Freelancer node js developer jobs
...WebdriverIO. When I run npm run wdio, the process starts well, but I encounter the following error: Uncaught Exception: stashbox/src/ import {app, BrowserWindow} from 'electron'; ^^^^^ SyntaxError: Cannot use import statement outside a module at wrapSafe (node:internal/modules/cjs/loader:1385:20) at Module._compile (node:internal/modules/cjs/loader:1435:41) at Module._extensions..js (node:internal/modules/cjs/loader:1564:10) at (node:internal/modules/cjs/loader:1295:32) at Module._load (node:internal/modules/cjs/loader:1111:12) at c._load (node:electron/js2c/node_init:2:16955) at cjsLoader (node:internal/modules/esm/translators:350:17) at ModuleWrap.<anonymous> (node:internal/modules/esm/translators:286:7) at (node:internal/
I'm seeking a skilled Spring Boot and Kotlin Android Developer for creating a robust backend API. The API will primarily provide backend support, handling user requests and processing data. Key Responsibilities: - Develop a backend API using Spring Boot and Kotlin to support an Android application. - Implement user authentication through various methods including OAuth, JWT (JSON Web Tokens), and Basic Auth. - Handle data processing, primarily dealing with text and JSON data. - Ensure the API is capable of robustly managing backend support tasks. The ideal candidate should have: - Proven experience in Spring Boot and Kotlin. - Strong skills in Android development. - Familiarity with various authentication methods, particularly OAuth and JWT. - Ability to handle and process t...
I'm developing a Progressive Web App (PWA) for a banking platform and need a seasoned ReactJs and API UI developer. Key Features: - Implementing essential PWA functionalities such as offline capability, push notifications, and responsive design. - Developing UI to support crucial user interactions like account balance display, fund transfers, and transaction history. Ideal Skills: - Proficiency in ReactJs - Experience with PWA development - Strong understanding of API integration - Prior work in banking or finance-related applications is a plus. Your role will be pivotal in creating an intuitive, responsive, and fully functional banking PWA. Looking forward to your bids.
I'm seeking a talented AI developer with a focus on machine learning. The ideal candidate will have a strong understanding of AI technologies and experience in developing AI-driven solutions. Key Responsibilities: - Design and implement machine learning models - Collaborate with me on innovative AI solutions Ideal Skills: - Expertise in machine learning - Strong problem-solving skills - Passion for AI and technology
I'm in need of a skilled frontend developer with Angular expertise, specifically using Angular 18 and typescript. The project will involve working with a combination of my existing design assets and creating new ones.
We are working on an ERP system designed to manage purchases and maintenance for a small fleet of tugboats spread across multiple countries. The project is entirely focused on backend development using Python, and we are looking for an experienced developer to support the development of a new module. This project is part of a larger, long-term initiative with a duration of approximately 4 years, so there may be additional opportunities in the future. What You’ll Work On You will start with the development of a CRUD page with 3-4 fields for managing records. This task is meant to familiarize you with the system and lay the foundation for progressively more complex backend tasks, including: Expanding existing workflows related to permissions, profiles, and access grants, with ...
I'm seeking a seasoned iOS Developer with extensive experience in creating, designing, and maintaining iOS applications, particularly for IoT. This project is currently in the Concept/Design phase, and I anticipate a work duration of 30-45 days with the possibility of extension. Key Responsibilities: - Design and develop iOS applications using Swift and Objective-C. - Collaborate with cross-functional teams through periodic updates. - Develop solutions for seamless communication between mobile apps and IoT devices using Bluetooth, Wi-Fi, NFC, and other relevant protocols. - Integrate IoT data streams and device APIs to enhance app functionality and user experience. - Troubleshoot and debug issues related to hardware-software interactions. Ideal Candidate: - Holds a BCA/MCA/B...
I'm seeking a seasoned Windows developer with robust SQL Server expertise to assist in data updates on a Windows server database. Key Responsibilities: - Execute updates on existing records within the SQL Server database. - Ensure data integrity and consistency during the update process. Ideal Skills: - Proficient in Windows development and SQL Server management. - Excellent problem-solving capabilities, particularly in data handling. - Strong attention to detail to maintain data accuracy.
