Html css javascript app android jobs

I'm in need of an experienced developer who's proficient in a range of technologies including HTML, CSS, JavaScript, Stripe, PHP, SQL, and XAMPP. Key Issues: - **Login Functionality**: I've encountered a problem where the user isn't being redirected to their profile page after logging in. This issue needs to be fixed promptly. - **Shopping Basket Functionality**: The project also involves fixing several aspects of the shopping basket. I need assistance in: - Ensuring a message is displayed when the same item is added to the cart again, thus preventing duplication. - Maintaining the cart products even after the page is reloaded. - Implementing a capability where the number of items in the cart icon increases on addition and decreases on removal. - I...

need of a web developer who can successfully design a user friendly and seo friendly that will attract customers . Having a payment gateway (PayPal and cashier cheque within United States) functionality is a must for the platform. Technology wordpress html css php javascript etc should be use

Hello, I'll optimize your site Guaranteed 90+ score on Google Page Speed, A+ grade in GtMetrix with 4-5 seconds maximum loading time for permanent. You will get these things in my Advance Speed optimization:- 1: Images will be properly optimized. 2: CSS & JS will be minified. 3: HTML will be minimized. 4: Remove unnecessary codes from your site without breaking the site. 5: Deferred javascript on larger size elements. 6: Database will be Optimized I'm a professional Website optimizer and have more than 4 years of experience in it. I will do this project in 6hrs. I optimized almost 100+ websites and gave my clients 100% satisfaction. Hope you will give me a chance to work with you. Looking forward to working with you.

We have a Progressive Web App that works fine on our local VisualStudio 4.0, but it crashes when downloaded from Google Play Store. It crashes immediately. Please note: - The app simply calls our website and is basically a PWA - It has only 1 activity - we will be sharing the manifest and gridle. Ideal Freelancer: We're looking for an Android developer with experience in troubleshooting and fixing Android issues. Familiarity with Progressive Web Apps and debugging Android applications would be beneficial.

I am looking for a front end developer to code the front end of my 5 page company website. I have a design ready and need someone to bring it to life. The website will have 4-7 pages in total. Ideal skills and experience: - Proficient in HTML, CSS, and JavaScript - Experience with responsive design - Knowledge of front end frameworks such as Bootstrap - Attention to detail and ability to accurately translate design into code - Strong communication skills to collaborate with the design team.

...highly skilled mobile app developer who can work on both iOS and Android platforms. Your primary tasks will involve: - Designing and implementing user interface improvements. - Executing bug fixes. - Performance optimization. While not all improvements have been specified, I'm searching for an expert who can also provide valuable input in terms of enhancements. Applicants must have: - Proven experience and success in mobile app development, particularly in the application improvement sector. - A comprehensive portfolio of past work clearly demonstrating abilities and efficacy. - Comprehensive project proposals detailing how you intend to meet our projects objectives. Although no new features have been currently specified, knowledge and experience in iOS ...

I'm looking for a skilled and experienced web developer to create a portfolio website for me. ...the primary focus of this website will be on creating a visually appealing and user-friendly design. - There should be a dedicated section for testimonials. These testimonials should be easy to update and manage. - I prefer to manage the website content by directly editing HTML/CSS. The developer should ensure that the structure of the code is clear and well-documented for easy editing in the future. The ideal candidate for this project should have: - Proven experience in developing portfolio websites. - Strong HTML/CSS skills. - Ability to create a visually appealing and user-friendly design. - Experience with integrating a testimonials section. - Good com...

As a startup launching team, we're in need of a proficient Flutter developer. The app will be launched on both Android and iOS platforms. Although specific features haven't been outlined, you need to be adept at understanding and creating a range of app functionalities. Key Points: - Flutter - get_it package - flutter_bloc package - Supabase - Feature driven development - Clean architecture - Build for android and ios Key Skills: - Proven experience in using Flutter to build cross-platform mobile applications - Expertise in coding using Dart language - Strong understanding of the mobile app development life cycle - Ability to problem-solve and debug Expected Delivery: - We need the project completed ASAP. So, the ability to work under pres...

