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Alexander S, Front-end developer

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Last Updated: 4 Jul 2023

- 8+ years of commercial experience in IT - Experience in developing web applications using Vue.JS (Vuex, Vuetify) - Intermediate English - Good logical thinking, high level of responsibility. Communicative, responsible, hardworking, result-oriented, and team player - Available ASAP

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Last Updated: 4 Jul 2023

- IT experience starting in 2017. - Experience with the full lifecycle of designing, developing, installing, configuring, and maintaining applications on SharePoint 2007/2010/2013/2016/2019 Online. - Strong knowledge of LUA, C, C ++, C#, Python, Java, HTML (HTML5), JavaScript, CSS (CSS3). - Experience with TypeScript, jQuery, Bootstrap (3, 4), Data Tables, SharePoint libs, ReactJS, Vue.js, Semantic UI, ADO NET, Data fixes, Code review, Impact analysis, Quality Managment Systems (Based on ISO 9001:20155 and ISO 19011:2011 Standarts) - Extensive experience with MS Visual Studio 2012/2013/2015/2017/2019, VS Code, Jira, Git, Microservices, Doker, Database and Data modeling, SQL DB, MongoDB. - Fluent English - Available ASAP

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- 5+ years of experience in IT - Upper-intermediate English - Available ASAP

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Artem V., .NET Software Engineer

Budva, Montenegro
Last Updated: 4 Jul 2023

- Over 10 years of professional expertise in the Information Technologies (IT) industry - Experience in the design and implementation of web applications - Rich experience in web development - Upper-Intermediate English - Available from 15.07.2022

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Our journey starts with a 30-minute discovery call to explore your project challenges, technical needs, and team diversity. Meet Carefully Matched KnockoutJS Talents. Within 1-3 days, we’ll share profiles and connect you with the right talents for your project. Schedule a call to meet engineers in person. Validate Your Choice. Bring a new KnockoutJS developer on board with a trial period to confirm that you’ve hired the right one. There are no termination fees or hidden costs.

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Upstaff Managers conduct an introductory round with potential candidates to assess their soft skills. Additionally, the talent’s hard skills are evaluated through testing or verification by a qualified developer during a technical interview. The Upstaff Staffing Platform stores data on past and present KnockoutJS candidates. Upstaff managers also assess talent and facilitate rapid work and scalability, offering clients valuable insights into their talent pipeline. Additionally, we have a matching system within the platform that operates in real-time, facilitating efficient pairing of candidates with suitable positions.

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Table of Contents

Soft skills of a KnockoutJS Developer

Soft skills are essential for a KnockoutJS Developer as they contribute to effective collaboration, communication, and problem-solving abilities. Here are the soft skills required at different levels of expertise:


  • Adaptability: Ability to quickly learn and adapt to new technologies and frameworks.
  • Teamwork: Collaborating effectively with team members to achieve project goals.
  • Time Management: Efficiently managing tasks and meeting deadlines.
  • Communication: Clear and concise communication to convey ideas and requirements.
  • Attention to Detail: Paying close attention to small details to ensure the quality of code.


  • Problem Solving: Analyzing complex issues and finding practical solutions.
  • Leadership: Taking ownership of tasks and guiding junior developers.
  • Critical Thinking: Evaluating different approaches and making informed decisions.
  • Collaboration: Working seamlessly with cross-functional teams.
  • Time Management: Prioritizing tasks effectively and optimizing productivity.
  • Adaptability: Adapting to changing project requirements and technologies.
  • Communication: Effectively articulating ideas and concepts to stakeholders.


  • Mentorship: Mentoring and coaching junior and mid-level developers.
  • Strategic Thinking: Identifying long-term goals and planning accordingly.
  • Innovation: Bringing innovative ideas and approaches to the development process.
  • Decision Making: Making informed decisions considering various factors.
  • Conflict Resolution: Resolving conflicts and fostering a positive work environment.
  • Project Management: Overseeing the execution of projects and ensuring their success.
  • Communication: Effectively communicating with stakeholders and clients.
  • Adaptability: Adapting to rapidly changing technologies and market trends.

Expert/Team Lead

  • Strategic Planning: Developing long-term strategies for project success.
  • Team Management: Managing and leading a team of developers effectively.
  • Collaboration: Building strong relationships with clients and stakeholders.
  • Negotiation: Negotiating project requirements and contracts.
  • Decision Making: Making critical decisions that impact the project’s success.
  • Innovation: Driving innovation and staying ahead of industry trends.
  • Technical Leadership: Providing technical guidance and mentoring to the team.
  • Problem Solving: Resolving complex technical challenges efficiently.
  • Communication: Influencing and persuading stakeholders effectively.
  • Time Management: Ensuring timely delivery of projects within budget.
  • Continuous Learning: Staying updated with the latest technologies and best practices.