I'm seeking a talented UI/UX designer to revamp the look of our web-based payment application. The design should resonate with young adults aged 18-30, making it no...audience: tech-savvy young adults - Enhance user interaction while maintaining simplicity Required Skills: - Proficiency in Adobe XD, Sketch, or similar tools - Strong portfolio with web design projects - Experience in UI/UX design for payment or financial applications - Awareness of current design trends for younger demographics - Excellent communication and interpretive skills - Technologies Require JS, HTML, CSS, Ajax The final design should not just be visually impressive but also user-friendly, ensuring an intuitive payment process. Please share examples of previous work that might be similar to this projec...
Title: Experienced WordPress Developer Needed to Build a Professional Website Job Description: We are seeking a highly skilled and experienced WordPress developer to build a professional, responsive, and user-friendly website for our resource blog, nsynapse.com. The ideal candidate will have extensive experience in WordPress development, theme customization, and plugin integration to create a high-quality platform that offers thought leadership in emerging tech, focusing on AI-blockchain synergy and FinTech consultancy. Project Overview: Website Type: Resource Blog (SEM/SEO) Design: Custom design based on brand guidelines (logo, colors, fonts, etc.) Pages Required: Home, About, Thought Leadership, Blog, Contact, Privacy Policy, Advertising Policy (if applicable), and any...
Role: Full-Stack Developer (JavaScript) Responsibilities: Design, develop, and maintain a web-based chatting application. Implement front-end UI/UX using frameworks like React.js or Vue.js. Develop server-side APIs and real-time communication with Node.js and Socket.IO. Set up and manage a robust database system (e.g., MongoDB, PostgreSQL, or Firebase). Ensure the app is scalable, secure, and performs well under high traffic. Integrate authentication features (e.g., OAuth, JWT). Conduct testing (unit, integration, and end-to-end) to ensure a bug-free experience. Skills Required: Front-End Development: Proficiency in HTML, CSS, and JavaScript. Experience with modern front-end frameworks (React, Angular, or Vue). Understanding of responsive design and UI/UX principles. Back-End Devel...
I'm looking for a skilled Full Stack Power Apps Studio Developer who can help me build a custom internal tool. This isn't just any simple application; it requires some advanced features. Key Requirements: - Proficient in developing in Power Apps - Capable of creating complex, custom applications - Experience with AI and object detection - Familiarity with integrating with camera systems The main function of this custom application will be utilizing AI for object detection via a camera. The ideal candidate will have a strong background in both Power Apps and AI, with a proven track record of developing intricate custom tools. Your expertise will be crucial in automating our business processes effectively.
Job Description: We are looking for an experienced and specialized mobile app developer to complete our augmented reality (AR) app. The app already has most of its features implemented, and we need an expert to fine-tune the location management using GPS, enhance security, and eventually create an iOS version of the app based on the Android build. Key Responsibilities: - Location Management Fixes: The app currently integrates GPS tracking, but we need your expertise to ensure the GPS-based location management is robust, accurate, and optimized for performance across different devices. - App Security: Implement additional security measures to ensure the app is secure, especially in handling user data and any sensitive information. - Android Completion: Complete any remaining wor...
I am working on a E-commerce project and need a skilled backend developer to assist with API integration. The project is already halfway completed, but I need help to integrate APIs effectively and ensure smooth functionality. This is a great opportunity to contribute to a project that showcases your expertise while helping me complete my personal project. Key Responsibilities: - Integrate both internal and third-party APIs into the existing backend architecture. - Work with our microservices to enhance the overall system performance. Essential Skills: - Proven experience in microservices. - Proficiency in NodeJS, ExpressJs, and RESTful APIs. - Experience with tools like Postman or equivalent for API testing. - Knowledge of database management, preferably MongoDB. Additional Qual...
I'm launching an E-commerce website and need a skilled PHP developer to assist with going live and adding some key features. Key Responsibilities: - Going live with the website - Implementing a 'Related Products' section - Add shipping gateway (fedex) Ideal Skills: - Strong proficiency in PHP - E-commerce website development experience - Ability to integrate with third-party services like shipping providers Please only apply if you have relevant experience and can deliver quality work in a timely manner.
