Stewart Campbell

Lead DevOps Engineer with 10 years architecting and operating AWS platforms for high-traffic e-commerce and enterprise workloads. Currently manage 46 AWS accounts across multi-tenant infrastructure serving major UK top 100 retailers, maintaining 99.99% uptime while processing millions of orders annually. Delivered 20% cost reduction on £600k annual cloud spend (£120k/year savings) and cut container scaling time 40× (20 minutes to 30 seconds). Strong security and compliance track record while mentoring development teams and maintaining production reliability.

I specialise in AWS cloud infrastructure, designing and delivering resilient multi-tenant architectures for enterprise and e-commerce businesses with centralised governance, automated deployment pipelines, and comprehensive security controls. My approach embeds DevSecOps practices throughout the infrastructure lifecycle, with proven success achieving PCI DSS, ISO 27001, and GDPR compliance while maintaining performance under peak load. I architect solutions using infrastructure as code (Terraform, CloudFormation), container orchestration (ECS, 500+ containers), and serverless technologies (Lambda, Step Functions, EventBridge) for scalable, automated operations.

Financial efficiency drives my FinOps initiatives, where I optimise cloud spend through reserved capacity planning, usage analysis with Athena, and waste elimination strategies. I've managed £600k annual Amazon Web Services budgets, implementing cost governance across multi-account environments. Monitoring and observability are central to my approach, integrating CloudWatch, New Relic, and PagerDuty to ensure reliability and rapid incident response. I load-test for 10× traffic capacity using Grafana k6, preparing systems for peak events while maintaining site reliability engineering principles.

Beyond the technical, I mentor engineers and guide teams to adopt modern DevOps practices. I believe strong leadership, clear documentation, and knowledge-sharing are as important as technical delivery. My goal is always to build cloud infrastructure that is secure, cost-efficient, and ready to scale with business demand. I maintain on-call rotations, manage vulnerability remediation using Trivy and Checkov, and drive security hardening initiatives that reduce Security Hub findings to near-zero.

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Other experience includes: AWS (Control Tower, AWS Organizations, Landing Zones, EC2, RDS, S3, DynamoDB, IAM, WAF, CloudFront, Route53, VPC, KMS, ECR, API Gateway) | Ansible, Python, Bash | GitHub Actions, CircleCI, CodePipeline | Docker | Linux | MySQL