Open source payment gateway website java jsp jobs

I'm looking for a skilled network specialist to assist me in configuring my existing Unifi Gateway, CloudKey, and Access Points for enhanced security. Key Requirements: - Configuration of Unifi Gateway, CloudKey, and Access Points: The primary goal is to enhance the security of the network. Therefore, the specialist will need to ensure that the configuration aligns with this objective. Ideal Skills and Experience: - Proficiency with Unifi network devices: The specialist should have hands-on experience with Unifi Gateway and Access Points. Experience with CloudKey would be a plus. - Network Security Expertise: A strong understanding of network security principles and best practices is essential. Additional Information: - Although the Unifi Switch is part of my c...

The goal is to develop a “media gateway” device able to receive a panoramic video from 2 cameras (for wider field of view) in RTSP/RTMP format and produce “professional-like” broadcast video to OBS to be further mixed, add graphics and etc and late streamed to Youtube (RTMP). To do so, the system will be able to crop the original panoramic video in a way that “follows the action” and simulates the panning movement. This production needs to be fully automatic, with no human intervention beyond activating / deactivating the stream and calibration to the field. Example of open source program:

...setting up an E-commerce website, I'm in need of a skilled developer. The site's primary objective is to offer a platform for selling 50-100 products, a task which requires a professional who can incorporate key E-commerce features. The essential features needed are: - **Payment Gateway Integration**: The website should be able to securely process payments from various sources. This requires a developer with prior experience in setting up secure and efficient payment systems. - **Customer Review Functionality**: The inclusion of a customer review section is crucial for fostering trust and boosting sales. A freelancer who has experience in implementing such features is preferred. - **Live Chat Support Integration**: To provide real-time supp...

I'm in ...popular job posting websites. - The platform should have a straightforward job posting and application process to encourage user engagement. - User accounts and profiles should be manageable, enabling both job posters and applicants to track their activity. - I need the site to be secure, with encrypted user data and a reliable payment gateway for potential premium features. Ideal Skills and Experience: - Proficiency in web development, with prior experience in job board website construction. - Strong understanding of e-commerce features, as the site will involve job seekers and job posters. - Knowledge of user experience and interface design to ensure a smooth user journey. - Familiarity with security measures for online platforms, especially in relati...

I'm in need of an experienced Android developer to update our Java-based app, originally designed for Android 5 KitKat, to work seamlessly on modern tablets. Key Requirements: - Improve User Interface: The project involves enhancing the app's existing UI. - Compatibility Upgrade: The current app is only compatible with Android 5 KitKat; the developer must ensure it functions smoothly on contemporary tablets. Additional Information: - The app currently consists of 6-10 screens or activities. - A new feature will be the integration of Bluetooth connectivity. -The app controls hardware via bluetooth, sends PWMs and reads ADC values and reads/writes to an rs232 info stream

...platform will have a variety of features including user registration and login, gift card selection and customization, and payment integration. Additional Features: - Gift card balance tracking: This is a crucial aspect of the project. Users should be able to easily track their gift card balances. - More: I'm also interested in potentially integrating more features as the project progresses. API Integration: - Gift card vendor APIs: It will be essential to integrate various gift card vendor APIs to ensure a wide range of choices are available. - Payment gateway APIs: Payment integration is a core feature. The platform should be able to accept various forms of payment securely. - Customer relationship management (CRM) APIs: Integration with CRM...

I urgently need a skilled developer to integrate PhonePe as a payment gateway on my Wix website. Here's what's needed: - Experience in integrating PhonePe or other similar payment gateways - Familiarity with Wix development - Capability to work quickly, as I need this completed ASAP

I am looking for a skilled developer to set up pixel tracking on my Opencart 3 website. This is for the purpose of monitoring sales conversion. The pixel tracking should be specifically integrated with Barion, a payment gateway in Hungary. Details: Key Responsibilities: - Implement pixel tracking on my Opencart 3 website - Set up the tracking for monitoring sales conversion - Ensure the pixel tracking is correctly integrated with Barion Ideal Skills and Experience: - Strong experience with Opencart 3 - Proficient in pixel tracking implementation - Familiarity with Barion or similar payment gateways

...The project is to create a unique E-commerce website with a variety of specific features. Key Requirements: - Integration of Payment Gateways: This will be a fully functioning E-commerce website, so it's crucial that it supports a variety of payment methods. - Customer Reviews: The site should allow users to leave reviews and these reviews should be incentivized - users should earn credit when they write a review or share their experience on Instagram. - Inventory Management: I need a system that allows me to easily manage inventory and stock. - User Photo Upload: I want to enable users to upload their own photos at a specific segment on the website. - International Shipping with Tracking Number: As an E-commerce site, it's important that th...

