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Irina R., Full-Stack Software Engineer (Node.js + React)

Schiedam, Netherlands
Last Updated: 4 Jul 2023

- 3+ years of professional experience using front-end and back-end technologies - Front-end: JavaScript(ES6), React, Redux, Redux-saga, Context API, React Hooks, Vue js, Vuex, Angular, HTML, CSS(SCSS), MaterialUI, AntDesign - Back-end: NodeJS (Express, NestJS), REST API, Docker - Solid experience in building rich web applications (monolith and MSA) using frameworks and libraries such as React, NestJs, Express, and Vue js. - Intermediate English - Available in 1 week after approval for the project

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Denis T., Full-Stack Software Engineer (Node.js + React)

Last Updated: 7 Feb 2024

- 5+ years of professional experience using front-end and back-end technologies - Solid experience in building rich web applications (monolith and MSA) using frameworks and libraries such as React, NestJs, Express - Most of the development experience was gained in projects related to business corporate networks, coaching platforms, insurance, fintech, leasing, and event-management systems - Front-end: JavaScript(ES6), React, Redux, Next.js, Redux-saga, Context API, React Hooks, Chartjs, HTML, CSS(SCSS), MaterialUI, AntDesign, Tensorflow - Back-end: NodeJS (Express, NestJS), REST API, Docker, Terraform - Upper-Intermediate English

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Mykyta K., Full-stack Software Engineer (React + Node.js)

Lviv, Ukraine
Last Updated: 4 Jul 2023

- 5+ years of professional experience using front-end and back-end technologies - Front-end: Deep knowledge of native JavaScript (basics, OOP, DOM, events, asynchrony, AJAX, event loop), ES6+, React, Redux, other React tools (React-router, Redux-Saga, etc.), HTML5, CSS3, LESS, SASS, Bootstrap, Material-UI. - Back-end: Node.js, Express.js, NestJS, JWT, REST API, GraphQL, Postgres, Sequelize, Typeorm, knex.js, Docker, Microservices. - Upper-Intermediate English - Available in 2 weeks after approval for the project

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Mike A., Front-End (React) Software Engineer

Kharkiv, Ukraine
Last Updated: 4 Jul 2023

- 8+ years of experience with JavaScript (React, Node.js); - React, Redux and TypeScript for front-end and NodeJS (NestJS, Express, SocketIO, TCP Sockets) for back-end; - Upper-intermediate English; - Available ASAP

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Victoria R., Mobile/Frontend Javascript Engineer

Dnipro, Ukraine
Last Updated: 4 Jul 2023

- Mobile/Frontend Javascript Engineer with 5 years of experience in the IT industry - 3 years of experience creating mobile applications using React Native - Deep knowledge of JavaScript, ES6+, React, React Native, Redux, other React tools (Redux-Thunk, React-query, etc.), Material-UI, HTML5, CSS3, BEM, LESS, SASS, Bootstrap, Webpack, Vite, Jest, Lodash, Docker, Google, Facebook auth - Upper-Intermediate English - Available ASAP

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Table of Contents

TOP 12 Facts about Redux-Saga

  • Redux-Saga is a middleware library for managing side effects in Redux applications.
  • It was inspired by the concept of generators, which are functions that can be paused and resumed.
  • Redux-Saga uses a declarative approach to handle asynchronous actions, making it easier to understand and maintain complex asynchronous logic.
  • One of the key features of Redux-Saga is its ability to handle complex asynchronous flows, such as chaining multiple API calls or executing actions based on certain conditions.
  • It provides a rich set of built-in effects, such as call for invoking functions, put for dispatching actions, and take for listening to specific actions.
  • Redux-Saga allows for easy testing of sagas using simple generator functions, making it convenient to write unit tests for your application’s side effects.
  • It promotes separation of concerns by moving side effect-related logic out of reducers and into sagas, resulting in cleaner and more maintainable code.
  • With Redux-Saga, you can handle error scenarios gracefully by utilizing the try-catch block within your sagas, allowing for easy error handling and recovery.
  • It integrates seamlessly with Redux and works well with other Redux middleware, making it a powerful tool for managing side effects in Redux applications.
  • Redux-Saga supports cancellation of sagas, which allows you to stop the execution of a saga based on certain conditions or user interactions.
  • It provides a convenient way to handle complex business logic by leveraging the power of generators and the Redux architecture.
  • Redux-Saga has a large and active community, with regular updates and new features being added to the library.

