Mobile programming php jobs

...professional feel and design. This will be built into our current theme. We want to professionalize this page to be more like other popular dating websites. Please Note: This is an urgent project, so we will need this to be completed within 7 to 10 days max. Key Requirements: - Simplification of the checkout process to make it more user-friendly - Implementation of a mobile-friendly design as a significant portion of our users shop via mobile - Enhancement of the visual aesthetics of the page to attract and retain users The ideal candidate should have a keen eye for design, a deep understanding of user experience principles and proven experience with e-commerce websites. Please note, there are elements from the current payment page that we want to retain: - The layout...

I'm in need of a professional mobile app developer who can help me create an APK for a cross-platform mobile application. The app needs to support both Android and iOS platforms. Ideal Skills and Experience: - Extensive experience in mobile app development, specifically for both Android and iOS - Proficiency in creating APKs - Familiarity with popular cross-platform development tools - Strong programming skills, particularly in Java, Swift, or Dart - Previous experience developing utility/tool or e-commerce apps is a plus. I look forward to your bids and hope to work with a professional who can deliver a high-quality app.

We are looking for an experienced WordPress developer to build a website for selling virtu...numbers directly from the website. Configure Twilio's SMS API for OTP delivery. WooCommerce Setup: Implement WooCommerce for e-commerce functionality. Configure payment gateways (Stripe/PayPal) for seamless transactions. User Features: User registration/login system. Dashboard for users to view purchased numbers and OTP history (if needed). Secure, responsive design optimized for desktop and mobile. Admin Features: Admin panel to manage virtual numbers, pricing, and user data. Reporting and analytics dashboard for sales and SMS usage. Testing and Deployment: Ensure the website is fully functional with no bugs. Test SMS/OTP functionality for multiple scenarios. Deploy the website on ...

I'm seeking a talented writer with a deep understanding of programming and software development, specifically in Laravel, to craft a 2000-word article focused on Advanced Laravel techniques. This piece should be tailored for an audience of advanced developers. Please share your proposal showcasing your expertise in writing articles related to software development & programming

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.

...community. Collaborate with the team to highlight special promotions, bulk orders, and delivery services. Track performance metrics (likes, shares, followers, engagement) and suggest strategies for growth. Requirements: Experience managing Instagram pages or creating content (personal or professional). Creative mindset with strong photo/video editing skills (using tools like Canva, Photoshop, or mobile apps). Knowledge of Instagram trends, hashtags, and algorithms. Excellent communication and writing skills to craft captions and respond to customers. Passion for food, especially Rajasthani cuisine, is a plus! Location: This is a remote, part-time role, but applicants from Dombivli or nearby areas are preferred for easier communication and coordination. Compensation: Pay will be...

I'm in need of a Python developer to improve my Whisper script. The project involves: - Upgrading the current script to include better UI elements using PyQt - Implementing some new file processing functions The UI should be com...Whisper script. The project involves: - Upgrading the current script to include better UI elements using PyQt - Implementing some new file processing functions The UI should be compatible with a desktop application. Ideal skills for this project include: - Proficiency in Python, with a focus on desktop application development - Extensive experience with PyQt - Strong skills in file processing programming - Previous experience enhancing scripts for improved functionality and user interface Please provide examples of similar projects you've co...

I'm looking for an experienced Android programmer with a backg...being set manually in the application settings. 2. Command Execution: The assistant should be able to execute all commands supported by the car. I have a comprehensive list of these commands. 3. Wake Word Functionality: The system should be able to recognize voice commands from start-up, activated by a designated wake word such as "Hi BYD". Ideal candidates will have: - Proficiency in Android programming - Experience in developing speech recognition applications - Familiarity with BYD's DLink car systems - Ability to replicate and enhance existing software - Skills in creating intuitive user interfaces - Experience in bilingual software development Note: The existing English version is using VOSK ...

'm seeking a skilled mobile app developer to create two MVP social media mobile applications. The first app is a travel-focused social networking platform, while the second is a bar and party-oriented social networking app. Both apps should be compatible with both iOS and Android. Key Features: - Travel App: This app needs to facilitate travel social networking. Users should be able to connect with fellow travellers, share experiences, and plan itineraries together as well as record videos and take pictures to post of trip. - Bar/Party App: This app's primary function is to serve as a social networking platform for party-goers. Features could include finding friends, meeting new people, and sharing party experiences. Users can post videos and pictures of their nig...

