Find Android projects and freelance work

I need a freelancer from Trinidad and Tobago who can buy prepaid SIM from local operators and help us with the testing of SMS delivery for popular apps.
The only requirement is Android phone.

For this particular test we will need prepaid sim from Digicel operator.

I have an authentication flow used in an Android APK. When running the flow via the official app, no CAPTCHA is triggered. However, when replicating the same requests with Python (e.g., using requests, httpx, tls_client or curl_cffi), a reCAPTCHA v2 challenge appears.

I am looking for an experienced developer who can:

1. Implement an unlimited reCAPTCHA v2 Enterprise solving method without using paid captcha solving services.
For example, by reverse-engineering or emulating the expected interactions (e.g., using the same fingerprinting/behavior as the app).
Or via open-source captcha solvers or innovative approaches that do not rely on external paid APIs.

OR

2. Reconstruct or spoof the TLS/JA3 fingerprint (or any other relevant fingerprinting/signatures) of the official Android APK.
This may involve:
- Capturing the actual TLS ClientHello parameters (ciphers, extensions, etc.) via mitmproxy, Wireshark, or Frida.
- Reproducing them in Python or another scripting language so the server perceives the same client.
- Emulating HTTP/2 and any custom headers if needed.

Requirements:

Proven experience with:
- TLS fingerprinting (JA3, JA3S, etc.) and fingerprint spoofing.
- Android traffic analysis and reverse engineering.
- Recaptcha v2 solving techniques (without paid services).
- Python or any other relevant HTTP clients supporting low-level TLS customization.
- Ability to demonstrate a working proof of concept.
- Clear documentation of your approach.

Deliverables:

A script or tool that:
- Authenticates successfully without triggering CAPTCHA or solving it without paid APIs.
- Mimics the APK’s TLS and behavioral fingerprint.
- Instructions for setup and usage.

Notes:

I will provide:
- The APK name.
- Sample requests and responses.
- Observed differences between the APK and Python requests.

Budget:
Please propose your estimated budget and timeline.

How to apply:
- Briefly explain your experience with similar tasks.
- Mention any past work related to TLS fingerprinting or CAPTCHA bypass.

I am seeking an experienced React Native developer to assist with upgrading my existing React Native project and preparing it for deployment to app stores. The project is slightly older, and I have made some modifications that need to be integrated before submitting the builds. Your expertise in ensuring compatibility with the latest versions and optimizing the app for store submission is crucial. If you have a strong background in mobile app development and deployment processes, please apply.

📱 Project Overview:
We are building a mobile-first event booking platform designed for users to discover, customize, and book event services such as venues, catering, décor, and more—all in one place. The platform includes a vendor dashboard for service providers and an admin dashboard to manage the marketplace, monitor transactions, and handle support operations.

🔑 Core Features:
📲 Mobile App (Flutter – iOS & Android)
OTP-based registration + social logins (Google/Apple)

Dynamic service categories and multi-vendor service booking

Real-time availability & instant/scheduled bookings

Coupon & rewards system with point-based redemption

Partial payment milestones (deposit + scheduled balance)

Event planner with calendar & conflict alerts

Push notifications for booking updates and offers

Favorites, AI-based recommendations, and loyalty tracking

My Bookings tab with refunds, rescheduling, and review system

Bilingual support (English & Arabic)

🧑‍💼 Vendor Dashboard (Web)
Vendor registration with document verification

Manage services, pricing, availability, and auto-slot generation

Booking calendar with manual entries and time-off settings

Coupon creation, performance analytics, and review tracking

Financial reports, commission breakdowns, and payout history

Ad management: boost listings, feature services, and track clicks

Subscription plans with upgrade/downgrade flow

🛠 Admin Dashboard (Web)
Admin login with roles (support, finance, super admin)

Manage users, vendors, bookings, disputes, and content

Control service categories, coupons, and partial-payment rules

Refund approval flow and payout monitoring

Banner management and global push notifications

Full analytics for bookings, revenue, and platform usage

Multilingual content and CMS sections (Terms, About, etc.)

🧰 Tech Stack (Preferred):
Frontend (Mobile): Flutter

Frontend (Admin & Vendor): React.js

Backend: Node.js + Express

Database: MongoDB or Firebase

Notifications: Firebase Cloud Messaging

Payments: MyFatoorah / KNET

OTP & SMS: Smsbox or similar

Hosting: AWS

📈 Non-Functional Requirements:
Scalable backend for thousands of concurrent users

Secure payment & user data (SSL, PCI-DSS, etc.)