...connect with external services if needed. ? **Budget and Timeline:** - **Budget Range:** Please provide your estimated budget for the project, considering the complexity of developing a conversational AI website. - **Timeline:** Share your expected project duration, including milestones and deadlines for completion. ? **Requirements:** - Proficiency in web development technologies such as HTML, CSS, JavaScript, and frameworks like React or Angular. - Experience in building chatbots and integrating AI services for natural language understanding. - Strong UI/UX design skills to create an engaging and interactive website. - Ability to customize and tailor the chatbot's responses and behavior according to specific requirements. ? **Deliverables:** - Develop a fu...

I need an Android application that can process a provided Excel file and display the data in various ways. Key Features: - The app should be able to read the Excel file I provide. - It should show the numeric data per line and column as specified in the Excel. - It should also be able to perform statistical analysis on the data. - The app should provide graphical representation of the data. Users should be able to interact with the data within the application in a 'view only' mode. Ideal Skills: - Proficient in Android app development - Experience with Excel data processing - Ability to implement statistical analysis in an app - Familiarity with graphical representation in mobile apps - Excellent understanding of data visualization ...

I urgently need a personal blog template created, ideally in a matter of days. Key Requirements: - Speed is of the essence. I need a professional looking, responsive blog template that can be easily customized to fit...template should be user-friendly and not overly complex. A streamlined, simple design is preferred. - While the site does not require social media integration at the moment, the template should have the flexibility to easily incorporate this in the future. Ideal Skills and Experience: - Proven experience in web design, with a strong portfolio of high-quality, responsive sites. - Proficiency in HTML, CSS, and other relevant programming languages. - Excellent understanding of UX/UI principles. - Ability to work under pressure and deliver high-quality work on ...

must have good internet at home!

...money? We have the perfect opportunity for you! We are seeking freelancers to perform an easy, fast, and lucrative task. Requirements: Own an Android phone. Install the application provided by us. Have internet access from one of the listed ASNs. Daily Task: On business days, open the application. Click on the "Scan" button. Wait for the scan to execute on the screen or minimize, as the scan runs in background mode. After the scan is completed, the data is sent, the process is finished, and you earn $1.25. The process is super quick, lasting from 3 to 10 minutes. Maximum of 1 scan per day, only on business days. You can check your balance in the app. Payment: Payment will be based on the number of days scans were performed. Payment will be made within 5 days a...

I need a talented email template designer with a deep understanding of how to make my newsletters, created, compatible with various Outlook versions - specifically Outlook 2010, 2013, and 2016 etc. The current issues I'm facing include: - Images not displaying ...make my newsletters, created, compatible with various Outlook versions - specifically Outlook 2010, 2013, and 2016 etc. The current issues I'm facing include: - Images not displaying correctly - Formatting issues - Layout problems Your primary task will be to create an updated template that renders consistently and correctly across these Outlook versions. Ideal skills: - Proficiency in HTML and CSS - Experience in email template design and troubleshooting - A strong grasp of cross-client compatibilit...

I'm in need of a skilled full stack developer to complete a section of my web project within the next 5 days for 95$ . The database is fully set up and ready to go. The HTML and CSS is mostly designed, but needs more enhancements. The main languages left for you to implement are JavaScript and PHP. Key Requirements: - Experience in full stack web development - Proficient in JavaScript and PHP - Ability to work quickly and efficiently Your role will be crucial in bringing my project to completion. Please bid only if you're confident you can deliver within the specified time frame.

...experience in building android applications specifically related to health and fitness. Your task will be to develop a mobile application solely for the Android platform. Key areas of responsibility will include: - Designing and developing the Android application from scratch. - Ensuring optimal performance of the app. - Collecting and integrating data from users. Please note, the primary function of this application will fall under the health and fitness category. Since the main features were not specified, I'd like you to consider standard health and fitness tracking elements like step counter, exercise tracking etc. Essential Skills: - Previous experience in developing Android health and fitness applications - Proficient with Kotlin - A go...

I'm seeking a skilled developer to create a responsive HTML email template that promotes our product. Key Requirements: - The email to be responsive to different devices and, to have text and image elements as they are in the design files - It should also include clickable call-to-action buttons to direct customers to our website for purchases. Skills and Experience: - Proficient in HTML and CSS, with a strong understanding of responsive design for emails. - Experience with creating email templates for product promotion. - Ability to follow specific branding guidelines, including color schemes and logo usage. Please provide examples of previous work, particularly any similar email templates you've designed. A quick turnaround time would be a...

