We are looking for a Tech Lead / Senior Front-End Developer to join international projects, taking on a technical leadership role in the development of web and mobile applications, with regular communication in French and English.ResponsibilitiesProvide technical leadership in front-end web and mobile developmentDefine and promote best practices in architecture, code quality, and performanceDevelop modern, responsive, and user-centric interfacesMentor and support junior developers (code reviews, technical guidance)Collaborate closely with UX/UI, back-end, product, and QA teamsParticipate in technical decisions, estimations, and solution designCommunicate effectively with international stakeholders in French and EnglishRequirementsSolid experience as a Senior Front-End Developer / Tech LeadStrong proficiency in JavaScript / TypeScriptHands-on experience with modern frameworks (React, Angular, or Vue.Js)Experience in web and mobile development (e.G. React Native)Strong knowledge of HTML5, CSS3, and responsive designLeadership mindset with strong problem-solving skillsFrench level B1 (mandatory) and English level B2 (mandatory)Nice to HaveExperience with micro-frontend architecturesKnowledge of CI/CD pipelines and front-end testing (Jest, Cypress, etc.)Experience working in Agile/Scrum environmentsStrong sensitivity to UX/UI principles and performance optimization