Real-time communication & updates

RTL (Right-to-Left) layout support for Arabic

99.5% uptime target

Modular code with clean API documentation

✅ Ideal Candidate:
Proven experience with event, e-commerce, or service booking platforms

Strong background in Flutter, Node.js, MongoDB, and cloud deployment

Familiar with secure payment integration and real-time app architecture

Comfortable working across mobile and web ecosystems

Delivers clean, documented code and meets deadlines consistently

💬 To Apply:
Please include:

Your proposed tech stack and approach

Links or screenshots of similar apps or dashboards you’ve built

Estimated timeline and budget

Any questions or suggestions to improve the project

Check SRS PDF

We are seeking a skilled mobile app developer to create a high-quality application for our business. The ideal candidate should have experience in both iOS and Android platforms, be proficient in coding, and have a strong understanding of user interface design principles. Your role will involve collaborating with our team to deliver a user-friendly app that meets our specifications and enhances user engagement. If you have a passion for creating innovative mobile experiences, we would love to hear from you!

We are looking for talented developers to join our team in creating FamVault, an innovative family data management app. This project is designed to help families organize and manage their important information seamlessly. Ideal candidates should be ready to start immediately and possess strong programming skills. If you are passionate about building user-friendly applications and have experience in mobile app development, we want to hear from you!

Looking someone who can reskin and upload cordova project from codecanyon. urgent

I’m seeking a skilled Android developer (Java) to create a lightweight and reliable app with the following functionality:

App Overview:

The app will monitor a specific text element (a date) on a webpage (from a known website) and check for any changes every 10 minutes. When a change is detected, the app will:
• Emit a sound/ring to alert the user
• Open automatically and display an activity screen with a button on it “ text modified “
- If the user press the button sounds stops
• Show a notification badge (e.g., “1”) on the app icon
• If the user does not interact, the sound stops automatically after 1 minute and then app will restart emitting sounds after 9 more minutes

Core Features:
• Monitor and parse a specific section of text (a date) on a webpage
• Check for changes at 10-minute intervals
• On text change:
• Update the app icon with a badge or indicator
• Trigger a sound or ringtone
• Launch the app and display a button labeled “Text Modified”
• Stop the alert sound when the user presses the button
• Auto-stop the alert sound after 1 minute if no interaction
• Run efficiently in the background without significant battery drain
• Clean and minimalistic UI focused on functionality

✅ Requirements:
• Proven experience with native Android development in Java
• Ability to parse and extract HTML content from webpages (e.g., using Jsoup)
• Capable of handling background tasks and notifications
• Ensure compatibility with modern Android versions (Android 10+)

Deliverables:
• Full source code
• Basic documentation or instructions for modifying the URL or the targeted text element

Job Title: Python Crawler Developer (Web & App Crawling – Scrapy/Selenium/APIs/Proxy)

Job Overview:

We are looking for a highly skilled Python Developer with strong experience in building both web and mobile app crawlers. The ideal candidate should have in-depth knowledge of Scrapy, Selenium, REST APIs, proxy rotation, and techniques to bypass anti-scraping mechanisms. You'll be responsible for building scalable, stealthy crawlers that extract data from websites and mobile apps (via APIs or reverse engineering traffic).

Responsibilities:

Develop and maintain web crawlers using Scrapy, Selenium, and custom spiders.

Build and manage mobile app crawlers by intercepting and decoding API requests, using tools like mitmproxy, Charles Proxy, or Burp Suite.

Handle proxy rotation, user-agent spoofing, cookie/session management, and headless browsers.

Monitor and adapt to changing structures of target websites and apps to maintain scraping accuracy.

Optimize performance, manage rate limits, and avoid detection (CAPTCHA, IP blocks).

Structure and store extracted data in JSON, CSV, or databases.

Maintain logs, error tracking, and reprocessing pipelines for failed jobs.

Required Skills:

Strong expertise in Python with deep knowledge of Scrapy, Selenium, and requests/BeautifulSoup.

Experience with mobile app traffic analysis using proxies/sniffers.

