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I'm seeking a seasoned developer proficient in Node.js, React.js, and MySQL, with experience in trading API integration. Ideal candidates should have: - Strong background in Node.js and React.js - Proficient in MySQL - Prior experience with trading API integration Please note, no specific trading API has been mentioned yet, and the primary goal of this project has not been defined. The project may involve building a new application, improving an existing one, or fixing a specific issue.

I'm seeking a skilled software developer to create a Windows-compatible application that adjusts and warps the output of two projectors for alignment with a 180-degree curved screen. Key Features: - Utilize NVIDIA’s Warp and Blend API for image warping and blending. - GUI with essential functionalities: * Real-time preview of adjustments * Manual input for precise control * Preset options for quick calibration Ideal Skills: - Proficiency in Windows software development - Experience with NVIDIA’s Warp and Blend API - Strong ability to create user-friendly GUIs Please ensure your proposal includes relevant examples from your portfolio.

I need assistance using the Apify API to extract specific fields from a JSON file using Python. The data needs to be well organized and presented in a format that I can easily understand and use. Your main responsibilities would be: - Utilize the Apify API to extract data from a JSON file. - Focus on specific fields that I will provide. - Present the extracted data in a clear, well-structured manner. Ideal skills for this project include: - Proficiency in using APIs, particularly Apify. - Strong data extraction and manipulation skills. - Ability to present data in a clear and user-friendly manner.

Looking for an experienced freelancer to help with the setup and troubleshooting of a fullstack chat application built with React.js (Vite) for the frontend, Node.js, , and for the backend, and MongoDB as the database, hosted on an Apache server with SSL enabled (Let’s Encrypt). The project is based on the burakorkmez/fullstack-chat-app repository. Tasks include fixing API route errors, ensuring backend-to-frontend communication, configuring CORS, resolving frontend build and deployment issues, setting up Apache virtual hosts for the frontend and backend, ensuring HTTPS works seamlessly, and testing registration/login functionality. Detailed documentation of the steps performed is required. The application is hosted on an Ubuntu server with a correctly pointed domain. If

I'm looking to build a stock scanner that operates based on 9 separate rules. The ideal candidate for this project should be proficient in Python and have experience working with the Bloomberg Terminal API. Key Requirements: - Development of a stock scanner based on 9 distinct rules. - Using Python as the primary coding language. - Integrating the Bloomberg Terminal API into the scanner. Output: - The stock scanner should display its output on-screen. Ideal Skills: - Proficiency in Python. - Experience with the Bloomberg Terminal API. - Understanding of stock market and trading principles. Please note that the specific types of stocks to be scanned and the visual representation of the output are not predetermined. Therefore, flexibility and creativity in these...

I'm seeking an expert familiar with Wati and the WhatsApp API to assist with the registration of our business on Wati for our online gaming platform. The primary function of the API is customer support, but I also want to leverage it for broadcasting updates to our users. Key Requirements: - Register our business on Wati - Integrate WhatsApp API into our online gaming platform - Optimize the API usage to avoid WhatsApp’s blockage during bulk and boosted messaging The ideal candidate will have: - Extensive knowledge and experience with Wati and WhatsApp API - Proven track record of successfully avoiding WhatsApp’s blockage during bulk messaging - Excellent problem-solving skills to fix our current issue with WhatsApp blockage during boo...

Multiformulario en Línea con tecnologías .NET 8.0 y Svelte en web Hitos: 1. El API 2. Portal de Administración General 3. Portal de Administración para Clientes 4. Pagina de cuestionarios

...bank transfers or digital wallets. - Use encryption for sensitive data storage and communication. #### Basic Architecture 1. **Frontend**: - **Framework**: React, Angular, or Vue.js for a responsive UI. - **Components**: User dashboard, group management page, contribution tracker, and notification system. 2. **Backend**: - **Framework**: Node.js with Express or Django for handling API requests. - **Database**: MongoDB or PostgreSQL to store user information, group details, contributions, and financial records. 3. **Hosting**: - Use cloud services like AWS, Heroku, or DigitalOcean for hosting the application. 4. **Payment Integration (if needed)**: - Integrate payment gateways like Stripe or PayPal for handling contributions. #### Implementation Steps 1...

