I'm in need of a skilled web designer to create an E-commerce website tailored for freight forwarding. Key requirements: - Your primary goal will be to design and develop a website that drives sales for a freight forwarding service. This will include aspects like advertising, tracking, and the actual e-commerce transactions. - The site is to be optimized for easy navigation, with a strong call-to-action, and a user-friendly interface. - Should be mobile-friendly. - Potential features: As I'm not yet sure about the need for product inventory management and order tracking, I'd prefer a designer who has experience incorporating these features and can advise me on their necessity for my specific project. - Additionally, expertise in SEO and digital marketing would be ...
I am seeking a skilled professional who can help me monitor a specific iPhone stealthily and in real-time. To be precise, I need the following aspects of the device to be constantly watched: - Call History - Text Messages - Social Media Activity - Web and App History A successful candidate will hold a vast understanding of iPhone technology, cybersecurity, and ethical hacking. Previous experience in similar projects and absolute discretion are of utmost importance. Please, remember this task should be executed without alerting the iPhone's primary user. Your expertise will gauge the level of anonymity maintained.
I'm looking for a skilled iOS and android developer to create an application aimed at adults and teenagers. Key features needed: - Tracking Services: The application should be able to provide real-time tracking services for various needs. Ideal Skills: - Experience with android and iOS platform application development - Knowledge of real-time tracking services integration - Familiarity with creating applications for adults and teenagers
I am looking for a talented developer to help me implement a comprehensive quiz management system for my personal project. Key requirements include: - Ability to manage multiple choice, true or false, and open-ended quizzes - Provide access to these quizzes through both a website and a mobile application - Incorporate user account management for both quiz administration and participation Skills and experience in the following areas are essential: - Full stack development - Proficiency in developing both web and mobile applications - Previous experience with managing and implementing complex systems with multiple user roles The successful candidate should be able to deliver a high quality, user-friendly system within a reasonable timeframe. 1. Quiz manager: Implement a quiz onl...
I'm in the process of launching a new business and I need an experienced ...It's crucial that our developer is familiar with integrating this into an e-commerce system. - International Shipping Support: The site should support worldwide shipping. It will be essential that the developer ensures that shipping quotes are accurate and that the system properly calculates shipping costs for each order. I'm looking for a developer with a solid track record in e-commerce web application development. Experience with system integrations, especially payment gateways, is a must. It would be a plus if the developer has previously worked on projects that involved international shipping. Please share your relevant experience and if possible, provide links to previous e-commerce p...
I need a small application prototype with the following features: Multi-Employer Job Portal/Admin app (Role Based access) User/applicant App (for Multiple applications to different employers) User Profile Document Upload (Save documents to Db and attachments to Blob Storage ) Send Emails to Employers and applicants back and forth 2 Apps in total ie. admin app and applicant app. job application requirements will be provided. Nodejs, angular, My SQL, ORM, Data Seeding, Migrations should be used.
I need an Angular expert who can assist me in creating an...that is displayed on the page Structure for page (minimum requirements): Page: header biography portfolio contact form footer At least 3 different animations are used The user can change the theme: dark vs light The user can change the language: at least en and ro It will be responsive at least on mobile. Recommendation: Text that will be translated based on language should come via an api call Nice to have: Use Angular Allow admins to create dynamic content: Use a text area to capture the html text on the admin area Use that html and injected in the page. E.g. below the portfolio section Allow the admin to define a color system from the admin page To keep a history of changes Maybe an rollback mechanism to a previo...
I'm seeking a skilled PCB circuit designer to create a digital circuit f. The primary function of the circuit is PWM Motor Speed Control Key requirements: Input supply voltage: DC 2.5V-25V The maximum output power: 350W The maximum continuous output current :15A The overload and short circuit protecting current is 25A PWM frequency: 25-30kHz Duty Cycle adjustable: 0-100% The operation environment temperature:-20℃-40℃ Ideal freelancer would have: - Proven experience in digital PCB circuit design - Strong knowledge of signal amplification principles - Familiarity with radio technology and its requirements - Ability to optimize circuits for low gain
I am seeking an experienced engineer to design and implement a two-axis machine control system that is capable of: - Effectively controlling and managing the movements of the system along two axes with a LIMITED RANGE. Your expertise in designing systems with the necessary navigation strategies and motion control algorithms will be required. - Providing real-time position feedback to the user. Your extensive understanding of feedback mechanisms particular to these types of systems is a must. Ideal expertise for the job includes: - Comprehensive knowledge in machine systems control and design. - A thorough understanding of motion control strategies. - A background in data analysis and logs processing. The machine is a Bandsaw to cut small logs into planks. ...
