SAP BTP Backend Developer

Role: SAP BTP / CAP Full-Stack Engineer (Fiori Elements CAP CDS Integration)

Context: SAT (Supplier Allocation Tool) solution on SAP BTP using CAP backend Fiori Elements (V4) with Flexible Programming Model IAS (Identity Authentication Service) AMS (Authorization Management Service) CPI / S4HANA integration HTML5 App Repository and Standalone Approuter.

Purpose:
To design develop and secure end-to-end BTP applications covering CAP domain models Fiori Elements UIs security integration with IAS/AMS and connectivity to S/4HANA and CPI services.

CAP & CDS Modeling

• Strong expertise in SAP Cloud Application Programming Model (CAP).

  • Proven experience designing and implementing domain models in CDS (entities associations compositions views projections).

  • Hands-on delivery of draft-enabled OData V4 services with active/draft entity modeling late ID generation transactional save/discard flows and conflict handling aligned to Fiori Elements draft UIs.

  • Custom logic implementation using / TypeScript handlers (CREATE UPDATE DELETE ACTIONS).

• Modeling on replicated S/4HANA data in SAP HANA Cloud (external schemas / synonyms) while maintaining decoupled performant CAP models.

• Ability to design normalized scalable data schemas separating master transactional and technical entities.

• Apply HANA push-down and performance optimization (indices pagination projection vs consumption views).

Fiori Elements (V4) with Flexible Programming Model & UI Modeling

• Hands-on experience developing Fiori Elements (V4) apps (List Report Object Page Analytical) backed by CAP services.

• Use CDS / OData annotations (UI ValueHelp SelectionFields FieldGroup Identification SideEffects Draft etc) to design and develop feature-rich UIs with minimal custom code.

• Configure inline editing mass actions value helps side effects and message handling.

• Ensure draft-aware non-blocking save/discard flows consistent with Front End behaviour.

• Deep understanding of routing dataSources and model binding.

• Experience integrating apps into BTP Launchpad / Work Zone and embedded S/4 FLP.

• Implement role-based UI adaptations using AMS policies (authorization-driven field visibility and actions).

BTP Infrastructure Approuter & Security (IAS AMS)

• Proven experience configuring and managing a Standalone Approuter ( routes destinations HTML5 Repo).

• Set up and consume BTP Destinations with IAS-based authentication and principal propagation to CAP.

• Understanding of:

  • IAS as IdP and AMS as centralized authorization layer.

  • Secure routing patterns for Fiori Elements apps calling CAP via approuter.

  • Destination: OAuth2 grant types (OAuth2JWTBearer OAuth2UserTokenExchange) and App-to-App SSO patterns.

• Apply authentication and authorization checks at both CAP service and Fiori levels.

• Configure apps in BTP Work Zone (tiles target mappings role collections) and collaborate with the Identity Management team for IAS/AMS-based role assignment.

Integration & Connectivity (CPI / S4HANA)

• Proven experience consuming S/4HANA APIs (OData / REST) through BTP Destinations.

• Design and implement robust CAP CPI interfaces for data publishing to S/4HANA (1:1 API calls payload validation status tracking).

• Handle asynchronous integration scenarios (correlation IDs callbacks error logging).

Quality Operations & Lifecycle

• Hands-on experience implementing unit and integration tests for CAP services.

• Design technical / audit logging correlation ID propagation and error messaging (OData V4 Fiori Elements).

• Manage environment configuration (VCAP service bindings destinations).

• Understanding to CI/CD setup working experience with GITHUB.

Behavioural / Ways of Working

• Simplifies designs without over-engineering (e.g. status models publish flows).

• Communicates clearly with architects functional consultants security CPI and S/4 teams.

• Detail-orientedrecognises technical nuances (example code issues draft vs active entities persist vs reference designs).

• Works effectively and a good team player.

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