I'm looking for an experienced Android app developer to create an innovative and engaging mathematics app. The app will cover basic mathematical operations, along with advanced features. E.g.- maths tricks workout app. Key Requirements: - The app should encompass addition, subtraction, multiplication, division and also squares tables, percentages, cubes, and triplets. - An interactive and user-friendly design is essential. - The app should be accurate and reliable in its calculations. Additional Information: - Knowledge of advanced mathematics and educational app development will be a plus. - The app should be optimized for Android devices of various sizes and operating systems. - Creativity in presenting mathemat...

I'm in need of a Kotlin-based Android developer to assist in creating an education app. The app will target students from K-12 and college levels. It should be designed with a simple and clean interface. Key Features: - Quiz Functionality: The app should be able to host and administer quizzes. - Progress Tracking: It should enable students to track their progress and performance. - Multimedia Content: The app should support various forms of multimedia content. Ideal Skills: - Proficiency in Kotlin for Android development. - Prior experience in developing education or quiz-based apps. - Understanding of user interface design for simple and clean layouts.

hi, I want a simple android application. I have a PLS file. It is a nonstop broadcast audio. The app need to send that audio to zello application. Thus the idea is the only audio that goes to the other application is the PLS file. I dont wanna hear other things (audio) of the phone

...we ourself use Elementor pro as prototyping, so our team already has a good pace on Elementor. So we do not require the mates who have done only a few pages with Elementor, this is a beginner level. We require a person, who have already implemented hundreds of Elementor only pages. Also we do not require the mates, who do all things in CSS instead in Elementor. CSS is a last path for us, if Elementor integrated solution will not work. So if you are such a CSS guy, this job is also not the right one for you. If you are a manager or sales persons and not the Elementor developer, you will fail in the interview, since the interview will be on detailed technical level. And be aware - we had already a lot of interviews - and ALL sales or manager person failed them. The ...

I'm seeking a talented Shopify specialist with a proven track record in theme customization, app integration, and store setup. It's crucial that the expert also has skills in HTML/CSS and understanding of SEO optimization. - Primary responsibilities include: - Customizing our Shopify theme per our requirements. - Integrating essential apps into our Shopify store. - Setting up our Shopify store for best practices. In addition to your Shopify expertise, we require: - Proficiency in HTML/CSS for any style adjustments. - Knowledge of SEO, to optimize our site for better organic outreach. The main purpose of our Shopify website is e-commerce. Therefore, an individual with a solid background in improving shopping experiences and in-...

As an expanding business, I am currently in need of a pr...Integration: For proper data management across the software. - File Uploading: To manage and share crucial business documents. - Location Tracking: To track employees, items, or orders. - CRM: To manage business relationships and customer data effectively. - Project Management: For greater organization and efficiency. - Statistics: To analyze data and gain insights. - Multiplateforms: Must run on Web, Android and IOS Ideal candidates will have a proven track record in PHP programming, with a portfolio highlighting their expertise in all the functionalities listed above, especially in designing business management software. Experience in working with E-commerce, social networking or content management systems could also be b...

I need a professional to design and build a static, responsive website that beautifully showcases my curriculum vitae. This would require strong web development and design skills with an emphasis on: -HTML/CSS coding abilities. -Proven expertise in creating infographic layouts. -A knack for clean, attractive design. Key details: • The website's color scheme should predominantly be blue. • Content should be presented in infographic style. • Essential features should include sections for 'About Me', 'Education', 'Work Experience', 'Skills', 'Projects', and 'Contact Information'. • I will provide a sample CV. Its details must be thoroughly and accurately incorporated into the website. Thank ...

I'm in need of an Android app that can scan barcodes, send the scanned data over UDP in text format. Requirements: - Android only: The app should be specifically designed for Android devices. - Barcode scanning: The app should be able to use the device's camera for scanning barcodes. - UDP sending: The app is expected to send the scanned data over UDP in text format. -The UDP IP address and port needs to be configurable within the app for each application -The app is used in a closed environment only, not for public distribution Ideal Skills and Qualifications: - Proficient in Android app development - Experience with integrating barcode scanning functionality - Strong understanding of networking pro...