I need a tool that can clean my computer from junk files and cookies, cache, etc Desired Programming Language: C# (preferred) * Do not bid if you have under 3 reviews, you will be ignored * Need Source Code when Job is Complete, After any Bug fixes, and Updates * Milestone release upon completion of project & is bug free. * Please post "I've read everything" when applying, so I'll know you actually read this and give you priority response. * I'm looking for best deal possible.

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...

I need an expert in Python and server management to rehost my existing API-based Python website on a VPS server. Key Responsibilities: - Rehost the website on a Linux-based VPS server - Ensure all APIs are functioning correctly post-migration - Optimize server settings for best performance Ideal Skills: - Strong Python programming skills - Extensive experience with VPS server management - Familiarity with API-based applications - Problem-solving skills to troubleshoot any issues that arise during rehosting Please note, the details about the VPS server and the code repository have not been finalized yet. Flexibility and readiness to assist with these aspects would be advantageous.

I'm seeking a proficient mobile app developer specializing in crafting applications for both iOS and Android. The app is intended for a 3D printing platform, which means prior experience in developing similar applications will be a significant advantage. The project requires a professional who can assist in designing the app from scratch. The ideal candidate should possess a strong understanding of UX/UI design principles and be able to create an intuitive and user-friendly interface. Key Skills and Experience: - Proven track record in mobile app development for both iOS and Android. - Experience with 3D model viewer apps will be a plus. - Strong UX/UI design skills and experience. - Proficient in user account management systems. - Excellent communication and collabora...

We are seeking a skilled *Flutter Developer* to develop our mobile application from scratch. The project is backed by a robust *Laravel* backend, and we are looking for a professional to build the mobile app based on our provided designs and requirements. ### *Responsibilities:* - Develop the mobile application using *Flutter*, based on detailed designs provided in a Figma file. - Create and integrate custom *API endpoints* to communicate between the Flutter app and the Laravel backend. - Ensure smooth and efficient interaction between the mobile app and the backend. - Debug and optimize the code to ensure performance and scalability. - Provide regular updates on the progress and collaborate effectively with the team. ### *Requirements:* - Proven experience in...

...failures with refresh capability Log videos without CC to Implement robust error handling for large-scale processing Design for resilience against YouTube UI updates Project Parameters: Budget: $50 Timeline: 1-2 days Deliverable: Fully functional Python application Required Skills: Python programming Experience with web scraping Knowledge of YouTube API or similar video platform integration Error handling and logging implementation Data extraction and file management Desired Programming Language: Python C# (preferred) Or whatever is best for this type of work * Do not bid if you have under 3 reviews, you will be ignored * Need Source Code when Job is Complete, After any Bug fixes, and Updates * Milestone release upon completion of project & is bug free. * Please po...

I'm seeking a skilled programmer to develop a comprehensive mobile application for both iOS and Android platforms. This app, aimed at international students in Dubai, will be a guide encompassing various aspects of student life and beyond. Key Features: - Campus/Rental Accommodation: The app should provide information on housing options both on and off campus. - Events and Parties: A calendar or listing of social events for students. - Clubs and Bars Booking - Cleaning Services: Information or links to local cleaning services. - Job Board: A section dedicated to part-time job opportunities, volunteering , or internships available for students. - University Assistance - Societies: Information on various student societies and how to join them. - Marketplace among students - Bon...

I'm looking for an expert in Arduino programming and embedded systems to update my existing Arduino code. The code needs to function based on a DS3231 RTC in two different scenarios: 1. Day/Night Temperature Regulation: The Arduino will determine whether it's day or night using data from the DS3231. During the day, it will maintain current temperature values. At night, it will switch to using predefined lower values. 2. LCD Display Management: The code should also handle an LCD display that shows the current time, the day/night scenario, temperature, and fan speed details. Skills and Experience Required: - Proficient in Arduino programming - Experience with DS3231 RTC - Familiarity with LCD screens - Knowledge of DHT11/DHT22 temperature sensors - Ability to modif...

