Senior Back End Developer

As a Senior Back-End Developer, you will play a key role in designing and building digital solutions that support both internal and external customers. You'll work within the BSS Development team, collaborating closely with developers, product colleagues, and business partners to deliver stable, scalable, and high‑performing applications. In this role, you will: Develop applications and services as part of an Agile squad, contributing to iterative delivery cycles. Build and optimize backend interfaces and services exposed to internal and external consumers. Write clean, reusable, efficient, and well‑documented code. Design and implement low‑latency, high‑availability, and high‑performance applications. Integrate multiple data sources, systems, and databases into unified solutions. Develop user authentication and authorization mechanisms across various systems and environments. Understand and apply fundamental design principles for scalable and maintainable backend systems. Collaborate with cross‑functional colleagues to ensure smooth operation of integrated services. Monitor, troubleshoot, and resolve production issues. Actively support interoperability between applications and platforms. Own the technical deliverables agreed within the squad during planning sessions. Mentor junior members, promoting continuous learning and technical excellence. Contribute to ongoing improvements of processes, standards, and technical practices within the squad. You are a passionate and experienced backend engineer who enjoys solving complex problems, building robust systems, and collaborating in a dynamic Agile environment. You're committed to quality, continuous learning, and driving improvements in both technology and teamwork. At least 4 years of experience in software development (Java / JEE). Strong experience designing and implementing multi‑layer applications using Spring MVC and Spring Boot. Experience working with RESTful APIs and SOAP services. Good understanding of application servers such as Weblogic, JBoss, Tomcat. Hands‑on experience with JEE technologies (CDI, EJB, JPA, JMS, JTA, JSP, JSF, JAX‑WS, JAX‑RS). Knowledge of security standards such as OAuth and OIDC. Experience with relational databases (MariaDB, MySQL, PostgreSQL) and NoSQL databases (MongoDB, Redis). Experience working in an Agile environment (Scrum, SAFe) with tools like JIRA and Confluence. Bachelor's degree in a technical field (mandatory). Technical certifications (optional but appreciated).