Feyz Sarı
Cloud & DevOps Engineer
5+ years of expertise in AWS, Kubernetes, Terraform, and CI/CD automation. Proven track record of reducing cloud costs by up to 94% while improving security scores from 34 to 87. Specialising in building scalable, secure, and cost-efficient cloud platforms.
Cloud Cost Optimization
Achieved dramatic cloud cost reductions: 2025 Results
AWS Security Hub
Increased scores from 34 to 87 across four accounts by implementing 160+ security improvements and best practices.
CI/CD Management
Leading management of 100+ CI/CD pipelines across GitHub Actions, Jenkins, and CircleCI with maximum reliability.
Professional Summary
Cloud Platform & DevOps Engineer with 5+ years of hands-on experience designing and operating secure, scalable, and cost-efficient AWS platforms. Specialised in EKS, Kubernetes, Terraform, CI/CD automation, and cloud security.
My focus is on providing hassle-free, fully automated development and production environments where engineering teams can concentrate on their product — while staying secure and cost-optimised. I work best at the intersection of infrastructure reliability, developer experience, and financial responsibility.
I've supported five engineering teams concurrently at Sainsbury's, architecting across 50+ services and 4 production applications. I write about cloud practices on LinkedIn and believe that simplicity is the highest form of architecture.
Work History
A track record of delivering infrastructure that scales, saves, and secures.
- Working in an Agile environment supporting five software engineering teams across production and non-production environments
- Architecting and managing 50+ services, 4 applications, and 30+ tooling components
- Managing four EKS clusters using Terraform modules with autoscaling workloads
- Leading 100+ CI/CD pipelines across GitHub Actions, Jenkins, and CircleCI
- Implemented 160+ cloud security improvements, increasing AWS Security Hub scores from 34 to 87
- Delivered FinOps-driven solutions achieving cost reductions of 94% and 74% across two accounts
- Worked in an Agile DevSecOps team within a Finance/Banking fintech start-up
- Built complete backup and disaster recovery infrastructure using Terraform, EC2, and S3
- Created Jenkins pipeline with Ansible for automated user management — 99% faster than the manual process
- UK-Edutest: Delivered cloud infrastructure for an online GCSE education platform
- Moxvio: Implemented auto-stop/start scheduling for Windows servers, reducing costs by 25%
- Keyword Education: Built hybrid infrastructure achieving 85% cloud cost savings
- Managed desktop technical support as 1st and 2nd line engineer
- Developed end-user self-service documentation, reducing inbound service requests by 30%
- Co-managed a customer support restructure, contributing to 10% year-on-year revenue growth
Technical Skills
Tools and technologies I work with daily.
Certifications
Cloud and infrastructure credentials
Articles & Thinking
Sharing lessons from the field on cloud, DevOps, and platform engineering.
Cloud cost optimisation isn't about cutting corners — it's about understanding usage patterns, eliminating waste, and building guardrails so savings are sustainable over time.
Keep Kubernetes simple. Use it for what it's best at — scheduling stateless workloads — and move everything else out. Complexity is a liability.
Security is not a gate at the end of the pipeline — it's a shared responsibility embedded throughout. Lessons from implementing 160+ security improvements at Sainsbury's.
Get In Touch
Let's discuss how I can help with your cloud infrastructure needs.