Cases when KnockoutJS does not work

  1. Unsupported Browsers: KnockoutJS relies on modern web technologies such as JavaScript, HTML5, and CSS3. Therefore, it may not work properly or at all in older browsers that lack support for these technologies. For example, Internet Explorer 6 and 7 have limited or no support for the necessary features, making KnockoutJS incompatible with them.
  2. JavaScript Disabled: KnockoutJS heavily relies on JavaScript to function properly. If a user has JavaScript disabled in their browser, KnockoutJS will not be able to execute its code and provide the expected functionality. As a result, any dynamic data binding and UI updates will not work.
  3. Incorrect Integration: KnockoutJS requires proper integration within the web application. If the integration is not done correctly or if there are conflicts with other JavaScript libraries or frameworks, it may lead to unexpected behavior or outright failure of KnockoutJS. Care should be taken to ensure that KnockoutJS is integrated properly with the application’s existing codebase.
  4. Large and Complex Applications: While KnockoutJS is well-suited for building small to medium-sized applications, it may face performance issues in large and complex applications. As the number of data-bindings and computed observables increases, the performance of KnockoutJS may degrade. In such cases, alternative solutions or optimizations may be required to maintain a smooth user experience.
  5. Security Restrictions: In certain cases, security restrictions imposed by the browser or server may prevent KnockoutJS from functioning as expected. For example, if the browser restricts access to certain APIs or if the server blocks certain requests required by KnockoutJS, it can hinder its functionality.

How and where is KnockoutJS used?

Case NameCase Description
Dynamic User InterfacesKnockoutJS is ideal for creating dynamic user interfaces that respond to user actions in real-time. It allows developers to build interactive web applications with smooth and responsive UIs. By utilizing KnockoutJS’s two-way data binding feature, changes made by the user in the UI are automatically reflected in the underlying data model, and vice versa. This makes it easier to build complex UI components and keep the data and UI in sync.
Form ValidationKnockoutJS simplifies form validation by providing a declarative way to define validation rules for form fields. Developers can specify validation rules such as required fields, minimum and maximum lengths, numeric values, and more. KnockoutJS automatically validates the form based on these rules and provides feedback to the user in real-time. This helps to ensure data integrity and improve the user experience by preventing invalid form submissions.
Single Page Applications (SPAs)KnockoutJS is widely used for building single page applications (SPAs) where all the necessary resources are loaded once and subsequent interactions with the application are handled dynamically without requiring page reloads. KnockoutJS’s lightweight architecture and efficient data binding capabilities make it well-suited for creating SPAs that deliver a seamless and responsive user experience.
Real-Time CollaborationWith KnockoutJS’s real-time data binding capabilities, developers can easily build collaborative applications that allow multiple users to work together on shared data in real-time. Any changes made by one user are automatically propagated to other users’ interfaces, ensuring everyone stays up to date. This is particularly useful for applications such as collaborative document editors, project management tools, and chat applications.
Dynamic Filtering and SortingKnockoutJS provides powerful tools for implementing dynamic filtering and sorting functionality in web applications. Developers can easily bind UI elements such as dropdowns, checkboxes, and text inputs to filter and sort data displayed on the page. Users can interactively apply filters and sort orders, and the UI updates in real-time to reflect the changes. This enables users to efficiently explore and analyze large datasets without the need for page reloads.
Complex Data ManipulationFor applications that involve complex data manipulation, KnockoutJS simplifies the process by providing a rich set of features such as computed observables and dependency tracking. Computed observables allow developers to define derived values that automatically update whenever the underlying data changes. This is particularly useful for performing calculations, aggregations, and transformations on data. Additionally, KnockoutJS’s dependency tracking mechanism ensures that computed observables are updated only when their dependencies change, improving performance and efficiency.

Let’s consider Difference between Junior, Middle, Senior, Expert/Team Lead developer roles.

