Senior FullStack Developer (Java, Angular) w Warszawa, Polska

About the Project We are looking for an experienced Senior FullStack Developer to join an international team working on a large-scale corporate banking platform. The application enables corporate clients to manage accounts, execute payments and transfers, handle files and confirmations, and perform a variety of banking operations through a secure online portal. As part of the development team, you will be responsible for maintaining and enhancing a business-critical application, including the delivery of new features, bug fixes, production incident resolution, and implementation of regulatory and business-driven changes. The system consists of both microservices and monolithic components. The team is currently on a modernization journey, gradually transforming the existing platform into a more modern architecture. The working language is English, and the team follows SAFe Agile principles. Responsibilities Design and implement backend services based on business and technical requirements. Develop and maintain REST APIs. Contribute to frontend development using Angular. Write and maintain unit tests. Analyze, maintain, and enhance existing code, including legacy components. Collaborate with cross-functional and international teams. Participate in system modernization and architectural improvements. Support production systems and troubleshoot issues when required. Requirements Must Have 5+ years of commercial experience with: Java 7/8 Spring Framework Spring Boot Maven SQL Git JSP JavaScript Experience in designing and developing REST APIs. Experience in backend service design and implementation based on specifications. Strong understanding of unit testing practices. 2+ years of experience with: Angular Jasmine Experience working in an Agile environment. Willingness to analyze and work with legacy code. Strong communication and collaboration skills. Fluent English (spoken and written). Nice to Have Knowledge of SOLID principles. Familiarity with software design patterns. What We Offer Opportunity to work on a large-scale enterprise platform within the financial sector. Participation in system modernization and transformation initiatives. International and collaborative work environment. Long-term cooperation in a stable project. Exposure to both modern and legacy technologies. Real impact on technical solutions and product development.