Soft skills of a Redux-Saga Developer

Soft skills are essential for a Redux-Saga Developer as they enhance collaboration, communication, and problem-solving abilities, enabling seamless development and teamwork. Here are the soft skills required at different levels of expertise:


  • Attention to detail: Ability to pay close attention to code quality, potential bugs, and edge cases to ensure robustness and reliability.
  • Curiosity: Eagerness to explore new concepts, technologies, and frameworks to continuously improve skills and stay up-to-date with industry trends.
  • Teamwork: Willingness to collaborate with other developers, designers, and stakeholders to achieve project goals and deliver high-quality software.
  • Time management: Effective prioritization and organization of tasks to meet deadlines and deliver projects on time.
  • Problem-solving: Analytical thinking and problem-solving skills to identify, troubleshoot, and resolve issues that arise during development.


  • Leadership: Ability to take ownership of tasks, guide junior developers, and provide mentorship to help them grow and improve their skills.
  • Adaptability: Flexibility to adapt to changing requirements, technologies, and project dynamics while maintaining productivity and quality.
  • Communication: Strong verbal and written communication skills to effectively convey ideas, collaborate with team members, and provide project updates.
  • Critical thinking: Ability to evaluate different approaches, identify potential risks, and make informed decisions to optimize code performance and efficiency.
  • Empathy: Understanding the needs and perspectives of users, stakeholders, and team members to create user-centric and collaborative solutions.
  • Conflict resolution: Skill in resolving conflicts and addressing disagreements that may arise within the team, promoting a positive and productive work environment.
  • Initiative: Taking proactive steps to identify areas for improvement, propose innovative solutions, and contribute to the overall success of the project.


  • Project management: Experience in overseeing complex projects, coordinating with stakeholders, and ensuring timely delivery while adhering to quality standards.
  • Mentorship: Ability to provide guidance and mentorship to junior and middle developers, sharing knowledge and best practices to foster their growth.
  • Strategic thinking: Capability to align technical decisions with business objectives, considering long-term implications and scalability of the software.
  • Collaboration: Expertise in facilitating productive collaborations between cross-functional teams, ensuring smooth communication and efficient workflows.
  • Innovation: Encouraging and driving innovation within the team by exploring new technologies, frameworks, and approaches to solve complex problems.
  • Decision-making: Proficient in making informed decisions by weighing various factors, considering technical and business requirements.
  • Conflict resolution: Skillful in resolving conflicts and addressing complex interpersonal issues, promoting a harmonious and productive work environment.
  • Strive for excellence: Commitment to maintaining high coding standards, code reviews, and continuous improvement to deliver exceptional software solutions.

Expert/Team Lead

  • Visionary leadership: Ability to define and communicate a clear vision for the team, aligning it with organizational goals and driving innovation.
  • Team management: Experience in managing and leading a team of developers, ensuring efficient resource allocation, and fostering a positive team culture.
  • Strategic planning: Proficient in developing long-term technical roadmaps, identifying risks, and devising strategies to mitigate them.
  • Technical expertise: Extensive knowledge and expertise in Redux-Saga and related technologies, serving as a go-to person for technical guidance and problem-solving.
  • Negotiation and influence: Skillful in negotiating with stakeholders, managing expectations, and influencing decision-making to achieve optimal outcomes.
  • Continuous learning: Encouraging and promoting a culture of continuous learning and professional development within the team.
  • Quality assurance: Ensuring adherence to coding best practices, code reviews, and quality standards throughout the development process.
  • Risk management: Ability to identify and mitigate potential technical and project risks, ensuring smooth project execution and delivery.
  • Strategic partnerships: Building and maintaining strategic partnerships with clients, vendors, and other stakeholders to drive business growth.
  • Effective communication: Expert in communicating complex technical concepts to non-technical stakeholders, fostering understanding and collaboration.
  • Conflict resolution: Skillful in resolving complex conflicts and managing challenging situations within the team, promoting a harmonious work environment.

