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React.js Developer

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Date: Jul 21, 2022

Location: Neenah, WI, US, 54956

Company: J. J. Keller & Associates, Inc.

Requisition #: 
Functional Area:  Software Development; Information Technology
Employment Type:  Full-Time
Work Options:  Remote / Work from Home in the US
Work Hours:  Standard Business Hours

Position Summary

J. J. Keller & Associates, Inc. is seeking an experienced React.js Developer. As a React.js Developer, you'll contribute from conception to completion on projects that are technologically sound and aesthetically impressive. The primary focus of the position would be on developing user interface components, and implementing and executing them following well-known React.js workflows. This position will also ensure that these components and the overall application are robust and easy to manage.

Job Responsibilities

  • Develop the latest user-facing features using React.js.
  • Design a modern highly responsive web-based user interface.
  • Build reusable components and front-end libraries for future use.
  • Translate designs and wireframes into high-quality code.
  • Learn and understand user interactions.
  • Optimize components for maximum performance across a vast array of web-capable devices and browsers.
  • Coordinate with team members working on distinct layers.



  • Expertise and thorough understanding of React.js and its core principles.
  • 5+ years React.js experience.
  • Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model.
  • Prior experience with popular React.js workflows (such as Flux or Redux).
  • Familiarity with more current specifications of ECMAScript.
  • Familiarity with React testing library and other JavaScript testing frameworks.
  • Familiarity with RESTful API.
  • Familiarity with HTML/CSS.
  • Proficient using Git.
  • Knowledge of modern authorization mechanisms, such as JSON Web Token.
  • Familiarity with modern front-end build pipelines and tools.
  • Experience with common front-end development tools such as Babel, Webpack, NPM, etc.
  • Ability to understand business requirements and translate them into technical requirements
  • Skilled at benchmarking and optimization.



  • Associate's degree in a computer science or technology-related field.


Other Skills:

  • ReactJS - 5 years preferred
  • CSS - 3 years preferred
  • HTML - 3 years preferred
  • JavaScript - 7 years preferred
  • Jenkins - 3 years preferred
  • RESTful API - 2 years preferred
  • ECMAScript / ES6 - 1 year preferred
  • JSON Web Token / JWT - 1 year preferred

Physical Requirements

Work is performed primarily in a standard office environment. Work involves operation of personal computer equipment for extended periods of time. Travel to customer sites and/or industry and training events may also be required, depending on assignment.

 Other Information


At J. J. Keller, we are Difference Makers because the work we do truly matters. We protect people’s lives every day. In fact, more than 90% of Fortune® 1000 companies rely on J. J. Keller to help create safe work environments. View our CAREERS video to learn more about being a Difference Maker at J. J. Keller and click here to learn what our associates have to say about life as an associate at J.J. Keller. 

Thank you for your interest in career opportunities with J. J. Keller & Associates, Inc.!  If you experience system-related issues or need assistance with the online application, please call (920) 720-7700.

Not the right role for you, but know someone who could be a great fit? Refer them to us through our Professional Referral Program and you will earn a cash payment if your referral is hired. Learn more here.

J. J. Keller provides a competitive benefit package which includes the following (eligibility requirements apply):  Medical, Dental, and Vision Insurance, 401(k) and Profit Sharing Plan, etc. The compensation range for this role in Colorado is $100,000.00 to $130,000.00. Compensation and benefits information for this position is being included in accordance with requirements of the Colorado Equal Pay for Equal Work Act. Note that J. J. Keller is not currently recruiting employees to work in California. J. J. Keller & Associates, Inc. is an Equal Opportunity Employer and does not discriminate against any employee or applicant for employment because of race, color, sex, age, national origin, religion, sexual orientation, gender identity, status as a veteran, and basis of disability or any other federal, state or local protected class.

Nearest Major Market: Oshkosh
Nearest Secondary Market: Appleton

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