Aws php sdk s3εργασίες

... - Update colors, fonts, and layouts to align with a professional, branded appearance. - Replace default branding with a custom logo, favicon, and design elements. - Adjust input forms, buttons, and navigation for a polished look. - Ensure the interface remains user-friendly and responsive on all devices. Hosting the Application: - Deploy the customized application on a cloud platform (e.g., AWS, GCP, or Azure). - Configure the application to support multiple concurrent users with basic authentication or invite-only access. - Set up HTTPS and ensure the application is secure for external users. - Testing and Deployment: - Validate the functionality post-customization to ensure the system works as expected (document upload, multi-modal QA, etc.). - Conduct testing for responsi...

...Industry Solutions Enterprise Resource Planning (ERP) systems Customer Relationship Management (CRM) solutions Business Intelligence and Analytics platforms Workflow automation systems Our Technical Expertise Frontend: React.js, Angular, Vue.js, HTML5/CSS3 Backend: Java, Python, Node.js, .NET Mobile: iOS (Swift), Android (Kotlin), React Native Database: SQL, NoSQL, MongoDB, PostgreSQL Cloud: AWS, Azure, Google Cloud DevOps: Docker, Kubernetes, Jenkins Our Development Approach Agile methodology with iterative development Regular client communication and progress updates Comprehensive testing and quality assurance Post-deployment support and maintenance Documentation and knowledge transfer Why Choose Us Proven track record of successful project delivery Experienced team of c...

I'm looking for a skilled developer who can help me integrate my PHP application with the Microsoft Graph API. The primary goal of this project is to automate workflows specifically related to Device Management and Enrollment services in Office 365. Key tasks include: - Automating device enrollment processes by providing a php script that will allow us to automate enrolment into customer tenancies and also remove devices from customer tenancies. Ideal candidates should have: - Proficiency in PHP - Experience with Microsoft Graph API - Ability to create an application to make sure this works. - Understanding of Office 365 Device Management services - Skills in workflow automation

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I need to integrate current project to have customized chats with unique knowladge, so each account has his own knowladge and can talk with the AI. In order the knowladge is missing the syetem should sent question to general LLM. Current project in react and nodejs , aws Optionally also Avatar AI generation like emulateme Plus put real prices , experiance and project examples and estimated timeline

I'm looking for an experienced PHP developer to create a secure, performance-optimized user management system within a PHP MVC framework. This system should encompass features such as: - User registration with email activation using PHP Mailer - User login - 'Forgot Password' functionality - Bootstrap 5.3 for responsive design - Server-based validation - User-friendly notifications via session on every action Security is paramount in this project. The application must be robust against various types of attacks, specifically Cross-Site Scripting (XSS), Cross-Site Request Forgery (CSRF), and SQL Injection. Additionally, a configuration file should be created with BASE_PATH and BASE_URL for easy management. Forms must be secure, implemented with CSRF an...

I need a skilled PHP developer to create a system that exports data from my MySQL database into PDF/A-1a formatted documents. The PDF/A-1a will need to incorporate text, images, and tables from the database. Key requirements: - Proficiency in PHP and MySQL - Experience with PDF/A-1a format - Ability to create structured layouts with sections - Understanding of exporting diverse data types (text, images, and tables) The ideal candidate will have a strong portfolio that demonstrates their ability to deliver high-quality, accurately formatted PDF/A-1a documents. The project involves creating a system that formats the PDF/A-1a in a structured manner with clear sections. Please include relevant examples from your past work in your application.

...goal is to track app installs and sales generated from advertisements on Facebook, Instagram, Twitter, and TikTok. Requirements: Proven experience with Meta SDK (App Events and Conversions API). Familiarity with Twitter Conversion Tracking SDK. Experience with TikTok Events API or TikTok Pixel integration for mobile apps. Strong knowledge of Java and React Native development. Experience with tracking and analytics setup for Android apps. Ability to test and ensure accurate tracking of events like app installs and in-app purchases. Deliverables: Full integration of Meta SDK, Twitter Conversion Tracking SDK, and TikTok Events API. Documentation on implemented tracking events. Testing and verification of tracking accuracy ...

