Senior / Lead Developer - Core Data Services (SAP BTP) (m/f/d)

Innovation is and will always be the core of SAP Fioneer, and it is the promise of why we were spun out of SAP: agility, innovation, and delivery.
SAP Fioneer builds on a heritage of outstanding technology and a deep understanding of corporate and consumer demands. At the heart of it all it is simple: We bring financial services to the next level with innovative software solutions and platforms.
We are helping companies in the financial services industry to achieve speed, scalability, and cost-efficiency through digital business innovation, cloud technology, and solutions that cover banking and insurance processes end-to-end.
A global company, with rapid growth, innovative people, and a lean organization makes SAP Fioneer a place where you accelerate your future!
About the Role
Join us in shaping the next generation of digital customer experiences in the financial services industry. As a Senior / Lead Developer for Core Data Services, you will drive technical architecture decisions, lead implementation activities on SAP Business Technology Platform (SAP BTP), and help deliver scalable, secure, and future-ready solutions in a highly collaborative environment.
In this role, you will take end-to-end technical ownership for Core Data Services development within a large-scale customer portal transformation program. You will combine hands-on development with technical leadership, guiding architecture decisions, mentoring developers, and ensuring the successful delivery of SAP BTP-based solutions through to go-live.
Key responsibilities
Lead the design and development of Core Data Services for customer-facing portal applications on SAP BTP and SAP RISE, following Clean Core principles.
Define and maintain technical and architecture concepts, support quality gates, and ensure alignment with project and enterprise architecture standards.
Design and implement modular services using the ABAP RESTful Application Programming Model (RAP) and Cloud Application Programming Model (CAP), including integrations through the SAP BTP Integration Suite.
Establish secure authentication and authorization concepts, including XSUAA, role management, and access control frameworks.
Provide technical leadership to the development team through code reviews, mentoring, release governance, documentation, and deployment readiness activities.
Requirements
Several years of hands-on software development experience on SAP BTP, ideally within Clean Core transformation projects.
Proven expertise with RAP and/or CAP and the development of enterprise-grade cloud applications.
Strong knowledge of authentication, authorization, and security concepts on SAP BTP, including XSUAA and role-based access management.
Practical experience with Artificial Intelligence (AI) solutions, Agentic AI concepts, and Human-in-the-Loop implementation approaches.
Demonstrated ability to take ownership of architecture and solution design, while leading delivery within agile development teams.
Nice to have
Deep expertise in AI-enabled solutions and services on SAP BTP.
Experience with SAP RISE, SAP BTP Integration Suite, and API management capabilities.
Previous experience leading small development teams within banking, public funding, or regulated financial environments.
German language skills.
Benefits
You will have the opportunity to collaborate with some of the brightest minds in the industry on an incredibly ambitious project to shape the ever-evolving financial sector. This is an environment where you can have it all — the agility, enthusiasm, and dynamism of a start-up, combined with the established expertise, solid market presence, and extensive customer network of a more established organization.
At SAP Fioneer, you will benefit from a flexible work environment that encourages creativity and empowers you to think outside the box, bring new ideas to the table, and challenge the status quo. You will become part of a diverse and global team that we are proud of and are constantly growing and reinventing. As an employee, you can chart your career path and take advantage of competitive compensation packages and progression opportunities based on merit.
We offer a comprehensive benefits package that includes occupational pension provisions, support for health and wellbeing, various mobility options like bike leasing and transportation allowances, as well as additional perks such as celebration rewards, jubilee recognition, and relocation reimbursement.

Work arrangement
No