Project Overview Seeking a Google Sheets expert to provide technical guidance for an NBA player/team analytics int...optimization advice - Problem-solving guidance - Knowledge transfer focus - Available for occasional video calls To Apply, Please Share 1. Similar projects you've completed in Google Sheets 2. Experience with sports data analysis 3. Familiarity with machine learning implementation 4. Your consulting/teaching approach 5. Typical availability and response times Tags: Google Sheets, Apps Script, API Integration, Machine Learning, Sports Analytics, Data Pipeline, Statistical Analysis, Automation, NBA, Sports Betting Note: Please include the phrase "NBA Analytics" in your response so I know you've read the complete job description.​​​​​​​​​​​​​​​​

I'm looking for a skilled Java develope...experience in AWS services, particularly AWS Lambda and S3. The task involves creating a REST API using AWS API Gateway that will enable image uploads to an S3 bucket. Key Requirements: - The REST API should be built using AWS API Gateway. - It must support uploading of JPEG images to the S3 bucket. - Ideally, you would have prior experience in developing similar projects and can provide relevant examples of your work. Please note, at this stage, I do not require any image processing or transformation before storing in S3. Skills and Experience Required: - Proficient in Java - Extensive experience with AWS services, particularly AWS Lambda and S3 - Familiarity with REST API development using AWS API...

I'm in need of a seasoned Full Stack Developer to help diagnose and rectify a communication issue between my frontend and backend. Wha...in need of a seasoned Full Stack Developer to help diagnose and rectify a communication issue between my frontend and backend. What you'll be working with: - A total of 9 files (nothing too overwhelming). - Frontend: HTML pages. - Backend: PHP and JS. Your tasks: - Identify and fix the errors in the code. - Ensure the website is secure after the fixes. Key Problem: - I'm experiencing errors in API responses. Please note, I just need the errors fixed so website can function as intended, not any additional features or improvements. I have already attempted to update the code, but the issue persists. Payment is received once work ...

...idea has already attracted significant interest, and I’m fully committed to working on this full-time, leveraging my network and resources to bring the platform to life. However, I’m missing a critical piece: a visionary CTO to lead the technical development. What’s in it for you? Equity-Based Compensation Creative Freedom: You’ll have ownership over the platform’s technical architecture, from API integration to user experience. Exciting Market Opportunity: Be part of a high-potential market that’s ripe for innovation, blending technology with a premium experience. I’d love to chat and see if this aligns with your skills and interests. If you’re passionate about creating tech that transforms how people invest in something as timele...

...specifically glucose levels. The device needs to be able to connect to some API/Webservices and display a value based on the return data Key Responsibilities: All configured via touchscreen Users will be able to select Wifi network via esp32 touchscreen - this gets them started They will then select which brand of glucose tracker they have The users will then insert there login credentials as required by the API And once logged in the monitor will display there current glucose levels as retrieved by the API , this will be a contious display on the screen showing nothing but a number - along side an indicator to show if the value is rising or decreasing. Users will be able to configure alarms which will trigger if the API reaches a certain value Quie...

My Laravel application has an issue where the Google Map is not appearing at all. I've checked my Google Maps API key and it is correctly configured. The integration method I'm using is the JavaScript API. I am looking for a Laravel and JavaScript expert who can troubleshoot this issue quickly and effectively.

achei projeto github sendo qe esta com problema mapeamentos entre a api e app estão diferentes apk ja esta pronto presciso corrigir esse erro de api e fazer uma imagem para rodar no docker como servidor apontando para o app e ja tenho servidor docker rodando aguardo respostas

I'm seeking a composer specializing in music for a musical. Your primary task will be creating an original score that embodies a dramatic and intense mood. (we can discuss plots and story lines) Key Responsibilities: - Compose an original, dramatic and intense score for a musical theatre production - Collaborate...be creating an original score that embodies a dramatic and intense mood. (we can discuss plots and story lines) Key Responsibilities: - Compose an original, dramatic and intense score for a musical theatre production - Collaborate with me on the music's direction and themes Ideal Skills: - Proven experience in musical composition, particularly for theatre - Strong understanding of conveying emotion and narrative through music - Ability to work collaborativel...