I'm looking for a skilled software developer who is proficient in Java and familiar with the DJI drone SDK. Seeking individual with HTTP and DJI SDK experience to add features to DJI Ground Control Software. The application must transmit and handle HTTP REQUEST to server, display popup messages, play notification audio, and auto-upload waypoint to a selected drone. Key requirements: - You must have experience in software development on Windows OS. - Proficiency in Java is a must. Experience with DJI drone SDK is highly preferred. - The main feature to be added to the software is automatic drone flight path planning. Key responsibilities: - Integrate the DJI drone SDK into my existing software. - Implement automatic drone flight path planning feature. This project wi...

I'm in need of a skilled React/ developer to work on an already designed project. The design is ready and I need someone who can hit the ground running. Key tasks include: - Integrating a payment gateway (Mercadopago) into the application. This is a crucial aspect of the project. - Working on other functionalities that might be required for the smooth running of the application. Ideal skills and experience: - Proficiency in React and is essential. - Proven experience in integrating payment gateways, especially Mercadopago, is highly desirable. - Good understanding of the nuances of user authentication and profiles would be appreciated. - E-commerce capabilities experience is a plus. Your ability to work with pre-existing designs is important, so please be read...

I'm in need of a skilled and experienced games programmer to help me create a mobile game with a strategy genre. The ideal candidate for this project should have the following qualifications: - Proficiency in C++, Java, and Python, as these are the languages I'm familiar with and would like to use for this project - A proven track record in developing mobile games, with a preference for strategy games - Strong understanding of game design principles and mechanics - Ability to work collaboratively, take direction, and provide valuable insight and feedback - Excellent problem-solving skills and a keen eye for detail If you have the necessary skills and are passionate about creating engaging, high-quality mobile games, I'd love to hear from you. Please provide examples...

I'm looking for a Shopify expert to help me create a visually appealing store that's optimized for sales. I expect the freelancer to: - Design a clear, user-friendly layout that drives conversions - Ensure the store is mobile responsive - Implement product listing and payment gateway - Offer SEO friendly design for better visibility Please note that I'm open to suggestions and would appreciate your creative input. Kindly share your previous experience and any relevant samples in your proposal.

...provide a sound alert to notify me. Key Details: - The program needs to be fast to cater for frequent changes in millisecond time-frames. - I don't have a preference for a programming language. Python, Java, and C++ are all acceptable. - At this stage, I'm unsure which order flow software I'll be using. Therefore, the program needs to be built with adaptability in mind to synchronize smoothly with any potential order flow software. - A sound alert should be triggered whenever a three-digit number pops up. Ideal Skills and Experience: - Proficient in programming languages (especially Python, Java, C++) - Experience in developing real-time monitoring software - Understanding of trading platforms and order flow software - Excellent problem-solving abilities...

I'm in need of an experienced Java Script developer that can resolve a peculiar issue with my implementation. Here are the specifics: - All of the data I'm showcasing are ALL DAY events. - The events are not appearing in the Week and Day views, however, they do display as expected in the Month and List views. - I am using a version of that's not the latest. I'm looking for a professional who can: - Investigate the issue and implement a fix to ensure the ALL DAY events are correctly displayed across all views. - Offer advice on whether updating to the latest version of would help address the problem. The ideal candidate should have: - Profound experience in Java Script development. - A deep understanding of functionalities and

I'm in need of a skilled Wordpress developer who can create a custom online order form for my website that will adjust product pricing based on quantity and automatically send a WhatsApp message to the customer. Key Requirements: - The order form should include: Products name, Quantity, Customer name, Customer address, Email, Whatsapp Number, Address, Pincode. - The form should be designed to update the total price based on the quantity entered. The project does not require integration with a specific payment gateway; the form will be used for order processing and communication purposes only. The ideal candidate for this project should have: - Extensive experience in Wordpress customization and plugin development - Proficiency in creating custom forms in Word...