Understanding of RESTful APIs, HTTP methods, and JSON/XML formats.

Familiarity with proxy services, rotating residential/datacenter IPs, and anti-bot evasion.

Solid grasp of HTML, DOM parsing, and browser automation.

Hands-on with Git, Linux command line, and virtual environments.

Preferred Skills:

Experience with tools like mitmproxy, Charles Proxy, Burp Suite.

Familiarity with headless browsers like Puppeteer, Playwright (optional).

Ability to reverse engineer API calls from Android/iOS apps.

Knowledge of Docker, cloud deployment (AWS/GCP), and job schedulers.

Basic understanding of captcha-solving services (2Captcha, CapMonster, etc.).

Bonus Points:

Built crawlers for domains like e-commerce, travel, social media, or financial data.

Experience with CI/CD pipelines for automated crawling workflows.

Knowledge of data cleaning, ETL, or streaming pipelines (Kafka, Airflow, etc.).

We are seeking a skilled developer to create a mobile app for our small U.S.-based construction company. The app will showcase our product catalog, focusing on fireplaces and kitchens. You should have experience with React Native and Node.js to ensure a smooth and responsive user experience. If you are passionate about building user-friendly applications and have a creative approach to design, we want to hear from you!

• Include a link to your GitHub profile and/or website

We are seeking a skilled developer to create an android application similar to iproxy.online. The primary feature will be a single button that enables users to host mobile proxies using their phone's SIM card.

Alternatively, if the above is too complex, you can literally use Iproxy and just build an app that's just a cosmetic overlay on top of Iproxy. By overlay I mean clicking a button on our app would just trigger the Iproxy process behind the scene.

Please send a quote for the timeline and price, along with your resume/portfolio.

Description:
1) We’re looking for users with specific Android devices to help us test a mobile app feature related to heart rate measurement.
2) This is a simple task that requires you to use your phone's camera.
3) The test is part of our ongoing development, and your participation will help us improve the technology.
4) We’ll provide clear instructions after the contract is started.

There is no right or wrong — your genuine and honest interaction with the app is what we’re looking for.

Requirements:
You must have access to one of the following devices:
1) moto g20
2) RMX3269
3) moto g9 power
4) moto e6i
5) Hisense U964
6) moto g60s

Please include the word "gowithroman" in your proposal to confirm you’ve read the full description.

Notes:
This is an hourly contract at a rate of $5 per hour
We may invite selected participants for similar short tests in the future.

Feel free apply.

• What device do you have on hand?
• Please send a screenshot of the "About phone" section in your settings.

Project Overview:

WebAR platform for property walkthroughs (think Matterport but mobile-first)
No-app-required experience via QR codes/links
Target: Dubai's premium real estate market
Tech stack: 8th Wall + Three.js/A-Frame + React

What I Need:

Interactive 3D property tours that work on mobile browsers
Admin dashboard for project management
Optimized for Middle East mobile networks
Client-branded experiences with hotspots/navigation

Budget & Timeline:

Initial test project: $500-800 (1-2 weeks)
Full MVP: $2,000-3,000 (6-8 weeks)
Ongoing partnership potential as we scale

Why This Could Be Great for You:

Growing market in MENA region
Potential for long-term collaboration
Real estate sector has strong budgets
Portfolio piece for premium WebAR work

I'd love to see any WebAR projects you've built, especially if they're mobile-optimized or involve 3D environments. Can you share a few live links?
Also, what's your experience with:

8th Wall platform
Mobile performance optimization
Real-time 3D rendering
Working with Middle East clients/timezones

Happy to jump on a quick call to discuss technical approach and see if we're a good fit.

I have a piece of equipment with an NFC tag. It says it is expiring soon. I have a new piece of equipment which has not been used yet, with an NFC tag.
Help me check if I can copy the unused NFC code on the unused equipment, onto the used equipment so it lasts longer.
Check if the tag is even writeable/editable.
I have NFC Tools app.

I’m looking for a white-hat ethical hacker or mobile security expert with strong experience in Firebase (especially App Check, Device Check, and Authentication).

Our app currently requires selfie verification when switching to a new device. We want to understand how the current device recognition is implemented, and whether it can be improved, bypassed legitimately, or restructured to reduce friction without weakening security.

This is a security audit and consulting task, not app development.

