18.06.2026 aktualisiert

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Java / Spring Boot Engineer | SAP Integration | Kubernetes & OpenShift

Mannehim, Deutschland
Deutschland +4
info: Deutschland, Österreich, Schweiz, Frankreich, Belgien
Angewandte Informatik (B.Sc.)
Mannehim, Deutschland
Deutschland +4
info: Deutschland, Österreich, Schweiz, Frankreich, Belgien
Angewandte Informatik (B.Sc.)

Profilanlagen

abdullah-alrefai-cv_abdullah-alrefai-2026-06-15-freelancermap.pdf

Über mich

Passionate Senior Software Engineer & DevOps Specialist with strong Java/Spring background. I build reliable, scalable solutions with focus on cloud, automation & efficiency.

Skills

OAuth 2.0KeycloakArgo CDHelmJavaAutomatisierungComplianceContinuous DeliveryContinuous IntegrationElasticsearchGitHubSkalierbarkeitInfrastrukturVersicherungenJava EE Connector ArchitectureJava Database ConnectivitySpring FrameworkJava API For Restful Web ServicesPostgreSQLApache MavenOAuthOpenShiftSamlSAP CRMSAP ImplementierungSQLWeb Application FrameworkDocker ContainerSAP Business ConnectorSpring CloudSpring BootInfrastructure as Code (IaC)GitLabGitlab-CiGit FlowKubernetesRancherGithub EnterpriseRestful ApisDockerJenkinsMicroservices
Backend engineer with a Java/Spring Boot core, specialised in SAP integration and microservices for the insurance and finance sectors. I securely connect internal enterprise systems (SAP CRM, SAP PI, advisor portals) with external SaaS platforms and ship them cloud-native on Kubernetes and OpenShift. I own projects end to end, from requirements engineering to production deployment with CI/CD.

Core Focus
  1. Java / Spring Boot backend development (since 2017)
  2. Microservices & REST/SOAP APIs
  3. SAP integration (SAP CRM, SAP PI)
  4. Secure data integration: SSO, OAuth2, SAML
  5. Cloud-native delivery: Kubernetes (GKE), OpenShift, Helm
  6. CI/CD & DevOps
  7. Domain focus: insurance & finance
Programming Languages
  1. Java (Expert), Python, Golang, SQL, JavaScript, Bash
Frameworks & Libraries
  1. Spring Boot, Spring Cloud, Spring Security, Spring Data JPA, Hibernate, Jakarta EE, GraphQL
Enterprise Integration
  1. SAP CRM, SAP PI, REST, SOAP, SSO, OAuth2, SAML
Containers & Cloud
  1. Docker, Podman, Kubernetes, OpenShift, Rancher, Helm
DevOps & CI/CD
  1. Jenkins, ArgoCD, FluxCD, CircleCI, Maven, Gradle
Infrastructure as Code
  1. Pulumi, Terraform, OpenTofu, Terragrunt
Databases
  1. PostgreSQL, MySQL, MongoDB, Redis, Elasticsearch
Monitoring
  1. ELK Stack, Prometheus, Grafana
Certifications
  1. Certified Kubernetes Application Developer (CKAD) – CNCF
  2. Red Hat Certified Specialist in OpenShift Administration (EX280)

Erfahrung

Berufserfahrung5 - 10 Jahre
Freelancer seit2025

Sprachen

ArabischMutterspracheDeutschverhandlungssicherEnglischverhandlungssicher

Projekthistorie

DevOps Engineer

FABBricate IT Solutions GmbH

Internet und Informationstechnologie

Fachlicher Schwerpunkt: Infrastructure as Code, Cloud-Infrastruktur-Automatisierung, DevOps

Tätigkeiten:
  1. Konzeption und Aufbau einer vollständigen Cloud-Infrastruktur von Grund auf mittels Pulumi (Infrastructure as Code)
  2. Definition und Provisionierung von Cloud-Ressourcen (Netzwerke, Subnetze, Firewalls, Compute-Instanzen, Storage-Buckets) als typsicherer Code in TypeScript
  3. Aufbau und Konfiguration von Kubernetes-Clustern (GKE) über Pulumi-Stacks
  4. Verwaltung von Umgebungen (dev, staging, prod) über separate Pulumi-Stacks mit gemeinsamer Codebasis
  5. Konfiguration von Secrets-Management und IAM-Rollen über Pulumi
  6. Versionierung der gesamten Infrastruktur in Git; nachvollziehbare Änderungshistorie durch Pull-Request-Workflows
  7. Integration der Pulumi-Pipelines in GitLab CI/CD für automatisierte Infrastruktur-Deployments
  8. Dokumentation der Infrastrukturarchitektur
Technologien/Tools: Pulumi (TypeScript), Terraform, Ansible, Kubernetes (GKE), Docker, GitHub CI/CD, Git, Linux (RHEL/Ubuntu)

Architect / Senior Backend Developer

SHE IT AG

50-250 Mitarbeiter

  1. Development of a secure identity & data integration layer (Thinksurance Loginhandler)
  2. Implemented Spring Boot service for SSO authentication, authorization, and data transfer
  3. Integrated SAP CRM to map advisor and customer records into Thinksurance SaaS platform
  4. Built REST endpoints for portals and CRM systems, deployed via Kubernetes (GKE + Helm)
  5. Developed CI/CD pipelines with Jenkins and ensured compliance in data security

Architect / Senior Backend Developer

SHE IT AG

50-250 Mitarbeiter

  1. Developed Mortgage Integration Gateway (HYPGW) between advisor portal and external system (Interhyp)
  2. Implemented OAuth2 / SAML SSO workflows with Entra ID for seamless user login
  3. Integrated SAP CRM & SAP PI for permissions and customer data retrieval
  4. Built Jenkins CI/CD pipeline and deployed containerized applications in GKE
  5. Enabled real-time mortgage process initiation, reducing onboarding time from minutes to seconds

Architect / Full-Stack & DevOps Engineer

SHE IT AG

50-250 Mitarbeiter

  1. Replacement of 15-year-old legacy platform with a modern container-based file transfer solution (Webtrans 2.0)
  2. Designed overall system architecture and automated SFTP → Nextcloud integration
  3. Built CI/CD pipeline with Jenkins; prepared migration from Podman to Kubernetes (Helm)
  4. Implemented fallback & recovery strategies for high availability and data integrity
  5. Delivered monitoring setup, performance optimization, and documentation

Architect / Full-Stack Developer

SHE IT AG

50-250 Mitarbeiter

  1. Designed and deployed cloud-native microservices for automated insurance document import
  2. Integrated REST/SOAP APIs with electronic client archive (EKA) and print services
  3. Implemented antivirus scanning, error handling, job retry mechanisms, and structured logging
  4. Automated document merging and delivery workflows with 99.9% success rate
  5. Reduced manual workload by 90% through end-to-end automation

Software Engineer

SHE IT AG

50-250 Mitarbeiter

  1. Developed Java-based automation tool (ResourceGuru Exporter) for forecasting and reporting
  2. Integrated Resource Guru and Navision APIs to process booking, vacation, and pricing data
  3. Automated generation of CSV/Excel reports and delivery via internal file server
  4. Implemented scheduled jobs and Slack notifications for transparency
  5. Reduced manual Excel work and improved accuracy of monthly forecasts

Zertifikate

Certified Kubernetes Application Developer (CKAD)

Linux Foundation

2025

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