Senior Full Stack React.js / Node.js Developer

Job DescriptionJob DescriptionDescription:On-site in Greenwood Village, COOur 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.Recruitment Transparency NoticeEliassen Group values transparency in our recruitment practices. Please be advised that Eliassen Group utilizes artificial intelligence (AI) tools as part of its initial application screeningand hiringprocess. You may receive email and SMS notifications from the Eliassen Virtual Recruiting Team (View email address on click.appcast.io, View phone number on click.appcast.io) inviting you to complete a brief voice screening as part of your application process. These tools assist our hiring teams in different ways, including but not limited to, assistance in reviewing application materials to help identify candidates whose qualifications most closely match the requirements of the position. All AI-assisted evaluations and responses are reviewed by human recruiters before any hiring decisions are made. The use of AI in our process is intended to support fairness, efficiency, and consistency, and Eliassen Group takes measures to prevent bias or discrimination in connection with its hiring practices. By proceeding, you acknowledge, agree, and consent to Eliassen Group’s use of these tools, including AI tools, as part of the application and hiring process.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 View email address on click.appcast.io Eliassen Group:Eliassen Group is a strategic consulting firm that helps organizations reach further and achieve more through our technology, business advisory, and life sciences solutions. For nearly 40 years, we have combined exceptional people, deep domain expertise, and intelligent capabilities to expand our clients’ capacity and accelerate meaningful outcomes. We are driven by a purpose to positively impact the lives of our employees, clients, consultants, and the communities we serve.Eliassen is committed to building a diverse and inclusive team from a variety of backgrounds, perspectives, and skills. We are an Equal Opportunity and Affirmative Action Employer and all employment decisions are based on merit, performance, and business needs. Eliassen does not discriminate on the basis of race, color, gender identity or expression, sexual preference or orientation, sex (including pregnancy, childbirth, and related medical conditions), marital status, creed, religion, physical or mental disability, genetic information, military or veteran status, age, ancestry, national origin, citizenship status, prohibited criminal record inquiries of applicants and employees, or any other category protected by federal, state, or local laws.Don’t miss out on our referral program! If we hire a candidate that you refer us to then you can be eligible for a $1,000 referral check!