Seniority NameYears of experienceResponsibilities and activitiesAverage salary (USD/year)
Junior Developer0-2 yearsAssist in coding, testing, and debugging software applications. Collaborate with senior developers to learn and improve skills. Participate in code reviews and contribute ideas to improve software quality.$50,000 – $70,000
Middle Developer2-5 yearsDevelop and maintain software applications, including coding, testing, and debugging. Collaborate with cross-functional teams to define project requirements and deliver high-quality software solutions. Mentor junior developers and provide guidance and support.$70,000 – $90,000
Senior Developer5-10 yearsLead the development of complex software projects, including designing architecture, writing code, and overseeing testing and deployment. Provide technical guidance and mentorship to junior and middle developers. Collaborate with stakeholders to define project goals and ensure successful delivery.$90,000 – $120,000
Expert/Team Lead Developer10+ yearsLead and manage a team of developers, including assigning tasks, providing technical guidance, and overseeing project timelines and deliverables. Drive technical excellence and innovation within the team. Collaborate with stakeholders to define project strategies and ensure alignment with business objectives.$120,000 – $150,000+

TOP 10 Facts about KnockoutJS

  • KnockoutJS is a lightweight JavaScript framework that allows developers to build dynamic and responsive user interfaces.
  • It follows the Model-View-ViewModel (MVVM) architectural pattern, which separates the user interface logic from the business logic and data model.
  • KnockoutJS provides a simple and declarative way to bind HTML elements to data models, automatically keeping them in sync.
  • One of the key features of KnockoutJS is its powerful two-way data binding, which means that changes in the user interface automatically update the underlying data model and vice versa.
  • KnockoutJS has a built-in dependency tracking system that automatically updates the user interface whenever the underlying data changes, eliminating the need for manual DOM manipulation.
  • It supports a wide range of observable objects, including simple values, arrays, and even complex nested objects.
  • KnockoutJS provides a rich set of utility functions and extensions, such as computed observables, which allow developers to create complex, derived values based on the underlying data.
  • It offers seamless integration with other JavaScript libraries and frameworks, making it easy to incorporate KnockoutJS into existing projects.
  • KnockoutJS is compatible with all major web browsers and has a small file size, making it ideal for performance-critical applications.
  • It has a vibrant and active community of developers, providing extensive documentation, tutorials, and support resources to help developers get started and excel in using KnockoutJS.

Hard skills of a KnockoutJS Developer

KnockoutJS is a powerful JavaScript library that allows developers to create dynamic and responsive user interfaces. To excel in this technology, a KnockoutJS Developer needs to possess a strong set of hard skills that enable them to effectively build and maintain applications using this framework.


  • Understanding of JavaScript and jQuery: Proficiency in JavaScript and jQuery is essential for a Junior KnockoutJS Developer as it forms the foundation for working with KnockoutJS.
  • Knowledge of HTML and CSS: Junior developers should have a good grasp of HTML and CSS to create well-structured and visually appealing user interfaces.
  • Experience with KnockoutJS: Familiarity with the basic concepts of KnockoutJS, such as observables, bindings, and view models, is necessary for a Junior Developer.
  • Debugging and Troubleshooting: Junior developers should be able to identify and fix common bugs and issues that may arise while working with KnockoutJS.
  • Collaboration and Teamwork: Junior developers should be able to work well within a team and effectively communicate their ideas and progress.


  • Advanced KnockoutJS Concepts: A Middle KnockoutJS Developer should have a deep understanding of advanced concepts like custom bindings, computed observables, and templating.
  • Back-end Integration: Knowledge of integrating KnockoutJS with server-side technologies like ASP.NET or Node.js is essential for building robust applications.
  • Optimization and Performance: Middle developers should be able to optimize the performance of KnockoutJS applications by minimizing DOM manipulation and improving data binding efficiency.
  • Testing: Familiarity with testing frameworks like Jasmine or Mocha to write unit tests for KnockoutJS code ensures the quality and reliability of applications.
  • Version Control: Proficiency with version control systems like Git enables Middle developers to effectively collaborate and manage codebase changes.
  • Problem-Solving: Middle developers should have strong problem-solving skills to address complex challenges and implement efficient solutions.
  • Code Documentation: Middle developers should be able to document their code effectively to facilitate maintenance and future enhancements.


