06/16/2026 updated
100 % available
Senior SAP CAP Java Developer
Wroclaw, Poland
Worldwide
Computer Science, Bachelor's degreeAbout me
Senior SAP CAP Java Developer based in Poland, 2+ years on SAP BTP. Specialized in CAP Java, CDS, OData v4, HANA, Cloud Foundry. Open to freelance B2B contracts across Europe. Fluent in English.
SAP CAPCloud FoundrySAP HANASpring BootSAP BTPSAP FioriSAP UI5
Senior SAP CAP Java Developer with 6+ years of experience in enterprise backend development, including 2+ years on SAP BTP. Currently delivering an internal SAP SE product — a multi-tenant SaaS Data Quality platform on BTP (Cloud Foundry) for S/4HANA migration projects.
? Key Strengths:
✔ Deep knowledge of SAP CAP (Java), CDS modeling, OData v4, and SAP HANA
✔ Extensive experience with SAP BTP, Cloud Foundry, and multi-tenant SaaS architecture
✔ Building and integrating OData services, REST APIs, and event-driven solutions using Kafka
✔ Strong focus on clean code, integration testing, and CAP service handler design
✔ Experience with S/4HANA integration patterns, CALM LMS sync, and BTP Destination Service
Proficient in SAP BTP ecosystem including CAP Java, CDS, Cloud Foundry, MTA deployments, and XSUAA security. Currently delivering a multi-tenant Data Quality platform helping enterprise clients prepare for S/4HANA migration.
Available for freelance B2B contracts — remote, Europe. ?
Experience
Professional experience5 - 10 years
Freelancer since2026
Languages
EnglishFluentPolishGoodRussianNative speaker
Project history
Delivering backend features for a multi-tenant SaaS Data Quality platform on SAP BTP (Cloud Foundry) using CAP Java, supporting S/4HANA migration KPI collection across enterprise tenants. Refactored CDS-level feature toggle architecture, engineered a zero-downtime database backfill migration job, integrated external SAP systems via OData and REST APIs, wrote integration tests for OData v4 services, resolved production issues using Kibana, and implemented SAP Fiori Elements backend logic including Value Help components and OData annotations.
Developed and maintained backend services using SAP CAP Java, CDS, and OData v4 on SAP BTP. Integrated external systems via REST APIs using MTA-based destination configuration, migrated CAP application to a newer framework version, resolved technical debt, applied Template Method design pattern for a reusable filtering framework, and collaborated with cross-functional teams in SAP-based enterprise projects.
Developed backend services for a large-scale international platform (Ancestry) using Java and Spring Boot. Designed and implemented REST APIs, built cloud-based solutions using AWS (S3, AWS Lambda), participated in database design and normalization, implemented resilience patterns such as Circuit Breaker, optimized SQL queries, worked within a microservices architecture, resolved production issues, contributed to CI/CD pipeline migration from Jenkins to Harness, and introduced caching mechanisms to improve performance.