Design + API integration. kotlin and java
I want a web based financial accounting application but low budget. Friends who do not know ERP or CRM should not bid. Budget is fixed On githup project or ready coding. I had problems with payment and project before. First the work, then the payment. 1. Node js and react software. Mongodb or postgresql 2. Superadmin, admin, personnel roles and permissions. 3. PDF modules. 4. If rewritten, I will give the design ready. () 5. - There will be 2 panels, Superadmin, admin 6. Is it possible to have a separate database for each member admin? 7. All work to be done will be discussed mutually.
I'm looking for junior programmers skilled in NextJS and Go to help develop a B2B web application with a MySQL database. Initially, you will be tasked with smaller tasks, but depending on your skills and performance, there will be opportunities to take on larger responsibilities. Key aspects of the project include: - Working on a document management system, which is the main functionality of the application. - Developing a web front-end to upload and visualize files, along with implementing features like version control, access permissions, and search functionality. - Helping to scale the application and its features as needed. Ideal candidates for this project should have: - Basic programming experience with NextJS and Go. - A willingness to learn and adapt. - A keen interest in de...
I'm looking for a developer experienced with Eclipse Theia to create a project navigator application based on a JSON feed tree. Key Features: - A detailed page with multiple tabs similar to Eclipse's development interface. - A tree navigator which displays JSON data. Right-clicking on a tree object brings up a context menu to draw a simple circular layout network diagram. - When a node of the diagram is clicked, the node's properties are shown in a property table and help information is displayed in a right pane. - The ability to print the diagram from a top menu print tool. - A three-pane layout consisting of a diagram pane, a detail information pane and a help pane. Data and Implementation: - The application will source its JSON feed from local files. - Th...
I'm looking for an experienced software developer to create a task management tool that operates on a web-based platform. Key Responsibilities: - Develop a comprehensive web-based task management tool - Ensure compatibility across various web browsers - Design user-specific interaction capabilities (Admin, Manager, Employee) Ideal Skills: - Proficiency in web-based software development - Previous experience in task management tool development - Strong understanding of user-based interface design The tool should be user-friendly, accommodating different user roles with appropriate access and functionalities. Your task will be to bring this project from concept to reality.
We are looking for an experienced Laravel developer to assist us in upgrading our existing system, resolving some critical bugs, and developing APIs for specific modules. Our platform plays a significant role in our operations, and we aim to enhance its performance and scalability. Key Responsibilities: Upgrade our existing Laravel-based system to the latest stable version. Fix identified bugs and improve overall system stability. Develop secure and efficient APIs for specific modules to enhance functionality and enable integration with other systems. Optimize application performance and database queries. Provide technical documentation for the APIs and updated system features. Requirements: Proven experience in Laravel framework development and upgrades....
I'm seeking an experienced WooCommerce developer to help fix some bugs on our website. A significant portion of this job will involve auditing the site's code. Key Tasks: - Fixing issues with website changes reverting to pre-change mode - Enhancing minor design elements at the HTML level, primarily focused on improving the site layout - Conducting a thorough audit of the site's overall performance This project requires a professional with a deep understanding of WooCommerce, a keen eye for design, and strong coding skills. The ideal candidate will be able to identify and rectify the issues with the stability of the code, ensuring the site functions smoothly and reliably.
I'm looking for a skilled Laravel developer to help enhance the backend of my application, specifically focusing on user authentication. Key Requirements: - Expertise in Laravel for backend development. - Experience with implementing and improving user authentication systems. - Knowledge of various authentication methods (email/password, social media login, etc.), even though the specific methods are not pre-defined for this project. - Ability to provide suggestions for enhancing security and user convenience. Please provide examples of previous backend projects you have worked on, particularly those involving user authentication.
I need a skilled PHP developer to help create a new screen for my application. This screen will have specific functionalities and will be crucial to our project. Key Requirements: - The screen will primarily display product details. So, a good understanding of how to present this information clearly and effectively is essential. - The screen will need to read data from an existing database. Experience with database interaction, particularly with reading data, is a must. Ideal Skills: - Proficient in PHP - Experience with creating user interfaces - Database management skills - Ability to present data in an accessible manner Please note, the main purpose of this screen is currently unspecified. Your creativity and expertise will be key in developing its functionality.
