Gabriel Mmushi

DevOps Engineer with enterprise experience in CI/CD automation, cloud infrastructure provisioning, Linux administration, container orchestration, and production support within enterprise environments. Skilled in AWS, Microsoft Azure, Terraform, Kubernetes, Docker, Jenkins, Bamboo, Bitbucket, GitHub Actions, and infrastructure automation using Ansible and Shell scripting. Experienced in cloud migration initiatives, Infrastructure as Code (IaC), monitoring and logging, secure DevOps practices, and deployment optimisation for scalable enterprise systems.

Strong background supporting production-critical environments, improving deployment reliability, and collaborating across development, QA, and infrastructure teams in Agile environments.

DevOps Engineer (Consultant) at BMW IT Hub (2022-10 – Present)

• Built and maintained CI/CD pipelines using Jenkins, Bamboo, Bitbucket, GitHub Actions, and Azure DevOps
• Provisioned and managed cloud infrastructure using Terraform (Infrastructure as Code)
• Cloudified on-premise applications to AWS infrastructure utilising Terraform and containerisation technologies
• Containerized enterprise applications using Docker to standardize deployments
• Orchestrated container workloads using Kubernetes and Azure Kubernetes Service (AKS)
• Supported Linux/Unix production environments including troubleshooting incidents and deployments
• Worked with JBoss/WildFly application server environments and deployment configurations
• Improved application security and code quality by implementing CodeQL, Dependabot, and SonarQube scanning
• Monitored applications and infrastructure using AWS CloudWatch, Azure Monitor, Kibana, and Grafana
• Automated operational tasks using Shell scripting and Ansible
• Supported deployments across AWS and Microsoft Azure environments
• Migrated CI/CD pipelines to GitHub Actions improving deployment workflows and reliability
• Collaborated with development, QA, and infrastructure teams to deliver scalable enterprise solutions
• Supported microservices-based architectures and secure API deployments
• Successfully migrated enterprise workloads from on-premise infrastructure to AWS cloud environments
• Reduced manual deployment effort through Infrastructure as Code and automation practices
• Improved deployment reliability and operational consistency across environments
• Enhanced application security posture through automated code scanning and dependency management
• Improved observability and incident response using centralized monitoring and logging solutions

Java Developer / DevOps Support at First National Bank (FNB) (2020-01 – 2022-09)

• Built and supported CI/CD pipelines using Bamboo, Bitbucket, Git, and Azure DevOps
• Automated deployment processes using Ansible reducing deployment time by 99%
• Managed delivered software packages on Software Administration servers used by Bamboo and Ansible deployment pipelines
• Configured application property and configuration files according to bank-specific integration requirements
• Maintained integration points including URLs, JMS queues, database scripts, and cron job configurations for enterprise applications
• Automated database schema updates using Liquibase changelogs and changesets
• Supported Ansible playbooks used during Bamboo deployment executions
• Participated in CI/CD workflows including code commits, peer reviews, merges, Bamboo builds, release creation, and deployments to development environments
• Worked with Bamboo build agents and Ansible automation engines to support deployment orchestration
• Supported Linux-based environments and deployment troubleshooting activities
• Implemented monitoring and log analysis using Grafana, Azure Monitor, and Graylog
• Assisted production support teams in resolving reported defects and production incidents
• Supported enterprise integrations using REST and SOAP services
• Reduced deployment turnaround time through CI/CD automation initiatives
• Improved release consistency and reduced manual operational effort through Bamboo and Ansible automation
• Streamlined database deployment processes using Liquibase automation
• Enhanced production support response and defect resolution using Graylog monitoring and troubleshooting
• Improved operational efficiency within enterprise release and deployment environments

Junior Java Developer at Reverside Software Solutions (2017-08 – 2019-12)

• Supported middleware and ESB services for a client-facing insurance premiums rating application for Bryte Insurance
• Worked with TIBCO BusinessWorks (TIBCO BW) and TIBCO Administrator to support enterprise integration services
• Processed XML-based messages and integrated requests with Duck Creek for premium calculation processing
• Developed and enhanced XML tags using Java and DOM Parser according to business requirements
• Performed functional testing and validation using SoapUI against incoming broker requests and Duck Creek integrations
• Implemented changes in TIBCO BW services and deployed updates through TIBCO Administrator environments
• Assisted with deployments, production support, and troubleshooting activities across integration environments
• Worked within Linux/Unix environments supporting backend middleware systems
• Reduced application call response time from 2 minutes to 1 second by implementing database connection pooling, improving performance by 99%
• Improved enterprise integration reliability and XML message processing efficiency
• Enhanced premium calculation response times and backend system performance
• Supported stable middleware deployments and production support activities
• Reduced application bottlenecks and improved broker-facing system responsiveness

National Diploma in Information Technology – Tshwane University of Technology