...Use colors that enhance readability and draw attention to key areas. Print and Digital Versions: Provide print-ready files suitable for professional printing. Create a digital version that can be easily shared online or via email. Additional Elements: Include a cover page with our logo and a brief introduction to our company. Design a back page with contact information, social media links, and a call-to-action. Reference for Design Inspiration: We would like our pamphlet to have a similar professional look and feel to the maintenance plans pamphlet provided by Larson Air: Larson Air Maintenance Plans. Project Deliverables: Initial design mockups for review and feedback. Finalized design files in high-resolution PDF format for print and digital distribution. Source files in Ad...
I'm in need of a freelancer to assist with labeling text tweets by topic (to aid in machine learning research). Key Requirements: - Labeling 1,000 tweets ...FULL TEXT of each tweet. Also read the brand handle and sector for reference. Make sure to pay attention to any hashtags included. -You do not need to open any URLs. Make your judgment based only on the text. -If the tweet is about sustainability, enter "1" in column E. If it is not about sustainability, enter "0" in column E. -Note that "sustainability" is a broad topic -- it is often a judgment call as to whether a given text is about it. Use your best judgment. -If you are very unsure about whether the tweet is about sustainability, or if the tweet it not in English, enter your best gues...
I'm on the lookout for an experienced video editor with superior skills in advanced editing techniques including color correction, special effects, and audio enhancement. The projec...techniques including color correction, special effects, and audio enhancement. The project comprises editing a video of a duration exceeding 10 minutes. Skills Required: - Expertise in advanced video editing techniques - Proficiency in color correction - Special effects implementation - Audio enhancement abilities Please note, a storyboard or script isn't provided, allowing you full creative control to bring the footage to life. Applications from individuals with a knack for creativity are particularly welcomed. Your portfolio demonstrating your past work would be advantageous during th...
...incidencias y disputas, proporcionando asistencia inmediata. 3. Ubicación en Tiempo Real: Los clientes podrán compartir la ubicación del vehículo en tiempo real. 4. Seguimiento GPS: Función para monitorizar el viaje en tiempo real, asegurando la transparencia y seguridad. 5. Programación de Viajes: Posibilidad de reservar viajes con antelación según las necesidades del cliente. ADMINISTRADOR 1. Panel de Control: El administrador tendrá acceso a un panel con un listado de choferes por categoría (transporte de pasajeros, liviano, pesado). 2. Monitorización de Estado: El panel mostrará el estado actual de cada conductor, incluyendo su puntuación, créditos disponibles y habilitaciones. 3...
I am seeking a developer with a strong frontend skill set. Fullstack developers are also welcome. Compatibility with desktop is a must. Your main responsibility will be user account management, so experience in this area is highly preferable. You will be tasked with developing and maintaining the user account management system of our website. It is crucial that the system is efficient, secure, and user-friendly. Your main job would be to finish my work. The design is done, but some of the requests to the api still remain undone. Therefore you need to finish them and also fix a bug that disallows an user authenticated via google account to add their products to the cart. The job needs to be done by the end of the month
I need 2 engaging 30-second commercial for my brand, Coconut Concoction. The target audience is Gen z, millennials, health enthusiasts, and coconut water lovers. The main themes to convey in the ad are refreshing and energizing, natural and organic, and promoting a healthy lifestyle. Our products focus on refreshing tender coconut water, Ice Apple, frui...post. I will give you other images as well if go ahead with you. Key Responsibilities: -Conceptualize, script, and produce three 30 second commercial videos for the above products. -Highlight the freshness, health benefits, and unique flavors of each product. -Ensure each video aligns with our brand identity ( Tender Coconut Water, Ice Apple) and appeals to our target audience. -Provide clear call-to-action to order via Swiggy ...