Looking for an android developer Java,Kotlin,JSP, Servlets, MQ series, Hibernate, Python, Microservices, Swings, WebSphere-Portals, HTML5, Bootstrap, JavaScript, Bigdata, Linux Frameworks Android Mobile App Development, Spring boot, Struts, Hadoop This will be ongoing

...User Registration & Login: A seamless process that allows users to sign up and access the platform with ease. - Messaging System: A built-in messaging system that enables users to communicate with each other. - Forums for Discussions: A space where users can create and participate in discussions, fostering a sense of community and collaboration. Third-party Integrations: - Payment Gateway: Integration of a payment gateway to facilitate any financial transactions that take place within the platform. - Social Media Integration: Integration of popular social media platforms to enable users to share content and connect with their social networks. - Email Marketing Platform: Integration of an email marketing platform to facilitate communication with users thr...

I'm in need of an experienced Android developer to create a productivity app that primarily focuses on calculations. Key Features: - The app will be centered around calculation functions - Users should be able to make basic arithmetic ca...of an experienced Android developer to create a productivity app that primarily focuses on calculations. Key Features: - The app will be centered around calculation functions - Users should be able to make basic arithmetic calculations - The app needs to be user-friendly and intuitive for quick calculations Ideal Skills and Experience: - Strong background in Android development, proficient in Java or Kotlin - Previous experience building productivity apps - Prior experience working with calculation functions - A good understanding of UX/UI...

I am looking for a seasoned developer to create a robust messaging gateway that supports multiple platforms and is capable of handling a high volume of messages. Key Requirements: -Building a messaging gateway and communication platform to enable applications and systems to send and receive messages through SMS, Email messages or Mobile Push Notifications with a variety of connection options and integration channels. - A dedicated on-premise messaging gateway that provides better visibility and control on sent messages and notifications - Improved security and control over sent messages with masking and filtering options - Higher availability with offered load balancing, bulk providers switchover and different sending methods - Seamless operation and integration...

...create a professional, scalable eCommerce website for a catalog of over 100 products. The website will need to feature essential eCommerce functions such as a shopping cart, customer reviews section, and seamless payment gateway integration. Key requirements: - Development of a large scale eCommerce website with a catalog of over 100 products - Implementation of a user-friendly shopping cart system - Integration of a customer reviews section to enhance the credibility of the products - Seamless integration of a secure and efficient payment gateway Ideal Skills and Experience: - Proven experience in developing large scale eCommerce websites - Proficient in implementing essential eCommerce features like shopping carts, customer reviews, a...

I'm in need of a skilled programmer to develop a script that can serve as both a Man-in-the-Middle (MITM) and a Reverse Proxy tool. The primary goal of this script is to assis...restrictions. Key Project Requirements: - The script should be compatible with Windows, MacOS, and Linux. - It should effectively intercept network traffic and support the following network protocols: HTTP, HTTPS, and TCP. - The script should also have the capability to act as a Reverse Proxy tool when needed. Ideal Skills and Experience: - Proficiency in programming languages like Python, C++, or Java. - Experience in developing network security tools or reverse proxy systems. - Knowledge of network protocols and their interactions. Please, only bid on this project if you have the necessary skills ...

...will be a bus ticket booking system with a payment gateway integration. Key Features: - Seat Selection: Users should be able to select specific seats when booking tickets. - Route Selection: The application should allow users to choose their desired bus route. Design: The design of the application should be minimalist and clean. The focus should be on simplicity and ease of use. Nepal Payment Gateway: I prefer to integrate Nepal's payment as the payment gateway into the application. Please make sure that the integration is secure and user-friendly. Ideal Skills: - Proficient in Flutter for both iOS and Android platforms. - Experience in designing user-friendly and clean interfaces. - Prior experience with integrating PayPal or si...

Hello, I'm in need of a responsive website dedicated to tracking scores for various golf games, starting with Footgolf. While there is an existing website for this purpose ( - the website is not mine, just an example), it lacks structure and ease of use. I'm seeking a straightforward and responsive solution to address this gap. Key Functionalities Required: User Registration: Users should be able to register on the website, providing a profile name and picture. They should also have access to their tournament history and scores. Admin Features: The platform should allow for the registration of admins who can create tournaments. Each tournament should have defined start and end dates, with the option for participants to purchase tickets. Tournament...

The developer should have the following skills and experience: 1. Proficient in Java, Kotlin and other programming languages; 2. Have a deep understanding of Android platform, familiar with Android SDK and related tools; 3. -- If you have an already published app you can! Out -- for s-a-l-e! . If you are interested, please feel free to contact us and look forward to further communication with you.