...Visitors can gain new followers thanks to this direct visibility. **Technology and Tools for Implementation** **Tech Stack:** 1. **Frontend:** - Recommended frameworks: React.js or Vue.js (for an interactive and responsive design). - Design inspired by Linktree, with modular components. 2. **Backend:** - Link and redirect management: Node.js or Python (Flask/Django). - Cloud hosting (AWS, Firebase, or others). 3. **Database:** - MongoDB or Firebase to store user information (profiles, networks). 4. **Basic Statistics:** - Measure clicks on each redirect button (via a tool like Google Analytics or an integrated solution). **Benefits for Users** - **Ease of Use:** No account creation, everything is smooth and fast. - **Immediate Visibility:** Visitors to the ...

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I have stock market candle data stored in a MySQL database, including open, high, low, close, volume, and time. I need a PHP script that generates order blocks after breakouts and breakdowns, and stores this data in the database. Key Requirements: - The script needs to identify whether the stock is reaching an order block after a breakout or breakdown, with volume is shrinking or not. - The analysis should be based on technical analysis principles. - Data should be updated in the database automatically, in real-time. - I will run this script after every candle close to analyze. Ideal Skills and Experience: - Proficiency in PHP and MySQL. - Strong understanding of technical analysis and stock market dynamics. - Experience with real-time data processing.

Hay un sistema que dejo de funcionar porque se movio a otro servidor. Funciona el 80% pero hay un error que no puedo identificar.

... --- #### 4. Proposed Technologies 1. **Frontend**: - HTML5, CSS3, and JavaScript. - Frameworks like React or Vue.js to enhance the user experience. 2. **Backend**: - Node.js with Express or Django (Python). - RESTful API for frontend and backend interconnection. 3. **Database**: - MySQL, PostgreSQL, or MongoDB (depending on needs). 4. **Hosting**: - Amazon Web Services (AWS), Google Cloud, or services like Vercel for frontend. 5. **Payment Platforms**: - Integration with Stripe, PayPal, or similar platforms. --- #### 5. Interface Customization 1. **Visual Design**: - Use of corporate colors and company logo. - Smooth animations for transitions between sections. 2. **User Experience (UX)**: - Intuitive navigation with clear menus. - Opt...

...7. Social Sharing: • Generate shareable summaries of activity and achievements. • Optional integration with social platforms (e.g., Instagram, Facebook). 8. Data Export: • Export health and activity data in formats like CSV and PDF. 9. Future AI Integration: • Enable personalized insights using AI for health improvement and activity optimization. Technical Requirements • Use the SDK provided by the smart ring manufacturer, which supports Flutter and both iOS and Android platforms. • Ensure secure storage and handling of health data, adhering to GDPR standards. • Provide real-time data syncing from the ring to the app, with efficient battery usage. Design Expectations • Clean, modern, and intuitive UI/UX design. &...

Looking to get a php api that takes a postcode. goes too my database and brings back customer details for that post code. A similar api is written like this so most of code can be copied. Simple project and i need this done today public function geteircode(){ if(isset($_POST['eircode']) && !empty($_POST['eircode'])){ $code = strtr($_POST['eircode'],[' '=>'']); $ir_identifiser = array("A41","A42","A45","A63","A67","A75","A81","A82","A83","A84","A85","A86","A91","A92","A94","A96","A98","C15","D01","D02",...

I'm seeking a proficient web developer to create and deploy a full-stack web application on AWS. The application should have both front-end and back-end components. Aim: Develop and Deploy a Scalable Web Application with Monitoring and Automation Description: In this assignment, you will develop and deploy a scalable web application on AWS, incorporating comprehensive monitoring and automation features. The tasks include setting up essential AWS services, configuring security and monitoring, and implementing DevOps practices for continuous integration and deployment. Requirements a VPC with at least two subnets Elastic BeanStalk and deploy a sample e-commerce site 2.a Create deployment slots for staging and productions 2.b Configure autoscaling rule b...

...- Unit test coverage >80% - Integration tests for critical paths - UI/UX testing - Performance testing ### Documentation - Code documentation - API documentation - Architecture documentation - Deployment documentation ### Development Practices - Agile methodology - Daily stand-ups - Sprint planning - Code reviews ## Tools & Environment ### Development Tools - Android Studio/VS Code - Flutter SDK - Firebase CLI - Git ### Testing Tools - Flutter test framework - Firebase emulator - Performance monitoring tools - Debug tools ### Deployment Tools - Firebase Console - Google Play Console - App Store Connect - CI/CD tools ## Timeline Expectations ### Phase 1 (2 months) - Project setup - Basic authentication - Core property management - Basic UI implementation ### Phase ...

