Site Reliability Engineer · Auckland, NZ

Aruna K.

Building resilient systems at scale — keeping WEX infrastructure alive, observable, and perpetually deployable.

Infrastructure & Cloud Kubernetes Observability CI/CD AWS · GCP · Azure NZ-based

Years SRE

99.9%

Uptime Target

WEX

Current Employer

Experience

2022 — Present

WEX Inc.

📍 Auckland, NZ

Site Reliability Engineer

Designed and maintained multi-region cloud infrastructure on AWS, ensuring high availability for WEX payment processing systems serving millions of transactions daily.
Led Kubernetes cluster migrations and lifecycle management across production environments, reducing deployment failures by 40% through improved rollout strategies.
Built end-to-end observability stacks using Datadog, Prometheus, and Grafana — defining SLOs/SLIs and reducing MTTD by over 60%.
Established and maintained CI/CD pipelines in GitHub Actions and ArgoCD, enabling teams to ship with confidence via automated canary deployments and rollback gates.
Conducted regular game days and chaos engineering exercises to validate system resilience, improving incident response times by 35%.
Championed infrastructure-as-code practices with Terraform, bringing 100% of production infrastructure under version control.

AWS Kubernetes Terraform Datadog ArgoCD GitHub Actions Prometheus Grafana

AWS Solutions Architect Amazon Web Services

Certified Kubernetes Admin CNCF

Google Cloud Professional Google Cloud

Skills

Infrastructure & Cloud

AWS (EC2, EKS, RDS, S3) 92%

Terraform / IaC 88%

GCP / Azure 72%

Networking & VPCs 80%

Kubernetes & Containers

Kubernetes (EKS/GKE) 90%

Helm / Kustomize 85%

Docker 94%

ArgoCD / GitOps 82%

Observability & Monitoring

Datadog 91%

Prometheus & Grafana 88%

SLO / SLI Design 85%

PagerDuty / Alerting 87%

CI/CD & DevOps

GitHub Actions 90%

Jenkins / Tekton 78%

Python / Bash Scripting 86%

Chaos Engineering 75%

Key Projects

PROJECT / 001

Zero-Downtime Migration to EKS

Led the full migration of WEX's core payment services from EC2-based deployments to Amazon EKS. Implemented blue-green deployment strategies and automated rollback mechanisms across 12 microservices.

0 hrs

Downtime during migration

EKSTerraformHelmArgoCD

PROJECT / 002

Observability Platform Build

Designed and deployed a unified observability platform across all WEX services in APAC. Standardised SLO definitions, built custom Grafana dashboards, and integrated automated incident routing via PagerDuty.

60%

Reduction in MTTD

DatadogGrafanaPrometheusPagerDuty

PROJECT / 003

IaC Terraform Refactor

Brought 100% of production cloud infrastructure under Terraform management — replacing manual console changes with modular, reusable IaC. Introduced remote state management and drift detection via CI gates.

100%

Infra under version control

TerraformAWSGitHub ActionsAtlantis

PROJECT / 004

CI/CD Pipeline Overhaul

Rebuilt legacy Jenkins pipelines into GitHub Actions workflows with canary deployments, automated integration tests, and feature flag integration. Reduced deploy time from 45 minutes to under 8 minutes.

82%

Faster deployments

GitHub ActionsArgoCDDockerLaunchDarkly

Aruna K.

Experience

Skills

Key Projects

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