Tunji Adeshina

Senior Cloud/DevOps Engineer

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Innovative and solution-oriented Cloud/DevOps Engineer with 10+ years of experience designing resilient, scalable, and secure cloud infrastructure. Deep expertise in AWS, Azure, GCP, Kubernetes, and Terraform. Proven track record of automating CI/CD pipelines, implementing observability at scale, managing hybrid cloud platforms, and enforcing security and compliance. Known for cross-functional collaboration, operational excellence, and reducing incident response time through monitoring, logging, and automation.


Work Experiences

Senior Cloud Engineer

Activision Publishing | 2023 - Present

Designed, built, and maintained cloud infrastructure across public and hybrid cloud environments, ensuring high availability, fault tolerance, and cost optimization. Architected and operated Kubernetes clusters in multi-tenant, hybrid setups to support scalable and resilient services.

  • Automated infrastructure provisioning using reusable Terraform modules across AWS and GCP, standardizing cloud resource deployments and improving delivery speed.
  • Built GitOps workflows using ArgoCD and Helm for declarative, auditable, and environment-aware application delivery across staging and production.
  • Modernized CI/CD pipelines using GitHub Actions with composite actions, enabling reusable, team-adoptable automation workflows adopted across 10+ engineering teams.
  • Led observability initiatives by deploying Prometheus, Grafana, and Datadog, reducing mean time to recovery (MTTR) by 25% and improving SLO adherence.
  • Managed container and artifact lifecycle using Helm and JFrog Artifactory, ensuring secure, traceable, and policy-compliant release processes.
  • Partnered with InfoSec and SRE teams to embed secrets management, access control, and audit compliance into deployment workflows.
  • Responded to production incidents as part of a 24/7 on-call rotation; led root cause analysis and implemented resilient infrastructure improvements, boosting uptime by 15%.
  • Collaborated with cross-functional teams to design and implement a hybrid cloud strategy, enabling seamless migration of on-premises workloads to AWS and GCP.
  • Hardened Linux-based systems for cloud deployments, integrating security and compliance into provisioning pipelines and runtime environments.

DevOps Engineer

Semaphore Solutions Inc, Victoria, BC | 2020 - 2023

Led the automation and replication of multi-region cloud infrastructure using Terraform, significantly improving scalability, reducing manual effort, and ensuring consistent deployments across AWS environments.

  • Engineered highly available, multi-region AWS infrastructure using modular Terraform code, enabling repeatable, version-controlled provisioning at scale.
  • Developed and enforced AWS WAF configurations via Terraform, enhancing security posture and mitigating application-layer threats for microservices.
  • Implemented CI/CD pipelines using Jenkins, Docker, and Kubernetes, reducing deployment times by 50% and enabling zero-downtime releases.
  • Integrated Prometheus and Grafana into cloud platforms to deliver real-time observability, SLO-based monitoring, and actionable alerting for critical workloads.
  • Championed a full-stack observability approach by unifying metrics, logs, and traces, which improved incident response times and reduced MTTR.
  • Designed and implemented robust monitoring systems with Prometheus for AWS EC2, ECS, and Lambda targets, incorporating SLO-driven alerting rules and Grafana dashboards to track performance and reliability.
  • Maintained secure CI/CD pipelines using Jenkins and JFrog Artifactory, supporting traceable, compliant, and audit-ready release workflows.

AWS Cloud Architect

Propitix UK Limited London, England | 2019 - 2020

Designed and implemented secure, scalable infrastructure solutions across cloud and on-premise environments, aligning with ISO 27001 standards to ensure high security, compliance, and operational excellence.

  • Architected and deployed complex cloud stacks and on-premise servers with a strong emphasis on ISO 27001 compliance, embedding security best practices into provisioning and runtime processes.
  • Modularized Terraform codebases to promote reusability, reduce duplication, and enable seamless collaboration across cross-functional engineering teams.
  • Automated microservice deployments using Jenkins, Ansible, and Helm, significantly improving release velocity, service reliability, and deployment consistency across environments.
  • Engineered scalable infrastructure to handle high-throughput workloads and stringent uptime targets, achieving 99.99% availability for mission-critical systems through resilient design and proactive optimization.
  • Implemented CI/CD pipelines using Jenkins, Docker, and Kubernetes, reducing deployment times by 50% and enabling zero-downtime releases.
  • Integrated Prometheus and Grafana into cloud platforms to deliver real-time observability, SLO-based monitoring, and actionable alerting for critical workloads.
  • Championed a full-stack observability approach by unifying metrics, logs, and traces, which improved incident response times and reduced MTTR.

Cloud Engineer

V2D Convergence Ltd Lagos, Nigeria | 2016 - 2019

Company focused on automating all homes across Africa to give every Nigeria a Smart Home experience.

  • Engineered CI/CD pipeline automation using Chef and Jenkins, deploying applications to Kubernetes with zero downtime and significantly improving deployment efficiency.
  • Designed and Maintained all Cisco Network infrastructure.
  • Led the containerization of native apps into microservices, increasing application scalability and improving resource allocation.
  • Developed company website using php and Mysql with Apache.
  • Setup and management of observability stack for logs, and traces, which improved incident response times and reduced MTTR.

Systems Administrator

V2D Convergence Ltd Lagos, Nigeria | 2010 - 2016

Responsible for design, deployment, and management of core IT infrastructure supporting over 5,000 employees.

  • Email Infrastructure Management: Configured, deployed, and maintained a scalable, Linux-based mail server solution, ensuring reliable email communication across the organization.
  • Network Security & Data Protection: Implemented and monitored network security protocols and backup solutions, significantly reducing downtime and mitigating security risks.
  • Infrastructure Scaling: Led the expansion of the company’s server infrastructure from 3 to 11+ servers within one year, enhancing performance, availability, and scalability to meet growing business needs.
  • System Optimization: Ensured high availability and optimal performance of servers and services through proactive monitoring, patching, and capacity planning.
  • Collaboration & Support: Worked closely with cross-functional teams to troubleshoot system issues and support internal users, enhancing overall IT service delivery.

Help Desk Analyst

Zain Telecoms Lagos, Nigeria | 2009 - 2010

Provided technical support and troubleshooting assistance to end-users, resolving hardware and software issues in a timely manner.