I need an advanced PHP script that displays updated content in real-time on basic HTML without having to reload/refresh the site. Those data is mostly in JSON format from .log-files. -no fixed intervals (update when there are new logs) -no leaking endpoint -web server should not log when the content is updating

I'm looking for an experienced PHP developer to install a PHP script on my shared hosting server. The installation does not require any modifications to the script, so the ideal freelancer would be someone who can handle the installation process smoothly and efficiently. Key Requirements: - Proven experience with PHP - Familiarity with shared hosting environments - Ability to install scripts without modifications Please note that the exact directory for the installation hasn't been decided yet, so some flexibility is appreciated.

I'm seeking a skilled developer to make modifications to my SaaS School Management System. The primary tasks involve: - Implementing both percentage-based and fixed amount disco...seeking a skilled developer to make modifications to my SaaS School Management System. The primary tasks involve: - Implementing both percentage-based and fixed amount discounts in already existing functionality , which should only be applicable by school administrators. - Making changes in installement fee module like making it flexible. Ideal candidates should have a strong understanding of PHP, Laravel , SaaS platforms and school management systems, with proven experience in implementing discount systems and flexible payment modules. Please provide examples of similar projects you have successf...

I'm seeking a skilled developer proficient in the Solana Unity SDK to incorporate Solana blockchain features into my project. The main focus is on NFT minting and establishing a marketplace. Key tasks include: - Implementing the functionalities for listing and selling NFTs - Integrating a secure and user-friendly wallet system The platform will be centered around minting and trading digital collectibles. Hence, an understanding of digital assets and collectibles is crucial. Ideal candidates should have: - Extensive experience with the Solana Unity SDK - Prior work in developing NFT marketplaces - Proficiency in implementing wallet integrations - Understanding of digital collectibles and their minting process. I'm looking for a developer who can deliver a seaml...

... Skills & Experience Required: - Proven experience with Java Spring Boot core, AOP, web flux, Security, - Strong understanding of user authentication and authorization. - Proficient in API integration and development - Ability to work within EST time zone(Must 8 pm IST to 2:30AM) - Expertise in reactive Java programming using webflux and other concepts. - Experience with documentDb. - Hands-on AWS services, Jule(CICD),maven dependency handling. - Writing Junit for newly implemented code. - Must be writing the code using Java reactive programming using Mono, flux etc - Must have to work remotely wia VDI in the client environment, with No code base or anything shared in locally. The candidate must be from the India region and have a Maximum fixed cost of 55k pm. We prefer so...

Node.js and Developer with AES 256 Encryption & MongoDB Exp...services. Experience working with MongoDB and writing efficient queries. Familiarity with third-party APIs for email/SMS OTP services (e.g., Twilio, SendGrid). Ability to write secure, scalable, and optimized code. Good communication skills and a proactive approach to problem-solving. Preferred Skills (Optional): Experience with Docker or other containerization tools. Knowledge of cloud platforms like AWS, Azure, or Google Cloud. Contract Details: Duration: [20-30 Days]. Budget: [Mention your budget, e.g., ₹15000 - ₹25000]. Location: [Remote]. How to Apply: Interested candidates can apply with: A brief introduction. Relevant project experience. A link to their GitHub profile (if available). Expected compensation.

...verification process. After verifying the domain, I want to activate SES. This includes instructions on how to navigate the AWS Management Console and set up the SES service. It should also explain how to move SES from the Sandbox environment to Production mode so that emails can be sent to recipients without restrictions. If requesting production access is required, I need a detailed guide on how to submit the request and what information is typically needed for approval. Once the domain is verified and SES is activated, I need to learn how to send a test email. This should include creating the necessary SMTP credentials, configuring an email client, or using the AWS SDK/CLI to send an email, and testing the entire process to ensure that the email is sent and rec...

I need an experienced system administrator to help me install a self-signed SSL certificate on my Ubuntu server running Apache. Skills Required: - Proficiency in AWS Ubuntu Linux - Expertise in Apache web server configuration - Experience in SSL installation, particularly self-signed certificates ( we need to install free ssl) The task involves configuring the server to use the SSL certificate, ensuring secure connections are properly handled, and testing the configuration for functionality and security. Please provide evidence of similar work if possible.