You should be able to:
Reverse-engineer or analyze how the app binds to a device (if using Firebase App Check, Secure Device ID, etc.)

Determine what triggers the selfie verification and how it can be optimized or avoided in a secure way

Suggest improvements or alternative methods for device migration without degrading security

Provide a technical summary or proof-of-concept if needed

Ideal Background:
Mobile security (Android/iOS)

Firebase internal architecture knowledge (App Check, Custom Claims, Auth)

Experience with ethical hacking or mobile penetration testing

Understanding of biometric verification workflows

This task is intended for research, internal testing, and optimization — not for malicious use.

Use https://github.com/hyochan/react-native-iap
React Native Subscription Integration (Apple/Google) with Custom Backend
We're building a mobile app that handles in-app subscriptions (Apple & Google) using react-native-iap (no RevenueCat, no Expo).

🔧 Requirements
Use react-native-iap

No Expo, No RevenueCat

Backend is a custom Ruby on Rails server

The app should:

Use a hardcoded account_id to identify the user.

Call the server to check subscription status by account_id.

If no active subscription, show a Subscribe button.

On click, show a screen with available subscription products.

Handle the purchase flow with react-native-iap.

After purchase, send the transaction to our server.

The server will validate the receipt with Apple/Google.

The server will respond with success/failure.

If successful, app should re-check subscription status from the server.

✅ Your Role
Implement react-native-iap integration (both Android & iOS).

Set up the purchase flow and receipt submission to the server.

Handle success/failure responses from the server.

Communicate with a pseudo Ruby on Rails backend (we'll provide API endpoints and sample payloads).

This is not a full app — just the IAP flow and context handling.

We are seeking a talented mobile app developer to transform our innovative app concept into a fully functional product. The ideal candidate will have experience in app development across both iOS and Android platforms. You will collaborate closely with our team to refine the concept, design user-friendly interfaces, and ensure seamless functionality. If you have a passion for creating engaging mobile experiences and have a strong portfolio, we want to hear from you!

Please share your GitHub.

Price is firm.

Major plus for someone who has completed AI jobs on their profile dealing with chatbots.

I am looking for an excellent React Native developer to improve my chatbot by adding video and phone call support, and animating GIFs during calls. Make sure the messages will continue to work properly. I am using Gemini 2.5 native audio.

What You’ll Do:

Code any screens that are needed for dark and light mode

Connect the front end to the Gemini API, handling message flow and responses

Make sure messages, video, and phone call are implemented correctly

Handle real-time events like incoming calls, active call state, and ending calls

Integrate GIFs and animations (e.g. from Giphy or Lottie) that play during active calls

Manage chat and call state on the front end (e.g. loading states, errors, message queues)

Work with backend APIs to send/receive messages and call data

Storage of chat history, call logs, etc is something we can figure out what the best solution will be

Ensure a smooth, responsive user experience across both iOS and Android devices

We are seeking a skilled mobile app developer to fix and submit our app to both the Apple App Store and Google Play Store. The ideal candidate will have a strong understanding of app submission processes, including compliance with store guidelines and resolving any issues that may arise during submission. Your expertise will ensure that our app is successfully launched and reaches its intended audience. If you have experience in mobile app development and a proven track record with app store submissions, we want to hear from you!

We are looking for a person who will conduct various types of testing of mobile services to ensure a high level of quality of our products.

You will need:

-Android or iOS cell phone
-Internet connection
-A prepaid SIM card with the ability to call and send sms to a premium number
-A second phone to record the entire process

All calls and sms costs will be reimbursed to you.


Please, contact us for further details.

I am seeking a skilled developer to develop a web portal for my social skills training app. The first milestone is to create a web portal.

We are seeking a skilled freelancer to extract specific data from an Android application. The data required includes front
(1) File number
(2) Front page details in Polish,
(3) Front page category in Polsih,
(4) Back page deails in Spanish
(5) Back category in Spanish
(6) MP3 file in Spanish,

I will provide login details to access the app.

The project entails organizing this data into a structured table format excel or CSV file (including the line breaks and special characters for easy access and analysis. Experience with data extraction and familiarity with Android root access/ Android apps data scraping is essential. If you are detail-oriented and have a track record of similar projects, we would love to hear from you.

• Have you done this before?
• How confident you are going to complete the task?
• How Long will it take you to extract the data?

