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Justin Arulnathan

CAREER SUMMARY

› 10+ years developing web applications with a firm foundation in modern Python, Django & FastAPI.

› Strong understanding of infrastructure as code, automation and optimisation of cloud infrastructure.

› Passionate about improving developer experience through continuous improvement of tooling and processes.

› Pragmatic and collaborative, favouring value to the business and its customers over shiny new tools.

› Safely integrating agentic AI tooling into the SDLC to enable rapid iteration and reduce cognitive load.

EMPLOYMENT HISTORY

CardioNexus - Senior DevOps Engineer

September 2024 - June 2026

› Developed and maintained ETL pipelines for ingesting medical device transmissions in HL7 format (AWS Lambda, Python, Typescript)

› Developed and maintained web portals used by healthcare professionals to aid the diagnosis of cardiac health issues using patient device transmission data (AWS ECS, FastAPI, React/Typescript, Auth0)

› Championed observability and monitoring of application and infrastructure components across microservice architecture, including the implementation of distributed tracing (OpenTelemetry, AWS Cloudwatch & X-Ray)

› Established and upheld best practices for secure continuous delivery of applications and infrastructure (Terraform, Github Actions, Bash, Powershell)

› Played a key role in aligning the organisation's security posture with ISO 27001 standards by remediating security and compliance issues identified by external audit (Vanta)

Common Code - Senior Full-Stack Developer, DevOps Engineer

2016 - June 2023

› Worked on a variety of projects for clients in the public and private sectors, including government agencies, non-profits, and startups.

› Provided technical leadership on projects, making decisions around application design and architecture.

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

› Mentoring and coaching internal developers.

Full Stack Web Developer - New Atlas

2011 - 2016

› Developed internal and external-facing features for a heavily trafficked news site with an emphasis on SEO.

› Contributed to the design, development and migration from a bespoke PHP web application to a modern, standards-based CMS built using the Django framework.

RECENT PROJECTS

Utility Mapping

Oct 2020 – Nov 2021 | Technical lead, Full Stack Developer (React Native), DevOps Engineer

  • › Green-field, geospatial data project targeting Web, Android and iOS. Server-side infrastructure was built on ECS Fargate (AWS).
  • › Integration with multiple 3rd party REST and SOAP APIs.
  • › Implemented a release management strategy to enable staged rollouts of new versions of the mobile app.

Karista

Nov 2021 – Feb 2022 | Technical lead, DevOps Engineer

  • › Application uplift - Migrated a Django + React app into a form which was deployable as Docker containers.
  • › Infrastructure uplift - Migrated to cloud-native, stateless architecture, formalised in Terraform and continuously deployed to multiple environments via CI/CD pipeline.
  • › Replaced clickops-heavy manual deployment process with automated Github Actions workflows.

MedAdvisor

April 2020 – June 2021 | DevOps Engineer

  • › Provided the platform support required to enable a rewrite of the app which was deployable to stateless, horizontally scalable architecture on AWS.
  • › Worked within a mature DevOps team following principles such as the AWS Well-Architected Framework.
  • › Provided visibility across the application stack and infrastructure by instrumenting and configuring Datadog monitoring agents.
  • › Upgraded application and infrastructure CI/CD pipelines to facilitate Blue-Green deployments. Ensured a smooth transition by coaching development teams on new standards of automation and observability.
  • › Remediated security and compliance issues identified by an external audit.

EDUCATION

Swinburne University

2001 – 2004 | Bachelor of Information Technology

University of Melbourne

2005 – 2010 | Bachelor of Science - Behavioural Neuroscience

QUALIFICATIONS

Axis Agile

2017 - Certified Scrum Master

TECHNICAL SKILLSET

Languages & Frameworks - Professional Grade

I have authored software in production which utilise the following technologies

  • Git
  • Python
  • Django
  • FastAPI
  • Claude Code
  • Celery
  • Bash
  • Powershell
  • React
  • React Native
  • VueJS
  • NextJS
  • Typescript
  • Node
  • Docker
  • Docker Compose
  • Terraform
  • Cloudformation
  • Cloud Init
  • Sceptre
  • Hashicorp Vault
  • Nginx
  • Packer
  • Chef
  • Postgres
  • Redis
  • MongoDB
  • Jenkins

SaaS & PaaS Tools

Comfortable with using these to support production grade applications.

  • AWS
  • Azure
  • Github Actions
  • CircleCI
  • Bitbucket Pipelines
  • Sentry
  • Datadog
  • New Relic
  • Papertrail
  • Loggly
  • Elastic Cloud
  • Terraform Cloud
  • Balena.io
  • Expo
  • Cloudflare Tunnels & Access
  • Auth0
  • Okta
  • Octopus Deploy
  • TeamCity

Languages, Frameworks and SaaS - Hobby Grade

Some non-professional experience with the following:

  • Kubernetes
  • Google Cloud Platform
  • Rust
  • Go
  • Fly.io
  • Reflex
  • Vector
  • Grafana
  • InfluxDB
  • Traefik
  • Prometheus
  • Digital Ocean
  • Tailscale
  • Pangolin

CONTACT