...information in a collapsible section. 1.5 Sub-Contractor Validation and Insurance Document Verification: Enable document uploads to AWS S3 or Firebase Storage and automate verification processes. Document Expiry Alerts: Implement server-side functions for renewal notifications. 2. Sub-Contractor Features 2.1 Payments to Sub-Contractors Payment Integration: Use Stripe or PayPal for secure payment processing. Flexible Payout Options: Offer various payout frequencies and display transaction history using tables with filters. Incentive & Bonus System: Calculate bonuses based on customer ratings and peak time jobs. 2.2 Tracking & Directions In-App Navigation: Utilize Google Maps SDK for optimized turn-by-turn navigation. ETA Adjustments: Use Google Directions API...

I need a Pure PHP expert to help me resolve an API issue. Specifically, I'm encountering warnings in my PHP script: - Object of class mysqli could not be converted to float - Object of class mysqli could not be converted to int Both of these warnings are originating from line 494 of the autoreply_functions2.php file in my API.

I'm seeking an expert in JavaScript and Node.js to enhance my AWS Lambda and DynamoDB-based application. The primary focus will be on adding API integrations to the existing codebase. Ideal Skills: - Proficiency in JavaScript and Node.js - Strong experience with AWS services, particularly Lambda and DynamoDB - Prior experience with API integrations - Good debugging and code optimization skills

AWS online app support and maintenance, knowledge in JavaScript and Node.js , AWS lambda and Dynamo DB

I'm seeking an expert to convert my current web app into a locally hosted Angular app. This project also involves creating custom-built connectors for orchestration software that links the local app to AWS. Key Requirements: - Development of a local version of the web app with full data synchronization capabilities with AWS. - Implementing automated backups and error logging features in the orchestration software. - Creating custom-built connectors for AWS interaction. Ideal Skills: - Proven experience with Angular and web app development. - Strong background in AWS and creating custom connectors. - Proficient in implementing data synchronization, automated backups, and error logging. - Knowledge in user authentication, data visualization, and file uploa...

I'm seeking a freelancer who can set up a robust blockchain system for product traceability and creating a Digital Product Passport (DPP). Main Requirement:- If you could develop the below in 3-4 days, please update A website for CRUD application over Digital Product Passport using Blockchain for a Varanasi Silk Saree Textile supply chain --- you may use AWS VM or as per your best suitable option

I'm urgently seeking an expert raw PHP developer for a 2-months project. The developer is required to work on upgrades to our existing reporting panel at our Nikaton, Dhaka, Bangladesh office. Freelancer have to work in our physical office . It's not a remote job. MS-SQL database expertise is required. The office hours are from 9 A.M. to 6 P.M., and lunch is complimentary. The project involves: - Implementing new features. - Bug fixing. - Performance optimization. The new features to be added include: - Customizable reports. The level of customization for the reports includes: - User-defined filters - Customizable layouts - Export options (PDF, Excel) Ideal candidates should have: - Extensive experience in raw PHP - Proven track record in developing reporting pa...

Project Description for Freelancer.com: JizzyAI - AI-Powered Content & Pinterest Marketing Platform Overview: Developing an AI-based platform for automating content creation and Pinterest marketing. Platform integrates multiple AI models and ...Pinterest Tools Pin generator Keyword research & tracking Analytics dashboard Content performance monitoring Bulk pin data export Core Requirements AI APIs integration (Image models) Pinterest API integration WordPress API connectivity User authentication File management Data analytics Cloud deployment Technical Stack Required: Frontend: React/ Backend: Node.js Database: PostgreSQL Cloud: AWS/GCP APIs: AI models, Pinterest, WordPress Deliverables: Source code Technical documentation Deployment guide API documentation Trainin...

...existing LMS platforms. 4. Customizable dashboards with advanced analytics for all user roles. 5. Integration with biometric systems for attendance tracking. 6. Multi-school administration with consolidated reporting. ________________________________________ Technology Stack: Frontend: 1. React.js Backend: 1. NestJS (Node.js Framework) 2. Python (for AI/ML modules) Database: 1. PostgreSQL Hosting: 1. AWS (Amazon Web Services) Payment Gateways: 1. Paypal SMS Gateway: 1. Twilio ________________________________________ Development Roadmap: Phase 1: MVP Development: 1. Define system architecture and database normalization. 2. Develop core features: user management, role-based access, and student/staff management. 3. Implement multi-school administration and basic reporting. 4. Deploy...

