This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Staff Engineer - Client Experience based in France. This is a senior technical leadership role focused on building robust, scalable systems that support global commerce and complex payment experiences.You will tackle the most challenging engineering problems while shaping architecture, technical strategy, and long-term platform direction.The role combines hands-on software development with mentorship, cross-functional leadership, and organization-wide technical influence.You will work across cloud-native infrastructure, distributed systems, high-throughput services, and modern backend technologies.As part of an AI-native engineering environment, you will also help define how AI-assisted development is applied across design, implementation, testing, and code review.Your work will directly influence engineering standards, system reliability, performance, and the ability of teams to deliver complex products effectively.Success means becoming a trusted technical voice while raising the engineering bar through architecture, mentorship, and consistently high-q... Click Apply to read the full job description.