5 to 8 years of relevant backend development experience, ideally with data-intensive systems Strong proficiency in at least one backend language (C#, Java, C++) Hands-on AWS experience (EC2, S3, Lambda, RDS/Redshift, DynamoDB, etc.) Knowledge of ELT/ETL concepts and large-data challenges Solid software design fundamentals and passion for clean, maintainable code Strong communication skills and English level B2 or higher