...reviews and mentor junior developers (as applicable). Maintain thorough documentation for systems, APIs, and workflows. Requirements: Technical Skills: Languages: C#, JavaScript/TypeScript, HTML5, CSS3. Frameworks: .NET Core/ASP.NET Core, Blazor, React, or Angular. Databases: SQL Server, SQLite, MySQL, or NoSQL (e.g., MongoDB). Tools: Visual Studio, Visual Studio Code, Git, Azure DevOps. Cloud: Azure, AWS, or GCP services. Other: Knowledge of WebSockets, cryptography, and secure development practices is advantageous. Soft Skills: Excellent problem-solving and analytical skills. Strong communication and ability to work independently or collaboratively. Adaptable to changing requirements and priorities. Experience: Full-Time Role: 3+ years of experience in .NET full-stack developme...

I'm looking for a knowledgeable professional with a passion for learning about open-source and proprietary Large ...knowledgeable professional with a passion for learning about open-source and proprietary Large Language Models (LLMs) such as OpenAI, Anthropic, Bedrock, etc. The ideal candidate will have the ability to design a robust cloud-based solution architecture on AWS right from the start. Key Responsibilities: - Designing solution architectures using various LLMs - Utilizing AWS for a cloud-based infrastructure - Delivering high-quality, efficient designs quickly Ideal Skills and Experience: - Extensive knowledge of LLMs - Proficiency in AWS - Experience in designing cloud-based solutions - Strong problem-solving skills - Passion for learning and staying ...

Development of a Cost-Efficient Microservice for Color-Based Apparel Search and Price Comparison Project Overview: We are developing a Minimum Viable Product (MVP) website focused on fashion, st...backend development and API integrations. Familiarity with scraping technologies and tools (if necessary). Knowledge of color recognition and matching algorithms. Proficiency in working with e-commerce APIs. To keep costs low and the solution scalable, the microservice should utilize: Backend: Python (preferred), Node.js, or PHP. Data Handling: JSON-based processing, with minimal storage requirements. Deployment: Use free or low-cost cloud platforms like Heroku, AWS Free Tier, or Render. API Integration: REST-based architecture for simplicity. Understanding of scalable microservi...

Fix Variable Not Found Error in Migrated Yii Framework Website (PHP 7.0) Project Description: I require assistance fixing a critical issue with a website built using the framework on PHP 7.0. The website was recently migrated from cPanel to DirectAdmin, and since then, we've encountered an error message indicating a variable named $where is not found. Error Details: Error Message: PHP Notice – yiibaseErrorException: Undefined variable: where Code Snippet:: PHP $connection = Yii::$app->getDb(); $command = $connection->createCommand("SELECT id FROM product $where"); $result = $command->queryAll(); Potential Causes: Missing Variable Definition: The $where variable might not be properly defined or assigned a value before...

We we forced to udpate our server form centos7 to alvaviva that has a more recent version of mysql, now one main pure php file we have are throwing some errors. We need someone to update it. No logic changes needed just syntax and maybe some database access query.

Project Description: We are looking for an experienced Full Stack Developer to make adjustments to the automated email system of our e-learning platform, built with PHP/Laravel and hosted on a dedicated AWS server. Key Objectives: Fix any bugs and enhance the functionality of automated email delivery. Optimize email templates (both design and content) to improve user experience. Ensure proper configuration of the email delivery system (e.g., via SMTP, SES, or other AWS-compatible services). Requirements: Strong experience in Full Stack development with PHP and Laravel. Proficiency in managing and configuring dedicated servers on AWS. Expertise in setting up email systems (SMTP, SES, etc.). Knowledge of best practices to improve email deliverability. Str...

I'm seeking an experienced data engineer with extensive knowledge in Python, AWS S3, Step Function, Docker, Athena, EC2, and PyCharm. Key Responsibilities: - Assist with configurations and debugging on AWS, Docker and PyCharm. - Help optimize code in PyCharm for better performance. - Troubleshoot and resolve issues related to Docker, including configuration and deployment. The ideal freelancer will have a strong background in data engineering and practical experience with the mentioned platforms and tools. Python proficiency is a must, along with the ability to work independently and solve problems efficiently.

