Chimbu Chinnadurai
Senior Cloud Architect II
☸️ Battle-tested Kubernetes Operator 🤫
I've probably debugged a Kubernetes issue in more time zones than I care to count. Based in London, I help engineering teams across EMEA get their clusters to behave — and actually understand why they misbehaved in the first place.
I write, speak, and guest on podcasts about all things cloud-native. Away from the terminal: I enjoy cooking almost as much as simplifying overly complex systems.
- Kubernetes
- GCP
- AWS
- Kubestronaut
- Cloud Native
- Networking
- AI
- DevOps
- FinOps
My Certifications
AWS Certified Advanced Networking – Specialty
AWS (last renewed/obtained: Jan 11, 2020)
Renewable as of January 11, 2023
CNCF Certified Kubernetes Administrator (CKA)
CNCF (last renewed/obtained: Feb 2, 2026)
Expires Feb 2, 2028
CNCF Certified Kubernetes Application Developer (CKAD)
CNCF (last renewed/obtained: Feb 9, 2026)
Expires Feb 9, 2028
CNCF Certified Kubernetes Security Specialist (CKS)
CNCF (last renewed/obtained: Mar 16, 2025)
Expires Mar 16, 2027
CNCF Kubernetes and Cloud Native Associate
CNCF (last renewed/obtained: Apr 14, 2024)
Expires Apr 14, 2027
CNCF Kubernetes and Cloud Security Associate (KCSA)
CNCF (last renewed/obtained: Apr 23, 2024)
Expires Apr 23, 2027
CNCF Kubestronaut
CNCF (last renewed/obtained: Apr 29, 2024)
Expires Dec 31, 2034
CNCF Prometheus Certified Associate (PCA)
CNCF (last renewed/obtained: Oct 4, 2022)
Renewable as of October 4, 2025
Tetrate Certified Istio Administrator
CNCF (last renewed/obtained: Nov 9, 2022)
Renewable as of November 8, 2025
Google Cloud Authorized Trainer
Google (last renewed/obtained: Oct 25, 2022)
Expires Dec 31, 2049
Google Cloud Professional Cloud Architect
Google (last renewed/obtained: Dec 30, 2025)
Expires Dec 30, 2027
Google Cloud Professional Cloud DevOps Engineer
Google (last renewed/obtained: Jan 22, 2026)
Expires Jan 22, 2028
Google Cloud Professional Cloud Network Engineer
Google (last renewed/obtained: Jun 1, 2026)
Expires Jun 1, 2028
Google Cloud Professional Cloud Security Engineer
Google (last renewed/obtained: Mar 11, 2024)
Renewable as of April 1, 2026
Hashicorp Certified Terraform Associate
Hashicorp (last renewed/obtained: Aug 21, 2023)
Renewable as of August 21, 2025
Hashicorp Certified Vault Associate
Hashicorp (last renewed/obtained: Feb 10, 2023)
Renewable as of February 10, 2025
Hashicorp Certified Vault Operations Professional
Hashicorp (last renewed/obtained: Feb 10, 2023)
Expires Dec 31, 2050
Other Certificate
Other (last renewed/obtained: Mar 6, 2024)
Expires Mar 6, 2027
What my customers say
Brilliant support and super fast
appspace.com · Jun 2026
What I'm writing
GKE Active Buffer: Eliminate Node Provisioning Delays
GKE's new Active Buffer feature eliminates node provisioning delays by maintaining warm capacity, reducing scale-out latency from minutes to seconds.
Kubernetes DRA GPU Scheduling: End Node Hunting for AI Workloads
Kubernetes DRA eliminates manual GPU node hunting by introducing intelligent, request-based allocation for complex AI workloads with mixed hardware requirements.
GKE Native Support for Custom Metrics: Smarter Autoscaling Beyond CPU and Memory
Modern cloud-native applications rarely scale perfectly using CPU or memory metrics alone. Many workloads are driven by signals like…
What I've open-sourced
- 62
ChimbuChinnadurai/gcp-keda-gke-event-driven-autoscaling-demo
Built after explaining KEDA one too many times in customer calls.
- 5
ChimbuChinnadurai/gke-gcp-grpc-gateway-api-with-istio
gRPC server streaming service running on GKE with istio sidecar
- 0
ChimbuChinnadurai/terraform-aws-gcp-multicloud
Because 'multi-cloud' sounds great in boardrooms but gets chaotic the second routing enters the chat.
- 4
ChimbuChinnadurai/trading212-ISA-portfolio-tracker.git
A full-featured web application that fetches your Shares ISA positions from the Trading212 API and displays them in a rich, interactive dashboard.
- 11
doitintl/aws-eks-sample-templates
Templates for spinning up EKS Lens via Helm, minus the configuration headaches.
- 1
ChimbuChinnadurai/gitlab-oidc-with-gcp-workload-identity-federation
The secure, passwordless blueprint for authenticating GitLab CI/CD pipelines with GCP using WIP
Webinars I've hosted
Istio Ambient Mesh GA: Sidecar-less Service Mesh on Kubernetes
Top Kubernetes Updates of 2024: Gateway API, Pod Resizing, and More
Scaling Kubernetes Workloads with KEDA Event-Driven Autoscaling
Customers I've helped
PlayHQ Optimizes Multi-Tenant Kubernetes Costs
“Every customer has unique usage patterns. Manual resource optimization simply didn't scale—we needed automation to ensure every customer, regardless of size, had right-sized infrastructure without consuming our team's capacity.”