We are looking to hire an experienced developer to create a custom Software Development Kit (SDK) specifically for PDF annotation, built using Angular. The SDK will enable users to annotate, highlight, draw, and comment on PDFs, providing essential features such as text markup, freehand drawing, shapes, sticky notes, and more. It will be designed for easy integration into web applications with a focus on performance, stability, and a smooth user experience. Key Responsibilities: Develop an Angular-based SDK for PDF annotation tools, ensuring seamless integration with web applications. Implement annotation features such as text highlighting, underlining, freehand drawing, shapes (circles, rectangles), and sticky notes. Ensure the SDK is capable of handling large PDF files efficientl...
I'm in need of a seasoned developer with expertise in React, Node, and Flutter. My project is a dual-platform initiative encompassing both a web and mobile application. Key Features: - User Authentication: The application will require a secure and efficient user login system. - Real-time Updates: This app will have elements that need instantaneous updates, so experience with WebSockets or similar technologies is a plus. - Payment Processing: A portion of the app will deal with transactions, thus a solid understanding of integrating payment gateways is essential. The mobile application will need to be compatible with both iOS and Android platforms. Experience with cross-platform development is a strong advantage. Please provide examples of previous work that align with ...
ONLY FOR INDEPENDENT DEVELOPER - NO AGENCY We are developing a VR Training module as per the details attached "project details" (PDF) Please go through in details and reach out with a step by step technical approach how you would develop this. Kindly note – Anything as in front end that we would develop, we just need back-end architecture to be built in synch with local servers.
I'm in need of a professional resume tailored for a senior-level full-stack developer. The resume should be optimized for Applicant Tracking Systems (ATS) and emphasize my expertise in .NET. Key requirements: - Highlight my full-stack development experience. - Focus on senior-level capabilities and contributions. - Emphasize .NET skills and experience. Ideal candidates will have: - Extensive experience in software development, particularly full-stack. - A strong understanding of ATS and how to optimize a resume for it. - Expertise in .NET, with the ability to portray this in a compelling manner. Please include examples of ATS-friendly resumes you've created in the past, particularly for senior-level software developers.
Job Title: AI App Developer (Azure DevOps with AI Application API running on Azure App Serve with docker image) Location: [Remote] Employment Type: [Freelance] Job Description We are looking for an experienced AI App Developer to build, deploy, and manage AI-powered applications using our in-house AI services. The role will involve creating scalable, secure, and efficient applications on Kubernetes while ensuring seamless performance and integration. Key Responsibilities Design and develop AI-driven applications using our proprietary AI services. Deploy and manage applications on Kubernetes, ensuring high availability and scalability. Integrate in-house AI models and services via APIs for optimal performance. Work with DevOps teams to streamline CI/CD pipelines f...
Mandatory Skills: C# - 3 yrs Total Years Of exp: 3+ years experience Opportunity: Full Time Contract, 8 hours Notice Period: immedaite LLM C# Developer About Role A U.S.-based company that is committed to creating innovative tools for automation and coding is looking for C# developer. The selected candidate will be responsible for writing effective, high-quality C# code to validate the efficiency of their LLM. The company's goal is to completely transform the way engineers interact with code, resulting in more efficient and intuitive work. Job Responsibilities: Review the code / solutions generated by an AI system, ensuring adherence to quality standards and best practices Organize the development cycle, effectively manage project priorities, and specify goals and...
We are looking for an experienced developer to create an automated Twitter page and a complementary website that tracks whale movements in meme coins and trending tokens on platforms like Dex Screener. The Twitter page should function similarly to Whale Watch Alert () , providing real-time updates and insights into token activity. The website will serve as a centralized hub for further analytics and details. Responsibilities: 1. Develop and automate a Twitter page to track whale movements and token trends. 2. Integrate data from platforms like Dex Screener for real-time updates. 3. Design and build a website to complement the Twitter page, featuring additional analytics and tracking tools. 4. Ensure both the Twitter page and website are reliable, scalable, and
A freelancer job description typically outlines the services a freelancer offers, their process, and their value to clients. Freelancers are self-employed individuals who work for multiple clients on a project-by-project or monthly retainer basis. Services offered The type of work the freelancer specializes in, The value the freelancer brings to clients, The deliverables the freelancer provides, and Any unique selling points. Process How the freelancer works and The freelancer's process for completing tasks. Value to clients How the freelancer can help clients The emotional support and companionship the freelancer can provide How the freelancer can help with mobility and transportation How the freelancer can hel...
My website that I bought a long time ago won't start, and when I type npm start, it gives me a lot of errors. I attached the source code of the website; first, check if you can fix these issues, and then submit the application.