Hello, Greetings from Verbolabs!! We have a potential project requirement for Technical Content Writers. Here are the project requirements: Ability to understand and accurately translate technical information for a general audience in different industry sectors. Knowledge of coding and scripting languages, such as C++, Python, HTML, CSS, and JavaScript. Ability to research and write SEO-friendly and AI-based content with basic editing knowledge in infographic design. 2 years of technical writing experience with computer science/software knowledge and communication/journalism background. Certification of technical documentation / AI prompt courses. English - mandatory (professional and fluent) We will provide guidelines and instructions, so you can understand what ...

I'm looking for a talented Flutter developer to create a mobile application that can run smoothly on both iOS and Android platforms. The primary purpose of this app will be for me to personalize it according to my preferences. Key requirements for this project include: - The ability for me to fully customise the app's user interface design. - API Integration - FCM Push Notification - Google Map Service - Implementing a flexible color scheme that can be easily altered as per my requirements. I'm looking for someone who has strong experience in Flutter, and has previously worked on customised apps. Good problem-solving skills and an understanding of UI/UX principles will be a huge advantage. Please share your experience with Flutter and customization of mob...

...professional website for our IT solutions company. The website will serve as a platform to showcase our services, highlight key features, and engage potential clients. We aim to deliver a visually appealing, user-friendly, and mobile-responsive website that reflects our commitment to innovation, collaboration, and excellence.   Technical Specifications: - UI/UX Design: Figma - Front-end Tech: HTML, CSS, JavaScript - Back-end Tech: Laravel - Database: MySQL   Key Features: 1. Homepage: Banner, Introduction, Service Highlights, Call to Action. 2. About Us Page: Introduction, Our Story, Our Team, Why Choose Us, Community Engagement, Contact Us. 3. Services Page: Service Offerings, Technology Solutions, Case Studies, Benefits. 4. Contact Us Page: C...

...to provide details about their project, including project location and current roof condition. These details are crucial for me to provide accurate quotes and assess if the project is within my service area. I'm looking for a freelancer who: - Has a proven track record of designing effective lead-generating landing pages, ideally in the home improvement or service industry. - Is proficient in HTML, CSS, and can create a mobile-responsive design. - Has experience with effective call-to-action strategies and form design to maximize lead capture. - Can implement the necessary lead capture forms and ensure the data is correctly stored and accessible for me to follow up with leads. Looking at this YouTube to get an idea of the style we are looking for:

I'm looking for a skilled JavaScript developer to assist me with website development. This project primarily involves front-end development, so experience in this area is a must. Key Responsibilities: - Collaborate with me to create a visually appealing and functional website - Implement front-end features and ensure they are responsive - Identify and fix any bugs or issues that arise during development Ideal Skills: - Proficiency in JavaScript and its best practices - Previous experience in website development - Strong understanding of front-end technologies like HTML and CSS Having experience with JavaScript frameworks like React, Vue.js, or Angular would be a plus, but it's not a requirement for this project. Your creativity, attention to ...

I require a proficient developer capable of building a front-end web app exclusively for developing a web app which we designed for our IoT product. Qualified candidates should be well-versed in: Must have: - JavaScript - React.js Good to have: - The web app is designed and prototyped in Figma. This design needs to be implemented to bring the app to life using React.js. Looking forward to seeing your bids.

I'm looking for app developer who can build, test and publish the app with few modification from the source code. All the function of app should be working flawlessly. App source code location and every other details is mentioned in attachment. I am looking for a developer who can not only create a functional, high-quality app, but also adhere to tight deadlines. Experience in creating cross-platform apps and working under pressure is a big plus.

I'm in need of a simple, yet professional WordPress templat...professional WordPress template. The site is intended for an informational purpose, focusing on the tech & gadgets niche. Key Requirements: - The website should consist of Home, About Us, and Contact Us pages. - The template should be easy to navigate, with a modern and engaging design. - It must be easy to manage and update directly through HTML/CSS files. Ideal Skills & Experience: - Proficiency in WordPress and theme development. - Strong grasp of HTML and CSS for easy content management. - Experience creating templates for technology or gadgets industry will be highly valued. I'm looking for a freelancer who can deliver a visually appealing, functional template that aligns w...

I'm seeking an outstanding UX designer with Android app experience for a MultiSport app project. The significant features of the app will include: - Live score updates - Dashboard for organisers - Player statistics - Live Scoring The candidate preferably has prior experience in designing highly interactive and visually appealing sports apps. A basic understanding and interest in various sports would certainly be beneficial. I'm looking forward to hearing from enthusiastic professionals who can help bring this project to life.

