Specialist Software Engineer – UI / UX (ReactJS / NodeJS)

Specialist Software Engineer – UI / UX (ReactJS / NodeJS)

Experience: 4–7 Years

Responsibilities

. Build and enhance complex, responsive, high‑performance user interfaces using ReactJS.

. Design and develop rule authoring user experiences that enable business users to define, edit, and validate rules without writing code.

. Implement advanced form‑driven UIs with inline validation, rule consistency checks, and guided authoring flows.

. Develop mapping tree and DAG visualizations to represent hierarchical transformations and reuse structures.

. Implement impact analysis and change visibility features, showing impacted rules, trees, usages, and certifications prior to publishing.

. Build version comparison UIs with side‑by‑side views highlighting logical, parameter, and metadata changes.

. Integrate frontend modules with NodeJS backend services using REST APIs.

. Manage React state solutions to support complex interactions and navigation flows.

. Ensure cross‑browser compatibility, performance optimization, and accessibility compliance.

. Collaborate closely with UX designers, product owners, and backend engineers to deliver cohesive user journeys.

. Support operational UI features such as execution status dashboards and filtering capabilities.

. Participate in production support, troubleshooting UI issues, and improving platform usability.

. Write unit and integration tests and participate in code reviews.

. Mentor junior engineers and contribute to shared UI standards.

. Own UI feature delivery end‑to‑end within Agile sprints.

. Be flexible to support global teams and Paris business hours when required.

Profile Required: Experienced UI / UX Software Engineer with strong ReactJS expertise and experience delivering complex, business‑critical enterprise user interfaces.

Minimum Qualifications

. Strong hands‑on experience with ReactJS, modern JavaScript, Typescript, HTML, and CSS.

. Experience building form‑heavy, configuration‑driven UI platforms.

. Solid experience integrating with NodeJS backend services via REST APIs.

. Hands‑on experience with frontend state management.

. Proven experience in performance optimization and UI scalability.

. Experience with Git, Agile practices, and frontend testing.

Preferred Qualifications

. Experience implementing data visualization, trees, DAGs, or graph‑based UIs.

. Exposure to operational dashboards, monitoring, or analytics UIs.

. Strong understanding of UX principles for business and operational users.

. Familiarity with accessibility standards and enterprise UI governance.

• *Your future duties and responsibilities**

• *Required qualifications to be successful in this role**

• *Together, as owners, let’s turn meaningful insights into action.**

Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you’ll reach your full potential because…

You are invited to be an owner from day 1 as we work together to bring our Dream to life. That’s why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company’s strategy and direction.

Your work creates value. You’ll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace new opportunities, and benefit from expansive industry and technology expertise.

You’ll shape your career by joining a company built to grow and last. You’ll be supported by leaders who care about your health and well\-being and provide you with opportunities to deepen your skills and broaden your horizons.

Come join our team—one of the largest IT and business consulting services firms in the world.