TOP 10 Redux-Saga Related Technologies

  • JavaScript

    Widely used programming language for web development and the foundation of Redux-Saga. It offers a vast ecosystem, excellent browser compatibility, and extensive community support.

  • React

    A popular JavaScript library for building user interfaces. Redux-Saga works seamlessly with React, allowing developers to manage the application state efficiently while keeping the UI in sync.

  • Redux

    A predictable state container for JavaScript apps. Redux-Saga complements Redux by providing a middleware for handling side effects, such as asynchronous actions and API calls.

  • Saga

    A library for managing asynchronous actions in Redux. Redux-Saga leverages the power of ES6 generators to handle complex asynchronous flows, making it easier to write and test asynchronous code.

  • Axios

    A popular JavaScript library for making HTTP requests. Redux-Saga commonly uses Axios for communicating with APIs and handling data fetching and sending.

  • ESLint

    A pluggable and customizable JavaScript linter. It helps maintain a consistent code style, detects potential errors, and enforces best practices, improving code quality in Redux-Saga development.

  • Webpack

    A module bundler widely used in the React ecosystem. It enables developers to bundle and optimize JavaScript code, manage dependencies, and enhance performance in Redux-Saga projects.

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

Seniority NameYears of experienceResponsibilities and activitiesAverage salary (USD/year)
Junior0-2 yearsAssisting with basic programming tasks, bug fixing, and code reviews under the guidance of more senior developers. Learning and gaining experience in various programming languages and technologies.40,000 – 60,000
Middle2-5 yearsDeveloping new features and modules, participating in architecture design discussions, conducting code reviews, and collaborating with team members to deliver high-quality software products. Proficient in multiple programming languages and technologies.60,000 – 90,000
Senior5-10 yearsDesigning complex software systems, leading development projects, mentoring junior developers, optimizing code performance, and ensuring software quality. Contributing to architectural decisions and providing technical guidance to the team.90,000 – 120,000
Expert/Team Lead10+ yearsLeading a team of developers, setting technical direction and goals, coordinating with stakeholders, managing project timelines, and resolving technical challenges. Actively involved in code reviews, performance optimizations, and driving innovation within the team.120,000 – 150,000+

TOP 12 Tech facts and history of creation and versions about Redux-Saga Development

  • Redux-Saga is a middleware library for managing side effects in Redux applications. It was created in 2015 by Yassine Elouafi.
  • Redux-Saga offers a more declarative approach to handling asynchronous actions compared to other Redux middleware like Redux-Thunk.
  • It allows developers to write complex asynchronous logic in a more readable and testable manner by using ES6 generators.
  • Redux-Saga provides a set of powerful effects such as take, put, call, and fork, which make managing side effects easier.
  • One of the groundbreaking features of Redux-Saga is its ability to handle complex asynchronous flows by leveraging the power of generators.
  • With Redux-Saga, developers can handle complex scenarios like race conditions, parallel execution, and cancellation of asynchronous tasks.
  • Redux-Saga follows a pattern called “saga”, where sagas are generator functions that encapsulate the logic for handling a specific side effect.
  • The middleware intercepts dispatched actions and executes the corresponding sagas, allowing for better separation of concerns.
  • Redux-Saga has gained popularity due to its ability to handle complex asynchronous flows and its testability, making it a preferred choice for many developers.
  • Since its initial release, Redux-Saga has evolved with new versions and improvements, adapting to the changing needs of the developer community.
  • Redux-Saga is widely used in the React ecosystem, especially with Redux, as it provides an elegant solution for managing asynchronous actions.
  • The open-source nature of Redux-Saga encourages community contributions, ensuring ongoing development and enhancement of the library.

