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Justin Arulnathan

PROFESSIONAL SUMMARY

› Senior DevOps and Platform Engineering professional with 10+ years delivering cloud-native infrastructure, CI/CD automation, platform reliability and operational excellence across enterprise software organisations.

› Experience in leading cross-functional initiatives, influencing engineering strategy and partnering with product, security and operations teams to build scalable, secure platforms on AWS.

› Passionate about automation, observability, resilience and continuous improvement with a hands-on approach to engineering leadership.

› Pragmatic, collaborative, and inquisitive - not motivated by complexity or novelty, but by the opportunity to build the right solution for the humans who need it.

EMPLOYMENT HISTORY

CardioNexus - Senior DevOps Engineer

September 2024 - June 2026

› Managed the performance and availability of a SaaS platform used by healthcare professionals for diagnosis of cardiac health issues

› Ownership of mission-critical ETL pipelines used to ingest PII and PHI (patient medical device transmissions)

› Championed observability and monitoring of production application and infrastructure components, including distributed tracing across microservice architecture

› Established the baseline standard for secure, human-gated CI/CD pipelines used for continuous delivery of applications

› Introduced pattern of immutable infrastructure, automating the provisioning of infrastructure and ensuring single source of truth for AWS resources

› Aligned the organisation's security posture with ISO 27001 standards by remediating security and vulnerability issues across the stack

› Cost-optimised multi-account AWS setup, eliminating ~7% of monthly infrastructure cost

Common Code - Senior Full-Stack Developer, DevOps Engineer

2016 - June 2023

› Assumed technical lead role on more than 5 engagements, driving decisions around solution design and architecture

› Coordinated the delivery of numerous projects using Agile or Scrum methodologies

› Forward deployed on small (3-10) cross-functional teams for clients, whose product ranged from greenfield to legacy. Engagements were in both public and private sectors, including government agencies, non-profits, and startups

› Mentored and coached internal developers with regular (weekly) 1-to-1's. Promoted a culture of knowledge and skill sharing with regular, informal team showcases

SKILLS / TECH

Programming Languages

  • Python
  • Typescript
  • Bash
  • PowerShell

Cloud Platforms

  • AWS
  • GCP
  • Azure

AWS Expertise

  • VPC/Networking
  • Cloudformation
  • ECS
  • Lambda
  • EC2
  • Cloudwatch
  • IAM
  • Well architected framework

DevOps Tools

  • Docker
  • Terraform
  • Ansible
  • Chef
  • Puppet

DevX Tools

  • Claude Code
  • Precommit

Observability

  • DataDog
  • NewRelic
  • ELK

CI/CD & Testing

  • Git
  • Playwright
  • ArgoCD
  • Github Actions
  • CircleCI
  • Expo

CONTACT