I'm looking for a C# .NET Windows application developer. The application needs to connect to the ServiceChannel API(), with functionalities to: - Perform CRUD operations on data, specifically updating existing work orders and retrieving all of them. - Utilizing OAuth 2.0 for API authentication. The developer must be able to demonstrate the application in Visual Studio 2022 (not Visual Studio Code) using Minimal APIs in .NET 7.0, as per this video: Essential requirements: - High-speed internet for remote demonstrations via desktop sharing and video conferencing apps. - Willingness to demonstrate the application for 2 hours in a video chat session. Please note

Job Title: EHR Medical Mobile App Developer & API Integration Specialist Job Description: We are looking for an experienced EHR Medical Mobile App Developer & API Integration Specialist to build and integrate mobile applications for healthcare providers. The role involves developing secure, user-friendly mobile apps using React Native or Flutter, ensuring seamless API connectivity with EHR systems, and maintaining compliance with healthcare regulations. Responsibilities: Develop EHR mobile apps using React Native or Flutter for iOS and Android. Integrate mobile apps with healthcare systems and third-party APIs (e.g., HL7, FHIR). Ensure HIPAA and security compliance. Troubleshoot, optimize app performance, and provide ongoing support. Collaborate with cr...

...changes should reflect on the related child product. When stock levels are updated manually for a master product, the app should recalculate and update the inventory for all related child products. Requirements Database Management: The app should include or connect to a database where relationships between master and child products are defined. Integration with Shopify API: The app must communicate with Shopify’s API to fetch and update inventory levels dynamically. Automated Updates: Inventory levels should be recalculated and updated automatically after every order or manual stock adjustment. Manual Trigger: Include a manual trigger to force an update of all inventory levels if needed. Scalability: The app should handle updates for a large number of pro...

I'm seeking a skilled WordPress developer to create a custom API for my site. The API's primary function will be fetching posts and pages from my WordPress database and returning this data in XML format. Key Requirements: - Proficiency in WordPress development - Strong understanding of API creation - Experience with XML Please provide examples of similar projects you've completed in your bid.

I'm seeking a proficient Flutter developer to create a cross-platform (iOS & Android) e...using a robust search engine and filter options. - **Shopping Cart and Checkout**: A seamless shopping cart and checkout process is crucial for a positive user experience. - **User Accounts and Profiles**: Users should be able to create accounts, maintain profiles, and track their orders. Payment Integration: The app should integrate PayPal as the primary payment gateway. Familiarity with PayPal's API is a plus. Ideal Skills: - Extensive experience in Flutter development - Prior experience in creating e-commerce applications - Knowledge of integrating payment gateways - Strong understanding of cross-platform app development. Please submit your proposal if you have the necessar...

hello the project i got from codecanyon api side Laravel front end app is flutter the payment method will be added to the project some payment methods are added to the project but those payment methods are not used in my country please check the project the payment method site to be added is friends who will be made write privately

hello the project i got from codecanyon api side Laravel front end app is flutter the payment method will be added to the project some payment methods are added to the project but those payment methods are not used in my country please check the project the payment method site to be added is friends who will be made write privately

I'm looking for a developer to create a VB.NET application that connects with Microsoft Teams. The application should be capable of: - Creating, deleting, and updating appointments/meetings - Integrating with Outlook calendar The application doesn't need a specific user interface. Only the code ...- Creating, deleting, and updating appointments/meetings - Integrating with Outlook calendar The application doesn't need a specific user interface. Only the code behinde functions would be enough. User authentication should be secure, using a Username and Password method in the code behind. This can be hard coded. Ideal candidates should have extensive experience with VB.NET, Microsoft Teams API, and Outlook calendar integration. Knowledge in developing secure authenti...

...OTP parsing and logging. Develop a user-friendly web interface to manage simulation workflows: Trigger OTP requests. Send spoofed messages mimicking trusted entities. Display received OTPs for demonstration purposes. Ensure secure and ethical handling of all data within the tool. Deploy the web application on a cloud hosting platform (e.g., AWS, Heroku). Requirements: Proven experience with Twilio API integration (SMS and Voice). Expertise in backend development using Python (Flask/FastAPI) or Node.js. Familiarity with web hosting platforms like AWS, Google Cloud, or Heroku. Knowledge of handling webhooks and asynchronous processes. Ability to use regex or similar tools for parsing OTPs from incoming SMS messages. Optional: Experience with caller ID spoofing tools or APIs for sim...