We are looking for an experienced UI/UX designer to create an interactive design for our property management application using Figma. The application is intended to streamline property management operations, offering functionalities like task management, team coordination, guest management, and more. Scope of Work: The designer will be responsible for: Creating an interactive and user-friendly design in Figma Developing wireframes and prototypes based on provided sketches and descriptions Suggesting and implementing improvements to enhance usability and aesthetics Ensuring responsive design for both web and mobile views Pages to Design: Home Page: Displays an overview of tasks, notifications, and key metrics for the day. Contents: Summary of check-ins/check-outs, ongoing...
I am seeking an experienced engineer to design and implement a two-axis machine control system that is capable of: - Effectively controlling and managing the movements of the system along two axes with a LIMITED RANGE. Your expertise in designing systems with the necessary navigation strategies and motion control algorithms will be required. - Providing real-time position feedback to the user. Your extensive understanding of feedback mechanisms particular to these types of systems is a must. Ideal expertise for the job includes: - Comprehensive knowledge in machine systems control and design. - A thorough understanding of motion control strategies. - A background in data analysis and logs processing. The machine is a Bandsaw to cut small logs into planks. ...
I'm on the lookout for an experienced GDPR solicitor who can provide sound advice and representation on legal issues primarily concerning data breaches. My organization routinely deals with a considerable volume of potentially sensitive phone call records. Here are the main tasks that the right candidate should be prepared to handle: * Legal Guidance: I need expert advice on how to navigate legal disputes related to potential data breaches involving phone call records. * Legal Representation: The ideal candidate must be well-versed in representing an organization during any potential legal dispute, with an emphasis on data breaches. If you have a thorough understanding of GDPR compliance, with a particular emphasis on data breach protocols - I would like to hear from y...
I am looking for a skilled developer to create a user-friendly desktop application interface that integrates a machine learning model. The primary goal of this application will be to evaluate student applications in real-time. Key Features: - Real-time evaluation feedback: The application should provide instant feedback on student applications, based on the integrated machine learning model. - User authentication: The application should include a secure user authentication system to ensure only authorized users can access and use it. - Data visualization: The application should have data visualization capabilities to help users understand the evaluation process and results better. Integration: - The application will need to integrate with existi...
I need a tech-savvy professional with vast experience in social media account recovery. I lost control of my old Instagram account but I have the username. My main goal is to regain access and permanently delete the account. Key Responsibilities: - Recover lost Instagram account using the provided username - Delete the account upon recovery Essential Skills: - Knowledge and expertise in Instagram account recovery - Experience in similar projects - Understanding of privacy and data security protocols I can provide a driver's license as proof of identity. Confidentiality and transparency during this process are paramount, and I look forward to a successful collaboration.
I require a dynamic sports betting app that is downloadable from both App Store and Play Store. This app should be endowed with a number of important features: - Live Betting: The app should facilitate live betting for users. This will ensure a thrilling wagering experience which I believe, will attract more users. - Daily Predictions: The app should post daily predictions for a variety of sports. This feature should be updated regularly. - Cumulative Betting Options: The users should be given the opportunity to opt for cumulative betting. This will enhance the betting scope for the users and make the wagering more exciting. - Colorful and Dynamic UI: I want the UI design of the app to be both colorful and dynamic. An attractive UI design will not only appeal to the users but also make the...
I'm looking for a skilled developer to create an encompassing HR and Payroll web application that will effectively manage and track time and attendance for about 100-500 employees, and at the same time execute payroll processing. Key Features Required: - Employee Management - Time and Attendance Tracking - Payroll Processing The tool must also have compatibility with existing time and attendance systems. This allows for convenient synchronization and integration of data. Ideal Skills: - Strong back-end development experience - Proven track record with HR and Payroll systems - Familiarity with time and attendance system integration - Able to deliver scalable solutions. In your proposal, please detail your prior experience in similar projects, your understanding of the ...
I'm seeking an experienced Android app developer to create a custom app like Linphone with specific features and design requirements. Requirements: - Voice & Video Calling: The app should allow users to make both voice and video calls. - Custom Design: The app needs a unique, custom design that sets it apart from other similar apps. - Integration: The app should have the capability to call to extensions. Ideal skills and experience for this job include: - Proficiency in Android app development. - Experience with developing communication apps. - Knowledge of integrating calling features with extensions. - Ability to create a visually appealing, custom design. If you have the skills and experience needed, I'm looking forward to receiving your bid.
