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.

1️⃣ 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 Node.js / 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).

2️⃣ 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 manifest.json, 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).

3️⃣ BTP Infrastructure, Approuter & Security (IAS + AMS)

• Proven experience configuring and managing a Standalone Approuter (xs-app.json, 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.

4️⃣ 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).

5️⃣ 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.

6️⃣ 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-oriented—recognises technical nuances (example code issues, draft vs active entities, persist vs reference designs).

• Works effectively and a good team player.

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