Due to Whatapp Block in my client website, we need to integrate with whatsapp API. So we need Whatsapp API Provider

...integrating technology with legal expertise, we aim to simplify and enhance the user experience in navigating the legal landscape of India. Our tech stack is a blend of modern and robust technologies to ensure reliability, scalability, and efficiency: Frontend Development: We leverage Flutter, enabling a smooth, cross-platform user experience for web and mobile applications. Backend Infrastructure: Our API Gateway, built using NestJS and TypeScript, ensures secure, scalable, and efficient communication between services. Content Management: With Strapi (CMS), we ensure a structured, user-friendly, and easily manageable content delivery system. Databases: We utilize MySQL and MongoDB to handle structured and unstructured data, ensuring flexibility and optimal data management. At ...

I need assistance in gathering data from Google Trends using the API. Specifically, I'm interested in tracking the search interest over time. The data should be delivered to me in a CSV file on a daily basis. If you have access to google trends API you can bid. I need to get trends data for several hundred keywords for last many years.

I'm looking for an experienced PHP developer who can create a script to synch...descriptions, as well as pricing and stock levels on a daily basis. - Ensure the use of API key for SHEIN marketplace API Ideal Skills: - Proficient in PHP - Experience with API integration - Knowledge of SHEIN marketplace - Strong understanding of eCommerce product synchronization Personal Text: I'm trying to publish my products on the SHEIN marketplace, but I find the API very confusing. I can't edit a product, I can't figure out which category to choose, or which attributes to select. The API returns errors that I don't understand how to fix. I need someone to help me publish and edit products on the SHEIN marketplace using PHP. I want someo...

...- OpenAI integration 3. Additional Technical Skills: - Database management (PostgreSQL) - API development - Cloud services (AWS/DigitalOcean) - Version control (Git) Project Overview: Building a fully automated, AI-powered lead generation system for B2C services, initially focused on roofing (7+ year shingle roofs) and pressure washing, expandable to any industry. COSTS & TIMELINE: Initial Development: - Budget: $1,000-1,500 - Timeline: 2-3 weeks Required Monthly Operational Costs (Must Specify): 1. Server/Hosting: - Cloud server expenses - Database hosting - Backup storage - SSL certificate 2. Service Integration: - Email service fees - SMS gateway charges - API usage costs 3. Monthly Maintenance: - System updates - Security patch...

I have an existing Laravel site that I would like enhanced with Google social login functionality. I already have the necessary API keys, so the task will primarily involve integrating the login system with the existing site. Ideal skills for this project include: - Extensive experience with Laravel - Proficiency in integrating API services - Prior experience with implementing social logins - Familiarity with handling existing web platforms Please ensure to provide examples of similar projects you have completed in your bid.

hello the project i got from codecanyon api side Laravel front end app is flutter the payment method will be added to the project some payment methods are added to the project but those payment methods are not used in my country please check the project the payment method site to be added is friends who will be made write privately

I need an expert who can make Filemaker Go take a picture of an invoice and use Google Cloud AI (API) and machine learning to read the document and extract various data points. This extracted information should then be input into my Filemaker server. I need to extract the following data points from the invoices: - Invoice number - Date - Total amount - Details from the different items - Different item names Ideal candidates should have: - Extensive experience with Filemaker Go - Proficiency in Google Cloud AI and machine learning - Skills in data extraction and server input - Capability to ensure the process is seamless and efficient

Seeking a seasoned backend developer with strong API experience and expertise in Java, Jason, and PHP. The ideal candidate will be proficient in working with cloud-based database systems. Key Responsibilities: - Develop and maintain backend components for various applications. - Integrate user-facing elements with server-side logic. - Implement APIs for seamless interaction between different software components. - Ensure high performance and responsiveness of applications. Ideal Skills: - Proficient in Java, Jason, and PHP. - Extensive experience with cloud-based database systems. - Strong understanding of API development and integration. - Excellent problem-solving skills and ability to work under pressure. Please note: Experience with web and mobile is a plus.

I have a Woocommerce website that needs an expert programmer with deep understanding of APIs and WebHooks. At checkout, the site should send order and customer information to our custom checkout platform via API call. After payment, a webhook callback should update the Woocommerce application. Key Requirements: - API call at checkout with order and customer info - Webhook callback integration post payment success - Woocommerce update with order status, inventory, and customer email Ideal Skills: - Proficient in Woocommerce programming - Extensive experience with API and WebHook integration - Knowledge of order management systems - Familiarity with inventory management systems Please provide examples of similar projects you've completed.