— Brad Quinn, Lead Platform Engineer, PlayHQ
Optimove cuts execution times by up to 60%
“We are thrilled with DoiT International's expertise to migrate Optimove to Google Cloud with ease and efficiency. Their expert guidance and seamless migration allowed us to scale our services effortlessly and focus on what we do best – delivering emotionally intelligent marketing interactions.”
— Amir Gabay, VP of Technical Operations
Talks I've given
Unlock Powerful Progressive Delivery with Gateway API and Argo rollouts
K8SUG UK Meetup · London, UK · Aug 28, 2024
Simplified and Cost-Efficient GKE Node Management with NAP
PerfectScale · Remote · May 22, 2025
ILT - Google Kubernetes Engine(GKE)
Google Cloud (Authorized Trainer) · Jan 1, 2025
ILT - Google Cloud Fundamentals
Google Cloud (Authorized Trainer) · Feb 1, 2024
Come work with me
Open roles I'd love to refer you for
If it's running in production, it deserves to be understood — not just monitored.
DoiT Cloud Intelligence™
Delivering the true promise of the cloud
Others surface recommendations. Cloud Intelligence™ makes them happen. Closed-loop optimization with Forward Deployed Engineers embedded.
Commitments
Auto-cover with Savings Plans
Kubernetes
Right-size pods from usage
Spot
Shift to spot safely
Data Lakes
Tune Snowflake & BigQuery
month-to-date
$56,500end-of-month
$128,200last 12 weeks
Connect with the tools used by your teams
All clouds. All SaaS.
Fast-growing companies run on Cloud Intelligence™
Savings on Kubernetes
Audited Savings
“PerfectScale gave us what dashboards and meetings never could: a safe, automated way to reduce Kubernetes waste without risking uptime. We now treat optimization as governance, not guesswork.””
Thomas Comtet
Senior Staff Engineer, SNCF
Field Experts Across Every Time Zone
DoiT experts across regions and specialties, helping teams solve cloud challenges worldwide.
- UTC-86 FDEsAWS Core Services×3AWS DevOps×2AWS Networking×2
+1
- UTC-75 FDEsAWS×2Networking×2AI×1
- UTC-66 FDEsAI×1Aurora×1AWS×1
+1
- UTC-525 FDEsAWS Core Services×5AWS DevOps×5AWS Security and Identity×5
+20
- UTC10 FDEsAWS×3AI×2AWS Core Services×2
+5
- UTC+121 FDEsAWS×3BigQuery×3RDS×3
+16
- UTC+213 FDEsAWS Core Services×4AWS Networking×4AWS Serverless×4
+8
- UTC+82 FDEsAgentCore×1Agentic AI×1Aurora×1
- UTC+92 FDEsAWS Core Services×2AWS DevOps×1AWS Networking×1
- UTC+102 FDEsAWS Kubernetes×1AWS Serverless×1Google Cloud DevOps×1
- UTC+114 FDEsAWS Databases×2AWS×1AWS AI/ML×1
From the Field
Cloud Engineering Beyond the Happy Path
Talks, insights, and signals for engineers navigating alerts, scaling pain, and platform complexity.
Cloud Masters
Cloud Masters distills patterns from 4,500+ customer engagements into short, tactical episodes for practitioners.
Applied FinOps Show
Field notes from FinOps practitioners on engineering pushback, stalled savings, and allocation models that break under real multicloud workloads.
AI Signal Daily
Daily AI signal, minus the launch spam — curated for cloud and AI practitioners at DoiT.
Cloud Intelligence™ Metrics
Live and unfiltered — right now, not last quarter.
What customers are saying
It’s great that you – the DoIT team – always provide us with such good support when incidents arise and with the usual cloud issues, big and small.
Today
Paul was very helpful in reviewing my AWS configuration and coordinating with the AWS SRT team.
Today
Good and fast response from DoIT. It took some time for AWS to recognize their issue but DOIT helped us by confirming that they have other customers reporting this issue.
Today
NA
Today
good adn fast answer
Today
This was a tough one, I appreciate everyone pushing through!
Today
Kefeng responded quickly, was helpful and knowledgeable. We got the issue resolved quickly. I would have struggled to solve this on my own.
Today
Percise and fast instructions.
Today
Helpful and quick resolution
Today
The initial point of contact raised the case quickly, and then you responded to the case in a timely manner too, both much appreciated
Today
If there is another word for amazing. Please give that to Simon.
Today
Your team has presented our case to AWS really well. As I've said in the ticket, their attention to detail was truly impressive. The follow-up questions they asked AWS show the care they put into our case. Much appreciated!
Today
Really timely and considered help
Today
Great feedback, fast and clear
Today
Very effective support.
Today
Dhiraj Bhamare was, as always, the right one to call for it. After several hours of research from my side without a clear path, a 30 minute long call with him put the whole team on the right initiative to tackle. Even with our biggest aurora database (30T) he provide a clear migration path and my team is working on it. Thanks again!
Today
Great support as always :)
Today
Marcin was extremely helpful and knowledgeable as always.
Today
Brilliant support and super fast
Today
I received help and explanations that were necessary in order to resolve the issue. The response was rather quick and was specific to what I needed
Today
Your cloud infrastructure, always at its best
Optimization, automation, expertise. In one platform