(Senior) Product Engineer (Backend) (m/f/d)

This full-time position is based in France and involves designing, building, and maintaining scalable backend services for SaaS products. The day-to-day work includes creating APIs, data models, and integrations while taking ownership of features from initial problem discovery through to rollout and impact measurement. Candidates are expected to use Kotlin or Java alongside modern web frameworks to develop these systems. The role also requires the practical application of AI coding assistants to explore codebases, speed up development, and make structured changes across different technology stacks. While the primary focus is on backend engineering, the position encourages extending work into web, mobile, or infrastructure areas when necessary to deliver complete product experiences. The advert does not specify a minimum number of years of experience or particular academic qualifications, nor does it list any specific language requirements beyond the job title's inclusive notation. No details regarding office, hybrid, or remote working arrangements are provided in the text. This opportunity suits engineers who value curiosity, adaptability, and engineering judgment, and who wish to move beyond implementing predefined tickets to actively shaping solutions and measuring their user impact. The environment supports autonomy for expanding technical scope while fostering a product-minded approach to software development.