Hard skills of a Redux-Saga Developer

Hard skills of a Redux-Saga Developer


  • React: Proficiency in React and understanding of component-based architecture.
  • JavaScript: Strong knowledge of JavaScript and ES6+ features.
  • Redux: Familiarity with Redux and its core concepts like actions, reducers, and store.
  • Redux-Saga: Basic understanding of Redux-Saga and its middleware for handling asynchronous actions.
  • API Integration: Ability to integrate with RESTful APIs using fetch or axios.


  • Advanced React: Expertise in advanced concepts of React like hooks, context API, and portals.
  • TypeScript: Proficiency in using TypeScript for type checking and improving code quality.
  • Redux Toolkit: Experience with Redux Toolkit to simplify Redux setup and reduce boilerplate code.
  • Redux-Saga: Strong understanding of Redux-Saga and its advanced features like generators and effects.
  • Testing: Knowledge of testing frameworks like Jest and Enzyme for writing unit tests.
  • Debugging: Ability to debug and troubleshoot issues in Redux-Saga workflows.
  • Code Optimization: Skill in optimizing Redux-Saga code for performance and efficiency.


  • Performance Optimization: Expertise in optimizing the performance of Redux-Saga applications.
  • Code Architecture: Ability to design scalable and maintainable code architecture using Redux-Saga.
  • Code Review: Skill in conducting code reviews and providing constructive feedback to team members.
  • Error Handling: Proficiency in handling errors and exceptions in Redux-Saga workflows.
  • Concurrency: Knowledge of managing concurrent tasks and handling race conditions in Redux-Saga.
  • Integration Testing: Experience in writing integration tests for Redux-Saga workflows.
  • Deployment: Familiarity with deploying Redux-Saga applications to production environments.
  • Team Collaboration: Ability to collaborate effectively with cross-functional teams.

Expert/Team Lead

  • Architecture Design: Expertise in designing complex and scalable architecture for large-scale applications.
  • Performance Tuning: Ability to fine-tune performance of Redux-Saga workflows for high traffic systems.
  • Code Documentation: Skill in documenting code and maintaining technical documentation.
  • Code Refactoring: Proficiency in refactoring existing Redux-Saga codebase for improved readability and maintainability.
  • Leadership: Experience in leading and mentoring a team of Redux-Saga developers.
  • Strategic Planning: Ability to plan and execute long-term strategies for Redux-Saga development.
  • Code Security: Knowledge of best practices for ensuring code security in Redux-Saga applications.
  • Continuous Integration: Familiarity with setting up and maintaining continuous integration pipelines.
  • Performance Monitoring: Skill in monitoring and analyzing the performance of Redux-Saga applications.
  • Technical Training: Experience in conducting technical training sessions for team members.
  • Problem Solving: Ability to handle complex problem-solving scenarios in Redux-Saga development.

Pros & cons of Redux-Saga

7 Pros of Redux-Saga

  • 1. Better Separation of Concerns: Redux-Saga helps in separating the side effects from the main application logic. It allows developers to handle asynchronous actions separately, making the codebase more modular and maintainable.
  • 2. Improved Testability: Redux-Saga promotes easier testing by providing a way to test each generator function in isolation. This makes it simpler to write unit tests and verify the behavior of sagas.
  • 3. Declarative Approach: With Redux-Saga, developers can write sagas using a declarative approach, which makes it easier to understand and reason about the flow of asynchronous actions. The sagas are composed of small, reusable generator functions that can be combined to handle complex scenarios.
  • 4. Fine-grained Control: Redux-Saga allows for fine-grained control over the flow of asynchronous actions. Developers can pause, cancel, or delay actions based on certain conditions, enabling more flexibility in handling complex scenarios.
  • 5. Middleware Integration: Redux-Saga integrates seamlessly with Redux middleware, allowing developers to combine it with other middleware libraries such as Redux-Thunk or Redux-Logger. This flexibility enables developers to choose the best approach for handling different types of actions.
  • 6. Error Handling: Redux-Saga provides robust error handling mechanisms, allowing developers to catch and handle errors that occur during the execution of sagas. This helps in preventing application crashes and provides a smooth user experience.
  • 7. Scalability: Redux-Saga is designed to handle complex asynchronous flows and can scale well with larger codebases. It provides a structured way to handle asynchronous actions, making it easier to add new features or modify existing ones without introducing spaghetti code.