I'm searching for an experienced Android developer to work on a self-help app that...app is to track the user's progress. Key Features: - User Registration and Login: The app should incorporate a straightforward registration and login system to ensure user engagement. - In-App Purchases: It's essential that the app supports in-app purchases to enable users to access premium content or features. The developer should have the following skills and experience: 1. Proficient in Java, Kotlin and other programming languages; 2. Have a deep understanding of Android platform, familiar with Android SDK and related tools; 3. -- If you have an already published app you can! Out -- for s-a-l-e! . If you are interested, please feel free to contact us and look forward to furthe...

I'm in need of a skilled PHP Yii 2 developer to create a robust platform with user authentication, API integration, and a payment gateway. Key project requirements: - Use1. We've implemented razor pay in frontend but in backend it's phone pe so order I'd is not coming we've to fix that 2. Currently login sign up is email id and password we've to change that flow to phone number OTP login and it's already there for forgot password flow we've to modify that and use it for login 3. Once payment is successful then there's an appointment booking api that needs to make an appointment there's small fixes in it 4. There's a doctor's profile api where it should give doctors fee sometime it's not coming The...

I'm seeking an Android developer with a strong grasp of Java programming, Android SDK, and UI/UX design for a straightforward project. Key Features: - The app should be capable of user authentication. Primary Goal: - The main objective is to create a basic calculative with admin approval of features and scrollong images which can be changed application. App is similar to video attached The ideal candidate will have experience in developing clean, user-friendly Android applications with a focus on accurate calculations. Experience in UI/UX design is a plus, as we aim to provide a sleek and intuitive user interface.

We are seeking a skilled developer to crea...system that can be used on both Android and iOS platforms. The system should allow users to easily locate nearby car wash stations, select their preferred service package, make payments, and receive notifications. The ideal candidate should have expertise in Android and iOS app development, as well as experience with GPS integration, payment gateways, and push notifications. 1. At least 2 years of experience in Android application development 2. Proficient in Java or Kotlin programming languages and Android development tools and frameworks 3. Have a certain understanding of mobile application design and user experience 4. If you have published applications for s-/--a--/--l---/-e, I am interested and look forward to further commu...

I desperately need to get apps, especially those available on the Google Play Store. ...apps, especially those available on the Google Play Store. My interests lie in a broad range of application types, including gaming, tools, lifestyle, entertainment, and news applications. All applications except finance, wallpapers. And requires a certain amount of downloads. key point: Have a certain number of downloads - The apps should be available on the Google Play Store. Make sure the source file signature file is complete. - I am particularly interested in games, tools, lifestyle, entertainment and news apps. Your role is to sell me the rights to your application. Experience using applications in these specific categories (games, tools, lifestyle, entertainment, news) will be a major ...

I'm looking for a telesales expert who can help generate bookings for our self-drive car rental service, specifically targeted at tourists, local residents, and business travelers in India. Key Requirements: - The primary task is to make outbound calls to potential customers, generating leads and converting them into bookings. - The ideal freelancer should have ...into bookings. - The ideal freelancer should have considerable experience in telesales, with a proven track record of generating leads and closing sales. - Understanding of the Indian market and travel industry would be advantageous. - You are expected to be fluent in English and any additional knowledge of Indian languages would be a plus. Please ignore the online booking system and secure payment gateway fe...

...Rest Assured to implement it in an API testing project at work. Key Requirements: - Experience in Java, BDD, Serenity framework, and Rest Assured - Able to guide and teach on: - Understanding an automation project - Creating and executing tests - Reporting - GIT Integration The project is centered around API testing, so any specific experience here is a plus. I'm looking for a patient, experienced professional who can help me grasp the fundamentals and guide me through the intricacies of implementing automation with the mentioned frameworks. There are existing scripts in place which I need to understand and also create new scripts and execute on my own. Ideal Skills: - Strong Java background - Experience in BDD - Expertise in Serenity framework and Rest As...

...developer to help me create a straightforward website with just two pages. This website will mainly focus on a rent payment functionality. Key Features: - Only 2 pages: Homepage and Rent Payment Page. - The homepage will be minimal, showcasing only a brief introduction and a clear call-to-action leading to the rent payment page. - Rent Payment Page: This is the core of the website, where tenants can easily submit their rent payments. The rent payment should be simple and user-friendly. Functionality: - The payment process should be direct and hassle-free. - I want the payments to go directly to my personal account. Ideal Skills: - Proficient in web development with experience in building simple, yet functional website...