I need immediate assistance with my SMM Panel. The API limitations need to be addressed first as they are causing multiple orders to be sent to the provider, leading to profit loss. Key Issues: - API Limitations: The system is sending multiple orders to the provider when it should not. This is causing a significant financial mismatch. - Order Logging: The system is only storing one instance of a single order that has been sent multiple times, which is creating confusion in the order history. - Order Failure: Currently, when an order fails, the system only notifies the admin. It doesn't cancel the order or notify the provider. The ideal freelancer for this job should have extensive experience with SMM Panels and APIs. They should be able to fix these issues quickly and...

I need a professional with experience in WooCommerce and Google css centre to integrate my product listings with the Google Comparison Shopping Service. Key Requirements: - Transfer over 2000 products from my WooCommerce store to the Google CSS via the CSS API. - Ensure all products are correctly listed and optimized for comparison shopping. Ideal Skills: - Proficiency in WooCommerce - Experience with Google Merchant Center and CSS API - Attention to detail for product listing - Ability to troubleshoot and resolve potential issues during the process.

...cashback cards). • Push notification functionality (e.g., for promotions, reminders). • Built-in CRM to track customer activity and loyalty stats. • QR code generation for easy card distribution. • White-labeling options to match our brand identity. 2. Languages and Localization: • The platform’s website and interface should be fully in Turkish. 3. Technical Requirements: • Compatibility with API integrations for CRM and POS systems. • A mobile scanner app for card processing. • Analytics dashboard for tracking loyalty program performance. 4. Experience: • Preference will be given to candidates who have previous experience with similar digital loyalty or wallet projects. Deliverables: • Fully functional web-bas...

...defining the questionnaire (see attached sample ), the code will simulate a questionnaire, interacting with clients using various message types: text, images, lists of options, buttons and links. Key Requirements: - Utilization of the Venom API for WhatsApp. (or use wappconnect, whatsapp biz api or similar) - code can handle different types of questions: text-based, image-based, and using list options or buttons or links. - answers will be saved in JSON format (see attached ) - if you use whatsapp biz api, we will supply Token. Ideal Skills and Experience: - Extensive experience with Node.js and the Venom and or any BOT system for WhatsApp. - Demonstrable ability to create interactive bots. - Proficiency in handling diverse message types and user responses. -

...Predictive analytics - OpenAI integration 3. Additional Technical Skills: - Database management (PostgreSQL) - API development - Cloud services (AWS/DigitalOcean) - Version control (Git) Project Overview: Building a fully automated, AI-powered lead generation system for B2C services, initially focused on roofing (7+ year shingle roofs) and pressure washing, expandable to any industry. COSTS & TIMELINE: Initial Development: - Budget: $1,000-1,500 - Timeline: 2-3 weeks Required Monthly Operational Costs (Must Specify): 1. Server/Hosting: - Cloud server expenses - Database hosting - Backup storage - SSL certificate 2. Service Integration: - Email service fees - SMS gateway charges - API usage costs - Payment processing fees 3. Monthly Maintenance: - System updates ...

...Telegram business account. The tasks include: [Basic Tasks] 1. Add Buttons to Messages • Implement action or link buttons within Telegram channel messages. 2. Add Buttons to Tags • Create custom buttons related to tagging or categorization of posts. 3. Implement Payment Buttons • Integrate payment buttons allowing users to make transactions directly via Telegram (using Telegram Bot Payments API). 4. Create Multi-Channels • Set up and link multiple channels for different target audiences or purposes. 5. Develop Menu Buttons • Build a custom menu for easy navigation and improved user experience. 6. Build a Mini App (Optional) • Develop a Mini App within Telegram, such as a product catalog, quiz, or other interactive features. 7. Additional...

