Senior Full Stack React.js / Node.js Developer
Greenwood Village, CO
Category: Development
Industry: Communications
Reference ID: JN -072026-107951
Date Posted: 07/16/2026
Shortcut: http://careers.eliassen.com/QCXcia
Description:
On-site in Greenwood Village, CO
Our client seeks a Senior Full Stack React.js / Node.js Developer for a long-term contract on the internal build and tools team. You will contribute core features across multiple web applications that serve internal and external customers, collaborating across business units and ensuring quality through testing and best practices.
Due to client requirements, applicants must be willing and able to work on a w2 basis. For our w2 consultants, we offer a great benefits package that includes Medical, Dental, and Vision benefits, 401k with company matching, and life insurance.
Rate: $60.00 to $66.00/hr. w2
Responsibilities:
- Build, test, and deliver full stack features across multiple web applications.
- Develop high-quality React.js front-end components with TypeScript and semantic HTML/CSS/SCSS.
- Implement and maintain Node.js back-end services and APIs.
- Consume and build REST and GraphQL APIs with attention to performance and security.
- Apply accessibility standards and web development best practices.
- Create and maintain unit and automation tests using Jest, React Testing Library or Enzyme, and tools such as Cypress or Selenium.
- Containerize and deploy services using Docker and Kubernetes on AWS.
- Collaborate with onshore and offshore teams and participate in code reviews.
Experience Requirements:
- 7+ years of professional experience with JavaScript, TypeScript, and React.js.
- Strong AI context and harness engineering experience with AI coding tools such as Claude Code, Codex, and Kiro.
- 3+ years of professional Node.js back-end development.
- Professional experience with TypeScript.
- Experience coordinating with offshore teams, including teams in India.
- 2+ years of experience consuming REST APIs.
- 1+ year of experience with SQL/NoSQL databases such as PostgreSQL, MySQL, or MongoDB.
- Experience with semantic HTML, CSS, and SCSS.
- Experience with accessibility practices.
- React unit testing using Jest and Enzyme or React Testing Library.
- State management using Redux or Apollo.
- Consuming and building REST and/or GraphQL APIs.
- Knowledge of performance, security, and browser APIs.
- Experience with Docker, Kubernetes, and AWS.
- Experience with automation testing using Cypress or Selenium.
- Ability to work on-site in Greenwood Village, CO. Willingness to attend in-person interviews. Ability to observe mandatory time off periods as scheduled by the client.
Education Requirements:
Bachelor’s degree or equivalent education in Computer Science, Information Technology, or related field.
Skills, experience, and other compensable factors will be considered when determining pay rate. The pay range provided in this posting reflects a W2 hourly rate; other employment options may be available that may result in pay outside of the provided range.
W2 employees of Eliassen Group who are regularly scheduled to work 30 or more hours per week are eligible for the following benefits: medical (choice of 3 plans), dental, vision, pre-tax accounts, other voluntary benefits including life and disability insurance, 401(k) with match, and sick time if required by law in the worked-in state/locality.
If anyone reaches out to you about an open position connected with Eliassen Group, please ensure that you are working directly with us by confirming the following:
· When you work with Eliassen Group, all email communication will come from an Eliassen.com address, never Gmail, Yahoo, etc.
· Eliassen Group will never ask you for personal information (home address, bank account, or check routing number) until you have worked with someone clearly associated with Eliassen Group.
If you have any indication of fraudulent activity, please contact fraud@eliassen.com.
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Eliassen Group is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, gender identity, national origin, age, protected veteran status, or disability status. Eliassen Group’s Affirmative Action Plan (AAP) is available for inspection by any employee or applicant for employment upon request, during normal business hours of Monday through Friday, 8:30am to 5:30pm EST. Interested persons should contact Phaedra Wells at pwells@eliassen.com for assistance. It is unlawful in Massachusetts and Maryland to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.
Applicants with disabilities that believe they require an accommodation or assistance with a position, please email our HR team at hradmin@eliassen.com. This email inbox is designed exclusively to assist job seekers whose disability prevents them from being able to apply online. Emails sent for other purposes will not receive a response.
Please be advised that a number of fraudulent job postings have been released under the Eliassen Group brand.
Unfortunately, fraudulent job postings can happen. If anyone reaches out to you about an open position connected with Eliassen Group, never provide personal or financial information to anyone who is not clearly associated with Eliassen Group
If anyone seemingly from Eliassen Group has ever requested this personal information in the past or does so in the future, please contact fraud@eliassen.com.
Please ensure that you are working directly with us by confirming the following:
- When you work with Eliassen Group, all email communication will come from an Eliassen.com address, never Gmail, Yahoo, etc.
- Eliassen Group will never ask you for personal information (home address, bank account, or check routing number) until you have worked with someone clearly associated with Eliassen Group, as indicated above