I am developing a product that allows users to input a website URL and transform it into Android or iOS apps. I am seeking a developer who can write code in any programming language to take a URL as input and generate an Android app.

I'm looking for an expert developer familiar with AI integration to create a web and mobile app. This app will leverage AI to generate dish recommendations based on the ingredients the user has available. The user will upload a photo of their ingredients, which the AI will then use to suggest meals. Key Features: - AI-driven dish generation - User-friendly photo upload interface - Ingredient-based recommendations Ideal skills for this project include: - Web and mobile app development - AI integration specifically for dish generation - Creating intuitive user interfaces - Experience with image recognition technology

More details: It would need to be in tealscript It would assign points to users for participation. What type of app are you looking to build? Mobile app Which platform do you want the mobile app to be developed for? Both What is the main purpose of the mobile app? Take surveys, allow people to post experiences, sign petitions

I am looking for a macro developer for PC that can help me automate the process of "opening" gifts in Hypixel Skyblock in Minecraft. Ideal Skills: - Experience with creating macros for PC games - Extensive understanding of Minecraft gameplay and mechanics, particularly Hypixel Skyblock - Proficiency in programming languages suitable for macro development - Knowledge of PC gaming hardware and software The macro needs to be efficient and unobtrusive, allowing for smooth gameplay without drawing attention.

...• Use pymavlink, MAVSDK, or ROS for custom scripting and real-time control adjustments. Required Expertise: 1. ROV Control Systems: • Proficiency in developing control algorithms for stabilization (pitch, yaw, roll). • Experience with PID tuning for underwater robotics. 2. ArduSub Firmware Development: • Strong understanding of ArduSub, MAVLink, and Blue Robotics hardware. 3. Programming and Algorithm Design: • Proficiency in Python and C++ for control systems and dynamic parameter adjustments. 4. Simulation and Testing: • Experience with underwater robotics simulators (e.g., Gazebo or SITL) for testing and validation. 5. Hardware Integration: • Familiarity with joystick controllers and peripheral integration using Raspb...

... With an improved architecture and advanced features, QSM 2.0 delivers faster performance, seamless integrations, and enhanced user experiences. ________________________________________ Key Objectives: 1. Provide a scalable, multi-tenanted school management system. 2. Ensure high performance and faster data processing (e.g., results generation). 3. Enhance user experience with an intuitive and mobile-friendly interface. 4. Integrate AI tools to offer predictive analytics and a virtual assistant. 5. Enable seamless integration with third-party tools for payments, LMS, and more. 6. Build an API-driven platform to enhance ease of integrations. 7. Ensure the objectives include compliance with data protection laws (e.g., GDPR) ________________________________________ Features: Core Fe...

I'm in need of a Python developer who can create a script for me. The script should be capable of extracting goals from ChatGPT's output and organizing them into a JSON file. Goals should be categorized by their dates. Key Requirements: - Proficient in Python programming - Experience with data extraction and JSON formatting - Ability to write efficient, clean, and well-documented code The script needs to be able to identify and extract any goal recommendation based on following duration: - Week - Month - Year Please provide examples of similar projects you've completed.

Job Description: We are seeking an experienced freelance developer ...user-friendly Telegram notifications. • Real-Time Data Processing: • Expertise in handling real-time data streams or using webhooks to enable immediate alerts. • Programming Skills: • Proficiency in languages such as Python or Node.js, suitable for building bots and processing data in real-time. • Crypto Knowledge (Preferred): • Familiarity with crypto trends, particularly memecoins, including typical hashtags, terminology, and launch patterns, to enhance detection accuracy. Skills Required: • Social media bot development • X API or web scraping experience • Telegram bot integration • Real-time data processing • Programming (Python, Node.js,...

Senior Software Engineer Consultant (Remote) Hourly Rate: $30–$50 Skills: • Expertise in web programming languages and frameworks (e.g., ASP.NET or Spring Boot). • Fluent English, with strong verbal and written communication skills. About Us: Anadea is a web and mobile app development company specializing in high-quality, tailored solutions. We’re currently collaborating with U.S.-based clients on a project that requires expert technical consultation and effective communication. Job Overview: We’re seeking a Senior Software Engineer Consultant to assist with solving complex web programming challenges and facilitating discussions with our U.S. clients. This role is project-based, and the ideal candidate will provide both technical exper...