EUWEB 250120 - E-commerce WordPress Developer/Admin 10 Half/Day each month (1 to 4 month, where/when like), ...BDG <30€ each month for 10 Half/Day (plz, no waste time); ...plz, if like work for us (as WordPress Developer/Admin, which we need), ...need your URL/Test; ...as make a draft web HomePage by this guide $$$_NFT_TEST/ ; ...plz, if yes, send us your URL (with easy contents/draft on our guide or your "with similar contents"); ...the links inside guide give you many references to the project, current status and above all to examples of LandingPage (a lot all very similar, with 3 menus and PresentationSpace that presents our GREEN themes or patents); ..."JOBPOST" ask availability to work for our GREEN project; ...our team browse/check
I am looking for a dedicated Junior Developer with a strong focus on front-end development, particularly with Angular, TypeScript, and JavaScript. Your main responsibilities will include implementing responsive design, creating interactive elements, and optimizing performance. You will be working with detailed design guidelines, so a keen eye for detail and adherence to specifications is essential. Ideal Skills: - Proficiency in Angular, TypeScript, JavaScript - Experience with responsive design and performance optimization - Familiarity with working from detailed design guidelines Please provide examples of your previous front-end work, particularly if it includes Angular projects.
I need a mid-level C# and .NET developer to help in the development of a web-based content management system (CMS). support for existing legacy applications - 20 hours per week minimum Support for an additional utility for the same The developer is ideally based in Australia for ease of management, but definitely needs to operate during at least half of the Australian business day Key Responsibilities: - Collaborate with me to design and implement the platform. - Write clean, scalable code with C# and .NET. - Perform code reviews and unit testing. Ideal Skills and Experience: - Strong knowledge of C# and .NET. - Previous experience in developing web applications. - Familiarity with content management systems is a plus. - Good communication skills and team player.
Seeking an exceptional AI Developer to help build the future of creative business automation. We're creating sophisticated AI agents that will enable the 3-Hour Workday reality for creative entrepreneurs. This is a long-term contract role with significant growth potential.
I'm seeking a seasoned Flutter Developer with a minimum of 2 years in mobile app development using Flutter and over 5 years of overall experience. The task at hand is to develop and deliver a musical games app with specific features within a tight 3 to 4 weeks deadline. This is a full-time hybrid role, offering flexibility to work both in the Hyderabad office and remotely. Key Responsibilities: - Develop and maintain a native mobile application using the Flutter framework. - Implement specific app features such as leaderboards, MIDI reading and writing, and audio effects. - Ensure the app is ready for full functionality with in-app purchases and multiplayer mode. Qualifications: - Minimum 2 years of experience in mobile app development using Flutter and overall 5+ years exper...
I'm in need of a PHP Laravel expert who can dedicate 12-15 hours a week at 4 AUD per hour. The main tasks will involve fixing and building SaaS websites. Key Responsibilities: - Backend development and API integration - Bug fixing and website maintenance - Building new SaaS websites from scratch SaaS Specifics: - Implementing user authentication and management systems - Developing a subscription and billing system - Creating an analytics dashboard Ideal Skills: - Extensive experience with PHP and Laravel - Previous work with SaaS websites - Strong backend development skills - Proficient in API integration and bug fixing - Experience with user management systems, subscription and billing systems, and analytics dashboards. The candidate should be able to work independently, have a k...
I am looking for a skilled C# programmer / reverse engineer / game developer to help recreate a DLL file (and exe if necessary) used to run a bot program for an mainstream desktop RPG video game as the original code has been lost over time. The ideal candidate will have strong expertise in C#, experience with DLL development and familiar with reverse engineering games and a basic knowledge of how RPG games work. Your task will involve analyzing the existing DLL and creating a new version that maintains functionality. There are also other programs that the bot must communicate with to make it function properly. It is not as straight forward as it may seem. We are looking for a candidate with the following characteristics: extensive experience in reverse engineering games, worked on...
I'm seeking a talented web developer with a strong background in WordPress and web design to create several lead generation and service detail landing pages in line with my existing website branding. Additionally, I want to enhance some of my current Services page, which I'm not satisfied with. Key Responsibilities: - Create engaging, high-functionality, SEO-friendly landing pages - Improve the Services page to meet high design standards - Ensure all pages align with current site branding Specific Requirements: - Implement interactive elements, social media integration, and contact forms on the landing pages - Integrate Zoho CRM for the contact forms Ideal Skills: - Extensive experience in WordPress development - Strong web design and SEO skills - Proficient in CRM in...