  • Architectural Design: Senior KnockoutJS Developers should have a deep understanding of software architecture principles and be able to design scalable and maintainable applications.
  • Performance Optimization: Senior developers should have extensive experience in optimizing the performance of KnockoutJS applications, including advanced techniques like lazy loading and caching.
  • Code Review and Mentoring: Senior developers should be able to review code and provide constructive feedback to other team members, as well as mentor and guide junior developers.
  • Integration with APIs: Knowledge of integrating KnockoutJS applications with RESTful APIs or other web services is crucial for building robust and interconnected systems.
  • Security: Senior developers should be well-versed in implementing secure practices in KnockoutJS applications, such as input validation and protection against common vulnerabilities.
  • Continuous Integration and Deployment: Familiarity with CI/CD pipelines and tools like Jenkins or GitLab enables Senior developers to automate the build, test, and deployment processes.
  • Performance Monitoring: Senior developers should be able to monitor and analyze the performance of KnockoutJS applications using tools like New Relic or Google Analytics.
  • Technical Leadership: Senior developers should demonstrate strong leadership skills and be capable of guiding the technical direction of projects and mentoring other team members.

Expert/Team Lead

  • Advanced KnockoutJS Customizations: Experts have an in-depth understanding of KnockoutJS internals and can customize the framework to suit specific project requirements.
  • Cross-platform Development: Experts can leverage technologies like Cordova or React Native to build cross-platform mobile applications using KnockoutJS.
  • Performance Tuning and Optimization: Experts excel in optimizing the performance of complex and resource-intensive KnockoutJS applications.
  • Code Refactoring and Modernization: Experts can refactor legacy codebases to adhere to modern coding practices and improve maintainability.
  • Architecture Assessment and Planning: Experts can assess existing application architectures and devise strategies for enhancing scalability, performance, and maintainability.
  • Technical Documentation and Knowledge Sharing: Experts excel in documenting technical specifications, guidelines, and best practices, and actively share their knowledge with the team.
  • Performance and Load Testing: Experts can conduct thorough performance and load testing to identify bottlenecks and optimize the performance of KnockoutJS applications.
  • Client Relationship Management: Team Leads have strong interpersonal skills and can effectively communicate with clients to understand their requirements and provide technical guidance.
  • Project Management and Planning: Team Leads excel in managing projects, setting priorities, and coordinating the efforts of the development team.
  • Continuous Learning and Skill Development: Experts and Team Leads actively stay updated with the latest advancements in KnockoutJS and related technologies to ensure the team’s technical excellence.
  • Team Collaboration and Leadership: Experts and Team Leads foster a collaborative and inclusive team culture, promoting knowledge sharing and mentoring junior team members.

Pros & cons of KnockoutJS

6 Pros of KnockoutJS

  • Easy two-way data binding: KnockoutJS simplifies data binding between the UI and the underlying data model, allowing developers to easily update the UI in response to changes in the data model and vice versa.
  • Declarative bindings: KnockoutJS uses declarative bindings, which means developers can specify the relationship between UI elements and data properties in a clear and concise manner, reducing the amount of code required.
  • Automatic UI updates: With KnockoutJS, developers don’t need to manually update the UI when the data changes. The framework automatically updates the UI elements bound to the data properties, saving time and effort.
  • Dependency tracking: KnockoutJS tracks dependencies between different data properties, ensuring that any changes in one property automatically update the dependent properties. This feature simplifies complex data relationships and helps maintain data consistency.
  • Modular and extensible: KnockoutJS allows developers to create modular and reusable components, making it easier to organize and maintain large-scale applications. The framework also supports custom bindings, enabling developers to extend its functionality as needed.
  • Active community and resources: KnockoutJS has a dedicated and active community of developers, providing support, resources, and plugins. This community-driven aspect ensures that developers can find solutions to common problems and stay up-to-date with the latest developments.

6 Cons of KnockoutJS

  • Steep learning curve: KnockoutJS has a learning curve, especially for developers who are new to MVVM (Model-View-ViewModel) frameworks. Understanding concepts such as observables, bindings, and computed properties may require some initial effort.
  • Limited scalability: While KnockoutJS is suitable for small to medium-sized applications, it may face scalability challenges in larger projects. The framework lacks some advanced features and optimizations found in other frameworks like React or Angular.
  • Debugging complexity: Debugging KnockoutJS applications can be challenging, especially when dealing with complex data bindings and dependencies. Understanding how data flows through the application and identifying issues can require additional time and effort.
  • Browser support: KnockoutJS may have limited support for older browsers, as it relies on modern web technologies such as ECMAScript 5. However, with the declining usage of older browsers, this limitation may be less significant for many projects.
  • Less vibrant ecosystem: While KnockoutJS has an active community, it may not have the same level of ecosystem and third-party library support as some other popular frameworks. This may require developers to implement certain features or functionality from scratch.
  • Not actively maintained: KnockoutJS is a mature framework that has reached a stable state, but it may not receive frequent updates or new features compared to other frameworks. This could potentially impact its compatibility with future web technologies.