I'm looking for an expert in custom-built web solutions to create a sleek, single-page website with a professional and formal design aesthetic. This website should have the core functionality of processing credit card and debit card payments, thereby aligning with the e-commerce standards. Key Requirements: - Experience with custom-built websites. - Expertise in payment processing integrations. - Proven ability in creating professional and formal website design. - Understanding of best practices for one-page site layout. Looking forward to hearing from those who can achieve these goals efficiently and effectively.

I'm looking for a skilled professional who can solve advanced level CTF challenges, in various categories. I need someone who can tackle challenges in Web Exploitation, Binary Exploitation, Cryptography, as well as other categories like web, forensics, osint, and more. Key Responsibilities: - Solve advanced level CTF challenges ...experience with CTF challenges - Proficiency in solving challenges in Web Exploitation, Binary Exploitation, Cryptography, web, forensics, osint, etc. - Proven track record of solving advanced level CTF challenges - An understanding of security concepts Please note that the specific programming languages or platforms to be used in solving the challenges are not specified, but your background in Python, Java, C++, Ruby, or other relevant languages ...

I'm seeking the expertise of a seasoned developer to create a customized chat functionality for a project I'm currently running. After careful consideration, I've decided to focus on grou...be modern and dynamic, capable of handling in-message media sharing. This means users should be able to share images, videos, and other rich media content within the chat conversation seamlessly. If you've designed such interfaces before, you're the person I'm looking for! Skills such as Java, Python, or PHP are desirable. Exceptional knowledge of web sockets is a must for real-time chat functionalities. An understanding of user experience is also essential, as the platform must be user-friendly. I'm open to suggestions on how to make this project a succ...

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I'm seeking assistance with an urgent issue that's emerged with my softphone engine. - **Operating System**: My system is running on Windows. - **Programmin...issue that's emerged with my softphone engine. - **Operating System**: My system is running on Windows. - **Programming Language**: Unfortunately, the programming language of my softphone engine has been omitted. I believe it may be C#, Java, or C++. It's imperative that the freelancer is comfortable with these languages to handle the issue. - **Timeline**: I'm in need of immediate assistance to solve this problem. Ideal candidates should be able to troubleshoot softphone issues and have experience with Windows software development. Experience with C#, Java, and C++ is a plus. The ability to...

...including ID cards, receipts, invoices, paper, and passport photos, and saving them in JPEG format. As such, the app should be able to: - Recognize and accurately scan ID cards, receipts, invoices, paper, and passport photos - Provide a seamless and user-friendly experience for scanning documents - Showing Auto or Manual Edge Cropping, Image Rotation - Using OpenCV - Native Android (Android Studio), Java I would like the app to be specifically tailored for Android, ensuring a smooth user experience and a clean, intuitive interface. Ideal Skills and Experience: - Proficiency in Android development - Experience in developing document scanning apps - Familiarity with image recognition and processing - Ability to create a simple and user-friendly interface - Knowledge of saving...

I need a global escorting job site developed, focusing on user registration and profiles, job listing and search functionality, and payment gateway integration. - **Scope**: The site should have a global reach, meaning it should be accessible and functional in all countries. - **Features**: The key features required include user registration and profile creation, job listing and search capabilities, and a secure payment gateway integration. - **Security & Privacy**: Your expertise should be able to implement robust security measures, including user data encryption, two-factor authentication, and anonymous browsing options. Ideal skills and experience for this job include a strong background in web development, experience with building job sites or simila...

...looking to create a website on Stackblitz, that will serve as an e-commerce platform exclusively for the sale of electronics. I have some specific requirements and features that I'd like integrated into the site: - Payment Options: I'd like to have various payment options for customers including credit/debit card, PayPal, and cryptocurrency (Bitcoin in particular). - User Interface: The website should be user-friendly and visually appealing. - Withdrawal Options: I'd like to have a smooth process for customers to withdraw funds from their account on the website. Ideal Skills and Experience: - Proficiency in Stackblitz - E-commerce website development experience - Understanding of cryptocurrency payment integration - S...