## Facebook Engagemen...for data collection - Database choice is flexible (SQL or NoSQL) - Method of data transmission and storage is open to your expertise ### Deliverables: 1. Functional engagement tracking system 2. Database setup for data storage 3. Leaderboard generation system 4. Basic user interface for viewing results 5. Documentation on system usage and maintenance ### Additional Notes: - The specific programming language and technologies used are up to you - Ensure compliance with Facebook's terms of service and data privacy regulations - Provide a timeline estimate for project completion If you're interested in this project, please submit a proposal including your approach, estimated timeline, and any questions you may have. Previous experience with similar...

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...

I'm looking for a skilled developer to create a SketchUp plugin that automates my workflow, specifically focusing on generating material reports. Key Requirements: - Expertise in SketchUp plugin development - Prior experience with workflow automation solutions - Ability to implement report generation functionality Ideal Skills: - Proficient in Ruby (SketchUp's programming language) - Strong understanding of material reporting within SketchUp - Experience in software development and automation tools Please provide examples of similar projects you've completed in the past.

Are you one step away from data loss? Only 33% of users back up their data regularly. Rebu...solves their problem - Include Product for Business Packages - FAQ’s for business Personal Backup: - Highlight relevant features - How it solves their problems - Include Product for Personal Packages - FAQ’s for persona Required Skills: UI / UX Marketing copywriting WHMCS Bonus: HTML, PHP, CSS, Smarty Graphic Design Target Markets: #1: Business owners or employees in IT departments looking to avoid losing critical business data #2: Family-conscious individuals who also want to backup photos on mobile devices If you do well and have the skills for landing page design in OnePage love style, we will invite you to help with phase 2 and make niche market landing pages b...

I'm looking for an experienced app developer to create an iOS and Android app that allows users to generate PDF reports based on their inputs. Features: - The app should collect user inputs through text entries, file uploads, and form submissions. - The PDF reports should be generated using predefined templates. Ideal Skills: - Proficiency in iOS and Android app development. - Experience in creating apps that generate PDF reports. - Prior work with predefined templates for report generation. Please provide examples of similar projects you've completed.

I'm seeking a developer (or team) to create a meaningful and innovative mobile platform that connects loved ones while supporting mental health through engaging and interactive gaming experiences. Key Features: - The main aim is to create a platform that brings people together. This could be family members, friends, or even acquaintances, fostering connections and reducing feelings of loneliness - all whilst improving mental health in vulnerable groups. - The platform (in its first phase) will target the ageing population, providing mental health support tailored to their specific needs, and using the support of their loved ones to encourage them playing. The app will thus feature tailored, multiplayer games catered to improving and enhancing ageing individual’s mental ...

...Admin-level analytics to track user engagement, test completion, and revenue metrics. Payment Integration: Integration of payment gateways (e.g., PayPal, Stripe) for subscription-based access or pay-per-test models. Content Management: Easy admin interface to upload new test prep materials, questions, and resources. Capability to add multimedia (images, videos) to questions and explanations. Mobile and Desktop Compatibility: Fully responsive design for optimal performance on desktops, tablets, and smartphones. Gamification Elements (Optional): Badges, leaderboards, and achievement tracking to engage users. Project Requirements: The platform must be scalable to accommodate a growing user base and content library. Ensure high performance, security, and GDPR-compliant data hand...

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.

I'm looking for a proficient Flutter developer who can edit a mobile app for both iOS and Android. Key Requirements: - Expertise in Flutter framework - Extensive experience in cross-platform mobile app development - We bought flutter app code in envato and we need a developer to change some codes in the app and submit the app in Apple store and Google play store

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. Strong troubleshooting a...

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.

