Senior Backend Software Engineer

Billennium is a global technology company with over 20 years of experience, committed to innovation and empowering businesses. As an employer, we offer a supportive, growth-focused environment where collaboration and creativity thrive. Join us to shape the future of technology together!

Job Description:

We are looking for a focused Senior Backend Software Engineer to lead a critical infrastructure mission: transitioning data warehouse to the analytics platform. This is a dedicated project where you will bridge the existing Java-based backend environment with modern data processing frameworks to ensure a seamless migration.

Profile Requirements

• At least 5 years of experience as a Software Engineer, with a minimum of 3 years focused on Backend/Data engineering.
• High proficiency in Java, Spark, and Python is required to navigate the existing backend and build new data pipelines.
• Strong experience working with both relational and NoSQL databases, specifically MongoDB and SQL (PostgreSQL).
• Hands-on experience with Amazon Web Services (AWS) or equivalent cloud providers.
• A commitment to clean code, test coverage, and building future-proof, scalable architectures.
• Great written and verbal communication in English.

Nice-to-Have

• Experience with medical, security, and privacy regulations (GDPR/HIPAA).
• Experience working in agile environments.

Perks and benefits:

• Comprehensive benefits - enjoy Udemy for Business, private medical care, Multisport card, veterinary package, language lessons, and shopping vouchers.
• Career growth - access opportunities for professional development and learning, including perks related to our official partnerships with global IT giants: Microsoft, AWS, Snowflake, Salesforce & more.
• Global collaboration - work with a diverse, international team.
• Innovative environment - be part of a forward-thinking and growth-oriented workplace.
• Engaging community – Work with passionate professionals and participate in team-building events, hackathons, and CSR initiatives to make an impact beyond work.
• Team-building events including our company tradition (annual company event in Mazury).
• A pleasant surprise to start your journey with us in the form of a welcome pack.