We are seeking a talented game developer to create engaging and immersive experiences across web, mobile, and VR platforms. The ideal candidate should have a strong understanding of game mechanics, user experience design, and proficiency in relevant programming languages. You will be responsible for delivering high-quality, task-based projects while collaborating with our creative team. If you have a portfolio showcasing your work in game development, we would love to hear from you!

The work is divided into 3 phases:

Phase 1 – Setup:

Login/signup, branding, hosting, GitHub, platform prep

Pay: $25 for Web + $10 for each extra platform


Phase 2 – Customization:

UI/UX updates, features, plugins, testing

Pay: $5–$300 depending on complexity

UI pages: $2–$5 each



Phase 3 – Launch:

Deployment, final bug fixes, advanced features

Pay: Negotiated based on task


We value clear communication, clean code, and fast delivery. You’ll be paid per task after approval, and can take on more projects based on performance.

To apply: Share your portfolio, preferred platforms, and game engine experience. Let’s build fun, high-quality games together

🎨 UI/UX Designer for Music Rhythm Game App – Musicality Beats (Downloadable on IOS and Android) 🎶

Please make sure to download and experience the App Musicality Beats prior to connecting with us.

Experience Level: Intermediate to Expert
Category: Design & Creative → UI/UX Design
📱 About the Project:
We are Musicality Beats, a music rhythm game app designed for dancers and music lovers to improve their musicality in a fun, interactive way. The app currently has a playful, clean, and modern design that resonates with rhythm-based gameplay and the dance community.
We are now expanding our features and introducing new modes, and we are looking for a UI/UX designer to help us design new screens and improve user journeys while keeping the look and feel consistent with our existing design style.
________________________________________
🔍 What We’re Looking For:
• A talented UI/UX designer with strong experience in mobile app design.
• Someone who can understand, match, and build upon an existing visual identity.
• Ability to create user-friendly, intuitive flows that enhance the game’s usability and player experience.
• Proactive in suggesting UX improvements, new screen structures, and navigation optimizations.
• Familiarity with music, rhythm games, or gamification is a plus.
• Strong communication skills and the ability to collaborate with our product and development teams.
________________________________________
🎯 Scope of Work:
• Design new app screens for upcoming features (including gameplay modes, educational content, user onboarding, streak systems, etc.).
• Ensure visual consistency with our existing design system, color palettes, and overall app vibe.
• Provide UX recommendations to improve usability and engagement.
• Work closely with our Product Manager and Developers to align on user flows and technical feasibility.
• Deliver high-quality design files (preferably in Figma or similar tools).
________________________________________
✅ Requirements:
• Proven experience in mobile UI/UX design.
• Strong portfolio demonstrating similar projects, preferably in gaming, music, or education apps.
• Ability to design within playful, colorful, and modern design languages.
• Experience with UX best practices and designing for retention and engagement.
• Availability for ongoing collaboration.
________________________________________
🚀 Bonus Points:
• Experience in rhythm games, music apps, or dance-related products.
• Understanding of gamification techniques.
________________________________________
💬 To Apply:
Please share:
1. Your portfolio with relevant mobile app designs.
2. Briefly tell us how you would approach maintaining visual consistency while designing new features.
3. Start your answer with I downloaded Musicality Beats and my first impression was: [Complete the sentence] then continue your answer as you see convenient.

Overview:
We’ve done the cleanup. Our events are structured and standardized. But we’re still flying blind when it comes to retention and user behavior. Our dashboards don’t tell the real story, and we’re not confident in the metrics that should be driving product decisions.

We’re looking for a Product Analytics Engineer who can go beyond dashboards—someone who understands how analytics should be designed from the ground up, from instrumentation in mobile code to defining meaningful funnel and retention metrics.

This role sits at the intersection of product, engineering, and data, and is critical to building an analytics foundation we can trust.

⸻

What You’ll Do:
• Audit and improve our current event instrumentation across iOS and Android apps (Firebase).
• Define and wire up missing product events (e.g., onboarding complete, backup skipped, swap failed), including any necessary in-code flags.
• Design retention and funnel metrics that reflect the real user journey — not just vanity charts.
• Own the definition of key analytics concepts like:
• What counts as onboarding complete?
• How do we measure D1/D7/D30 retention in a way that matches our product?
• Where exactly do users drop off in our funnels?
• Partner with engineers to QA event implementation and ensure platform consistency.
• Build or advise on dashboards that are accurate, reliable, and actually actionable.
• Serve as the go-to person for analytics integrity — you’re not just tagging things, you’re designing the truth.

