Sr. SAP S/4 Hana Developers - ABAP, RAP, CDS, Fiori (A&D Transformation)

Role Overview

We are seeking multiple experienced SAP S/4HANA Developers to support a large-scale, multi-release SAP transformation program for a leading Aerospace & Defense (A&D) enterprise. This initiative represents the third major release in an ongoing migration from SAP ECC and complex legacy ecosystems to S/4HANA, led by a global systems integrator.

The program spans Finance, Procure-to-Pay (P2P), Manufacturing, and Supply Chain Management (SCM) and operates within a highly customized A&D landscape that includes COTS applications, custom engineering systems, billing platforms, and FAR/DFAR-compliant processes.

Many legacy solutions will not be replaced by S/4HANA and must instead be re-engineered to integrate cleanly with S/4 using SAP BTP and modern extensibility patterns. This role is ideal for developers who have already lived through large-scale ECC-to-S/4 transformations and understand both the technical and architectural tradeoffs involved.

Key Responsibilities

• Design, develop, and enhance custom SAP S/4HANA solutions across FIN, P2P, MFG, and SCM domains

• Lead or contribute to custom code remediation, rationalization, and redevelopment from ECC to S/4

• Develop modern S/4 extensions using:

  • ABAP OO

  • RAP (RESTful ABAP Programming Model)

  • CDS Views (Analytical and Interface Views)

  • SAP Fiori (Elements and freestyle UI5 as needed)

• Re-engineer and integrate non-SAP and COTS systems via:

  • SAP BTP

  • Integration Suite

  • APIs and event-driven patterns where applicable

• Support modernization of legacy custom objects into:

  • S/4 embedded extensions

  • BTP-based side-by-side extensions

• Collaborate with functional, integration, and architecture teams to align technical design with A&D compliance requirements (FAR/DFAR, auditability, traceability)

• Participate in release planning, technical design reviews, testing support, and deployment activities across a multi-year roadmap

Required Qualifications

• 10+ years of SAP development experience, including hands-on S/4HANA project delivery

• Proven experience on large-scale ECC to S/4HANA transformation programs (multiple releases strongly preferred)

• Strong expertise in:

  • ABAP Objects

  • RAP

  • CDS Views

  • SAP Fiori (Elements and UI5)

• Experience integrating complex legacy and third-party systems with S/4 via SAP BTP

• Solid understanding of custom code adaptation strategies (simplification item impacts, SPAM, CVI, etc.)

• Experience working in A&D or other highly regulated industries

• Ability to work independently in a distributed, remote team environment

Preferred Experience

• Prior A&D client experience with FAR / DFAR-driven processes

• Exposure to:

  • SAP Integration Suite

  • Event-based integration patterns

  • Clean Core principles

• Experience supporting long-running transformation programs with evolving architecture standards

• Familiarity with DevOps, transport automation, and modern SAP delivery models

Why This Role

• Join a mission-critical, multi-year SAP S/4HANA transformation

• Work on complex, real-world A&D systems that go far beyond textbook SAP

• High visibility program with strong extension potential for top performers

• Opportunity to shape modern SAP extensibility patterns at enterprise scale