.Founded in 2015, papernest is a French startup and member of the French Tech 120, which helps individuals manage their contracts and subscriptions on a daily basis. Our platform enables individuals to combine, terminate and subscribe to all their housing contracts - electricity, gas, internet box, mobile, home insurance - in just a few clicks. Today, housing contracts; tomorrow, all those of daily life: transport, streaming, gyms, etc. papernest's ambition is to become the platform from which anyone can centralise, optimise and terminate all their subscriptions. Since 2015, papernest has grown considerably: more than 1M customers, 1000 employees, 4 markets in Europe and offices in Paris, Barcelona, Reims and Warsaw.For almost 10 years, papernest has successfully assisted over 1.5 million users in alleviating one of life's most tedious tasks: contract management. Our innovative solution empowers customers to seamlessly move, manage, and switch their contracts, all within a unified platform, and best of all, for free. Our services are available across France, Spain and Italy (for the time being!). In an ever-changing world, we take confident steps, guided by the continuous development of our self-sustaining business model. Our success story is woven around an innovative B2B2C model, forged through strategic partnerships with major players in real estate and banking.We are dedicated to fostering an exciting and vibrant work environment because that's what brings out the best in us. We believe that business needs to be disruptive and ambitious in order to thrive. However, we're not limited to just being good at business. We are also committed to our social responsibility as we strive to actively contribute to the community we belong to, minimize our environmental impact, and aim to foster a culture of social engagement and consciousness among our co-workers. At the heart of our philosophy is the commitment to long-term success over short-term convenience. We highly value the contributions of each of our 800+ employees, providing them with ample opportunities for growth and the development of invaluable skills.As a Senior Backend Developer, you will: Take ownership of the product from a technical standpoint.Work closely with dev, product, QA, and other teams across Europe.Challenge product requirements and anticipate technical difficulties.Take initiative in proposing technical solutions.Ensure state-of-the-art design and implementation with respect to the global architecture of the platform.Take part in roadmap planning and take ownership of its delivery.Develop features ensuring unit and integration test coverage.Ensure that delivered features work perfectly from integration to production.Participate in code reviews.Help in continuous improvements of team practices.Ability to strategically step back to enhance deployment frequency, reduce the number of bugs introduced and shorten the "lead time for changes"