I'...setting up a system for offline payments. The primary aim is to offer more payment options for customers who are not comfortable with online transactions. Key Responsibilities: - Implement a secure and user-friendly offline payment method, specifically bank transfer, for domestic transactions. - Ensure a smooth payment process for customers who prefer not to use online payment methods. - Set up a system that is compliant with local business regulations. Ideal candidates should have experience in: - Payment systems and methods, especially bank transfers. - Understanding of the benefits and challenges of offline payment systems. - Compliance with local business regulations. - Prior experience in setting up offline payment systems i...

We are seeking for a developer to build a transportation app with Laravel and VueJS on web part, and flutter for mobile. A part of the system is already built. The github repositories will be shared. Documents and wireframes will be shared too. The system is composed of three parts: -Booking website: from where the clients book vans -Fleet management back-office: from where cars an trips are managed. Cars have a planning filled with booked trip. The main challenge is the availability calculation, that has a complete document wrote down. -Flutter mobile app for drivers, to check there schedules, and do reports (app already coded, to complete) It may need confirmed experience given that the initial developer (intermediate) had some difficulties winding it up. I stay at your disposal t...

I'm looking to develop an e-commerce site specifically for selling digital...services. I need a proficient web developer experienced in creating user-friendly and secure e-commerce platforms. Key Functions Include: - Subscription management: The website should allow users to easily manage their subscriptions, including signing up, payment processing, upgrading, downgrading, and canceling. - Secure payment gateway: The site must have a fully-integrated, secure payment system that can handle regular subscription payments. Skills & Experience Required: - Proven track record in e-commerce website development. - Expertise in setting up and managing subscription services. - Proficiency in secure payment gateway integration. ...

I'm looking for experienced web developers to build an e-commerce website for my business. Here's what you need to know: - Purpose: The main goal of the website is to sell my products online. I plan to list between 100 to 500 different items, so the website should be able to accommodate this range without any difficulties. - Functions: The website must include a shopping cart and a payment gateway. These features are essential to the operation of my business as they will allow customers to make purchases directly from the site. Ideal Skills: - Experience with e-commerce web development, specifically with shopping carts and payment gateways - Knowledge of best practices for listing and managing a large inventory of products If y...

I'm looking for a skilled application developer to create a mobile app for my gaming website. The app should be designed for both iOS and Android users. Key Features: - User Registration and Login: The app should allow users to create accounts and log in securely. - Game Browsing and Searching: Users should be able to easily search and browse through the games available on my website. - In-App Purchases: The app should support in-app purchases, allowing users to buy games or any other digital items directly within the app. Integration Requirements: - Payment Gateway: The application will need to be integrated with a secure and reliable payment gateway. - Social Media Platforms: It should also have social media connectivity to allow users t...

This project consists in two stages. The first one (included on this budget) is creating an eLearning using Wix and Wix's Course App. The project will use MercadoPago as a payment gateway. Good design skills will be appreciated. The second stage (for a future budget) is improving the eLearning and switching into a CMS, in which other users will be able to upload their courses and get paid through the platform.

For my project, I need a talented blockchain developer versed in: - Smart contract development - Token creation The potential freelancer sh...need a talented blockchain developer versed in: - Smart contract development - Token creation The potential freelancer should have solid experience in programming languages such as Solidity, JavaScript, and Python. This is crucial as these are our preferred languages for blockchain development. The project would require a deft handling of: - Wallet integration - Exchange integration - Payment gateway integration Therefore, prior experience and success in these aspects would be beneficial. This project demands someone with a deep understanding of ERC20 token fundamentals and the ability to deliver flawlessly on the incorporation o...

I have a source code for android video streaming app in java, xml, and i need to change the design of the app frontend I am looking for someone who can make changes to android app code design and recreate the frontend. below i have attached the design of my app, and want to reformat it according to zee5 app design. If you feel its a good fit for you, i welcome your bid. thanks.

Overview: We are looking for an experienced Java developer to refactor an existing code base to incorporate several design patterns and improve overall code quality. This project involves enhancing the structure and maintainability of the code by integrating various design patterns, such as Dependency Injection (DI) using Google Guice, Listener, Builder, Singleton, and, optionally, Factory design patterns. The ideal candidate should understand these patterns strongly and have experience refactoring legacy code. Key Responsibilities: 1. Refactor Service Classes with DI Pattern: - Utilize Google Guice API to implement Dependency Injection across all service classes. - Ensure that all dependencies are injected and managed by the Guice framework. 2. Apply Listener Design Pattern...