...Responsibilities: - Develop a minimalistic design for the frontend - Implement key features such as search functionality, data visualization and suggestions from the LLM model ( mostly pdf) - Ensure the design is user-friendly and responsive across various devices Skills and Experience Required: - Proficiency in React is essential - Strong understanding of frontend technologies including JavaScript, HTML/CSS and TypeScript - Proven experience in developing minimalistic and user-friendly designs - Previous experience with search functionality and data visualization is highly desirable Ideally, you would be a self-starter who can work independently and efficiently to deliver a high-quality and functional product. Your attention to detail and understanding of user ex...

I'm in need of a video player specifically designed for Android, to be used on Meta Quest 2 and 3. The player must support a range of video formats such as MP4, AVI, MOV, and WEBM. It should possess the following additional features: - Playback controls: The player should allow basic playback functionalities like play, pause, stop, fast-forward, rewind, etc. - Control by commands from PC: The player must be controllable via commands sent from a PC. - Playback in 3D mode: The player should support 3D modes like side-by-side (SBS) and over/under. - Support for spherical and cube projection: It must be able to handle popular types of cube projection for both spherical and cube video formats. - Adjustment of screen geometry: The player should allow for the adjustment of the screen...

I'm in need of a skilled developer who can integrate JavaScript codes to link two HTML and CSS pages together. Key Responsibilities: - Implement JavaScript codes to connect the HTML and CSS pages effectively - Ensure seamless, bug-free and smooth user experience

I'm looking to have an e-commerce application developed for both iOS and Android platforms. The core functionality of the app would revolve around e-commerce. Freelancers who have prior experience in developing similar e-commerce applications will be ideal for this project. Key Features: - The app should support popular payment options including credit card, PayPal, and cryptocurrency. - It should have user-friendly UI/UX, facilitating simple navigation and secure transaction processes. Skills and Experience: - Prior experience in e-commerce application development - Proficiency in both iOS and Android development - Knowledge of integrating versatile payment gateways - Strong eye for design and user experience

I am looking for reactJs freelancer who can work on travel project . I have design ready + Html and css,. I can provide you all apis(Json based). For now i need for below: a) Home page with Search box b) Hotel Result page with filters and sorting c) Hotel Detail Page Need Exact cost so that i can finalize. Agencies/tech companies please do not allow.

I'm seeking a knowledgeable professional to develop a custom-made FileMaker Pro CRM. The essential features should encompass: - Robust Contact Management: ability to effectively manage customer relationships - Inventory Management: ...The essential features should encompass: - Robust Contact Management: ability to effectively manage customer relationships - Inventory Management: keep track of stock levels - API connections: specifically for live-changing prices, the CRM must connect with a stock market API for real time feedback The developed solution needs to be versatile across a variety of platforms including Mac, iOS, Android and Windows. Strong experience with FileMaker Pro, database management, API integration and multi-platform development would be indispensable fo...

I have an Android app that I want to submit to the Google Play store. The app does not include any in-app purchases. This App is designed and used by 1 company only (not for all users, users can not register), that company will create and give account for their employees. Data in app is stored in company’s server. Now when we upload to Google play, it has been rejected as image below. We submitted many times safety data form with variety data, but google still reject our app. We don’t know where problem is. Our safety data from or our app, our code. The images below are API we use in our code, and feedback from Google. Please help us to submit this app to Google Play store.

I am looking for an Android AOSP developer with experience with CM/LineageOS to building a custom-rom/firmware Project Details: - device is based on MT6580A - current firmware is only available as binary and working in 98% of cases - we need to improve it, but vendor does not exist anymore - I need to recreate from scratch the firmware with Google's Android sources and with mediatek drivers around it. We can share you a fresh Ubuntu 22.04 or any other Ubuntu version required on a system to run the code. It is required to have multiple years of experience with Android Firmware development and packaging for Android Watch If you have also experience in Android Watch / WearOS Firmware development

I'm looking for an experienced UI/UX designer to create a unique and engaging fantasy gaming app design for multiple platforms, including iOS, Android, and Web-based. The main purpose of the app will be free fantasy gaming and vioce chats, so the design must be visually appealing and intuitive for users to navigate. The app will also require integration with several third-party services, including: - Social media platforms: for easy login and sharing of in-game achievements. - Payment gateways: to facilitate in-app purchases and other transactions. - Cloud storage services: for seamless synchronization of game progress across different devices. I need a designer who has a strong portfolio of similar projects, particularly in the gaming sector. It&#...

