Senior sap abap developer

Senior SAP ABAP Developer
Location: Lisbon (Hybrid – 2–3 days onsite per week) Job Type: Full-Time or Contractor (long-term)
About the Role We are looking for a Senior SAP ABAP Developer to join an international and dynamic SAP delivery team. In this role, you will be responsible for the end-to-end technical design and delivery of robust, scalable SAP solutions across ECC and S/4 HANA landscapes. You will play a key role in solution architecture, high-quality development, performance optimization, integrations, and production support, ensuring alignment with enterprise standards and business objectives.
Key Responsibilities Development & Architecture
Lead the design and implementation of complex ABAP solutions (Classical & OO ABAP), including reports, enhancements, forms, and reusable frameworks.
Develop modern S/4 HANA solutions using CDS Views, AMDP, and RAP (ABAP RESTful Application Programming Model) . Implement enhancements using User Exits, BADIs, Enhancement Framework, and BAPIs to meet business requirements. Integration & Interfaces Design, build, and support interfaces using IDocs, RFCs, OData services, and SOAP/REST APIs . Collaborate with PI/PO and CPI teams to ensure reliable middleware orchestration. Monitor interfaces, manage errors, and ensure secure and consistent data exchange. Performance & Quality
Perform advanced debugging, root-cause analysis, and performance tuning (ST05, SAT, SQL optimization).
Ensure compliance with ATC and Code Inspector standards. Define and contribute to unit and integration testing strategies, including automation where applicable. Leadership & Collaboration Mentor junior developers, conduct code reviews, and promote clean ABAP and SOLID principles. Work closely with functional consultants, architects, and product owners within an Agile delivery environment (planning, refinement, reviews). Required Skills & Core Competencies Strong expertise in OO ABAP , CDS Views , AMDP , and RAP on S/4 HANA. Extensive experience with IDocs, BAPIs, OData services, and API-based integrations . Advanced knowledge of performance tuning, memory management, and SQL optimization.
Solid understanding of Fiori/UI5 backend integration , including OData services and annotations. Proficiency with SAP transport management and quality tools (ATC, SCI, SAT, ST05 ). Continuous improvement mindset with experience in post-incident reviews and delivery optimization.
Hands-on involvement across multiple full lifecycle SAP implementations . Qualifications
Bachelor's degree in Computer Science, Engineering, or a related field.
8+ years of SAP ABAP development experience , including S/4 HANA projects. Proven leadership in complex delivery environments.
Advanced English (C1 or higher) – mandatory, as stakeholders are part of an international team. Preferred Attributes Exposure to SAP functional domains such as FI/CO, MM, SD, PM . Experience with Dev Ops practices (CI/CD for ABAP, Git-enabled CTS, test automation). Knowledge of security-by-design , authorizations, and data privacy principles. Familiarity with SAP BTP, CAP , and cloud or event-driven integration patterns.
Why Join Us?
Work on challenging, enterprise-scale SAP S/4 HANA initiatives.
Collaborate with international stakeholders in a modern Agile environment.
Hybrid working model with flexibility and strong team culture.
Long-term career growth and technical leadership opportunities.
Apply now to jobs@optiwisers.com and be part of an exciting opportunity to elevate your career.