STAGE Développeur·se Web / UX-UI & CRO (H/F)

Tiime
Full-time•Paris, France

📍 Job Overview

Job Title: STAGE Développeur·se Web / UX-UI & CRO (H/F)

Company: Tiime

Location: Paris, Ile-de-France, France

Job Type: INTERN

Category: Growth Marketing & Operations

Date Posted: 2026-07-24

Experience Level: Intern (0-2 years)

Remote Status: Hybrid

🚀 Role Summary

  • This internship focuses on the intersection of web development, user experience (UX), user interface (UI) design, and Conversion Rate Optimization (CRO) to enhance user journeys and drive business growth.

  • Responsibilities include developing and integrating new web pages and components, improving existing site functionality, and ensuring responsive and accessible design.

  • A key aspect of the role involves designing and implementing A/B tests, analyzing user behavior data, and iterating on optimizations to improve conversion rates.

  • The intern will collaborate closely with marketing, growth, and product teams, contributing directly to the user-facing aspects of Tiime's platform and marketing initiatives.

📝 Enhancement Note: While the title includes "Développeur·se Web" and "UX-UI", the core responsibilities and emphasis on CRO and A/B testing place this role firmly within a Growth Marketing or Digital Operations function, rather than a pure software development role. The role is ideal for someone seeking hands-on experience in optimizing digital touchpoints for conversion.

📈 Primary Responsibilities

  • Develop and integrate new web pages, components, and conversion funnels (e.g., landing pages for account creation and accounting services) using HTML, CSS, and JavaScript.

  • Enhance existing website functionalities, optimize performance, and reduce loading times in collaboration with the technical team.

  • Ensure all developed interfaces are responsive across various devices and adhere to accessibility standards.

  • Design and implement A/B tests on elements such as headlines, calls-to-action (CTAs), page layouts, and entire conversion funnels.

  • Analyze user behavior through tools like heatmaps, session recordings, and analytics platforms (e.g., Google Analytics) to identify friction points and opportunities for improvement.

  • Design wireframes and interactive prototypes that are optimized for conversion and user

Application Requirements

Candidates should have a Master's level degree in web development or digital design and proficiency in HTML, CSS, JavaScript, and Figma. An interest in data-driven conversion and experience with analytics tools is highly valued.