Senior Backend Developer

QualiTest · Bucharest, Romania · Posted Jan 22, 2026

About the job Were looking for a Senior Backend Developer with strong Python experience to design and scale backend systems for data-driven applications. Youll work on training models, prediction pipelines, and data collection through scraping, APIs, or databases. Responsibilities Build and optimize APIs and ML model services. Develop and maintain data pipelines and data integrations. Deploy and scale containerized applications in cloud environments. Requirements 4+ years of backend development experience with Python. Expertise with Flask or FastAPI (migration in progress). Strong knowledge of PostgreSQL, Docker, Kubernetes, and Azure. Experience with ML pipelines, data collection, and scalable backend systems Benefits Private health subscription + hospitalization package Private dental subscription Gym subscription Vouchers/bonuses for special events (birthday, Christmas, Easter, etc) Meal vouchers of 35 RON/working day Ability to work with a global company and immerse in an variety international projects with different cultures within the IT industry. Access to cutting edge and state of the art technologies current with the everyday evolvement of technologies. Development opportunities with free access to over 3000+ training courses and peer to peer mentoring support