Freelancer profile translated to English.
Back to original languageAbout Gharsallah
DevOps Consultant with solid experience in automation, CI/CD, and cloud infrastructures. Expert in Kubernetes, OpenShift, Docker, and GitOps with ArgoCD. Specializing in DevOps pipelines, observability, and application security. Passionate about teamwork, knowledge sharing, and technical challenges.
French
Native or bilingual
English
Native or bilingual
Remote only
Primarily works remotely
Experience
- PayfitDevOps Cloud Consultant – Airflow / Data Engineering AWS MigrationFebruary 2026 - May 2026 (3 months)
- Migration from the community Helm chart to the official Apache Airflow chart on Kubernetes (EKS/AWS)
- Upgrade of Apache Airflow from version 2.6.3 to 2.10.5
- Resolution of critical incidents: IRSA/IAM, ExternalSecrets, Fernet key, DAG imports, SSH keys
- ArgoCD integration for GitOps deployment
- Secret management via AWS Secrets Manager and ExternalSecrets Operator
- Collaboration with Data, Platform, and AppSec teams
- Orange Business ServicesDevOps ConsultantJuly 2024 - Today (2 years and 1 month)Infogérance of the IDFM application platform on OpenShift. Deployment automation with GitOps:• Installation and administration of ArgoCD via OpenShift Operator• Installation and administration of Gitlab and Gitlab CI• Creation and optimization of GitLab pipelines• Automated deployments with rollbacks• Environment variable management• Vault deployment via Helm for secret management with automatic rotation• DefectDojo installation with CI scans• SonarQube configuration with Quality Gates in pipelines• Nexus Repository administration with cleanup policies• Minio installation (S3-compatible Object Storage)• TLS/SSL Routes, ConfigMaps, Secrets, RBAC management• Persistent Storage (PV/PVC), StorageClasses, Resource Quotas, Network Policies• HPA configuration and deployment via Operators• Management of application Helm Charts• Grafana/Prometheus monitoring with dashboards and alerts• Log analysis and troubleshooting on pods/microservices• MCO: production incidents, level 2/3 on-call• Writing technical design documents, data flow diagramsTechnologies: OpenShift 4, GitLab CI/CD, ArgoCD, Helm 3, Vault, DefectDojo, SonarQube, Nexus, Harbor, Minio, Grafana, Prometheus, Keycloak, RabbitMQ, Zabbix
- IBMApplication DevOps Manager - ProductionAugust 2023 - July 2024 (11 months)Manager of 3 business applications on IBM Cloud. Production management, ServiceNow deployments, and level 3 technical support:• Management of non-production environments (Testing, Training, Migration)• Complete production deployments: ServiceNow changes, runbooks• CAB coordination for change validation• Deployment planning with business stakeholders and adherence to maintenance windows• Production deployments with rollback plans• Production incidents: P1/P2/P3 classification, prioritization• SLA monitoring, IOPS and Technical Office escalation• Production on-call and 24/7 support• Load testing for application sizing• Metrics analysis: response time, latency• Definition of Kubernetes resource requests/limits (CPU, memory) based on tests• Pod sizing optimization based on load• Redis cache configuration to reduce latency• Creation of standard, normal, and emergency change templates• CMDB documentation• Incident and problem tracking: investigation, resolution• IBM Cloud Kubernetes provisioning with namespaces and network isolation• Automated deployments with GitLab CI/CD and Ansible• Helm Chart optimization with IBM developers• Environment-specific configuration management• Data synchronization between environments• Dynatrace and LogDNA log analysis for production incidents• Real-time application health dashboards• Technical referent for application evolutions• Cross-functional IT steering (network, security, DB)• Code reviews and architectural recommendations• Compliance with BNP IT standards and security policies• Writing technical documentation, procedures, runbooks, API and interface documentation• Agile/Scrum participation with reportingTechnologies: IBM Cloud, Kubernetes, Java, Spring Boot, PostgreSQL, MongoDB, Redis, GitLab CI/CD, Ansible Tower, Kafka, Dynatrace, LogDNA, ServiceNow
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Education
- Engineering degree in Computer Science, Specialization: Software EngineeringÉcole Supérieure Privée d'Ingénierie et de Technologies (ESPRIT)2020Diplôme d'ingénieur en Informatique Spécialité : Génie logiciel
Certifications
- Certified Kubernetes Application Developer (CKAD)linux foundation2024
- Microsoft Certified: Azure Fundamentals AZ900Microsoft2024