...of relevant IT experience, including designing and deploying enterprise-level business or technical applications. • Proficiency in a wide range of distributed and cloud technologies, with expertise in integrating and configuring them, such as Cloud, Containerization, Microservices, Kafka, Java/JavaScript, Quarkus/Spring, XML/JSON, Apigee/Mulesoft, ESB/Datapower, distributed databases like Postgres/Yugabyte, HTML5, CSS3, MVC, Angular JS, React, Mobile and Application Middleware, PhoneGap/iOS/Android SDKs, CI/CD, etc. • Strong understanding of mobile and web application security concepts, session management, performance optimization, automated testing techniques, high availability engineering, and database technologies for mobile and web applications. • Fam...

We are seeking an experienced Android developer to integrate PhonePe Payment Gateway SDK into our existing Android Java application. The primary tasks include implementing functionality for order placement and wallet recharge within the app. Requirements: Proficiency in Android Java development. Experience with integrating third-party SDKs, specifically PhonePe Payment Gateway SDK. Ability to implement secure and efficient payment processing features. Attention to detail and adherence to project deadlines. Clear communication skills. Budget: Under ₹2000 Timeline: Within 2 days If you have the required skills and can meet the specified budget and timeline, please reach out to discuss the project further.

I am in need of a skilled Flutter developer, experienced in working with the Android platform, to build an SMS read and write feature into an existing application , via api need to create automation and need to use sms service of carrier. Key responsibilities will include: - Implementing a system capable of both reading incoming SMS and sending automated SMS responses. - This system will largely be used to automate tasks within the app, so an understanding of automation within Flutter is beneficial. - Due to the platform-specific nature of this role, Android development expertise is a must. The ideal candidate will have a strong understanding of how to use Flutter to harness the capabilities of the Android operating system, specifically in relation to SMS f...

...a knowledgeable developer who can help me integrate SDKs on both iOS and Android platforms. Key Requirements: - Extensive experience with SDK building and integration on both iOS and Android. - Strong understanding of software development kits and how they can be implemented. Please include details about your experience with SDKs on both platforms in your application. This is for a migration project. Users have version 1 of an application installed. We have changed the backend and frontend stack and are launching version 2. We want our active users to be logged into new app (upon updating) without logging in again. Our SDK needs to detect old active user and share specific parameters via SDK to new app so a flow can be triggered to log the use...

...an experienced Moodle developer who can customise the registration form for my site and integrate it with Google and Microsoft for single sign-on (SSO). Key tasks include: - Redesigning the registration form layout - Creating a system to enable potential users to sign in using their Google or Microsoft accounts The ideal candidate for this project possesses strong experience in PHP, HTML, CSS, JavaScript, as well as extensive knowledge of Moodle, and significant experience with Google and Microsoft API. A keen eye for design and usability is also appreciated. Your bid should include examples of similar Moodle customisation projects you've handled, and information on how you plan to tackle this assignment. Looking forward to collaboration with a skilled expe...

I'm a newbie in JavaScript programming and I'm interested in learning either Angular or React JS to create specific projects. I'm looking for an experienced professional to guide me through getting up to speed with either Angular or React JS. Key Requirements: - Strong experience in either Angular or React JS. - Proven ability to teach beginners effectively. - Understanding of the nuances of JavaScript programming. Ideal Skills: - Proficiency in Angular or React JS. - Teaching/training experience. - Good understanding of JavaScript fundamentals.

I'm looking for a Flutter expert to build a minimalist notes module that supports Android, iOS, and Web platforms in flutter UI Design in flutter Key requirements: - Develop a Flutter UI with a minimalist design - Implement functionality for creating, editing, and deleting notes - Ensure the module works seamlessly across Android, iOS, and Web platforms Your key responsibilities will be: - Understanding my requirements and translating them into a functional Flutter module - Conducting thorough testing to guarantee smooth functionality - Ensuring the module is user-friendly and visually appealing Ideal skills and experience include: - Proficiency in Flutter and Dart programming