I'm looking for a professional to build a mobile website and an Android app for a straightforward matrimony platform. Core Features: - User profiles: Users should be able to create and manage their own profiles. - Payment Access: There should be a payment gateway to give users access to view profiles. I am open to discussing further details over a call. User Verification: - Phone verification - Government ID upload - WhatsApp: Users should have the option to verify their profiles through WhatsApp Ideal Skills: - Mobile app development (Android) - Website development - Knowledge of payment gateway integration - Experience with user verification systems Please note, the simpler the design, the better. I appreciate minimalistic, user-friendly interfaces.

...developer must be Arabian only who can assist with the design, content creation, and development of my IT company's website. The site has been set up with a domain and three pages, but there are approximately 35 pages in total. Key Responsibilities: 1. Professional, modern content creation and design for the remaining pages, incorporating interactive JavaScript elements. 2. Ensure all pages are mobile-responsive and compatible with smart devices. 3. WPML (Arabic/English) content design and creation using the WPML Tools plugin. 4. Developer will be provided with general information for the pages, but content creation and design will be the responsibility of the developer. 5. Create an Arabic/English link for each page that supports search engines for individual page indexing...

I'm seeking a skilled web developer with experience in Wix to enhance my taxi service website. The primary task is to create a comprehensive taxi booking form that includes the following features: Essential Features: - Payment Integration: Secure and reliable payment gateway. - Email Confirmations: Au...exact price before confirmation. I have previously worked with software developers who have used WordPress to create a booking form, but it was not fully functional. I can provide the per mile and per distance pricing. It's crucial for this project that the booking form is implemented correctly on Wix, as I have encountered difficulties with other platforms. If you're a Wix expert with strong programming skills and a track record of developing similar projects, I wou...

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'm seeking a professional to evaluate the security of my home network. I am particularly concerned about: - Wi-Fi security - Smart home devices - Computers and mobile devices (specifically, laptops and desktops as well as smartphones and tablets) I have not implemented any advanced security measures thus far. My home has a variety of automation devices that I would like to be assessed for vulnerabilities. The ideal candidate for this project should have extensive experience in network security and cybersecurity, with a strong understanding of smart home technology. Please provide evidence of previous work in this field.

I need an engineer in the field of refrigeration and ice factories. He has extensive knowledge and experience in the operation of each part of the system and PLC programming for the ice factory system. Because we want to program the PLC to be compatible with the Bitzer compressor. We will attach an explanatory video for him to determine the fault and problems that we faced, including what is the reason for the refrigerant oil not returning

...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 need your nodejs developer do this test in three busines...

...will provide these). 4. CRM Integration • Sync all collected data (name, email, phone, and qualification results) into Pipedrive CRM. • Ensure data is logged under appropriate lead categories (e.g., “Qualified” and “Not Qualified”). 5. Appointment Scheduling • Integrate with Calendly (or a similar scheduling tool) to allow qualified leads to book a discovery call. 6. User Experience • Design a mobile-friendly, responsive chatbot that integrates seamlessly with our website. • Use a conversational tone to enhance user engagement. Additional Requirements Development Platform • Use a chatbot platform such as Dialogflow, ChatGPT API, or Landbot. • Ensure the platform can handle integrations with Pipedrive and Calendly. S...

I'm looking for a skilled professional who can help me collect data from my Arduino sensors and transfer it to a MySQL database. The data includes temperature, pressure and altitu...transfer it to a MySQL database. The data includes temperature, pressure and altitude readings. Key Project Details: - Data Collection: The sensors will be collecting data every second. So, efficiency is key. - Connection: The connection to the database will be through both Wi-Fi and wired Ethernet. Experience with both types of connections is necessary. Ideal Skills: - Proficient in Arduino programming - Strong knowledge of MySQL - Experience with sensor data collection - Familiar with Wi-Fi and wired Ethernet connections Please provide examples of similar projects you've completed in your ...

I'm looking for a skilled mobile app developer to create a daily expense tracking app specifically for Android. This app should help me track my daily expenses and ultimately help me understand how to earn back what I spend. Key Responsibilities: - Develop a user-friendly, intuitive Android mobile app - Implement functionalities including report generation Ideal Skills: - Strong experience in Android app development - Previous work with expense tracking apps is a plus - Good understanding of data visualization for report generation Please note, the app does not need to support expense categorization or budget alerts, but should be capable of generating comprehensive reports.

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