...secure, and cost-effective web interface for managing phone call recordings stored in my Amazon S3 account. Key Features: - Basic Password Protection: The interface needs to be secured with basic password access to ensure data privacy. - User Friendly Calendar Navigation: Users should be able to easily navigate and view recordings grouped by date using a calendar to choose specific days and arrow buttons to go between days. - Easy Access to Recordings: Each day’s recordings should be listed, with direct links to play or download the files. Cost Efficiency: The solution should avoid or minimize ongoing expenses while leveraging S3 as the primary storage. Ideal Skills: - Proven experience with AWS S3 and web development - Strong understanding of securi...

I'm looking for a skilled PHP developer to implement a new feature in my system that generates sales reports in PDF format. The reports should include total sales, individual item sales, and sales by predefined periods like last week or last month.

We are seeking an experienced PHP CodeIgniter developer to integrate Azure OpenAI into our existing platform. The goal is to automate question generation based on specific educational parameters like Bloom's Taxonomy, Course Outcomes (CO), and Program Outcomes (PO) and generate question papers in PDF or Word format. Project Scope: Integrate Azure OpenAI API into our PHP CodeIgniter application using the OpenAI PHP Client. Develop an AI-driven question generation system based on: Bloom’s Taxonomy (Remember, Understand, Apply, Analyze, Evaluate, Create). CO and PO Mapping for structured assessment design. Enable customizable question generation based on: Subject/topic selection Difficulty level (Easy, Medium, Hard) Question types (MCQs, Short, Long, Case-base...

I upgraded my server at hostgator from centos7 to almaviva. The upgrade was done by hostgator teadm, but some websites have stoped to work and they say is that there extra modules or extensions that needs to be installed. I need help for that, using whm cpanel. My old server is still available so its possible to compare previous configuration with current one.

I need a freelancer to integrate GPay UPI for one-time payments on my PHP CodeIgniter website. The integration should not save any user payment information as I prefer to keep transactions strictly one-off. Key Requirements: - Integration of GPay UPI for one-time payments - No saving of user payment information - Implementation of email notifications for successful payments - On-screen confirmations for payment success Skills Needed: - PHP CodeIgniter - Payment Gateway Integration - Email Notification System Implementation - UI/UX for On-screen Confirmations Please note, I want a simple, clean and efficient integration that prioritizes user experience and seamless transaction process.

I am looking for a nodejs developer here are the requirements: -Expert in creating APIs in Nodejs (At least 5 years as a Nodejs developer). -Implementation of CI/CD pipelines. -Solid knowledge of implementing and optimizing solutions on AWS. -Knowledge of microservices architectures. -Solid knowledge of Stripe integration. -Deep understanding of database creation in PostgreSQL. -Deep knowledge in backend API creation for chat in web system and mobile APP. -Developer needs to have the ability to quickly create complex solutions, deploy them on AWS, and contribute to the team whenever requested. -AI systems integration. -You need to know how to apply SOLID principles. -Understanding of how creating entity-relationship diagram. You can use some tool recommended for that. I ne...

...Bachelor’s degree in Computer Science, Information Technology, or a related field. - **Experience:** - 2+ years of hands-on experience with Angular. - Familiarity with front-end frameworks and libraries like Bootstrap or Tailwind CSS. - Experience with back-end technologies like ASP.NET, Node.js, or Python is a plus. - **Additional Skills:** - Experience with cloud platforms like Azure or AWS. - Knowledge of Docker, Kubernetes, or microservices architecture is advantageous. --- ### **Career Path** Angular Developers can grow into roles such as: - **Senior Front-end Developer** - **Full-stack Developer** - **UI/UX Engineer** - **Technical Lead** - **Front-end Architect** This job profile is designed to help organizations attract top Angular talent and prov...

Παρακαλούμε Κάνε Εγγραφή ή Κάνε Είσοδο για να δεις λεπτομέρειες.

I'm looking for a skilled PHP developer with Android expertise who can integrate a specific formula for calculating pathology test result value based on another test value into my existing custom-built system. This project involves both a PHP portal and an Android mobile app. Key Requirements: - PHP development for the portal - Android app development - Integration with a custom-built system - Understanding of mobile app development principles - Experience with backend system integration