Senior Frontend Developer React - Full Remote

About HELPLINE

HELPLINE specializes in IT user support and the implementation of an AI-augmented employee experience, where human expertise and technology mutually enrich each other. Its teams provide user support, application support, local support, IT asset management, and GRC (Governance, Risk, and Compliance).

Its mission is twofold: to support the operational needs of IT departments and business units, and to offer employees a fluid and reliable experience, aligned with consumer brand standards.

Operating in France and globally, HELPLINE has 2500 employees serving over 200 clients. It projects a turnover of over €200 million in 2025.

HELPLINE is part of Everience, an international group of augmented digital consulting and services, a pioneer in Human-AI symbiosis in business.

Located in the heart of Lyon's 7th arrondissement, our agency, established in 2019, now has 150 employees working either at our service center or on-site with clients in technical assistance. We serve the entire Auvergne-Rhône-Alpes region with key clients such as EM Lyon, SNCF, and SUEZ.

Job Description

Mission Context

As part of the development of a strategic internal solution for sales teams, this role involves designing and developing a frontend web application to provide data-driven indicators, analyses, and tools.

The goal is to improve sales activity management and support growth by offering a modern, high-performance, and user-friendly interface.

The Senior Frontend Developer will work within a fully remote product/technical team, interacting with data and backend teams, and will integrate the application into the existing information system.

Responsibilities

• Design and develop the application's user interface using React and TypeScript.
• Implement a reusable and structured component architecture.
• Implement and optimize state management (Redux, Context API, local state).
• Manage application routing and complex user journeys.
• Optimize frontend performance (load times, rendering, navigation, lazy loading, memoization).
• Develop and maintain unit and integration tests (Jest, React Testing Library).
• Ensure integration with existing APIs.
• Collaborate closely with product, data, and backend teams to refine functional requirements and enhance user experience.

Qualifications

Profile

Mandatory Skills

• Advanced expertise in React (Hooks, Context API, lifecycle).
• Solid experience in modular frontend architecture and reusable components.
• Proficiency in state management (Redux, Context, local state).
• Frontend performance optimization.
• Proficiency in complex routing with React Router.
• Excellent command of TypeScript.
• Proven experience in modern frontend development.
• Knowledge of SSR / Next.js environments.
• Experience with unit and integration testing.

Optional Skills

• Experience in Python (development or scripting).
• Ability to interact with backends or data pipelines in a Python environment.

Languages

• Fluent English required.

Additional Information

All our positions are open to all genders and are of course open to people with disabilities.