Summary
✨ AI‑Generated
A technology services provider is seeking a senior backend developer to create and maintain enterprise applications. The role includes API development, database integration, containerized deployments, and secure software engineering practices.
Highlights
Join a long-term enterprise project with opportunities to build secure backend services and work with modern development practices.
Description
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.
