground running. We are not paying for a full build — we are paying for a sharp finisher who can take 88% to 100% efficiently and cleanly. We're offering $1,500 fixed price for a clearly scoped, well-documented completion sprint. Applicants who try to reprice this into a full rebuild will not be considered. Who We're Looking For → Strong experience with React Native or Flutter (please specify) → Proven ability to inherit and work within existing codebases → Experience integrating third-party APIs (ticketing, payments, or marketplace preferred) → Familiarity with security best practices for high-traffic consumer apps → Clear communicator — we need daily async updates and weekly check-ins → Portfolio or GitHub showing mobile apps you've shipped, not just started To be considered, please include the following in your proposal: 1. A brief overview of a similar project you've completed (inherited codebase or API integration work preferred) 2. Your estimated timeline to complete the remaining scope 3. Your preferred framework (React Native or Flutter) and why 4. Any questions you have about the existing stack Generic proposals will be declined. We're looking for someone who has read this carefully and can speak specifically to the work at hand. READY TO FINISH SOMETHING REAL? The foundation is built. The designs are done. The APIs are live. We need a finisher — someone who delivers, not someone who starts over.
- Hourly
- Intermediate
- Est. time: Less than 1 month, Less than 30 hrs/week
14 pages within Flutterflow Firebase already set-up Firestore houses 102 short videos for Phd Research This is a Cybersecurity Awareness app I just need assistance in making the pages work correctly with each button and be able to access the videos See the rules and ideas on architecture in the two attachments
- Fixed price
- Expert
- Est. budget: $500.00
Subject: Invite: Rapid Fixed-Price $500 App Stabilization & Integration Sprint Hello, I am looking to immediately onboard a top-tier domestic engineer to clear our workstation runway for a rapid, fixed-price $500 Framework Stabilization Sprint to drive our core multimedia application straight to a live grand launch. Our application architecture is pre-coded and fully intact on our master branch. Your terminal will focus strictly on targeted backend surgery and API integration to clear legacy regressions: The Sprint Scope Matrix: 1. Media State Management: Patch our 6-zone media player buffers where tracks cut out after 2 seconds. Cleanly un-brick the hardware microphone recording paths inside the vocal booth loop to stabilize audio-video lip-sync processing. 2. Gateway Sync: Synchronize our RevenueCat transaction product ID configuration strings so they match our live app store profiles. 3. Soundraw API Integration: Activate and validate our pre-built Soundraw API backend channels to stream multi-genre backing tracks over the air networks. This is a high-velocity, pay-for-performance sprint requiring a working build delivered to device glass on an accelerated holiday timeline. Let me know your immediate terminal availability so we can transfer our repository access tokens today.
- Hourly: $20.00 - $30.00
- Entry Level
- Est. time: 3 to 6 months, Less than 30 hrs/week
COREX MVP Native-feeling iOS and Android app (using a cross-platform framework like Flutter or React Native) User login and profiles COREX onboarding assessment (goals, experience, injuries) AI-generated 15-minute rotational workouts Exercise library with videos and instructions Workout timer and progress tracking Basic AI chat coach for workout and recovery questions Subscription/payment integration Admin portal to add or update workouts and content Save for Version 2 These are valuable, but they can wait: Camera-based form analysis Wearable integrations Advanced nutrition planning Community features Leaderboards and challenges Franchise/business dashboards Live trainer messaging Upwork budget suggestion UX/UI design App development AI integration Testing App Store and Google Play launch That gives you control over quality and payments. One thing I’d add Rather than describing it as just another fitness app, position COREX as a specialized AI rotational training platform. That’s what makes it stand out. For example: “COREX is an AI-powered rotational fitness platform that delivers personalized 15-minute workouts designed to improve core strength, mobility, stability, athletic performance, and functional movement through our proprietary rotational training methodology.” That description is much more distinctive than “fitness app.” My recommendation If I were helping you build this, I’d focus on creating something impressive enough to demonstrate to investors, gym owners, and potential partners—not every feature you eventually want. A polished MVP that users enjoy is often more valuable than a feature-heavy app that’s unfinished. I also think your app could have a clear advantage if it emphasizes the science of rotational training rather than trying to compete with broad fitness apps. That gives COREX a unique identity from day one. The product and program itself is trademarked and patent pending