TOP 10 Tech facts and history of creation and versions about KnockoutJS Development

  • KnockoutJS is a JavaScript library that follows the Model-View-ViewModel (MVVM) architectural pattern.
  • It was created in 2010 by Steve Sanderson while working at Microsoft.
  • KnockoutJS provides a simple and declarative way to bind data to HTML elements, allowing for automatic UI updates.
  • The first version of KnockoutJS was released in August 2010, and it quickly gained popularity among web developers.
  • One of the groundbreaking features of KnockoutJS is its dependency tracking system, which automatically updates the UI whenever the underlying data changes.
  • KnockoutJS also introduced the concept of observables, which are special JavaScript objects that automatically notify subscribers when their value changes.
  • In 2012, KnockoutJS version 2.0 was released, introducing new features like custom bindings and template engines.
  • KnockoutJS version 3.0, released in 2013, improved performance and added support for the Web Components specification.
  • KnockoutJS has a vibrant community with numerous plugins and extensions available for added functionality.
  • As of 2021, KnockoutJS is still actively maintained and used by developers around the world.

What are top KnockoutJS instruments and tools?

  • Knockout.js: Knockout.js is a JavaScript library that helps you to create rich, responsive display and editor user interfaces with a clean underlying data model. It was created by Steven Sanderson and first released in 2010. Knockout.js follows the Model-View-ViewModel (MVVM) architectural pattern and is designed to work seamlessly with any web framework. It has gained popularity due to its simplicity and ability to handle complex data-binding scenarios.
  • ko.js: ko.js is a lightweight alternative to Knockout.js. It is a stripped-down version of Knockout.js that focuses solely on data-binding and doesn’t include other features like templating and component system. It is designed for projects where simplicity and performance are paramount.
  • Knockout Mapping Plugin: The Knockout Mapping Plugin is an extension to Knockout.js that simplifies the process of mapping JavaScript objects to observables. It provides a convenient way to automatically create observables and update them when the underlying object changes. This plugin is widely used in projects where complex object mapping is required.
  • Knockout Validation: Knockout Validation is a plugin that adds validation capabilities to Knockout.js. It provides a set of declarative validation rules that can be applied to observables, allowing you to easily validate user input and provide feedback. This plugin is commonly used in form-heavy applications.
  • Knockout-ES5: Knockout-ES5 is a plugin that enables the use of ES5 property getters and setters with Knockout.js. It allows you to define computed observables using ES5 syntax, making your code more concise and readable. This plugin is especially useful for projects that heavily rely on computed observables.
  • Knockout-Paging: Knockout-Paging is a plugin that provides paging functionality for Knockout.js. It allows you to split large data sets into smaller pages and provides navigation controls for easy browsing. This plugin is commonly used in applications that deal with large amounts of data.
  • Knockout-Validation-Localization: Knockout-Validation-Localization is a plugin that provides localization support for Knockout Validation. It allows you to easily localize validation error messages and customize the validation behavior based on the user’s locale. This plugin is useful for projects that target international audiences.

TOP 10 KnockoutJS Related Technologies

  • JavaScript

    JavaScript is the fundamental programming language for KnockoutJS development. It is a versatile and widely-used language that allows developers to create interactive and dynamic web applications.

  • KnockoutJS

    KnockoutJS is a popular JavaScript framework designed for building dynamic and responsive user interfaces. It provides a declarative way to bind data to the UI, making it easier to manage and manipulate data in real-time.

  • HTML

    HTML (Hypertext Markup Language) is the standard markup language for creating web pages. It is essential for KnockoutJS development as it provides the structure and elements necessary for building the user interface.

  • CSS

    CSS (Cascading Style Sheets) is a styling language used to control the presentation and layout of web pages. It is crucial for creating visually appealing and consistent designs in KnockoutJS applications.

  • jQuery

    jQuery is a fast and feature-rich JavaScript library that simplifies HTML document traversal, event handling, and animation. It is often used in combination with KnockoutJS to enhance the functionality and interactivity of web applications.

  • Bootstrap

    Bootstrap is a popular front-end framework that provides a collection of CSS and JavaScript components for building responsive web applications. It offers a grid system, pre-designed UI elements, and responsive utilities, making it easier to create visually appealing KnockoutJS interfaces.

  • Webpack

    Webpack is a module bundler for JavaScript applications. It allows developers to bundle and optimize their KnockoutJS code, manage dependencies, and improve performance by reducing the number of network requests made by the application.

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