We are looking for a Senior Python Developer with strong experience in PySpark to join one of our international projects. This role is fully remote, but the professional must be based in Portugal.Work model: 100% Remote (from Portugal)Start date: ImmediatelyKey Responsibilities:Develop and maintain robust backend solutions using Python and PySparkLead the investigation and resolution of complex technical issuesWork closely with international teams and third-party providersWrite clean, well-documented, and efficient code following best practicesCollaborate on solution design and technical documentationParticipate in the optimization of systems, processes, and data pipelinesUse Airflow for workflow orchestration and Snowflake for complex queriesRequirements:3+ years of experience in backend development with PythonStrong proficiency in PySpark or similar big data frameworksSolid knowledge of OOP, SOLID principles, and design patternsExperience with cloud platforms (AWS and/or Azure)Proficiency in Snowflake and complex SQL queriesKnowledge of AirflowFluent in English (min. B2); Portuguese is a plusInterested? Apply directly or send your CV and daily rate to j.sierra@asenium.com.