Job Description: We are seeking a talented Freelance Go Developer to build a robust application that enables casting content from mobile devices to TVs over a network. The ideal candidate will have a strong understanding of Go programming, networking protocols (especially SSDP), and a passion for creating seamless user experiences. Responsibilities: Develop a Go application to discover TVs on the network using SSDP. Implement a reliable mechanism to stream content (video, audio, images) from mobile devices to discovered TVs. Ensure compatibility across different network environments (e.g., , ). Optimize the application for performance and resource utilization. Maintain code quality and adhere to best practices. Requirements: Solid understanding of networking concepts
I'm looking for a skilled WordPress developer to revamp my homepage with a focus on enhancing user experience. The project will involve implementing a Figma file with a specific layout and design, as well as interactive elements, animations, and transitions. Key Requirements: - Proficiency in WordPress - Experience implementing Figma designs - Understanding of user experience principles - Ability to work with interactive elements and animations Please provide examples of previous WordPress projects and Figma implementations in your bid. Figma file below: Website to be implemented on: https://richmondau
I am looking for a skilled VB.NET developer to assist in resolving issues (now and ongoing) that we are trying to send live. You need vb.net skills and experience with ms office object model though vb.net we also need an installer so we can push updates to clients. Key Requirements: - Develop a VB.NET application that can scan and read content from Excel and Word documents. - Implement functionality for the app to interpret different types of content such as text, tables, and charts. Ideal Skills: - Proficiency in VB.NET - Experience in developing applications for document scanning and reading - Familiarity with Excel and Word document structures -installer creation.
I am looking for flutter developer, who can do one meeting with us and directly start the work.
EUWEB 250120 - E-commerce WordPress Developer/Admin 10 Half/Day each month (1 to 4 month, where/when like), ...BDG <30€ each month; ...plz, if like work for us (as WordPress Developer/Admin, which we need), ...need your URL/Test; ...as make a draft web HomePage by this guide $$$_NFT_TEST/ ; ...plz, if yes, send us your URL (with easy contents/draft on our guide or your "with similar contents"); ...the links inside guide give you many references to the project, current status and above all to examples of LandingPage (a lot all very similar, with 3 menus and PresentationSpace that presents our GREEN themes or patents); ..."JOBPOST" ask availability to work for our GREEN project; ...our team browse/check here (speak only Italian, read/write
I want a web based financial accounting application but low budget. Friends who do not know ERP or CRM should not bid. Budget is fixed On githup project or ready coding. I had problems with payment and project before. First the work, then the payment. 1. Node js and react software. Mongodb or postgresql 2. Superadmin, admin, personnel roles and permissions. 3. PDF modules. 4. If rewritten, I will give the design ready. () 5. - There will be 2 panels, Superadmin, admin 6. Is it possible to have a separate database for each member admin? 7. All work to be done will be discussed mutually.
I'm looking for a skilled WIX developer to help me create two websites for my pulp-based products. These sites should integrate an e-commerce store, a product showcase, and a blog section. Requirements: - E-commerce store: The site should facilitate smooth online transactions and provide a user-friendly shopping experience. - Product Showcase: I need an appealing layout to display our pulp-based products effectively. - Blog Section: A space for us to share updates, insights, and engage with our customers. Design: I need assistance in creating a design from scratch. Your input will be invaluable in achieving a visually pleasing and functional layout. Content: I have some content ready, but will need your assistance with content creation for the sites. Ideal Skills: - Prof...
I'm looking for a proficient React Native developer to create a dynamic mobile app for both iOS and Android. The application will primarily deal with user-generated content and requires integration of social media logins for user authentication. Key features include push notifications and in-app purchases. Ideal Skills and Experience: - Proficient in React Native and mobile app development. - Extensive experience with iOS and Android platforms. - Able to integrate APIs and work with external libraries. - Strong understanding of responsive design principles. - Demonstrable experience of implementing social media logins. - Prior work on apps dealing with user-generated content. Deliverables: - A fully functional and thoroughly tested mobile application. - A clean, well-document...
