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# JavaScript Engineer

- **Company:** Excella Co
- **Location:** Arlington, VA, United States
- **Experience:** Expert
- **Salary:** $116,900.0 - $161,500.0
- **Contract:** Permanent contract
- **Skills:** Clean Code Principles, HTML, JavaScript (Programming Language), Agile Methodology, Automation of Tests, Cascading Style Sheets (CSS), Software Quality, Code Review, Continuous Delivery, Web Development, Revision Control Systems, Node.Js, NoSQL, Productivity Software, Selenium, SQL Databases, TypeScript, Vagrant, Web Content Accessibility Guidelines, Trunk-based Development, GitHub Copilot, ReactJS, Express.js, Cypress (Programming Language), Puppeteer (Software), Git, AngularJS, Front End Software Development, Claude, Functional Programming, React Testing Library, Teamcity, Puppet, Restful APIs, TravisCI, GPT, Jenkins
- **Published:** October 29, 2026
- **Apply:** https://www.excella.com/careers/apply/4748632005

## About the Role

As a Senior Consultant at Excella, you will play a key role in delivering high-quality software solutions for our commercial and government clients. You will leverage your technical expertise to build cutting-edge applications while working closely with clients and team members in an Agile environment. Your ability to communicate effectively and collaborate will be critical to delivering impactful solutions., * 3+ years of experience developing web applications.

 * Strong understanding of core JavaScript, TypeScript, and functional programming fundamentals.
 * Experience with JavaScript frameworks such as Angular or React.
 * Proficiency in HTML, CSS, and front-end web design concepts.
 * Experience working within Web Content Accessibility Guidelines to ensure optimum accessibility standards are met for users.
 * Proficiency working with automated test suites such as Jest and React Testing Library
 * Experience working with RESTful APIs.
 * Hands-on experience with version control tools like Git.
 * Familiarity with Agile development practices.
 * Strong problem-solving skills and ability to work in a client-facing environment., * Experience working with server-side JavaScript environments and frameworks such as Node and Express.js
 * Experience in full-stack development including asynchronous, parallel, and non-blocking programming techniques
 * Understanding of SQL, NoSQL and/or Document-based storage systems
 * Understanding of trunk-based development practices such as using feature flags
 * Experience with E2E test frameworks including Cypress, Puppeteer, and Selenium
 * Knowledge in implementing secure programming practices
 * Experience with DevOps and Continuous Delivery tools like Jenkins, Codeship, TeamCity, Vagrant, Puppet, Chef, TravisCI, GoCD or similar
 * Familiarity using GenAI productivity tools such as ChatGPT, Claude, and Github CoPilot

## Description

* Develop and implement software solutions using technologies such as JavaScript, TypeScript, Node.js, and React.
 * Collaborate with clients to understand business requirements and translate them into technical solutions.
 * Employ Agile methodologies to deliver high-quality software efficiently.
 * Write clean, maintainable, and efficient code while following best practices.
 * Stay current with emerging technologies and recommend their adoption where appropriate.
 * Participate in code reviews, ensuring high standards for code quality.
 * Work independently while contributing to a team-oriented environment.