I am in need of a freelance professional who ca...the Ad Campaign: - The ad campaign should be separate from the magazine, but still aligned with the magazine's target demographic. - I am interested in promoting our rv resort using billboard and signage. Thus, experience and creativity in creating compelling outdoor advertisements is crucial. - The campaign aims to drive traffic to purchase or read the magazine, so understanding of effective call-to-actions and market strategies in this setting is preferred. The ideal candidate for this job would have experience in both magazine production and outdoor advertising, with a keen understanding of how to tailor content to the business audience. Most importantly, I am looking for someone who can bring creativity and fresh idea...
I'm looking for a Flutter developer familiar with sockets for the creation of a mobile application. The primary goal of the app will be real-time messaging, so I need someone who has experience with real-time data updates. Requirements: - Develop a mobile application using Flutter. - Implement real-time messaging functionality using sockets. - No company - remote with my system.
**Job Description:** **Title:** Development and Implementation of an Outgoing Predictive Dialer System **Description:** We are seeking an experienced freelancer to develop and implement a robust outgoing predictive dialer system for our call center operations. The ideal candidate will have a strong background in telephony systems, database management, and CRM integration. The dialer should support dynamic caller ID, IP whitelisting, multiple campaigns, and a minimum of 10 representatives. **Responsibilities:** - Develop an outgoing predictive dialer system that integrates with our existing telephony infrastructure. - Implement dynamic caller ID functionality. - Ensure the system supports IP whitelisting for added security. - Configure the dialer to handle multiple campaigns simu...
Description: We are looking for a highly skilled and motivated frontend developer to create a cross-platform desktop application for Windows and MacOS using Electron.js. The application will manage audio, text, and video data, and will utilize websockets for backend data transfer. Key Responsibilities: Develop a responsive and efficient desktop application using , JavaScript, HTML, and CSS. Implement and integrate features to manage audio, text, and video data. Ensure smooth and secure data transfer using websockets. Conduct thorough testing to ensure the application is robust and bug-free. Work closely with stakeholders to gather requirements and iterate based on feedback. Provide comprehensive and clear code documentation. Requirements: Proven experience ...
i need to creat a mobile app with sign in a'd sign up + 3 pages: 1 where i can publish daily trading signals 2 a tutorial with image a d text 3 an api news where ppl can check daymily economical and financial news 1st page must be like showing i the screen shot
We are seeking a skilled TypeScript (Node.js) Developer to assist with several microservices projects. Your r...standards. Requirements: - Strong proficiency in TypeScript and Node.js. - Experience with microservices architecture. - Familiarity with developing, testing, and debugging microservices. - Ability to work independently and as part of a team. - Strong problem-solving skills and attention to detail. What We Offer: - Detailed information about the microservices and project scope during the introductory call. - A collaborative and supportive work environment. - Opportunities for professional growth and development. If you are passionate about building efficient and scalable microservices with TypeScript and Node.js, we would love to hear from you. Apply now to join our dy...
...mobile optical reader application using OpenCV for image filtering. The main purpose of the application is to apply image filtering effects to the captured images. I would like to have an application made that will read the rectangular optical form with 25 questions and 5 options specified in the appendix, with a phone camera. Through the application, first the user will enter the answer key of the exam, then the correct/wrong/blank questions should be calculated by determining the options marked with the appropriate image processing algorithm. In addition, the number of times each question was marked as correct, how many times as incorrect and blank should be kept during each determination. The application must be developed for Android. The general ...
I urgently need assistance with installing a PHP application on my dedicated Linux server. Key requirements: - Expertise in server management, particularly dedicated servers - Proficiency in PHP application deployment - Strong knowledge of Linux operating systems Please only bid if you have significant experience in this area and can start immediately. Your prompt help is highly appreciated.
As I am looking for an experienced Android app developer, I have a vision for an educational app that helps learners to access educational content with ease. Detailed walk through will be provided on call as I have the front end concept simulation ready. However here are some... Key Project Features: - User login & Registration: We require a secure user login and registration setup that protects the user's data and ensures only registered users have access to our app. - Requires Map integration and working with object on a map (google maps/mapbox, etc). - Implementation of Modal screens. Ideally, the freelancer should have a robust experience in the development of Android apps. The freelancer should be well-versed in creating apps that offer user-friendly interfaces ...
