Senior Backend Developer - Permanent - Barcelona

Experteer Overview As a Senior backend developer at papernest, you will own the technical direction of the B2B web platform used by agencies and their clients. You will collaborate with cross-functional teams across Europe to shape scalable backend solutions and improve deployment speed and reliability. You’ll tackle billing automation, data management, and system integrations, delivering high-quality features from development to production. This role offers meaningful impact in a fast-growing, international environment with mentoring responsibilities. Pay / Benefits * Own the product from a technical perspective and drive architecture decisions * Collaborate with developers, product, QA, and teams across Europe * Challenge requirements and anticipate technical challenges * Propose and implement technical solutions to improve architecture * Lead roadmap planning and ensure delivery * Develop features with unit and integration tests * Ensure features work from integration to production * Participate in code reviews and process improvements * Support deployment frequency and reduce lead time for changes * Mentor junior developers and share knowledge across teams Tasks * 5+ years of backend development experience in Python * Strong command of Python and Django * Experience with relational and/or non-relational databases and Django ORM * Good knowledge of Docker and Git * Knowledge of web technologies * Passion for new technologies and initiative * Rigour and autonomy * Interest in user experience as a product aspect * Willingness to work with teams in France, Spain, and Poland * Proficient English (written and spoken) Key requirements * remote work (2 days per week) * health insurance through Alan or Sanitas * meal partnerships and perks * training and career development * career growth opportunities * World-class international environment

from * Participate in code reviews and process improvements * Support deployment frequency and reduce lead time for changes * Mentor junior developers and share knowledge across teams Tasks * 5+ years of backend development experience in Python * Strong command of Python and Django * Experience with relational and/or non-relational databases and Django ORM * Good knowledge of Docker and Git * Knowledge of web technologies * Passion for new technologies and initiative * Rigour and autonomy * Interest in user experience as a product aspect * Willingness to work with teams in France, Spain, and Poland * Proficient English (written and spoken) Key requirements * remote work (2 days per week) * health insurance through Alan or Sanitas * meal partnerships and perks * training and career development * career growth opportunities * World-class international environment