7 Cons of Redux-Saga

  • 1. Learning Curve: Redux-Saga has a steeper learning curve compared to other Redux middleware libraries. It requires understanding generator functions, yield statements, and the Redux-Saga API. Developers who are new to these concepts may require some time to grasp the fundamentals.
  • 2. Boilerplate Code: Redux-Saga introduces additional boilerplate code compared to other middleware libraries. Sagas need to be defined as generator functions, which can make the codebase slightly more verbose.
  • 3. Complex Debugging: Debugging sagas can be more complex compared to debugging synchronous code. As sagas run asynchronously and can have complex control flow, tracking down issues and understanding the flow of actions may require extra effort.
  • 4. Performance Overhead: Redux-Saga adds a performance overhead due to the additional layer of indirection introduced by generator functions. While the impact may be negligible for most applications, highly performance-sensitive applications may need to consider this overhead.
  • 5. Paradigm Shift: Redux-Saga requires developers to adopt a different mindset and approach to handling asynchronous actions compared to traditional imperative programming. This paradigm shift may take time for developers to adapt to.
  • 6. Not Suitable for Simple Applications: Redux-Saga may not be the best choice for simple applications with minimal asynchronous actions. The additional complexity introduced by sagas may not be justified in such cases.
  • 7. Potential Overuse: There is a risk of overusing Redux-Saga for handling all asynchronous actions, even when simpler alternatives like Redux-Thunk could suffice. This can lead to unnecessary complexity and reduced code maintainability.

Cases when Redux-Saga does not work

  1. Asynchronous operations are not required: Redux-Saga is primarily designed to handle asynchronous operations in Redux applications. If your application does not involve any asynchronous tasks such as API calls or fetching data from a server, then using Redux-Saga might be unnecessary. In such cases, you can consider using simpler alternatives like Redux Thunk or Redux Promise middleware.
  2. Small and simple applications: Redux-Saga introduces additional complexity and boilerplate code to manage asynchronous flows. If your application is small and does not involve complex asynchronous interactions, using Redux-Saga might be overkill. In such cases, opting for a simpler state management solution like Redux without any middleware can be more appropriate.
  3. Steep learning curve: Redux-Saga has a steeper learning curve compared to other Redux middleware like Redux Thunk. It introduces concepts like generators and sagas, which may require developers to familiarize themselves with new patterns and syntax. If your development team is already comfortable with another middleware or if you have tight project deadlines, it might be more practical to stick with a middleware they are already familiar with.
  4. Performance impact: While Redux-Saga offers powerful functionality for managing complex asynchronous flows, it comes with a performance cost. The use of generators and the additional layer of indirection can introduce some overhead. If performance is a critical concern for your application, you might need to evaluate whether the benefits of using Redux-Saga outweigh the potential performance impact in your specific use case.
  5. Not suitable for simple sequential operations: Redux-Saga is primarily designed to handle complex asynchronous flows and parallel operations. If your application involves simple sequential operations where each step depends on the completion of the previous one, using Redux-Saga might be unnecessary. In such cases, you can use async/await or plain JavaScript promises to handle the sequential operations more succinctly.

What are top Redux-Saga instruments and tools?

