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!
We are looking for an experienced Senior Backend Developer who will join a long-term project for our client in the banking industry.
This position follows a hybrid work model, with 3 days per week in the Warsaw office.
What you will do:
- Develop and maintain backend services and RESTful APIs using Java or .NET.
- Design data models and integrate with relational and NoSQL databases to support portal functionality.
- Collaborate with front-end developers to define API contracts and ensure seamless integration.
- Build, deploy, and manage services in containerized environments using Docker, Kubernetes, or OpenShift.
- Implement secure coding practices, automated testing, and CI/CD pipeline integration.
- Optimize application performance, scalability, and reliability.
- Troubleshoot and resolve production issues, participating in on-call and support rotations as needed.
- Contribute to Agile ceremonies, sprint planning, and technical design discussions.
What are we looking for:
- 8+ years of backend software development experience with strong expertise in Java or .NET.
- Strong hands-on experience with Spring Boot or .NET Core.
- Proven experience building and consuming RESTful APIs.
- Experience working with containerized applications and orchestration platforms such as Docker, Kubernetes, or OpenShift.
- Strong SQL and database experience, including relational data modeling and query optimization.
- Familiarity with CI/CD pipelines, automated testing, and software delivery best practices.
- Experience with messaging and event-driven architectures (e.g., Kafka, MQ) is a plus.
- Previous experience in financial services, fund administration, or transfer agency environments is an advantage.
- Exposure to cloud-native development practices is preferred.
Perks and benefits (our offer):
- Comprehensive benefits - enjoy Udemy for Business, private medical care, Multisport card, veterinary package, language lessons, and shopping vouchers.
- Flexibility - adaptable working hours and remote/hybrid work options to suit your lifestyle & location.
- 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.