...integrating APIs and implementing a range of functionalities. Key Requirements: - Developing a user-friendly eCommerce app using Flutter - Integrating provided Figma designs into the app - API integration - Payment gateway integration - Implementing push notifications Please note that the specifics of the eCommerce functionalities have yet to be defined, as the user skipped that question. However, a solid understanding of common eCommerce app features such as user authentication, product search and filters, and order tracking would be beneficial. Ideal Skills: - Extensive experience with Flutter - Proficiency in API integration - Prior experience in developing eCommerce apps - Understanding of Figma designs - Knowledge of payment gateway integrations - Experience with ...

eu preciso de um sistema de pagamento integrado Dhrufusion porque ele não vem com a função pagamento via Pix porém eu já vi outras pessoas que conseguiram Eu não tenho nenhuma noção de como faz eu vou estar anexando aqui a foto de como a pessoa adicionou o Pix lá no servidor dele

I'm seeking a talented Python developer to create a Windows-based desktop application that fetches and combines options charts from two strike prices. Key Requirements: - Proficient in Python, with prior experience in desktop application development. - Understandin...Key Requirements: - Proficient in Python, with prior experience in desktop application development. - Understanding of financial options and ability to implement this in the software. - Familiarity with Windows OS and its application development standards. Please bid if you have the required skills and experience. Looking forward to your proposals. what you need to do: 1. fetch data from brokers api 2. create interface using tkinter 3. min two leg strategy max 4 leg 4. spread chart you can take reference from

...fields (like firstName, address, city, property type, market value, etc) during calls. - Call notes and responses are logged back to the appropriate row in Google Sheets after each call. - Automatic call scheduling based on lead lists. - Status columns in Google Sheets that update automatically based on call outcomes. Skills Required: - (formerly Integromat) - Google Sheets Automation - API Integrations () - Python or JavaScript (Optional, for custom scripts) - Experience with CRM or lead management automations is a plus Project Deliverables: - Fully functional workflow automating the Vapi and Google Sheets integration. - Documentation or a walkthrough on how to modify/update the automation. - Testing to ensure calls are logged correctly, and notes are updated in Sheets

We have submitted our papers for mtn momo payment gateway and they gave us an excel sheet to do testing and fill it, testing should be made on sandbox before making integration with wordpress. linked the guide site from mtn and attached the excel file they gave us. Note: please dont submit if you didnt do this before. i will provide you with: Ocp-Apim-Subscription-Key api user api pass

I'm seeking a skill...skilled bot developer to create a tailored order processing bot for my WordPress WooCommerce site. This bot will handle orders based on transaction data, which can be fed either through an API or manual input. Key Requirements: - The bot should be capable of both receiving transaction data via an API and accommodating manual input. - It must automate order processing and manage inventory efficiently. - Some degree of customization for order processing rules is necessary. Ideal Skills and Experience: - Proven experience in developing similar bots for eCommerce platforms, particularly WooCommerce. - Proficient in API integration and data handling. - Knowledgeable in inventory management systems. - Capable of implementing moderate levels of c...

I'm looking for a skilled developer to assist with updating existing test series via an API. Ideal Skills: - API development and integration - Experience with test series platforms - Problem solving and analytical skills Job Responsibilities: - Update existing test series with new questions and answers using the Test Series API - Ensure a smooth and efficient update process There are mainly four things to do- 1)Test series api 2)Current affairs Quiz api 3)Current affairs api 4)Check push notifications Please note, there will be no need to implement specific features in the questions and answers module for this project.

...Add multi-currency support and savings goals. Enable cloud sync and backup. Phase 4: Testing and Optimization Conduct user testing for performance and bug fixes. Optimize app for seamless performance across devices. Phase 5: Deployment and Maintenance Publish app on Google Play Store and Apple App Store. Monitor performance and release regular updates. API Requirements: Currency Conversion API (e.g., Open Exchange Rates, XE API). Notification Service (e.g., Firebase Cloud Messaging). Analytics Integration (e.g., Google Analytics or Mixpanel). Future Enhancements: Integration with banking APIs to fetch transaction data automatically. Support for family accounts with shared budgets. Gamification elements like challenges to reduce spending in specific ca...

I'm in need of a fullstack Flutter developer who can fetch API from my backend Node.js and create a smooth and polished UI for my app. The app will operate on an IAP subscription model and should be completed without hesitation. Key Responsibilities: - Integrate user authentication, in-app purchases, and real-time notifications into the app. - Utilize existing design assets to create a modern and polished UI. - Ensure the app is smooth, stunning, and fits the IAP subscription model. Ideal Skills and Experience: - Proficiency in Flutter and Node.js. - Experience in developing fullstack applications. - Ability to create modern and polished UIs. - Familiarity with integrating user authentication and in-app purchases. - Capability to implement real-time notifications. - Prior exp...