⸻

You Might Be a Fit If You Have:
• 2–5+ years working in product analytics, growth engineering, or mobile instrumentation.
• Hands-on experience with Firebase Analytics (bonus: Amplitude, Mixpanel, or Segment).
• Strong understanding of mobile event architecture across iOS and Android (you know how devs actually implement tracking).
• Experience designing and debugging funnels, retention, and cohort metrics that align with real-world user behavior.
• A product mindset — you think about why something should be measured, not just how.
• Comfort collaborating across product, engineering, and design.

Closed Testing - Android App.
12 days, testing the app and report any bugs or lags in the app.

We are seeking an experienced banking app developer to create a user-friendly mobile application. The ideal candidate will have a strong understanding of financial services and mobile app development frameworks. You will be responsible for designing, developing, and implementing features that ensure a secure and efficient banking experience. If you have a passion for fintech and can deliver high-quality work within deadlines, we want to hear from you!

We are seeking a skilled developer to assist in building a fitness and mindfulness app that promotes healthy living and mental wellness. The ideal freelancer should have experience in mobile app development and a passion for fitness. Responsibilities include collaborating on app design, integrating features like workout tracking, meditation guides, and user engagement tools. If you are enthusiastic about health and technology, we would love to hear from you!

Description
We’re building Android payment acceptance application (neturim vardo, nebent SoftPOS ), an application, which empowers merchants to accept payments anywhere with just an Android-driven device. We need a Android UX/UI designer to build a token-based, white-label design system in Figma and redesign ~20 key screens, all aligned with Material 3 and WCAG 2.2 AA/AAA.

Product context
SoftPOS is a cutting-edge software solution that transforms any NFC-enabled Android smartphone or tablet into a fully functional, secure payment terminal. Designed for mobility and ease of use, it enables merchants to accept contactless payments anywhere, making it ideal for businesses on the move or in non-traditional retail environments. With built-in accessibility features and compliance with industry standards, SoftPOS ensures an inclusive and seamless payment experience for both merchants and customers.

Brand guidelines
I am uploading the brand book, but will be discussed later

Reference materials
We have some wireframe examples that I will attach here, but to be discussed.

Legal/NDA
We have an NDA agreement from our company. You are welcome to read it.

Communication
Preferred channels for communication: Teams (chat & meet), email.

Paid test task brief
Login screen - a screen/step in product usage flow, which allows user to log into an application with username & password. Consider error handling (wrong credentials) and visual states. Consider any other mandatory elements to support clear and logical user flow following various scenarios (forgetting the credentials; locking the user account; etc.)

Payment initiation screen - following the login user should be navigated to the main - payment initiation - screen, where amount for a payment could be entered. Consider defining clear design to guide the user to action for starting the payment. Consider placeholder for accessing the other app menus from the main screen.

Payment completion screen - after payment has been completed, user is presented with the outcome of a payment - success (Payment approved) / failure (Payment declined). Consider clear presentation of final state and other elements providing more information about the completed payment. Consider the UX consistency and allow user to proceed with returning to the main screen.

Success criteria:
Follows Material Design Guidelines
Follows WCAG 2.2 AA/AAA guidelines
Clean, consistent, and professional visual style
Responsive and adaptable to different screen sizes (design at least for one standard phone size)
Clear and logical user experience flow
High-fidelity mockups of the three screens, delivered in Figma.

• Describe your recent experience with similar projects

We are seeking a talented freelance Flutter developer to create a simple yet effective Android app for driver hire. The project includes the development of three main modules: Driver, Customer, and Admin. The goal is to establish a Minimum Viable Product (MVP) that is user-friendly and efficient. If you have experience in Flutter development and a passion for building mobile applications, we would love to hear from you!

We are seeking an experienced developer to help build the MVP of SociallyFound using Firebase Studio. The project includes setting up APIs, managing Firestore DB, and integrating basic AI features. Most of the UI is already complete, so we need someone who can hit the ground running and facilitate a quick launch. If you have a strong background in Firebase development and are passionate about delivering high-quality results on a tight timeline, we would love to hear from you!