Kindgeek is looking for an experienced and thoughtful Senior Java Developer who brings depth, curiosity, and craft to every line of code. Your mission will be to help build a product from scratch, working closely with both the team and the client — making technical decisions that matter and owning them with confidence. This is a role for someone who doesn't just write code, but shapes solutions. We're looking for a Senior Java Developer who has: 5+ years of relevant experience in the IT industry; Strong knowledge of Java Core, OOP/OOD, and design patterns; Hands-on experience with the Spring Framework (IoC, templates) and ORM/Hibernate (Spring Data JPA); Solid SQL knowledge and experience with at least one RDBMS; Practical understanding of microservice architecture patterns; Experience working with REST and SOAP APIs; Experience with message brokers, particularly Kafka; Hands-on experience with AI tools in practice: using LLMs for coding assistance, integrating AI APIs, or building AI-powered features — not just awareness, but regular use; Experience in fintech or banking domain — understanding of financial processes, compliance considerations, or payment systems; Upper-intermediate or higher English level — able to communicate ideas, designs, and documentation clearly and concisely. Will be a plus: Experience with Vault for secrets management; Familiarity with Kubernetes, Terraform, and Helm. As a Senior Java Developer, you will: Contribute to implementing solution code with great attention to detail while fulfilling Java development best practices; Write reusable and testable code, create functional and practical technical documentation; Work closely with other team members and the client to implement designs – we are developing a product from scratch. Thus we communicate directly with the management of the client company; Proactively address technical issues and risks that could impact the project schedule and integrity of the application environment. ABOUT PROJECT The client is a UK-based Fintech mobile-first business that cooperates with influential UK banks and companies by providing digital and physical credit cards and other financing services. The application grants a straightforward yet secure credit management system devoid of bureaucratic hustle. The solution is simple on the surface yet complex “under the hoof” –– with security measures that ensure the protection of sensitive data. Being a white-label solution, the application grants flexibility and the opportunity to customize the platform for the client’s customers.