  • Redux DevTools: Redux DevTools is an essential tool for debugging and monitoring Redux applications. It allows developers to inspect Redux store state, track actions, and replay them. This tool has been widely adopted by the Redux community and has improved the development workflow for Redux-based applications.
  • Redux-Saga: Redux-Saga is a middleware library for Redux that provides an elegant way to handle side effects in Redux applications. It allows developers to write asynchronous logic, such as making API calls, in a more readable and testable manner. Redux-Saga has gained popularity for its ability to manage complex asynchronous flows and its integration with the Redux ecosystem.
  • Reselect: Reselect is a memoized selector library for Redux. It helps in efficiently computing derived data from the Redux store. By using memoization techniques, Reselect avoids unnecessary computations, resulting in improved performance. It has become a go-to tool for optimizing Redux applications that deal with large amounts of data.
  • Redux-Thunk: Redux-Thunk is a middleware for Redux that enables the use of asynchronous actions. It allows developers to write action creators that return functions instead of plain objects. This flexibility is useful when dealing with asynchronous operations, such as making API calls. Redux-Thunk has been widely used in the Redux ecosystem and is known for its simplicity and ease of integration.
  • Immutable.js: Immutable.js is a library that provides immutable data structures for JavaScript. It helps in managing state immutability in Redux applications, ensuring that state changes are handled correctly. Immutable.js offers persistent and efficient data structures, making it easier to reason about state changes in Redux applications. It has been used in many Redux projects to maintain consistent state management.
  • Redux-Persist: Redux-Persist is a library that enables persisting Redux state in a persistent storage layer, such as local storage or AsyncStorage. It allows developers to preserve the state of their Redux applications across browser refreshes or app restarts. Redux-Persist simplifies the process of persisting and rehydrating Redux state, making it a popular choice for applications that require persistent state management.
  • React-Redux: React-Redux is the official Redux binding for React. It provides a set of APIs that allow React components to interact with the Redux store. React-Redux simplifies the process of connecting React components to the Redux store, making it easier to build scalable and maintainable React applications with Redux. It is widely used in the React and Redux ecosystem.
  • Redux-Logger: Redux-Logger is a middleware for Redux that logs Redux actions and state changes. It helps in debugging Redux applications by providing detailed logs of actions and their effects on the state. Redux-Logger is known for its ease of integration and its ability to provide valuable insights into the Redux application’s behavior during development.
  • Redux-Form: Redux-Form is a library that helps in managing form state in Redux applications. It provides a set of Redux-compatible form components and utilities for handling form validation, synchronization, and submission. Redux-Form simplifies the process of handling complex forms in Redux applications, making it a popular choice for managing form state in Redux-based projects.
  • React-Router: React-Router is a popular routing library for React applications. It helps in managing the navigation and routing logic of React applications. React-Router integrates seamlessly with Redux, allowing developers to handle routing and state management in a unified manner. It has been widely used in Redux applications to handle complex routing requirements.

How and where is Redux-Saga used?

1. Asynchronous Data FetchingRedux-Saga allows developers to handle asynchronous data fetching in a more organized and efficient manner. With Redux-Saga, you can easily manage complex asynchronous operations such as making API calls, handling authentication flows, and managing data synchronization between client and server.
2. Complex Data Flow and Side EffectsRedux-Saga is particularly useful when dealing with complex data flows and side effects in your application. It provides a declarative way to handle asynchronous actions and side effects, making it easier to manage and test complex business logic.
3. Real-time Updates and WebSocket IntegrationRedux-Saga can be used to handle real-time updates and integrate with WebSocket protocols. It allows you to listen to WebSocket events, dispatch actions based on those events, and update the application state accordingly. This is especially valuable in applications that require real-time data synchronization, such as chat applications or collaborative editing tools.
4. Error Handling and Retry StrategiesRedux-Saga provides robust error handling capabilities, allowing you to handle errors and implement retry strategies for failed asynchronous operations. You can define specific error handling logic and retry policies, such as exponential backoff, to ensure a smooth user experience even in the face of network or server failures.
5. Complex Authentication FlowsRedux-Saga simplifies the handling of complex authentication flows, such as token refreshing, token expiration, and session management. It provides a clear and structured way to handle authentication-related side effects, ensuring a secure and seamless user experience.
6. Testing and DebuggingRedux-Saga offers excellent testing and debugging capabilities. Its pure and predictable generator-based approach makes it easy to write unit tests for sagas, mock asynchronous operations, and debug the flow of actions and effects. This helps developers ensure the correctness and reliability of their application.

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