...only 2 Product Name columns (in which the "product details of input file column 2" are listed. (example VAT file attached) 3- The app must check that all the lines present in column D "Product details" of the input file 1 are present in column A of the VAT output file and we have a value in column B. If there are lines that are not present or do not have a value, you must report them in the VAT control output file report (attached). 4- Starting from input file 1 (attached), look for the lines of column D "product details" in column A of the newly created VAT output file and insert the respective value present in column B of the file in column K of the example output file (attached). VAT output. 5- Starting from the output file just created, create a ...
I am currently developing the field oriented control system for a permanent magnet synchronous motor. My goal is to improve the speed response, specifically the acceleration time, deceleration time, and steady state error. The project involves the tuning of PI controllers within the system, meant to enhance its overall performance. For this task, a proficient knowledge of control systems, system modeling, and tuning methods is required. Previous experience with PI tuning is beneficial. Currently, MATLAB/Simulink is being used for modeling and system simulation, hence proficiency in it is crucial. Ideally, the candidate will have extensive experience using MATLAB for complex motor control simulations. However, I haven't defined the specific tuning methods to be...
I am looking for an expert with solid experience in Field Oriented Control (FOC) of Permanent Magnet Synchronous Motors (PMSM) who can help tune my PI controllers for more precise speed control. Here are the specifics: - I have an established model using MATLAB/Simulink, and the PI controllers are already implemented. - The key outcome I want is to enhance the accuracy of the speed response. The ideal candidate will have: - Extensive knowledge and experience with PMSM and FOC. - Proven background in tuning PI controllers. - Strong proficiency in MATLAB/Simulink. Your task will involve analyzing the existing model, suggesting enhancements for the PI controllers, and implementing these changes to achieve a more precise speed response.
I seek a Laravel expert to convert my existing Codeigniter application. I aim for an improvement in performance over the current set-up. This will involve a transition of these existing features: This is AEPS, BBPS, DMT, & multiservice application . - User Authentication System - Database Management - API Integration - Full codebase transition Our current application does not utilize any specific third-party libraries or integrations, so there's no worry about adapting such complexities. A comprehensive knowledge of both Laravel and CodeIgniter is a necessity for this assignment. Also, an understanding of API integration and database management will be vital to ensure a smooth transition. I'm looking for someone with a keen eye for maintaining effic...
...despacho de los productos a los clientes, de la misma manera, esta información debe quedar albergada en el sistema con el fin que desde el área administrativa y financiera permita la consulta en tiempo real de los indicadores con el fin de poder tomar decisiones oportunas y ser más competitivos en el mercado. A continuación, los problemas y la necesidad de cada uno de estos: • Problema No hay control en el presupuesto para la ejecución de los planes de mejoramiento • Módulo solicitado Módulo de talento humano • Requerimiento funcional (E) Crear una función dentro del sistema información que permita el área de talento humano poder ejecutar el presupuesto financiero para su área, permitien...
...software developer to create code for a power electronics control system. The project involves using an Arduino DUE and the IMC101T T038 motor controller. The software should control and regulate both the grid side and machine side using Space Vector PWM (SVPWM). Communication between the Arduino and other components will be handled via serial communication. Additionally, the system should include a quadrant display using 4 LEDs to indicate whether it is operating in motor or generator mode. All datasheets and circuit diagrams will be provided. Key Responsibilities: Control and Regulation: Implement SVPWM on both grid and machine sides. Grid-side control: Adjustable power factor (cos(φ)), current, and power. Machine-side control: Adjustable fiel...
Upload application on google play console.
Develop a WeChat/Alipay app for a large-scale event in Hong Kong, you need to use it on WeChat/Alipay. It can be used by people in Hong Kong, Macau and China. The functions are mainly used to view event information, videos, reminder functions, mini games, contact customer service, and connect Department external website
I'm changing the requirements if that will help. My Quasar Application now has a Node.js server running inside the app. If someone has worked with Anthropic can can get the POST requests to work thats all that I will need. I need a person that has worked with Anthropic AI When you bid on this project start your bid with "I CAN DO THIS" There is so much automated bids that it just wastes time. Also bid responsibly and don't ask " What's your budget" Bid what you think it's worth to you. I want a clean new Quasar Application that you load "@anthropic-ai/sdk": "^0.21.0", and makes a call using Setting up a demo Quasar app takes less than 5 min. my sample code: async sendMessageToClaudeChatbot(message)...
Hello We are looking for a Google Play Console user who can help us with app upload. The ideal candidate should be familiar with the Google Play Console and have experience in uploading apps to the Google Play Store. The main responsibilities of this role include managing app listings, uploading Apps, and ensuring compliance with Google Play policies and guidelines. We are seeking someone who can efficiently navigate the Play Console interface, troubleshoot common issues, and optimize app metadata for better visibility. If you have a strong understanding of the app submission process and can deliver high-quality results, we would love to hear from you! Skills needed: - Google Play Console - App upload - APK management - Google Play policies - Troubleshooting - Responsible with work Look...
I'm specifically interested in a 3D and animated style logo for this project. The logo will primarily be used on our website and Visiting Card and T-Shirt, so it should be versatile enough to look good i...problem in that...background of block can be of black or grey or navy blue...any colour. This logo if I use on whats app with my customers should animate. If you think my idea of Blue and Orange is not that good and you have some better colours in mind, I won't mind using that, but my first preference would be blue and green. Keep a slight colour difference between Icon and word "Galaxy" DO NOT call or whats app me, communication should happen through Freelancer chat only. One who delivers within1 day has higher chance of getting his logo selected, of course...
I'm in need of a skilled Web Application Developer to create a sales incentives system that will handle complex calculations and generate comprehensive reports. Essential Features: - Commission Percentage Calculation: The system should be able to calculate the commission based on the sales made. - Bonus Calculation: The application needs to compute bonuses based on the sales targets achieved. - Tiered Incentives: The system should offer tiered incentives based on the sales performance. Additional Requirements: - User-Friendly Interface: The application should have a simple, intuitive interface for easy usage. - Reporting: The system should generate detailed reports on the sales incentives calculations. - Security: It's crucial that the application e...
Project Title: Basic Audio Note Organizer App (Working Title) Project Description: I need a web application developed to manage and organize short audio recordings. Users should be able to upload audio files (3 seconds max) and categorize them with basic labels. Key Features: User accounts and login system Ability to upload audio files (3 seconds max) - MP3 format preferred Option to add simple labels (e.g., "Meeting Notes," "Quote") to each audio file Ability to sort and filter audio files by upload date or label Basic interface for browsing and listening to uploaded audio files Secure storage of user data (audio files and labels) Target Audience: This app caters to users who want a simple way to organize and access short audio snippets for personal use. Th...
Looking for someone to ...photos on the device and upload those to the selected order (also though a Rest API). Detailed Requirements: Setup screen where system URL and API key can be entered and then saved so subsequent uses of app doesn't require it to be reentered Ability to search and find order using order number, customer name, or company name Ability to select multiple photos and upload at once (although API call needs to be made for each file) Ability to take picture with camera right in app as well as select from gallery Full code ownership Nice to Have: Checkbox that allows deletion of photos on device after a SUCCESSFUL upload Not intending to publish this in app store as this is meant for employees at a company only. Will need help figuring out how to inst...
...and appealing look. This means including preset themes for customization. We have a model on google colab which uses GEMINIAI and answers based on the prompt. I need to integrate this into the website. The website will answer questions on "How to fix___?" by returning the tools required and the steps to perform. Additionally, I need the links for buying those tools included at the end so an API call needs to be added. Ideal candidates for this project should have: - Proficiency in GeminiAI use, NLP, API, chatbot development, and web development. - Experience with integrating AI models into websites. - Strong skills in UI/UX design, particularly in designing chat interfaces. If you're confident in your ability to deliver this project within the specified time fram...
I'm seeking a skilled web designer to revamp my website with a focus on elevating conversion rates. Additionally, I require the deployment of the redesigned website onto a new server. Key Objectives: - Redesign to Improve Conversions: The primary aim of the redesign is to enhance user experience and bolster the site's conversion rates. Particularly, I'm interested in optimizing call to action buttons to boost user engagement and ultimately, conversions. - Server Deployment for Enhanced Performance: The new server deployment should prioritize faster loading times. A significant aspect of this project is to ensure that the website works seamlessly on the new server without any disruption to its functionality. Ideal Skills: - Proven experience in website redesign wit...
It is necessary solve two bugs to a Laravel application regard the frontend of condition use php 7.4. if it is necessary you must do changes to the database and the backend
